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132 results on '"Harke-Hosemann, A."'

1. A Measurement of Gravitational Lensing of the Cosmic Microwave Background Using SPT-3G 2018 Data

Author: Pan, Z., Bianchini, F., Wu, W. L. K., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Ansarinejad, B., Archipley, M., Aylor, K., Balkenhol, L., Barry, P. S., Thakur, R. Basu, Benabed, K., Bender, A. N., Benson, B. A., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Camphuis, E., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Chichura, P. M., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Coerver, A., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K. R., Ding, J., Dobbs, M. A., Doussot, A., Dutcher, D., Everett, W., Feng, C., Ferguson, K. R., Fichman, K., Foster, A., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Ge, F., Goeckner-Wald, N., Gualtieri, R., Guidi, F., Guns, S., Gupta, N., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O., Jonas, M., Jones, A., Kéruzoré, F., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Levy, K., Lowitz, A. E., Lu, C., Maniyar, A., Menanteau, F., Meyer, S. S., Michalik, D., Millea, M., Montgomery, J., Nadolski, A., Nakato, Y., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Paschos, P., Pearson, J., Posada, C. M., Prabhu, K., Quan, W., Raghunathan, S., Rahimi, M., Rahlin, A., Reichardt, C. L., Riebel, D., Riedel, B., Ruhl, J. E., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Takakura, S., Tandoi, C., Thompson, K. L., Thorne, B., Trendafilova, C., Tucker, C., Umilta, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., Young, M. R., and Zebrowski, J. A.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present a measurement of gravitational lensing over 1500 deg$^2$ of the Southern sky using SPT-3G temperature data at 95 and 150 GHz taken in 2018. The lensing amplitude relative to a fiducial Planck 2018 $\Lambda$CDM cosmology is found to be $1.020\pm0.060$, excluding instrumental and astrophysical systematic uncertainties. We conduct extensive systematic and null tests to check the robustness of the lensing measurements, and report a minimum-variance combined lensing power spectrum over angular multipoles of $50
Published: 2023
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2. Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope

Author: Chichura, P. M., Foster, A., Patel, C., Ossa-Jaen, N., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Archipley, M., Austermann, J. E., Avva, J. S., Balkenhol, L., Barry, P. S., Thakur, R. Basu, Beall, J. A., Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Chiang, H. C., Cho, H. -M., Chou, T-L., Citron, R., Cliche, J. -F., Crawford, T. M., Crites, A. T., Cukierman, A., Daley, C. M., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Feng, C., Ferguson, K. R., Fu, J., Galli, S., Gallicchio, J., Gambrel, A. E., Gardner, R. W., George, E. M., Goeckner-Wald, N., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., de Haan, T., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Hrubes, J. D., Huang, N., Hubmayr, J., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Li, D., Lowitz, A., Lu, C., Marrone, D. P., McMahon, J. J., Meyer, S. S., Michalik, D., Millea, M., Mocanu, L. M., Montgomery, J., Moran, C. Corbett, Nadolski, A., Natoli, T., Nguyen, H., Nibarger, J. P., Noble, G., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Patil, S., Pearson, J., Phadke, K. A., Posada, C. M., Prabhu, K., Pryke, C., Quan, W., Rahlin, A., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Saliwanchik, B. R., Sayre, J. T., Schaffer, K. K., Schiappucci, E., Shirokoff, E., Sievers, C., Smecher, G., Sobrin, J. A., Springmann, A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Tandoi, C., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Veach, T., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Earth and Planetary Astrophysics
Abstract: We present the first measurements of asteroids in millimeter wavelength (mm) data from the South Pole Telescope (SPT), which is used primarily to study the cosmic microwave background (CMB). We analyze maps of two $\sim270$ deg$^2$ sky regions near the ecliptic plane, each observed with the SPTpol camera $\sim100$ times over one month. We subtract the mean of all maps of a given field, removing static sky signal, and then average the mean-subtracted maps at known asteroid locations. We detect three asteroids$\text{ -- }$(324) Bamberga, (13) Egeria, and (22) Kalliope$\text{ -- }$with signal-to-noise ratios (S/N) of 11.2, 10.4, and 6.1, respectively, at 2.0 mm (150 GHz); we also detect (324) Bamberga with S/N of 4.1 at 3.2 mm (95 GHz). We place constraints on these asteroids' effective emissivities, brightness temperatures, and light curve modulation amplitude. Our flux density measurements of (324) Bamberga and (13) Egeria roughly agree with predictions, while our measurements of (22) Kalliope suggest lower flux, corresponding to effective emissivities of $0.66 \pm 0.11$ at 2.0 mm and $<0.47$ at 3.2mm. We predict the asteroids detectable in other SPT datasets and find good agreement with detections of (772) Tanete and (1093) Freda in recent data from the SPT-3G camera, which has $\sim10 \times$ the mapping speed of SPTpol. This work is the first focused analysis of asteroids in data from CMB surveys, and it demonstrates we can repurpose historic and future datasets for asteroid studies. Future SPT measurements can help constrain the distribution of surface properties over a larger asteroid population., Comment: 21 pages, 9 figures
Published: 2022
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3. The Design and Integrated Performance of SPT-3G

Author: Sobrin, J. A., Anderson, A. J., Bender, A. N., Benson, B. A., Dutcher, D., Foster, A., Goeckner-Wald, N., Montgomery, J., Nadolski, A., Rahlin, A., Ade, P. A. R., Ahmed, Z., Anderes, E., Archipley, M., Austermann, J. E., Avva, J. S., Aylor, K., Balkenhol, L., Barry, P. S., Thakur, R. Basu, Benabed, K., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Everett, W., Feng, C., Ferguson, K. R., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Lu, C., Meyer, S. S., Michalik, D., Millea, M., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Prabhu, K., Quan, W., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Saliwanchik, B., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Tandoi, C., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: SPT-3G is the third survey receiver operating on the South Pole Telescope dedicated to high-resolution observations of the cosmic microwave background (CMB). Sensitive measurements of the temperature and polarization anisotropies of the CMB provide a powerful dataset for constraining cosmology. Additionally, CMB surveys with arcminute-scale resolution are capable of detecting galaxy clusters, millimeter-wave bright galaxies, and a variety of transient phenomena. The SPT-3G instrument provides a significant improvement in mapping speed over its predecessors, SPT-SZ and SPTpol. The broadband optics design of the instrument achieves a 430 mm diameter image plane across observing bands of 95 GHz, 150 GHz, and 220 GHz, with 1.2 arcmin FWHM beam response at 150 GHz. In the receiver, this image plane is populated with 2690 dual-polarization, tri-chroic pixels (~16000 detectors) read out using a 68X digital frequency-domain multiplexing readout system. In 2018, SPT-3G began a multiyear survey of 1500 deg$^{2}$ of the southern sky. We summarize the unique optical, cryogenic, detector, and readout technologies employed in SPT-3G, and we report on the integrated performance of the instrument., Comment: 25 pages, 11 figures. Accepted for publication in ApJS
Published: 2021
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4. The Design and Integrated Performance of SPT-3G

Author: Sobrin, JA, Anderson, AJ, Bender, AN, Benson, BA, Dutcher, D, Foster, A, Goeckner-Wald, N, Montgomery, J, Nadolski, A, Rahlin, A, Ade, PAR, Ahmed, Z, Anderes, E, Archipley, M, Austermann, JE, Avva, JS, Aylor, K, Balkenhol, L, Barry, PS, Thakur, R Basu, Benabed, K, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, EV, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, and Ruhl, JE
Subjects: Astronomical Sciences, Physical Sciences, Astronomical and Space Sciences, Atomic, Molecular, Nuclear, Particle and Plasma Physics, Physical Chemistry (incl. Structural), Astronomy & Astrophysics, Astronomical sciences
Abstract: SPT-3G is the third survey receiver operating on the South Pole Telescope dedicated to high-resolution observations of the cosmic microwave background (CMB). Sensitive measurements of the temperature and polarization anisotropies of the CMB provide a powerful data set for constraining cosmology. Additionally, CMB surveys with arcminute-scale resolution are capable of detecting galaxy clusters, millimeter-wave bright galaxies, and a variety of transient phenomena. The SPT-3G instrument provides a significant improvement in mapping speed over its predecessors, SPT-SZ and SPTpol. The broadband optics design of the instrument achieves a 430 mm diameter image plane across observing bands of 95, 150, and 220 GHz, with 1.2′ FWHM beam response at 150 GHz. In the receiver, this image plane is populated with 2690 dual-polarization, trichroic pixels ( 1/416,000 detectors) read out using a 68× digital frequency-domain multiplexing readout system. In 2018, SPT-3G began a multiyear survey of 1500 deg2 of the southern sky. We summarize the unique optical, cryogenic, detector, and readout technologies employed in SPT-3G, and we report on the integrated performance of the instrument.
Published: 2022

5. Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model

Author: Montgomery, J., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Archipley, M., Avva, J. S., Aylor, K., Balkenhol, L., Barry, P. S., Thakur, R. Basu, Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Dutcher, D., Elleflot, T., Everett, W., Feng, C., Ferguson, K. R., Foster, A., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Goeckner-Wald, N., Groh, J. C., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Lu, C., Meyer, S. S., Michalik, D., Millea, M., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Prabhu, K., Quan, W., Rahlin, A., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The third generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. The technology used to read out and control these detectors, digital frequency-domain multiplexing (DfMUX), is conceptually the same as used for SPTpol, but extended to accommodate more detectors. A nearly 5x expansion in the readout operating bandwidth has enabled the use of this large focal plane, and SPT-3G performance meets the forecasting targets relevant to its science objectives. However, the electrical dynamics of the higher-bandwidth readout differ from predictions based on models of the SPTpol system due to the higher frequencies used, and parasitic impedances associated with new cryogenic electronic architecture. To address this, we present an updated derivation for electrical crosstalk in higher-bandwidth DfMUX systems, and identify two previously uncharacterized contributions to readout noise, which become dominant at high bias frequency. The updated crosstalk and noise models successfully describe the measured crosstalk and readout noise performance of SPT-3G. These results also suggest specific changes to warm electronics component values, wire-harness properties, and SQUID parameters, to improve the readout system for future experiments using DfMUX, such as the LiteBIRD space telescope., Comment: Accepted to the Journal of Astronomical Telescopes, Instruments, and Systems
Published: 2021
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6. Constraints on $\Lambda$CDM Extensions from the SPT-3G 2018 $EE$ and $TE$ Power Spectra

Author: Balkenhol, L., Dutcher, D., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Archipley, M., Avva, J. S., Aylor, K., Barry, P. S., Thakur, R. Basu, Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Everett, W., Feng, C., Ferguson, K. R., Foster, A., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Goeckner-Wald, N., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Lu, C., Meyer, S. S., Michalik, D., Millea, M., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Prabhu, K., Quan, W., Rahlin, A., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present constraints on extensions to the $\Lambda$CDM cosmological model from measurements of the $E$-mode polarization auto-power spectrum and the temperature-$E$-mode cross-power spectrum of the cosmic microwave background (CMB) made using 2018 SPT-3G data. The extensions considered vary the primordial helium abundance, the effective number of relativistic degrees of freedom, the sum of neutrino masses, the relativistic energy density and mass of a sterile neutrino, and the mean spatial curvature. We do not find clear evidence for any of these extensions, from either the SPT-3G 2018 dataset alone or in combination with baryon acoustic oscillation and \textit{Planck} data. None of these model extensions significantly relax the tension between Hubble-constant, $H_0$, constraints from the CMB and from distance-ladder measurements using Cepheids and supernovae. The addition of the SPT-3G 2018 data to \textit{Planck} reduces the square-root of the determinants of the parameter covariance matrices by factors of $1.3 - 2.0$ across these models, signaling a substantial reduction in the allowed parameter volume. We also explore CMB-based constraints on $H_0$ from combined SPT, \textit{Planck}, and ACT DR4 datasets. While individual experiments see some indications of different $H_0$ values between the $TT$, $TE$, and $EE$ spectra, the combined $H_0$ constraints are consistent between the three spectra. For the full combined datasets, we report $H_0 = 67.49 \pm 0.53\,\mathrm{km\,s^{-1}\,Mpc^{-1}}$, which is the tightest constraint on $H_0$ from CMB power spectra to date and in $4.1\,\sigma$ tension with the most precise distance-ladder-based measurement of $H_0$. The SPT-3G survey is planned to continue through at least 2023, with existing maps of combined 2019 and 2020 data already having $\sim3.5\times$ lower noise than the maps used in this analysis., Comment: Submitted to PRD; 19 pages, 7 figures
Published: 2021
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7. Detection of Galactic and Extragalactic Millimeter-Wavelength Transient Sources with SPT-3G

Author: Guns, S., Foster, A., Daley, C., Rahlin, A., Whitehorn, N., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Archipley, M., Avva, J. S., Aylor, K., Balkenhol, L., Barry, P. S., Thakur, R. Basu, Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Crawford, T. M., Cukierman, A., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Feng, C., Ferguson, K. R., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Goeckner-Wald, N., Gualtieri, R., Gupta, N., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Lu, C., Marrone, D. P., Meyer, S. S., Michalik, D., Millea, M., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Pearson, J., Phadke, K. A., Posada, C. M., Prabhu, K., Quan, W., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Vieira, J. D., Wang, G., Wu, W. L. K., Yefremenko, V., Yoon, K. W., Young, M. R., and Zhang, L.
Subjects: Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Solar and Stellar Astrophysics
Abstract: High-angular-resolution cosmic microwave background experiments provide a unique opportunity to conduct a survey of time-variable sources at millimeter wavelengths, a population which has primarily been understood through follow-up measurements of detections in other bands. Here we report the first results of an astronomical transient survey with the South Pole Telescope (SPT) using the SPT-3G camera to observe 1500 square degrees of the southern sky. The observations took place from March to November 2020 in three bands centered at 95, 150, and 220 GHz. This survey yielded the detection of fifteen transient events from sources not previously detected by the SPT. The majority are associated with variable stars of different types, expanding the number of such detected flares by more than a factor of two. The stellar flares are unpolarized and bright, in some cases exceeding 1 Jy, and have durations from a few minutes to several hours. Another population of detected events last for 2--3 weeks and appear to be extragalactic in origin. Though data availability at other wavelengths is limited, we find evidence for concurrent optical activity for two of the stellar flares. Future data from SPT-3G and forthcoming instruments will provide real-time detection of millimeter-wave transients on timescales of minutes to months., Comment: 14 pages, 9 figures; accepted to ApJ 5/27
Published: 2021
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8. Measurements of the E-Mode Polarization and Temperature-E-Mode Correlation of the CMB from SPT-3G 2018 Data

Author: Dutcher, D., Balkenhol, L., Ade, P. A. R., Ahmed, Z., Anderes, E., Anderson, A. J., Archipley, M., Avva, J. S., Aylor, K., Barry, P. S., Thakur, R. Basu, Benabed, K., Bender, A. N., Benson, B. A., Bianchini, F., Bleem, L. E., Bouchet, F. R., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Chaubal, P., Chen, G., Cho, H. -M., Chou, T. -L., Cliche, J. -F., Crawford, T. M., Cukierman, A., Daley, C., de Haan, T., Denison, E. V., Dibert, K., Ding, J., Dobbs, M. A., Everett, W., Feng, C., Ferguson, K. R., Foster, A., Fu, J., Galli, S., Gambrel, A. E., Gardner, R. W., Goeckner-Wald, N., Gualtieri, R., Guns, S., Gupta, N., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Hivon, E., Holder, G. P., Holzapfel, W. L., Hood, J. C., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Lu, C., Meyer, S. S., Michalik, D., Millea, M., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Omori, Y., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Prabhu, K., Quan, W., Raghunathan, S., Rahlin, A., Reichardt, C. L., Riebel, D., Riedel, B., Rouble, M., Ruhl, J. E., Sayre, J. T., Schiappucci, E., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Thorne, B., Tucker, C., Umilta, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power spectrum of the cosmic microwave background using data collected by SPT-3G, the latest instrument installed on the South Pole Telescope. This analysis uses observations of a 1500 deg$^2$ region at 95, 150, and 220 GHz taken over a four month period in 2018. We report binned values of the $EE$ and $TE$ power spectra over the angular multipole range $300 \le \ell < 3000$, using the multifrequency data to construct six semi-independent estimates of each power spectrum and their minimum-variance combination. These measurements improve upon the previous results of SPTpol across the multipole ranges $300 \le \ell \le 1400$ for $EE$ and $300 \le \ell \le 1700$ for $TE$, resulting in constraints on cosmological parameters comparable to those from other current leading ground-based experiments. We find that the SPT-3G dataset is well-fit by a $\Lambda$CDM cosmological model with parameter constraints consistent with those from Planck and SPTpol data. From SPT-3G data alone, we find $H_0 = 68.8 \pm 1.5 \mathrm{km\,s^{-1}\,Mpc^{-1}}$ and $\sigma_8 = 0.789 \pm 0.016$, with a gravitational lensing amplitude consistent with the $\Lambda$CDM prediction ($A_L = 0.98 \pm 0.12$). We combine the SPT-3G and the Planck datasets and obtain joint constraints on the $\Lambda$CDM model. The volume of the 68% confidence region in six-dimensional $\Lambda$CDM parameter space is reduced by a factor of 1.5 compared to Planck-only constraints, with only slight shifts in central values. We note that the results presented here are obtained from data collected during just half of a typical observing season with only part of the focal plane operable, and that the active detector count has since nearly doubled for observations made with SPT-3G after 2018.
Published: 2021
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9. Constraints on ΛCDM extensions from the SPT-3G 2018 EE and TE power spectra

Author: Balkenhol, L, Dutcher, D, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Barry, PS, Thakur, R Basu, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, EV, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, and Schiappucci, E
Subjects: Particle and High Energy Physics, Physical Sciences
Abstract: We present constraints on extensions to the ΛCDM cosmological model from measurements of the E-mode polarization autopower spectrum and the temperature-E-mode cross-power spectrum of the cosmic microwave background (CMB) made using 2018 SPT-3G data. The extensions considered vary the primordial helium abundance, the effective number of relativistic degrees of freedom, the sum of neutrino masses, the relativistic energy density and mass of a sterile neutrino, and the mean spatial curvature. We do not find clear evidence for any of these extensions, from either the SPT-3G 2018 dataset alone or in combination with baryon acoustic oscillation and Planck data. None of these model extensions significantly relax the tension between Hubble-constant, H0, constraints from the CMB and from distance-ladder measurements using Cepheids and supernovae. The addition of the SPT-3G 2018 data to Planck reduces the square-root of the determinants of the parameter covariance matrices by factors of 1.3-2.0 across these models, signaling a substantial reduction in the allowed parameter volume. We also explore CMB-based constraints on H0 from combined SPT, Planck, and ACT DR4 datasets. While individual experiments see some indications of different H0 values between the TT, TE, and EE spectra, the combined H0 constraints are consistent between the three spectra. For the full combined datasets, we report H0=67.49±0.53 km s-1 Mpc-1, which is the tightest constraint on H0 from CMB power spectra to date and in 4.1σ tension with the most precise distance-ladder-based measurement of H0. The SPT-3G survey is planned to continue through at least 2023, with existing maps of combined 2019 and 2020 data already having ∼3.5×lower noise than the maps used in this analysis.
Published: 2021

10. Broadband, millimeter-wave antireflection coatings for large-format, cryogenic aluminum oxide optics

Author: Nadolski, A., Vieira, J. D., Sobrin, J. A., Kofman, A. M., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Bryant, L., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cheshire IV, J. R., Chesmore, G. E., Cliche, J. F., Cukierman, A., de Haan, T., Dierickx, M., Ding, J., Dutcher, D., Everett, W., Farwick, J., Ferguson, K. R., Florez, L., Foster, A., Fu, J., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Groh, J. C., Guns, S., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Harris, R. J., Henning, J. W., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O., Jonas, M., Jones, A., Korman, M., Kovac, J., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Lowitz, A. E., McMahon, J., Meier, J., Meyer, S. S., Michalik, D., Montgomery, J., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., sada, C. M. Po, Quan, W., Rahlin, A., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Tandoi, C., Thompson, K. L., Tucker, C., Vanderlinde, K., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Physics - Instrumentation and Detectors, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: We present two prescriptions for broadband (~77 - 252 GHz), millimeter-wave antireflection coatings for cryogenic, sintered polycrystalline aluminum oxide optics: one for large-format (700 mm diameter) planar and plano-convex elements, the other for densely packed arrays of quasi-optical elements, in our case 5 mm diameter half-spheres (called "lenslets"). The coatings comprise three layers of commercially-available, polytetrafluoroethylene-based, dielectric sheet material. The lenslet coating is molded to fit the 150 mm diameter arrays directly while the large-diameter lenses are coated using a tiled approach. We review the fabrication processes for both prescriptions then discuss laboratory measurements of their transmittance and reflectance. In addition, we present the inferred refractive indices and loss tangents for the coating materials and the aluminum oxide substrate. We find that at 150 GHz and 300 K the large-format coating sample achieves (97 +/- 2)% transmittance and the lenslet coating sample achieves (94 +/- 3)% transmittance., Comment: 19 pages, 11 figures; submitted 05 Dec 2019, accepted 26 Feb 2020
Published: 2019
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11. Particle Physics with the Cosmic Microwave Background with SPT-3G

Author: Avva, J. S., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Aylor, K., Thakur, R. Basu, Bender, A. N., Benson, B. A., Bleem, L. E., Bocquet, S., Bryant, L., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Crawford, T. M., Cukierman, A., de Haan, T., Ding, J., Dobbs, M. A., Dodelson, S., Dutcher, D., Everett, W., Ferguson, K. R., Foster, A., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Groh, J. C., Guns, S., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Holder, G. P., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Quan, W., Raghunathan, S., Rahlin, A., Reichardt, C. L., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The cosmic microwave background (CMB) encodes information about the content and evolution of the universe. The presence of light, weakly interacting particles impacts the expansion history of the early universe, which alters the temperature and polarization anisotropies of the CMB. In this way, current measurements of the CMB place interesting constraints on the neutrino energy density and mass, as well as on the abundance of other possible light relativistic particle species. We present the status of an on-going 1500 sq. deg. survey with the SPT-3G receiver, a new mm-wavelength camera on the 10-m diameter South Pole Telescope (SPT). The SPT-3G camera consists of 16,000 superconducting transition edge sensors, a 10x increase over the previous generation camera, which allows it to map the CMB with an unprecedented combination of sensitivity and angular resolution. We highlight projected constraints on the abundance of sterile neutrinos and the sum of the neutrino masses for the SPT-3G survey, which could help determine the neutrino mass hierarchy., Comment: 6 pages, 2 figures, TAUP 2019
Published: 2019

12. Performance of Al-Mn Transition-Edge Sensor Bolometers in SPT-3G

Author: Anderson, A. J., Ade, P. A. R., Ahmed, Z., Avva, J. S., Barry, P. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cho, H. -M., Cliche, J. F., Cukierman, A., de Haan, T., Denison, E. V., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Ferguson, K. R., Foster, A., Fu, J., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Gilbert, A., Groh, J. C., Guns, S., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract: SPT-3G is a polarization-sensitive receiver, installed on the South Pole Telescope, that measures the anisotropy of the cosmic microwave background (CMB) from degree to arcminute scales. The receiver consists of ten 150~mm-diameter detector wafers, containing a total of 16,000 transition-edge sensor (TES) bolometers observing at 95, 150, and 220 GHz. During the 2018-2019 austral summer, one of these detector wafers was replaced by a new wafer fabricated with Al-Mn TESs instead of the Ti/Au design originally deployed for SPT-3G. We present the results of in-lab characterization and on-sky performance of this Al-Mn wafer, including electrical and thermal properties, optical efficiency measurements, and noise-equivalent temperature. In addition, we discuss and account for several calibration-related systematic errors that affect measurements made using frequency-domain multiplexing readout electronics., Comment: 9 pages, 5 figures, submitted to the Journal of Low Temperature Physics: LTD18 Special Edition
Published: 2019
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13. On-sky performance of the SPT-3G frequency-domain multiplexed readout

Author: Bender, A. N., Anderson, A. J., Avva, J. S., Ade, P. A. R., Ahmed, Z., Barry, P. S., Thakur, R. Basu, Benson, B. A., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cho, H. -M., Cliche, J. F., Cukierman, A., de Haan, T., Denison, E. V., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Ferguson, K. R., Foster, A., Fu, J., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Gilbert, A., Groh, J. C., Guns, S., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract: Frequency-domain multiplexing (fMux) is an established technique for the readout of large arrays of transition edge sensor (TES) bolometers. Each TES in a multiplexing module has a unique AC voltage bias that is selected by a resonant filter. This scheme enables the operation and readout of multiple bolometers on a single pair of wires, reducing thermal loading onto sub-Kelvin stages. The current receiver on the South Pole Telescope, SPT-3G, uses a 68x fMux system to operate its large-format camera of $\sim$16,000 TES bolometers. We present here the successful implementation and performance of the SPT-3G readout as measured on-sky. Characterization of the noise reveals a median pair-differenced 1/f knee frequency of 33 mHz, indicating that low-frequency noise in the readout will not limit SPT-3G's measurements of sky power on large angular scales. Measurements also show that the median readout white noise level in each of the SPT-3G observing bands is below the expectation for photon noise, demonstrating that SPT-3G is operating in the photon-noise-dominated regime., Comment: 9 pages, 5 figures submitted to the Journal of Low Temperature Physics: LTD18 Special Edition
Published: 2019
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14. Design and Bolometer Characterization of the SPT-3G First-year Focal Plane

Author: Everett, W., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics
Abstract: During the austral summer of 2016-17, the third-generation camera, SPT-3G, was installed on the South Pole Telescope, increasing the detector count in the focal plane by an order of magnitude relative to the previous generation. Designed to map the polarization of the cosmic microwave background, SPT-3G contains ten 6-in-hexagonal modules of detectors, each with 269 trichroic and dual-polarization pixels, read out using 68x frequency-domain multiplexing. Here we discuss design, assembly, and layout of the modules, as well as early performance characterization of the first-year array, including yield and detector properties., Comment: Conference proceeding for Low Temperature Detectors 2017. Accepted for publication: 27 August 2018
Published: 2019
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15. Year two instrument status of the SPT-3G cosmic microwave background receiver

Author: Bender, A. N., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Avva, J. S., Aylor, K., Barry, P. S., Thakur, R. Basu, Benson, B. A., Bleem, L. S., Bocquet, S., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cho, H. -M., Cliche, J. F., Crawford, T. M., Cukierman, A., de Haan, T., Denison, E. V., Ding, J., Dobbs, M. A., Dodelson, S., Dutcher, D., Everett, W., Foster, A., Gallicchio, J., Gilbert, A., Groh, J. C., Guns, S. T., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holder, G. P., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Knox, L., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Quan, W., Raghunathan, S., Rahlin, A., Reichardt, C. L., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract: The South Pole Telescope (SPT) is a millimeter-wavelength telescope designed for high-precision measurements of the cosmic microwave background (CMB). The SPT measures both the temperature and polarization of the CMB with a large aperture, resulting in high resolution maps sensitive to signals across a wide range of angular scales on the sky. With these data, the SPT has the potential to make a broad range of cosmological measurements. These include constraining the effect of massive neutrinos on large-scale structure formation as well as cleaning galactic and cosmological foregrounds from CMB polarization data in future searches for inflationary gravitational waves. The SPT began observing in January 2017 with a new receiver (SPT-3G) containing $\sim$16,000 polarization-sensitive transition-edge sensor bolometers. Several key technology developments have enabled this large-format focal plane, including advances in detectors, readout electronics, and large millimeter-wavelength optics. We discuss the implementation of these technologies in the SPT-3G receiver as well as the challenges they presented. In late 2017 the implementations of all three of these technologies were modified to optimize total performance. Here, we present the current instrument status of the SPT-3G receiver., Comment: 21 pages, 9 Figures, Presented at SPIE Astronomical Telescopes + Instrumentation 2018
Published: 2018
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16. Characterization and performance of the second-year SPT-3G focal plane

Author: Dutcher, D., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cliche, J. F., Cukierman, A., de Haan, T., Ding, J., Dobbs, M. A., Everett, W., Foster, A., Gallicchio, J., Gilbert, A., Groh, J. C., Guns, S. T., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: The third-generation instrument for the 10-meter South Pole Telescope, SPT-3G, was first installed in January 2017. In addition to completely new cryostats, secondary telescope optics, and readout electronics, the number of detectors in the focal plane has increased by an order of magnitude from previous instruments to ~16,000. The SPT-3G focal plane consists of ten detector modules, each with an array of 269 trichroic, polarization-sensitive pixels on a six-inch silicon wafer. Within each pixel is a broadband, dual-polarization sinuous antenna; the signal from each orthogonal linear polarization is divided into three frequency bands centered at 95, 150, and 220 GHz by in-line lumped element filters and transmitted via superconducting microstrip to Ti/Au transition-edge sensor (TES) bolometers. Properties of the TES film, microstrip filters, and bolometer island must be tightly controlled to achieve optimal performance. For the second year of SPT-3G operation, we have replaced all ten wafers in the focal plane with new detector arrays tuned to increase mapping speed and improve overall performance. Here we discuss the TES superconducting transition temperature and normal resistance, detector saturation power, bandpasses, optical efficiency, and full array yield for the 2018 focal plane., Comment: 13 pages, 11 figures
Published: 2018
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17. Design and characterization of the SPT-3G receiver

Author: Sobrin, J. A., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cliche, J. F., Cukierman, A., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gallichio, J., Gilbert, A., Groh, J. C., Guns, S. T., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Stark, A. A., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract: The SPT-3G receiver was commissioned in early 2017 on the 10-meter South Pole Telescope (SPT) to map anisotropies in the cosmic microwave background (CMB). New optics, detector, and readout technologies have yielded a multichroic, high-resolution, low-noise camera with impressive throughput and sensitivity, offering the potential to improve our understanding of inflationary physics, astroparticle physics, and growth of structure. We highlight several key features and design principles of the new receiver, and summarize its performance to date., Comment: Conference Presentation at SPIE Astronomical Telescopes + Instrumentation 2018, conference 10708
Published: 2018
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18. Broadband anti-reflective coatings for cosmic microwave background experiments

Author: Nadolski, A., Kofman, A. M., Vieira, J. D., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cliche, J. F., Cukierman, A., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Fu, J., Gallicchio, J., Gilbert, A., Groh, J. C., Guns, S. T., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C. -L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vanderlinde, K., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Subjects: Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
Abstract: The desire for higher sensitivity has driven ground-based cosmic microwave background (CMB) experiments to employ ever larger focal planes, which in turn require larger reimaging optics. Practical limits to the maximum size of these optics motivates the development of quasi-optically-coupled (lenslet-coupled), multi-chroic detectors. These detectors can be sensitive across a broader bandwidth compared to waveguide-coupled detectors. However, the increase in bandwidth comes at a cost: the lenses (up to $\sim$700 mm diameter) and lenslets ($\sim$5 mm diameter, hemispherical lenses on the focal plane) used in these systems are made from high-refractive-index materials (such as silicon or amorphous aluminum oxide) that reflect nearly a third of the incident radiation. In order to maximize the faint CMB signal that reaches the detectors, the lenses and lenslets must be coated with an anti-reflective (AR) material. The AR coating must maximize radiation transmission in scientifically interesting bands and be cryogenically stable. Such a coating was developed for the third generation camera, SPT-3G, of the South Pole Telescope (SPT) experiment, but the materials and techniques used in the development are general to AR coatings for mm-wave optics. The three-layer polytetrafluoroethylene-based AR coating is broadband, inexpensive, and can be manufactured with simple tools. The coating is field tested; AR coated focal plane elements were deployed in the 2016-2017 austral summer and AR coated reimaging optics were deployed in 2017-2018., Comment: 13 pages, 5 figures
Published: 2018
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19. Measurement of gravitational lensing of the cosmic microwave background using SPT-3G 2018 data

Author: Pan, Z., primary, Bianchini, F., additional, Wu, W. L. K., additional, Ade, P. A. R., additional, Ahmed, Z., additional, Anderes, E., additional, Anderson, A. J., additional, Ansarinejad, B., additional, Archipley, M., additional, Aylor, K., additional, Balkenhol, L., additional, Barry, P. S., additional, Basu Thakur, R., additional, Benabed, K., additional, Bender, A. N., additional, Benson, B. A., additional, Bleem, L. E., additional, Bouchet, F. R., additional, Bryant, L., additional, Byrum, K., additional, Camphuis, E., additional, Carlstrom, J. E., additional, Carter, F. W., additional, Cecil, T. W., additional, Chang, C. L., additional, Chaubal, P., additional, Chen, G., additional, Chichura, P. M., additional, Cho, H.-M., additional, Chou, T.-L., additional, Cliche, J.-F., additional, Coerver, A., additional, Crawford, T. M., additional, Cukierman, A., additional, Daley, C., additional, de Haan, T., additional, Denison, E. V., additional, Dibert, K. R., additional, Ding, J., additional, Dobbs, M. A., additional, Doussot, A., additional, Dutcher, D., additional, Everett, W., additional, Feng, C., additional, Ferguson, K. R., additional, Fichman, K., additional, Foster, A., additional, Fu, J., additional, Galli, S., additional, Gambrel, A. E., additional, Gardner, R. W., additional, Ge, F., additional, Goeckner-Wald, N., additional, Gualtieri, R., additional, Guidi, F., additional, Guns, S., additional, Gupta, N., additional, Halverson, N. W., additional, Harke-Hosemann, A. H., additional, Harrington, N. L., additional, Henning, J. W., additional, Hilton, G. C., additional, Hivon, E., additional, Holder, G. P., additional, Holzapfel, W. L., additional, Hood, J. C., additional, Howe, D., additional, Huang, N., additional, Irwin, K. D., additional, Jeong, O., additional, Jonas, M., additional, Jones, A., additional, Kéruzoré, F., additional, Khaire, T. S., additional, Knox, L., additional, Kofman, A. M., additional, Korman, M., additional, Kubik, D. L., additional, Kuhlmann, S., additional, Kuo, C.-L., additional, Lee, A. T., additional, Leitch, E. M., additional, Levy, K., additional, Lowitz, A. E., additional, Lu, C., additional, Maniyar, A., additional, Menanteau, F., additional, Meyer, S. S., additional, Michalik, D., additional, Millea, M., additional, Montgomery, J., additional, Nadolski, A., additional, Nakato, Y., additional, Natoli, T., additional, Nguyen, H., additional, Noble, G. I., additional, Novosad, V., additional, Omori, Y., additional, Padin, S., additional, Paschos, P., additional, Pearson, J., additional, Posada, C. M., additional, Prabhu, K., additional, Quan, W., additional, Raghunathan, S., additional, Rahimi, M., additional, Rahlin, A., additional, Reichardt, C. L., additional, Riebel, D., additional, Riedel, B., additional, Ruhl, J. E., additional, Sayre, J. T., additional, Schiappucci, E., additional, Shirokoff, E., additional, Smecher, G., additional, Sobrin, J. A., additional, Stark, A. A., additional, Stephen, J., additional, Story, K. T., additional, Suzuki, A., additional, Takakura, S., additional, Tandoi, C., additional, Thompson, K. L., additional, Thorne, B., additional, Trendafilova, C., additional, Tucker, C., additional, Umilta, C., additional, Vale, L. R., additional, Vanderlinde, K., additional, Vieira, J. D., additional, Wang, G., additional, Whitehorn, N., additional, Yefremenko, V., additional, Yoon, K. W., additional, Young, M. R., additional, and Zebrowski, J. A., additional
Published: 2023
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20. Performance of Al–Mn Transition-Edge Sensor Bolometers in SPT-3G

Author: Anderson, A. J., Ade, P. A. R., Ahmed, Z., Avva, J. S., Barry, P. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cho, H.-M., Cliche, J. F., Cukierman, A., de Haan, T., Denison, E. V., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Ferguson, K. R., Foster, A., Fu, J., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Gilbert, A., Groh, J. C., Guns, S. T., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C.-L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2020
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21. On-Sky Performance of the SPT-3G Frequency-Domain Multiplexed Readout

Author: Bender, A. N., Anderson, A. J., Avva, J. S., Ade, P. A. R., Ahmed, Z., Barry, P. S., Basu Thakur, R., Benson, B. A., Bryant, L., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T. W., Chang, C. L., Cho, H.-M., Cliche, J. F., Cukierman, A., de Haan, T., Denison, E. V., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Ferguson, K. R., Foster, A., Fu, J., Gallicchio, J., Gambrel, A. E., Gardner, R. W., Gilbert, A., Groh, J. C., Guns, S., Guyser, R., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Howe, D., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Jones, A., Khaire, T. S., Kofman, A. M., Korman, M., Kubik, D. L., Kuhlmann, S., Kuo, C.-L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Paschos, P., Pearson, J., Posada, C. M., Quan, W., Rahlin, A., Riebel, D., Ruhl, J. E., Sayre, J. T., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Stephen, J., Story, K. T., Suzuki, A., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2020
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22. Thermal Links and Microstrip Transmission Lines in SPT-3G Bolometers

Author: Ding, J., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Divan, R., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Miller, C. S., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stan, L., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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23. Tuning SPT-3G Transition-Edge-Sensor Electrical Properties with a Four-Layer Ti–Au–Ti–Au Thin-Film Stack

Author: Carter, F. W., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Divan, R., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Kutepova, V., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Miller, C. S., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stan, L., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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24. SPT-3G: A Multichroic Receiver for the South Pole Telescope

Author: Anderson, A. J., Ade, P. A. R., Ahmed, Z., Austermann, J. E., Avva, J. S., Barry, P. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Bleem, L. E., Byrum, K., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cho, H. M., Cliche, J. F., Crawford, T. M., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holder, G. P., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Knox, L., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuklev, N., Kuo, C. L., Lee, A. T., Leitch, E. M., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Reichardt, C. L., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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25. Impact of Electrical Contacts Design and Materials on the Stability of Ti Superconducting Transition Shape

Author: Yefremenko, Volodymyr, Ade, Peter A. R., Ahmed, Zeeshan, Anderson, Adam J., Austermann, Jason E., Avva, Jessica S., Basu Thakur, Robitan, Bender, Amy N., Benson, Bradford A., Carlstrom, John E., Carter, Faustin W., Cecil, Thomas, Chang, Clarence L., Cliche, Jean-Francois, Cukierman, Ariel, Denison, Edward V., de Haan, Tijmen, Ding, Junjia, Divan, Ralu N. S., Dobbs, Matt A., Dutcher, Daniel, Everett, Wenderline, Foster, Allen, Gannon, Renae N., Gilbert, Adam, Groh, John, Halverson, Nils W., Harke-Hosemann, Angelina H., Harrington, Nicholas L., Henning, Jason W., Hilton, Gene C., Holzapfel, William L., Huang, Nicholas, Irwin, Kent D., Jeong, Oliver B., Jonas, Michelle, Khaire, Trupti, Kofman, Anna M., Korman, Milo, Kubik, Donna L., Kuhlmann, Steve, Kuo, Chao-Lin, Lee, Adrian T., Lowitz, Amy E., Meyer, Stephen S., Michalik, Daniel, Miller, Christina Suzanne, Montgomery, Joshua, Nadolski, Andrew, Natoli, Tyler J., Nguyen, Hogan, Noble, Gavin, Novosad, Valentine, Padin, Stephen, Pan, Zhaodi, Pearson, John, Posada, Chrystian M., Rahlin, Alexandra, Ruhl, John E., Saunders, L. J., Sayre, James T., Shirley, Ian, Shirokoff, Erik D., Smecher, Graeme, Sobrin, Joshua A., Stan, Liliana, Stark, Antony A., Story, Kyle T., Suzuki, Aritoki, Tang, Qing Yang, Thompson, Keith L., Tucker, Carole E., Vale, Leila R., Vanderlinde, Keith, Vieira, Joaquin D., Wang, Gensheng, Whitehorn, Nathan, Yoon, Ki Won, and Young, Matt
Published: 2018
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26. Design and Bolometer Characterization of the SPT-3G First-Year Focal Plane

Author: Everett, W., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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27. Fabrication of Detector Arrays for the SPT-3G Receiver

Author: Posada, C. M., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Divan, R., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Miller, C. S., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stan, L., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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28. Optical Characterization of the SPT-3G Camera

Author: Pan, Z., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Avva, J. S., Thakur, R. Basu, Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Michalik, D., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Noble, G. I., Novosad, V., Padin, S., Pearson, J., Posada, C. M., Rahlin, A., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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29. Design and Assembly of SPT-3G Cold Readout Hardware

Author: Avva, J. S., Ade, P. A. R., Ahmed, Z., Anderson, A. J., Austermann, J. E., Thakur, R. Basu, Barron, D., Bender, A. N., Benson, B. A., Carlstrom, J. E., Carter, F. W., Cecil, T., Chang, C. L., Cliche, J. F., Cukierman, A., Denison, E. V., de Haan, T., Ding, J., Dobbs, M. A., Dutcher, D., Elleflot, T., Everett, W., Foster, A., Gannon, R. N., Gilbert, A., Groh, J. C., Halverson, N. W., Harke-Hosemann, A. H., Harrington, N. L., Hasegawa, M., Hattori, K., Henning, J. W., Hilton, G. C., Holzapfel, W. L., Hori, Y., Huang, N., Irwin, K. D., Jeong, O. B., Jonas, M., Khaire, T., Kofman, A. M., Korman, M., Kubik, D., Kuhlmann, S., Kuo, C. L., Lee, A. T., Lowitz, A. E., Meyer, S. S., Montgomery, J., Nadolski, A., Natoli, T., Nguyen, H., Nishino, H., Noble, G. I., Novosad, V., Padin, S., Pan, Z., Pearson, J., Posada, C. M., Rahlin, A., Rotermund, K., Ruhl, J. E., Saunders, L. J., Sayre, J. T., Shirley, I., Shirokoff, E., Smecher, G., Sobrin, J. A., Stark, A. A., Story, K. T., Suzuki, A., Tang, Q. Y., Thompson, K. L., Tucker, C., Vale, L. R., Vanderlinde, K., Vieira, J. D., Wang, G., Whitehorn, N., Yefremenko, V., Yoon, K. W., and Young, M. R.
Published: 2018
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30. Measurement of gravitational lensing of the cosmic microwave background using SPT-3G 2018 data

Author: Pan, Z, Bianchini, F, Wu, WLK, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Ansarinejad, B, Archipley, M, Aylor, K, Balkenhol, L, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Camphuis, E, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Chichura, PM, Cho, H-M, Chou, T-L, Cliche, J-F, Coerver, A, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, EV, Dibert, KR, Ding, J, Dobbs, MA, Doussot, A, Dutcher, D, Everett, W, Feng, C, Ferguson, KR, Fichman, K, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Ge, F, Goeckner-Wald, N, Gualtieri, R, Guidi, F, Guns, S, Gupta, N, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, O, Jonas, M, Jones, A, Keruzore, F, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Levy, K, Lowitz, AE, Lu, C, Maniyar, A, Menanteau, F, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Nakato, Y, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Raghunathan, S, Rahimi, M, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Takakura, S, Tandoi, C, Thompson, KL, Thorne, B, Trendafilova, C, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Yefremenko, V, Yoon, KW, Young, MR, Zebrowski, JA, Pan, Z, Bianchini, F, Wu, WLK, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Ansarinejad, B, Archipley, M, Aylor, K, Balkenhol, L, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Camphuis, E, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Chichura, PM, Cho, H-M, Chou, T-L, Cliche, J-F, Coerver, A, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, EV, Dibert, KR, Ding, J, Dobbs, MA, Doussot, A, Dutcher, D, Everett, W, Feng, C, Ferguson, KR, Fichman, K, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Ge, F, Goeckner-Wald, N, Gualtieri, R, Guidi, F, Guns, S, Gupta, N, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, O, Jonas, M, Jones, A, Keruzore, F, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Levy, K, Lowitz, AE, Lu, C, Maniyar, A, Menanteau, F, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Nakato, Y, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Raghunathan, S, Rahimi, M, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Takakura, S, Tandoi, C, Thompson, KL, Thorne, B, Trendafilova, C, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Yefremenko, V, Yoon, KW, Young, MR, and Zebrowski, JA
Published: 2023

31. Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope

Author: Chichura, P. M., primary, Foster, A., additional, Patel, C., additional, Ossa-Jaen, N., additional, Ade, P. A. R., additional, Ahmed, Z., additional, Anderson, A. J., additional, Archipley, M., additional, Austermann, J. E., additional, Avva, J. S., additional, Balkenhol, L., additional, Barry, P. S., additional, Thakur, R. Basu, additional, Beall, J. A., additional, Benabed, K., additional, Bender, A. N., additional, Benson, B. A., additional, Bianchini, F., additional, Bleem, L. E., additional, Bouchet, F. R., additional, Bryant, L., additional, Byrum, K., additional, Carlstrom, J. E., additional, Carter, F. W., additional, Cecil, T. W., additional, Chang, C. L., additional, Chaubal, P., additional, Chen, G., additional, Chiang, H. C., additional, Cho, H.-M., additional, Chou, T-L., additional, Citron, R., additional, Cliche, J.-F., additional, Crawford, T. M., additional, Crites, A. T., additional, Cukierman, A., additional, Daley, C. M., additional, Denison, E. V., additional, Dibert, K., additional, Ding, J., additional, Dobbs, M. A., additional, Dutcher, D., additional, Everett, W., additional, Feng, C., additional, Ferguson, K. R., additional, Fu, J., additional, Galli, S., additional, Gallicchio, J., additional, Gambrel, A. E., additional, Gardner, R. W., additional, George, E. M., additional, Goeckner-Wald, N., additional, Gualtieri, R., additional, Guns, S., additional, Gupta, N., additional, Guyser, R., additional, Haan, T. de, additional, Halverson, N. W., additional, Harke-Hosemann, A. H., additional, Harrington, N. L., additional, Henning, J. W., additional, Hilton, G. C., additional, Hivon, E., additional, Holder, G. P., additional, Holzapfel, W. L., additional, Hood, J. C., additional, Howe, D., additional, Hrubes, J. D., additional, Huang, N., additional, Hubmayr, J., additional, Irwin, K. D., additional, Jeong, O. B., additional, Jonas, M., additional, Jones, A., additional, Khaire, T. S., additional, Knox, L., additional, Kofman, A. M., additional, Korman, M., additional, Kubik, D. L., additional, Kuhlmann, S., additional, Kuo, C.-L., additional, Lee, A. T., additional, Leitch, E. M., additional, Li, D., additional, Lowitz, A., additional, Lu, C., additional, Marrone, D. P., additional, McMahon, J. J., additional, Meyer, S. S., additional, Michalik, D., additional, Millea, M., additional, Mocanu, L. M., additional, Montgomery, J., additional, Moran, C. Corbett, additional, Nadolski, A., additional, Natoli, T., additional, Nguyen, H., additional, Nibarger, J. P., additional, Noble, G., additional, Novosad, V., additional, Omori, Y., additional, Padin, S., additional, Pan, Z., additional, Paschos, P., additional, Patil, S., additional, Pearson, J., additional, Phadke, K. A., additional, Posada, C. M., additional, Prabhu, K., additional, Pryke, C., additional, Quan, W., additional, Rahlin, A., additional, Reichardt, C. L., additional, Riebel, D., additional, Riedel, B., additional, Rouble, M., additional, Ruhl, J. E., additional, Saliwanchik, B. R., additional, Sayre, J. T., additional, Schaffer, K. K., additional, Schiappucci, E., additional, Shirokoff, E., additional, Sievers, C., additional, Smecher, G., additional, Sobrin, J. A., additional, Springmann, A., additional, Stark, A. A., additional, Stephen, J., additional, Story, K. T., additional, Suzuki, A., additional, Tandoi, C., additional, Thompson, K. L., additional, Thorne, B., additional, Tucker, C., additional, Umilta, C., additional, Vale, L. R., additional, Veach, T., additional, Vieira, J. D., additional, Wang, G., additional, Whitehorn, N., additional, Wu, W. L. K., additional, Yefremenko, V., additional, Yoon, K. W., additional, and Young, M. R., additional
Published: 2022
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32. Thermal Conductance of Superconducting and Dielectric Layers on TES Bolometer Legs

Author: Angelina H. Harke-Hosemann, Joel Ullom, Peter Lowell, Kelsey Morgan, Johannes Hubmayr, Gene Hilton, and Shannon Duff
Published: 2022

33. Thermal Conductance of Superconducting and Dielectric Layers on TES Bolometer Legs

Author: Harke-Hosemann, Angelina H., primary, Ullom, Joel, additional, Lowell, Peter, additional, Morgan, Kelsey, additional, Hubmayr, Johannes, additional, Hilton, Gene, additional, and Duff, Shannon, additional
Published: 2022
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34. Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model

Author: Montgomery, J, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, MA, Avva, JS, Aylor, K, Balkenhol, L, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, AJ, Daley, CM, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Dutcher, D, Elleflot, T, Everett, WB, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Groh, JC, Gualtieri, R, Guns, ST, Gupta, N, Guyser, RJ, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, EF, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, SE, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Nadolski, A, Natoli, TJ, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, JE, Posada, CM, Prabhu, K, Quan, W, Rahlin, AS, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, GM, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, CE, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, VG, Yoon, KW, Young, MR, Montgomery, J, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, MA, Avva, JS, Aylor, K, Balkenhol, L, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, AJ, Daley, CM, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Dutcher, D, Elleflot, T, Everett, WB, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Groh, JC, Gualtieri, R, Guns, ST, Gupta, N, Guyser, RJ, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, EF, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, SE, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Nadolski, A, Natoli, TJ, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, JE, Posada, CM, Prabhu, K, Quan, W, Rahlin, AS, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, GM, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, CE, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, VG, Yoon, KW, and Young, MR
Abstract: The third-generation South Pole Telescope camera (SPT-3G) improves upon its predecessor (SPTpol) by an order of magnitude increase in detectors on the focal plane. The technology used to read out and control these detectors, digital frequency-domain multiplexing (DfMUX), is conceptually the same as used for SPTpol, but extended to accommodate more detectors. A nearly 5× expansion in the readout operating bandwidth has enabled the use of this large focal plane, and SPT-3G performance meets the forecasting targets relevant to its science objectives. However, the electrical dynamics of the higher-bandwidth readout differ from predictions based on models of the SPTpol system due to the higher frequencies used and parasitic impedances associated with new cryogenic electronic architecture. To address this, we present an updated derivation for electrical crosstalk in higher-bandwidth DfMUX systems and identify two previously uncharacterized contributions to readout noise, which become dominant at high bias frequency. The updated crosstalk and noise models successfully describe the measured crosstalk and readout noise performance of SPT-3G. These results also suggest specific changes to warm electronics component values, wire-harness properties, and SQUID parameters, to improve the readout system for future experiments using DfMUX, such as the LiteBIRD space telescope.
Published: 2022

35. On-Sky Performance of the SPT-3G Frequency-Domain Multiplexed Readout

Author: J. A. Sobrin, Thomas Cecil, E. V. Denison, S. S. Meyer, Kent D. Irwin, Peter A. R. Ade, W. L. Holzapfel, K. T. Story, K. Vanderlinde, A. E. Lowitz, V. Novosad, Donna Kubik, Aled Jones, John E. Carlstrom, G. I. Noble, Lincoln Bryant, Jason W. Henning, T. de Haan, Ki Won Yoon, Volodymyr Yefremenko, Nathan Whitehorn, Zeeshan Ahmed, T. Natoli, N. L. Harrington, Gene C. Hilton, Robert Gardner, Amy N. Bender, Carole Tucker, Jason Gallicchio, E. M. Leitch, C. L. Chang, A. E. Gambrel, W. B. Everett, A. Foster, Adrian T. Lee, D. Howe, D. Dutcher, Antony A. Stark, M. Jonas, Aritoki Suzuki, J. E. Ruhl, J. Stephen, Trupti Khaire, D. Riebel, Bradford Benson, J. F. Cliche, Joshua Montgomery, H. M. Cho, Ari Cukierman, Graeme Smecher, Z. Pan, Alexandra S. Rahlin, R. Basu Thakur, Matt Dobbs, K. R. Ferguson, Faustin Carter, Andrew Nadolski, Junjia Ding, Adam Anderson, M. R. Young, N. W. Halverson, Leila R. Vale, Oliver Jeong, Chao-Lin Kuo, Keith L. Thompson, John Groh, Karen Byrum, John E. Pearson, P. Paschos, N. Huang, A. Gilbert, J. Fu, A. M. Kofman, Jessica Avva, R. Guyser, Stephen Padin, C. M. Posada, Steve Kuhlmann, Joaquin Vieira, S. Guns, Daniel Michalik, Gensheng Wang, W. Quan, Erik Shirokoff, Peter S. Barry, A. H. Harke-Hosemann, H. T. Nguyen, M. Korman, and J. T. Sayre
Subjects: Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Multiplexing, Noise (electronics), 010305 fluids & plasmas, law.invention, Optics, law, 0103 physical sciences, General Materials Science, 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, business.industry, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), White noise, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, South Pole Telescope, Frequency domain, Transition edge sensor, Astrophysics - Instrumentation and Methods for Astrophysics, business, Voltage
Abstract: Frequency-domain multiplexing (fMux) is an established technique for the readout of large arrays of transition edge sensor (TES) bolometers. Each TES in a multiplexing module has a unique AC voltage bias that is selected by a resonant filter. This scheme enables the operation and readout of multiple bolometers on a single pair of wires, reducing thermal loading onto sub-Kelvin stages. The current receiver on the South Pole Telescope, SPT-3G, uses a 68x fMux system to operate its large-format camera of $\sim$16,000 TES bolometers. We present here the successful implementation and performance of the SPT-3G readout as measured on-sky. Characterization of the noise reveals a median pair-differenced 1/f knee frequency of 33 mHz, indicating that low-frequency noise in the readout will not limit SPT-3G's measurements of sky power on large angular scales. Measurements also show that the median readout white noise level in each of the SPT-3G observing bands is below the expectation for photon noise, demonstrating that SPT-3G is operating in the photon-noise-dominated regime., Comment: 9 pages, 5 figures submitted to the Journal of Low Temperature Physics: LTD18 Special Edition
Published: 2019

36. Performance and characterization of the SPT-3G digital frequency-domain multiplexed readout system using an improved noise and crosstalk model

Author: Montgomery, Joshua, primary, Ade, Peter A. R., additional, Ahmed, Zeeshan, additional, Anderes, Ethan, additional, Anderson, Adam J., additional, Archipley, Melanie, additional, Avva, Jessica S., additional, Aylor, Kevin, additional, Balkenhol, Lennart, additional, Barry, Peter S., additional, Thakur, Ritoban B., additional, Benabed, Karim, additional, Bender, Amy N., additional, Benson, Bradford A., additional, Bianchini, Federico, additional, Bleem, Lindsey E., additional, Bouchet, Francois R., additional, Bryant, Lincoln, additional, Byrum, Karen, additional, Carlstrom, John E., additional, Carter, Faustin W., additional, Cecil, Thomas W., additional, Chang, Clarence L., additional, Chaubal, Prakrut, additional, Chen, Geoffrey, additional, Cho, Hsiaomei, additional, Chou, Ti-Lin, additional, Cliche, Jean-Francois, additional, Crawford, Tom M., additional, Cukierman, Ari, additional, Daley, Cail, additional, de Haan, Tijmen, additional, Denison, Edward V., additional, Dibert, Karia, additional, Ding, Junjia, additional, Dobbs, Matt A., additional, Dutcher, Daniel, additional, Elleflot, Tucker, additional, Everett, Wendeline, additional, Feng, Cahng, additional, Ferguson, Kyle R., additional, Foster, Allen, additional, Fu, Jianyang, additional, Galli, Silvia, additional, Gambrel, Anne E., additional, Gardner, Robert W., additional, Goeckner-Wald, Neil, additional, Groh, John C., additional, Gualtieri, Riccardo, additional, Guns, Sam, additional, Gupta, Nikhel, additional, Guyser, Robert, additional, Halverson, Nils W., additional, Harke-Hosemann, Angelina H., additional, Harrington, Nicholas L., additional, Henning, Jason W., additional, Hilton, Gene C., additional, Hivon, Eric, additional, Holzapfel, William L., additional, Hood, John C., additional, Howe, Doug, additional, Huang, Nicholas, additional, Irwin, Kent D., additional, Jeong, Oliver B., additional, Jonas, Michelle, additional, Jones, Adam, additional, Khaire, Trupti S., additional, Knox, Lloyd, additional, Kofman, Anna M., additional, Korman, Milo, additional, Kubik, Donna L., additional, Kuhlmann, Stephen, additional, Kuo, Chao-Lin, additional, Lee, Adrian T., additional, Leitch, Erik M., additional, Lowitz, Amy E., additional, Lu, Chunyu, additional, Meyer, Stephan S., additional, Michalik, Daniel, additional, Millea, Marius, additional, Nadolski, Andrew, additional, Natoli, Tyler, additional, Nguyen, Hogan, additional, Noble, Gavin I., additional, Novosad, Valentine, additional, Omori, Yuuki, additional, Padin, Steve, additional, Pan, Zhaodi, additional, Paschos, Pascal, additional, Pearson, John, additional, Posada, Chrystian M., additional, Prabhu, Karthik, additional, Quan, Wei, additional, Rahlin, Alexandra, additional, Reichardt, Christian L., additional, Riebel, David, additional, Riedel, Benedikt, additional, Rouble, Maclean, additional, Ruhl, John E., additional, Sayre, James T., additional, Schiappucci, Eduardo, additional, Shirokoff, Erik, additional, Smecher, Graeme, additional, Sobrin, Joshua A., additional, Stark, Antony A., additional, Stephen, Judith, additional, Story, Kyle T., additional, Suzuki, Aritoki, additional, Thompson, Keith L., additional, Thorne, Ben, additional, Tucker, Carole, additional, Umilta, Caterina, additional, Vale, Leila R., additional, Vanderlinde, Keith, additional, Vieira, Joaquin D., additional, Wang, Gensheng, additional, Whitehorn, Nathan, additional, Wu, Wai L. K., additional, Yefremenko, Volodymyr, additional, Yoon, Ki W., additional, and Young, Matt R., additional
Published: 2022
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37. Asteroid Measurements at Millimeter Wavelengths with the South Pole Telescope

Author: P. M. Chichura, A. Foster, C. Patel, N. Ossa-Jaen, P. A. R. Ade, Z. Ahmed, A. J. Anderson, M. Archipley, J. E. Austermann, J. S. Avva, L. Balkenhol, P. S. Barry, R. Basu Thakur, J. A. Beall, K. Benabed, A. N. Bender, B. A. Benson, F. Bianchini, L. E. Bleem, F. R. Bouchet, L. Bryant, K. Byrum, J. E. Carlstrom, F. W. Carter, T. W. Cecil, C. L. Chang, P. Chaubal, G. Chen, H. C. Chiang, H.-M. Cho, T-L. Chou, R. Citron, J.-F. Cliche, T. M. Crawford, A. T. Crites, A. Cukierman, C. M. Daley, E. V. Denison, K. Dibert, J. Ding, M. A. Dobbs, D. Dutcher, W. Everett, C. Feng, K. R. Ferguson, J. Fu, S. Galli, J. Gallicchio, A. E. Gambrel, R. W. Gardner, E. M. George, N. Goeckner-Wald, R. Gualtieri, S. Guns, N. Gupta, R. Guyser, T. de Haan, N. W. Halverson, A. H. Harke-Hosemann, N. L. Harrington, J. W. Henning, G. C. Hilton, E. Hivon, G. P. Holder, W. L. Holzapfel, J. C. Hood, D. Howe, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, O. B. Jeong, M. Jonas, A. Jones, T. S. Khaire, L. Knox, A. M. Kofman, M. Korman, D. L. Kubik, S. Kuhlmann, C.-L. Kuo, A. T. Lee, E. M. Leitch, D. Li, A. Lowitz, C. Lu, D. P. Marrone, J. J. McMahon, S. S. Meyer, D. Michalik, M. Millea, L. M. Mocanu, J. Montgomery, C. Corbett Moran, A. Nadolski, T. Natoli, H. Nguyen, J. P. Nibarger, G. Noble, V. Novosad, Y. Omori, S. Padin, Z. Pan, P. Paschos, S. Patil, J. Pearson, K. A. Phadke, C. M. Posada, K. Prabhu, C. Pryke, W. Quan, A. Rahlin, C. L. Reichardt, D. Riebel, B. Riedel, M. Rouble, J. E. Ruhl, B. R. Saliwanchik, J. T. Sayre, K. K. Schaffer, E. Schiappucci, E. Shirokoff, C. Sievers, G. Smecher, J. A. Sobrin, A. Springmann, A. A. Stark, J. Stephen, K. T. Story, A. Suzuki, C. Tandoi, K. L. Thompson, B. Thorne, C. Tucker, C. Umilta, L. R. Vale, T. Veach, J. D. Vieira, G. Wang, N. Whitehorn, W. L. K. Wu, V. Yefremenko, K. W. Yoon, and M. R. Young
Subjects: Earth and Planetary Astrophysics (astro-ph.EP), Space and Planetary Science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics - Earth and Planetary Astrophysics
Abstract: We present the first measurements of asteroids in millimeter wavelength (mm) data from the South Pole Telescope (SPT), which is used primarily to study the cosmic microwave background (CMB). We analyze maps of two $\sim270$ deg$^2$ sky regions near the ecliptic plane, each observed with the SPTpol camera $\sim100$ times over one month. We subtract the mean of all maps of a given field, removing static sky signal, and then average the mean-subtracted maps at known asteroid locations. We detect three asteroids$\text{ -- }$(324) Bamberga, (13) Egeria, and (22) Kalliope$\text{ -- }$with signal-to-noise ratios (S/N) of 11.2, 10.4, and 6.1, respectively, at 2.0 mm (150 GHz); we also detect (324) Bamberga with S/N of 4.1 at 3.2 mm (95 GHz). We place constraints on these asteroids' effective emissivities, brightness temperatures, and light curve modulation amplitude. Our flux density measurements of (324) Bamberga and (13) Egeria roughly agree with predictions, while our measurements of (22) Kalliope suggest lower flux, corresponding to effective emissivities of $0.66 \pm 0.11$ at 2.0 mm and $, 21 pages, 9 figures
Published: 2022

38. Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data

Author: Faustin Carter, S. E. Kuhlmann, Junjia Ding, Gene C. Hilton, J. C. Hood, A. T. Lee, M. Millea, Erik Shirokoff, Oliver Jeong, N. W. Halverson, Thomas Cecil, John E. Pearson, G. I. Noble, John E. Carlstrom, E. V. Denison, B. Thorne, K. Prabhu, C. L. Kuo, François R. Bouchet, M. Korman, Federico Bianchini, K. Dibert, S. Padin, Ethan Anderes, Neil Goeckner-Wald, D. Riebel, J. E. Ruhl, Jason W. Henning, Nikhel Gupta, N. Huang, M. Rouble, M. Jonas, RB Thakur, K. L. Thompson, J. T. Sayre, C. Tucker, A. A. Stark, A. Lowitz, M. A. Dobbs, N. L. Harrington, Z. Pan, Karen Byrum, A. H. Harke-Hosemann, C. Lu, Srinivasan Raghunathan, B. Riedel, C. L. Chang, A. Cukierman, Andreas Bender, Z. Ahmed, K. Aylor, E. M. Leitch, Alexandra S. Rahlin, S. Guns, J. A. Sobrin, K. W. Yoon, D. Howe, P. Chaubal, Young, Graeme Smecher, C. Umilta, J. F. Cliche, T. de Haan, Silvia Galli, H. Nguyen, Lloyd Knox, T. Natoli, K. Vanderlinde, T. M. Crawford, J. Fu, P. Paschos, S. S. Meyer, Christian L. Reichardt, H-M. Cho, L. R. Vale, A. Foster, K. T. Story, Karim Benabed, E. Hivon, E. Schiappucci, Anthony P. Jones, Andrew Nadolski, Lindsey Bleem, Jessica Avva, Peter S. Barry, L. Balkenhol, Bradford Benson, Yefremenko, R. Guyser, R. Gualtieri, C. M. Posada, Chang Feng, G. P. Holder, A. M. Kofman, Daniel Michalik, Novosad, J. D. Vieira, C. Daley, Gensheng Wang, W. L. Holzapfel, W. Quan, K. R. Ferguson, Adam Anderson, Gang Chen, Nathan Whitehorn, Robert Gardner, M. Archipley, Y. Omori, A. Suzuki, Lincoln Bryant, D. Dutcher, T.-L. Chou, Trupti Khaire, Joshua Montgomery, J. Stephen, A. E. Gambrel, Kent D. Irwin, W. L. K. Wu, Donna Kubik, P. A. R. Ade, and W. B. Everett
Subjects: Physics, 010308 nuclear & particles physics, Cosmic microwave background, Spectral density, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, Parameter space, 01 natural sciences, 7. Clean energy, symbols.namesake, Amplitude, Gravitational lens, South Pole Telescope, 0103 physical sciences, symbols, Planck, Multipole expansion, 010303 astronomy & astrophysics
Abstract: We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power spectrum of the cosmic microwave background using data collected by SPT-3G, the latest instrument installed on the South Pole Telescope. This analysis uses observations of a 1500 deg$^2$ region at 95, 150, and 220 GHz taken over a four month period in 2018. We report binned values of the $EE$ and $TE$ power spectra over the angular multipole range $300 \le \ell < 3000$, using the multifrequency data to construct six semi-independent estimates of each power spectrum and their minimum-variance combination. These measurements improve upon the previous results of SPTpol across the multipole ranges $300 \le \ell \le 1400$ for $EE$ and $300 \le \ell \le 1700$ for $TE$, resulting in constraints on cosmological parameters comparable to those from other current leading ground-based experiments. We find that the SPT-3G dataset is well-fit by a $\Lambda$CDM cosmological model with parameter constraints consistent with those from Planck and SPTpol data. From SPT-3G data alone, we find $H_0 = 68.8 \pm 1.5 \mathrm{km\,s^{-1}\,Mpc^{-1}}$ and $\sigma_8 = 0.789 \pm 0.016$, with a gravitational lensing amplitude consistent with the $\Lambda$CDM prediction ($A_L = 0.98 \pm 0.12$). We combine the SPT-3G and the Planck datasets and obtain joint constraints on the $\Lambda$CDM model. The volume of the 68% confidence region in six-dimensional $\Lambda$CDM parameter space is reduced by a factor of 1.5 compared to Planck-only constraints, with only slight shifts in central values. We note that the results presented here are obtained from data collected during just half of a typical observing season with only part of the focal plane operable, and that the active detector count has since nearly doubled for observations made with SPT-3G after 2018.
Published: 2021

39. The Design and Integrated Performance of SPT-3G

Author: J. A. Sobrin, A. J. Anderson, A. N. Bender, B. A. Benson, D. Dutcher, A. Foster, N. Goeckner-Wald, J. Montgomery, A. Nadolski, A. Rahlin, P. A. R. Ade, Z. Ahmed, E. Anderes, M. Archipley, J. E. Austermann, J. S. Avva, K. Aylor, L. Balkenhol, P. S. Barry, R. Basu Thakur, K. Benabed, F. Bianchini, L. E. Bleem, F. R. Bouchet, L. Bryant, K. Byrum, J. E. Carlstrom, F. W. Carter, T. W. Cecil, C. L. Chang, P. Chaubal, G. Chen, H.-M. Cho, T.-L. Chou, J.-F. Cliche, T. M. Crawford, A. Cukierman, C. Daley, T. de Haan, E. V. Denison, K. Dibert, J. Ding, M. A. Dobbs, W. Everett, C. Feng, K. R. Ferguson, J. Fu, S. Galli, A. E. Gambrel, R. W. Gardner, R. Gualtieri, S. Guns, N. Gupta, R. Guyser, N. W. Halverson, A. H. Harke-Hosemann, N. L. Harrington, J. W. Henning, G. C. Hilton, E. Hivon, G. P. Holder, W. L. Holzapfel, J. C. Hood, D. Howe, N. Huang, K. D. Irwin, O. B. Jeong, M. Jonas, A. Jones, T. S. Khaire, L. Knox, A. M. Kofman, M. Korman, D. L. Kubik, S. Kuhlmann, C.-L. Kuo, A. T. Lee, E. M. Leitch, A. E. Lowitz, C. Lu, S. S. Meyer, D. Michalik, M. Millea, T. Natoli, H. Nguyen, G. I. Noble, V. Novosad, Y. Omori, S. Padin, Z. Pan, P. Paschos, J. Pearson, C. M. Posada, K. Prabhu, W. Quan, C. L. Reichardt, D. Riebel, B. Riedel, M. Rouble, J. E. Ruhl, B. Saliwanchik, J. T. Sayre, E. Schiappucci, E. Shirokoff, G. Smecher, A. A. Stark, J. Stephen, K. T. Story, A. Suzuki, C. Tandoi, K. L. Thompson, B. Thorne, C. Tucker, C. Umilta, L. R. Vale, K. Vanderlinde, J. D. Vieira, G. Wang, N. Whitehorn, W. L. K. Wu, V. Yefremenko, K. W. Yoon, M. R. Young, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and SPT-3G
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO), Space and Planetary Science, Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Astrophysics - Instrumentation and Methods for Astrophysics, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 7. Clean energy, Instrumentation and Methods for Astrophysics (astro-ph.IM), Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract: SPT-3G is the third survey receiver operating on the South Pole Telescope dedicated to high-resolution observations of the cosmic microwave background (CMB). Sensitive measurements of the temperature and polarization anisotropies of the CMB provide a powerful dataset for constraining cosmology. Additionally, CMB surveys with arcminute-scale resolution are capable of detecting galaxy clusters, millimeter-wave bright galaxies, and a variety of transient phenomena. The SPT-3G instrument provides a significant improvement in mapping speed over its predecessors, SPT-SZ and SPTpol. The broadband optics design of the instrument achieves a 430 mm diameter image plane across observing bands of 95 GHz, 150 GHz, and 220 GHz, with 1.2 arcmin FWHM beam response at 150 GHz. In the receiver, this image plane is populated with 2690 dual-polarization, tri-chroic pixels (~16000 detectors) read out using a 68X digital frequency-domain multiplexing readout system. In 2018, SPT-3G began a multiyear survey of 1500 deg$^{2}$ of the southern sky. We summarize the unique optical, cryogenic, detector, and readout technologies employed in SPT-3G, and we report on the integrated performance of the instrument., Comment: 25 pages, 11 figures. Accepted for publication in ApJS
Published: 2021

40. Performance of Al–Mn Transition-Edge Sensor Bolometers in SPT-3G

Author: M. Korman, Kent D. Irwin, W. L. Holzapfel, J. E. Ruhl, H. M. Cho, Ari Cukierman, V. Novosad, Donna Kubik, C. L. Chang, A. E. Gambrel, Alexandra S. Rahlin, Matt Dobbs, K. Vanderlinde, Keith L. Thompson, D. Howe, M. R. Young, Karen Byrum, Thomas Cecil, R. Basu Thakur, Erik Shirokoff, P. Paschos, Aled Jones, Peter A. R. Ade, Zeeshan Ahmed, Amy N. Bender, Ki Won Yoon, A. H. Harke-Hosemann, K. T. Story, A. E. Lowitz, H. T. Nguyen, D. Dutcher, Antony A. Stark, J. A. Sobrin, J. Stephen, Jason Gallicchio, Lincoln Bryant, Jason W. Henning, J. T. Sayre, S. S. Meyer, Volodymyr Yefremenko, Nathan Whitehorn, John E. Pearson, Peter S. Barry, N. L. Harrington, T. Natoli, Andrew Nadolski, Jessica Avva, G. I. Noble, Carole Tucker, R. Guyser, Stephen Padin, Trupti Khaire, N. Huang, A. Foster, Joshua Montgomery, A. Gilbert, C. M. Posada, Bradford Benson, Robert Gardner, J. F. Cliche, Steve Kuhlmann, Gene C. Hilton, Joaquin Vieira, Chao-Lin Kuo, S. Guns, Graeme Smecher, W. B. Everett, N. W. Halverson, Daniel Michalik, Gensheng Wang, John Groh, J. Fu, E. V. Denison, W. Quan, A. M. Kofman, M. Jonas, Leila R. Vale, Adrian T. Lee, Aritoki Suzuki, Faustin Carter, Junjia Ding, John E. Carlstrom, T. de Haan, E. M. Leitch, D. Riebel, Oliver Jeong, Z. Pan, K. R. Ferguson, and Adam Anderson
Subjects: Physics - Instrumentation and Detectors, Materials science, Physics::Instrumentation and Detectors, Cosmic microwave background, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Multiplexing, 010305 fluids & plasmas, law.invention, Optics, law, 0103 physical sciences, General Materials Science, Wafer, 010306 general physics, Anisotropy, Instrumentation and Methods for Astrophysics (astro-ph.IM), business.industry, Detector, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Instrumentation and Detectors (physics.ins-det), Condensed Matter Physics, Atomic and Molecular Physics, and Optics, South Pole Telescope, Transition edge sensor, Astrophysics - Instrumentation and Methods for Astrophysics, business
Abstract: SPT-3G is a polarization-sensitive receiver, installed on the South Pole Telescope, that measures the anisotropy of the cosmic microwave background (CMB) from degree to arcminute scales. The receiver consists of ten 150~mm-diameter detector wafers, containing a total of 16,000 transition-edge sensor (TES) bolometers observing at 95, 150, and 220 GHz. During the 2018-2019 austral summer, one of these detector wafers was replaced by a new wafer fabricated with Al-Mn TESs instead of the Ti/Au design originally deployed for SPT-3G. We present the results of in-lab characterization and on-sky performance of this Al-Mn wafer, including electrical and thermal properties, optical efficiency measurements, and noise-equivalent temperature. In addition, we discuss and account for several calibration-related systematic errors that affect measurements made using frequency-domain multiplexing readout electronics., Comment: 9 pages, 5 figures, submitted to the Journal of Low Temperature Physics: LTD18 Special Edition
Published: 2019

41. Detection of Galactic and Extragalactic Millimeter-wavelength Transient Sources with SPT-3G

Author: Guns, S., primary, Foster, A., additional, Daley, C., additional, Rahlin, A., additional, Whitehorn, N., additional, Ade, P. A. R., additional, Ahmed, Z., additional, Anderes, E., additional, Anderson, A. J., additional, Archipley, M., additional, Avva, J. S., additional, Aylor, K., additional, Balkenhol, L., additional, Barry, P. S., additional, Basu Thakur, R., additional, Benabed, K., additional, Bender, A. N., additional, Benson, B. A., additional, Bianchini, F., additional, Bleem, L. E., additional, Bouchet, F. R., additional, Bryant, L., additional, Byrum, K., additional, Carlstrom, J. E., additional, Carter, F. W., additional, Cecil, T. W., additional, Chang, C. L., additional, Chaubal, P., additional, Chen, G., additional, Cho, H.-M., additional, Chou, T.-L., additional, Cliche, J.-F., additional, Crawford, T. M., additional, Cukierman, A., additional, de Haan, T., additional, Denison, E. V., additional, Dibert, K., additional, Ding, J., additional, Dobbs, M. A., additional, Dutcher, D., additional, Everett, W., additional, Feng, C., additional, Ferguson, K. R., additional, Fu, J., additional, Galli, S., additional, Gambrel, A. E., additional, Gardner, R. W., additional, Goeckner-Wald, N., additional, Gualtieri, R., additional, Gupta, N., additional, Guyser, R., additional, Halverson, N. W., additional, Harke-Hosemann, A. H., additional, Harrington, N. L., additional, Henning, J. W., additional, Hilton, G. C., additional, Hivon, E., additional, Holder, G. P., additional, Holzapfel, W. L., additional, Hood, J. C., additional, Howe, D., additional, Huang, N., additional, Irwin, K. D., additional, Jeong, O. B., additional, Jonas, M., additional, Jones, A., additional, Khaire, T. S., additional, Knox, L., additional, Kofman, A. M., additional, Korman, M., additional, Kubik, D. L., additional, Kuhlmann, S., additional, Kuo, C.-L., additional, Lee, A. T., additional, Leitch, E. M., additional, Lowitz, A. E., additional, Lu, C., additional, Marrone, D. P., additional, Meyer, S. S., additional, Michalik, D., additional, Millea, M., additional, Montgomery, J., additional, Nadolski, A., additional, Natoli, T., additional, Nguyen, H., additional, Noble, G. I., additional, Novosad, V., additional, Omori, Y., additional, Padin, S., additional, Pan, Z., additional, Paschos, P., additional, Pearson, J., additional, Phadke, K. A., additional, Posada, C. M., additional, Prabhu, K., additional, Quan, W., additional, Reichardt, C. L., additional, Riebel, D., additional, Riedel, B., additional, Rouble, M., additional, Ruhl, J. E., additional, Sayre, J. T., additional, Schiappucci, E., additional, Shirokoff, E., additional, Smecher, G., additional, Sobrin, J. A., additional, Stark, A. A., additional, Stephen, J., additional, Story, K. T., additional, Suzuki, A., additional, Thompson, K. L., additional, Thorne, B., additional, Tucker, C., additional, Umilta, C., additional, Vale, L. R., additional, Vieira, J. D., additional, Wang, G., additional, Wu, W. L. K., additional, Yefremenko, V., additional, Yoon, K. W., additional, Young, M. R., additional, and Zhang, L., additional
Published: 2021
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42. Measurements of the E-mode polarization and temperature-E-mode correlation of the CMB from SPT-3G 2018 data

Author: Dutcher, D, Balkenhol, L, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Raghunathan, S, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, V, Yoon, KW, Young, MR, Dutcher, D, Balkenhol, L, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Raghunathan, S, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, V, Yoon, KW, and Young, MR
Published: 2021

43. Constraints on Lambda CDM extensions from the SPT-3G 2018 EE and TE power spectra

Author: Balkenhol, L, Dutcher, D, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, V, Yoon, KW, Young, MR, Balkenhol, L, Dutcher, D, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Barry, PS, Thakur, RB, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, Daley, C, de Haan, T, Denison, E, Dibert, K, Ding, J, Dobbs, MA, Everett, W, Feng, C, Ferguson, KR, Foster, A, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Guns, S, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, G, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Posada, CM, Prabhu, K, Quan, W, Rahlin, A, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vanderlinde, K, Vieira, JD, Wang, G, Whitehorn, N, Wu, WLK, Yefremenko, V, Yoon, KW, and Young, MR
Published: 2021

44. Detection of Galactic and Extragalactic Millimeter-wavelength Transient Sources with SPT-3G

Author: Guns, S, Foster, A, Daley, C, Rahlin, A, Whitehorn, N, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Balkenhol, L, Barry, PS, Basu Thakur, R, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, de Haan, T, Denison, EV, Dibert, K, Ding, J, Dobbs, MA, Dutcher, D, Everett, W, Feng, C, Ferguson, KR, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Marrone, DP, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Phadke, KA, Posada, CM, Prabhu, K, Quan, W, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vieira, JD, Wang, G, Wu, WLK, Yefremenko, V, Yoon, KW, Young, MR, Zhang, L, Guns, S, Foster, A, Daley, C, Rahlin, A, Whitehorn, N, Ade, PAR, Ahmed, Z, Anderes, E, Anderson, AJ, Archipley, M, Avva, JS, Aylor, K, Balkenhol, L, Barry, PS, Basu Thakur, R, Benabed, K, Bender, AN, Benson, BA, Bianchini, F, Bleem, LE, Bouchet, FR, Bryant, L, Byrum, K, Carlstrom, JE, Carter, FW, Cecil, TW, Chang, CL, Chaubal, P, Chen, G, Cho, H-M, Chou, T-L, Cliche, J-F, Crawford, TM, Cukierman, A, de Haan, T, Denison, EV, Dibert, K, Ding, J, Dobbs, MA, Dutcher, D, Everett, W, Feng, C, Ferguson, KR, Fu, J, Galli, S, Gambrel, AE, Gardner, RW, Goeckner-Wald, N, Gualtieri, R, Gupta, N, Guyser, R, Halverson, NW, Harke-Hosemann, AH, Harrington, NL, Henning, JW, Hilton, GC, Hivon, E, Holder, GP, Holzapfel, WL, Hood, JC, Howe, D, Huang, N, Irwin, KD, Jeong, OB, Jonas, M, Jones, A, Khaire, TS, Knox, L, Kofman, AM, Korman, M, Kubik, DL, Kuhlmann, S, Kuo, C-L, Lee, AT, Leitch, EM, Lowitz, AE, Lu, C, Marrone, DP, Meyer, SS, Michalik, D, Millea, M, Montgomery, J, Nadolski, A, Natoli, T, Nguyen, H, Noble, GI, Novosad, V, Omori, Y, Padin, S, Pan, Z, Paschos, P, Pearson, J, Phadke, KA, Posada, CM, Prabhu, K, Quan, W, Reichardt, CL, Riebel, D, Riedel, B, Rouble, M, Ruhl, JE, Sayre, JT, Schiappucci, E, Shirokoff, E, Smecher, G, Sobrin, JA, Stark, AA, Stephen, J, Story, KT, Suzuki, A, Thompson, KL, Thorne, B, Tucker, C, Umilta, C, Vale, LR, Vieira, JD, Wang, G, Wu, WLK, Yefremenko, V, Yoon, KW, Young, MR, and Zhang, L
Abstract: High angular resolution cosmic microwave background experiments provide a unique opportunity to conduct a survey of time-variable sources at millimeter wavelengths, a population that has primarily been understood through follow-up measurements of detections in other bands. Here we report the first results of an astronomical transient survey with the South Pole Telescope (SPT) using the SPT-3G camera to observe 1500 deg2 of the southern sky. The observations took place from 2020 March to November in three bands centered at 95, 150, and 220 GHz. This survey yielded the detection of 15 transient events from sources not previously detected by the SPT. The majority are associated with variable stars of different types, expanding the number of such detected flares by more than a factor of two. The stellar flares are unpolarized and bright, in some cases exceeding 1 Jy, and have durations from a few minutes to several hours. Another population of detected events last for 2–3 weeks and appear to be extragalactic in origin. Though data availability at other wavelengths is limited, we find evidence for concurrent optical activity for two of the stellar flares. Future data from SPT-3G and forthcoming instruments will provide real-time detection of millimeter-wave transients on timescales of minutes to months.
Published: 2021

45. Impact of Electrical Contacts Design and Materials on the Stability of Ti Superconducting Transition Shape

Author: Volodymyr Yefremenko, Trupti Khaire, Joshua Montgomery, A. Cukierman, Stephen S. Meyer, Peter A. R. Ade, Zeeshan Ahmed, K. T. Story, Nathan Whitehorn, Faustin Carter, W. B. Everett, Erik Shirokoff, H. Nguyen, Junjia Ding, G. I. Noble, Gene C. Hilton, Jason E. Austermann, Graeme Smecher, Q. Y. Tang, Carole Tucker, Ralu Divan, M. Korman, A. M. Kofman, Alexandra S. Rahlin, J. A. Sobrin, Adam Anderson, Andrew Nadolski, I. Shirley, N. Huang, A. Gilbert, N. L. Harrington, Amy N. Bender, Ki Won Yoon, D. Dutcher, Antony A. Stark, John E. Carlstrom, Michelle Jonas, Angelina H. Harke-Hosemann, C. S. Miller, N. W. Halverson, Oliver Jeong, Matt Dobbs, Bradford Benson, Z. Pan, A. E. Lowitz, C. L. Chang, Valentine Novosad, Adrian T. Lee, Jean Francois Cliche, Daniel Michalik, K. Vanderlinde, Gensheng Wang, Keith L. Thompson, Jason W. Henning, Kent D. Irwin, W. L. Holzapfel, Donna Kubik, Tijmen de Haan, C. M. Posada, Steve Kuhlmann, Joaquin Vieira, John E. Pearson, Aritoki Suzuki, Thomas Cecil, J. T. Sayre, Liliana Stan, Jessica Avva, Stephen Padin, E. V. Denison, T. Natoli, J. E. Ruhl, Leila R. Vale, Robitan Basu Thakur, L. J. Saunders, A. Foster, Chao-Lin Kuo, John Groh, R. N. Gannon, and M. R. Young
Subjects: Superconductivity, Reproducibility, Materials science, Condensed matter physics, Scanning electron microscope, Bolometer, 02 engineering and technology, 021001 nanoscience & nanotechnology, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Electrical contacts, law.invention, Differential interference contrast microscopy, law, 0103 physical sciences, General Materials Science, Diffusion (business), Transition edge sensor, 010306 general physics, 0210 nano-technology
Abstract: The South Pole Telescope SPT-3G camera utilizes Ti/Au transition edge sensors (TESs). A key requirement for these sensors is reproducibility and long-term stability of the superconducting (SC) transitions. Here, we discuss the impact of electrical contacts design and materials on the shape of the SC transitions. Using scanning electron microscope, atomic force microscope, and optical differential interference contrast microscopy, we observed the presence of unexpected defects of morphological nature on the titanium surface and their evolution in time in proximity to Nb contacts. We found direct correlation between the variations of the morphology and the SC transition shape. Experiments with different diffusion barriers between TES and Nb leads were performed to clarify the origin of this problem. We have demonstrated that the reproducibility of superconducting transitions can be significantly improved by preventing diffusion processes in the TES–leads contact areas.
Published: 2018

46. Thermal Links and Microstrip Transmission Lines in SPT-3G Bolometers

Author: Peter A. R. Ade, Faustin Carter, K. T. Story, J. S. Avva, Thomas Cecil, S. E. Kuhlmann, Junjia Ding, Gene C. Hilton, K. Vanderlinde, G. I. Noble, W. B. Everett, A. Cukierman, Q. Y. Tang, E. V. Denison, A. E. Lowitz, V. G. Yefremenko, R. N. Gannon, M. R. Young, Carole Tucker, K. L. Thompson, Alexandra S. Rahlin, R. Basu Thakur, Chihway Chang, N. W. Halverson, John E. Carlstrom, Amy N. Bender, J. A. Sobrin, Z. Pan, N. L. Harrington, Jason W. Henning, T. Natoli, Jason E. Austermann, S. S. Meyer, Kent D. Irwin, N. Whitehorn, D. Dutcher, Ralu Divan, Bradford Benson, K. W. Yoon, Graeme Smecher, A. Foster, Donna Kubik, J. F. Cliche, C. L. Kuo, Adrian T. Lee, Valentine Novosad, Andrew Nadolski, Zeeshan Ahmed, Trupti Khaire, Joshua Montgomery, T. de Haan, M. Jonas, A. J. Gilbert, A. A. Stark, W. Holzapfel, Adam Anderson, J. E. Ruhl, John E. Pearson, Leila R. Vale, C. S. Miller, M. A. Dobbs, N. Huang, J. C. Groh, Aritoki Suzuki, H. Nguyen, L. J. Saunders, C. M. Posada, A. M. Kofman, I. Shirley, Daniel Michalik, O. B. Jeong, Gensheng Wang, Joaquin Vieira, Liliana Stan, Erik Shirokoff, Stephen Padin, M. Korman, A. H. Harke-Hosemann, and J. T. Sayre
Subjects: 010302 applied physics, Physics, Physics::Instrumentation and Detectors, business.industry, Cosmic microwave background, Detector, Bolometer, Astrophysics::Instrumentation and Methods for Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Microstrip, Computer Science::Other, law.invention, South Pole Telescope, Optics, law, 0103 physical sciences, Thermal, Dissipation factor, General Materials Science, Transition edge sensor, 010306 general physics, business
Abstract: In this work, we have measured the properties of membrane-suspended bolometer thermal links and microstrip transmission lines in the transition-edge sensor arrays for the third-generation camera for South Pole Telescope (SPT-3G). A promising technique for controlling the end point of the release etch that defines the thermal link has been developed. We have also evaluated the microstrip loss in our detectors by measuring the optical efficiency of detectors with different lengths of microstrip line. The loss tangent is sufficiently low for the use in multi-chronic pixels for cosmic microwave background instruments like SPT-3G.
Published: 2018

47. Design and Assembly of SPT-3G Cold Readout Hardware

Author: Amy N. Bender, A. Cukierman, D. Dutcher, E. V. Denison, V. G. Yefremenko, C. M. Posada, W. B. Everett, Trupti Khaire, John E. Carlstrom, K. L. Thompson, Joaquin Vieira, Q. Y. Tang, Carole Tucker, Joshua Montgomery, A. E. Lowitz, Z. Pan, Alexandra S. Rahlin, Jason E. Austermann, K. W. Yoon, Graeme Smecher, R. Basu Thakur, Chihway Chang, Valentine Novosad, J. E. Ruhl, Faustin Carter, Leila R. Vale, Y. Hori, K. M. Rotermund, K. Vanderlinde, M. A. Dobbs, Peter A. R. Ade, S. E. Kuhlmann, Junjia Ding, K. T. Story, Oliver Jeong, J. F. Cliche, Kent D. Irwin, Gene C. Hilton, W. L. Holzapfel, M. Korman, A. A. Stark, R. N. Gannon, M. R. Young, Donna Kubik, John E. Pearson, Kaori Hattori, T. Natoli, Gensheng Wang, M. Jonas, Aritoki Suzuki, John Groh, A. J. Gilbert, Jason W. Henning, Tucker Elleflot, C. L. Kuo, A. Foster, Adam Anderson, Zeeshan Ahmed, Thomas Cecil, N. W. Halverson, T. de Haan, L. J. Saunders, J. A. Sobrin, H. Nguyen, Jessica Avva, Nathan Whitehorn, S. S. Meyer, Stephen Padin, Masaya Hasegawa, H. Nishino, A. M. Kofman, I. Shirley, Andrew Nadolski, A. H. Harke-Hosemann, G. I. Noble, Aaron Lee, Erik Shirokoff, N. Huang, J. T. Sayre, D. Barron, N. L. Harrington, and Bradford Benson
Subjects: 010302 applied physics, Physics, business.industry, Detector, Condensed Matter Physics, 01 natural sciences, Atomic and Molecular Physics, and Optics, Resonator, Upgrade, Thermal conductivity, South Pole Telescope, Planar, 0103 physical sciences, Optoelectronics, General Materials Science, 010306 general physics, business, Electrical impedance, Stripline
Abstract: The third-generation upgrade to the receiver on the South Pole Telescope, SPT-3G, was installed at the South Pole during the 2016–2017 austral summer to measure the polarization of the cosmic microwave background. Increasing the number of detectors by a factor of 10 to ∼16,000 \ud ∼16,000\ud required the multiplexing factor to increase to 68 and the bandwidth of the frequency-division readout electronics to span 1.6–5.2 MHz. This increase necessitates low-thermal conductance, low-inductance cryogenic wiring. Our cold readout system consists of planar thin-film aluminum inductive–capacitive resonators, wired in series with the detectors, summed together, and connected to 4K SQUIDs by 10−μm \ud 10−μm\ud -thick niobium–titanium (NbTi) broadside-coupled striplines. Here, we present an overview of the cold readout electronics for SPT-3G, including assembly details and characterization of electrical and thermal properties of the system. We report, for the NbTi striplines, values of R≤10 −4 Ω \ud R≤10−4Ω\ud , L=21±1 nH \ud L=21±1 nH\ud , and C=1.47±.02 nF \ud C=1.47±.02 nF\ud . Additionally, the striplines’ thermal conductivity is described by kA=6.0±0.3 T 0.92±0.04 μW mm K −1 \ud kA=6.0±0.3 T0.92±0.04 μW mm K−1\ud . Finally, we provide projections for cross talk induced by parasitic impedances from the stripline and find that the median value of percentage cross talk from leakage current is 0.22 and 0.09% \ud 0.09%\ud from wiring impedance.
Published: 2018

48. Fabrication of Detector Arrays for the SPT-3G Receiver

Author: N. W. Halverson, K. Vanderlinde, J. E. Ruhl, Leila R. Vale, C. L. Kuo, M. A. Dobbs, K. L. Thompson, Zeeshan Ahmed, Z. Pan, T. Natoli, Aaron Lee, Peter A. R. Ade, C. M. Posada, Bradford Benson, Jason W. Henning, E. V. Denison, A. Foster, A. E. Lowitz, K. T. Story, Amy N. Bender, V. G. Yefremenko, A. Cukierman, D. Dutcher, T. de Haan, Thomas Cecil, Joaquin Vieira, G. I. Noble, Jason E. Austermann, A. H. Harke-Hosemann, Kent D. Irwin, J. F. Cliche, Valentine Novosad, W. L. Holzapfel, K. W. Yoon, R. N. Gannon, M. R. Young, A. J. Gilbert, Andrew Nadolski, Adam Anderson, N. Huang, Donna Kubik, Graeme Smecher, W. B. Everett, Nathan Whitehorn, Daniel Michalik, Gensheng Wang, John Groh, N. L. Harrington, Q. Y. Tang, M. Jonas, Aritoki Suzuki, J. A. Sobrin, Trupti Khaire, Liliana Stan, S. S. Meyer, Carole Tucker, J. T. Sayre, Joshua Montgomery, Erik Shirokoff, Jessica Avva, I. Shirley, C. S. Miller, Stephen Padin, M. Korman, H. Nguyen, A. M. Kofman, Ralu Divan, L. J. Saunders, John E. Pearson, Alexandra S. Rahlin, R. Basu Thakur, Chihway Chang, A. A. Stark, John E. Carlstrom, Oliver Jeong, Faustin Carter, S. E. Kuhlmann, Junjia Ding, and Gene C. Hilton
Subjects: 010302 applied physics, Physics, business.industry, Detector, Bolometer, Condensed Matter Physics, 01 natural sciences, Multiplexing, Signal, Atomic and Molecular Physics, and Optics, Radio spectrum, law.invention, Cardinal point, Optics, South Pole Telescope, law, 0103 physical sciences, General Materials Science, Antenna (radio), 010306 general physics, business
Abstract: The South Pole Telescope third-generation (SPT-3G) receiver was installed during the austral summer of 2016–2017. It is designed to measure the cosmic microwave background across three frequency bands centered at 95, 150, and 220 GHz. The SPT-3G receiver has ten focal plane modules, each with 269 pixels. Each pixel features a broadband sinuous antenna coupled to a niobium microstrip transmission line. In-line filters define the desired band-passes before the signal is coupled to six bolometers with Ti/Au/Ti/Au transition edge sensors (three bands × \ud ×\ud two polarizations). In total, the SPT-3G receiver is composed of 16,000 detectors, which are read out using a 68× \ud ×\ud frequency-domain multiplexing scheme. In this paper, we present the process employed in fabricating the detector arrays.
Published: 2018

49. Broadband, millimeter-wave antireflection coatings for large-format, cryogenic aluminum oxide optics

Author: Nadolski, A., primary, Vieira, J. D., additional, Sobrin, J. A., additional, Kofman, A. M., additional, Ade, P. A. R., additional, Ahmed, Z., additional, Anderson, A. J., additional, Avva, J. S., additional, Basu Thakur, R., additional, Bender, A. N., additional, Benson, B. A., additional, Bryant, L., additional, Carlstrom, J. E., additional, Carter, F. W., additional, Cecil, T. W., additional, Chang, C. L., additional, Cheshire, J. R., additional, Chesmore, G. E., additional, Cliche, J. F., additional, Cukierman, A., additional, de Haan, T., additional, Dierickx, M., additional, Ding, J., additional, Dutcher, D., additional, Everett, W., additional, Farwick, J., additional, Ferguson, K. R., additional, Florez, L., additional, Foster, A., additional, Fu, J., additional, Gallicchio, J., additional, Gambrel, A. E., additional, Gardner, R. W., additional, Groh, J. C., additional, Guns, S., additional, Guyser, R., additional, Halverson, N. W., additional, Harke-Hosemann, A. H., additional, Harrington, N. L., additional, Harris, R. J., additional, Henning, J. W., additional, Holzapfel, W. L., additional, Howe, D., additional, Huang, N., additional, Irwin, K. D., additional, Jeong, O., additional, Jonas, M., additional, Jones, A., additional, Korman, M., additional, Kovac, J., additional, Kubik, D. L., additional, Kuhlmann, S., additional, Kuo, C.-L., additional, Lee, A. T., additional, Lowitz, A. E., additional, McMahon, J., additional, Meier, J., additional, Meyer, S. S., additional, Michalik, D., additional, Montgomery, J., additional, Natoli, T., additional, Nguyen, H., additional, Noble, G. I., additional, Novosad, V., additional, Padin, S., additional, Pan, Z., additional, Paschos, P., additional, Pearson, J., additional, Posada, C. M., additional, Quan, W., additional, Rahlin, A., additional, Riebel, D., additional, Ruhl, J. E., additional, Sayre, J. T., additional, Shirokoff, E., additional, Smecher, G., additional, Stark, A. A., additional, Stephen, J., additional, Story, K. T., additional, Suzuki, A., additional, Tandoi, C., additional, Thompson, K. L., additional, Tucker, C., additional, Vanderlinde, K., additional, Wang, G., additional, Whitehorn, N., additional, Yefremenko, V., additional, Yoon, K. W., additional, and Young, M. R., additional
Published: 2020
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50. On-Sky Performance of the SPT-3G Frequency-Domain Multiplexed Readout

Author: Bender, A. N., primary, Anderson, A. J., additional, Avva, J. S., additional, Ade, P. A. R., additional, Ahmed, Z., additional, Barry, P. S., additional, Basu Thakur, R., additional, Benson, B. A., additional, Bryant, L., additional, Byrum, K., additional, Carlstrom, J. E., additional, Carter, F. W., additional, Cecil, T. W., additional, Chang, C. L., additional, Cho, H.-M., additional, Cliche, J. F., additional, Cukierman, A., additional, de Haan, T., additional, Denison, E. V., additional, Ding, J., additional, Dobbs, M. A., additional, Dutcher, D., additional, Everett, W., additional, Ferguson, K. R., additional, Foster, A., additional, Fu, J., additional, Gallicchio, J., additional, Gambrel, A. E., additional, Gardner, R. W., additional, Gilbert, A., additional, Groh, J. C., additional, Guns, S., additional, Guyser, R., additional, Halverson, N. W., additional, Harke-Hosemann, A. H., additional, Harrington, N. L., additional, Henning, J. W., additional, Hilton, G. C., additional, Holzapfel, W. L., additional, Howe, D., additional, Huang, N., additional, Irwin, K. D., additional, Jeong, O. B., additional, Jonas, M., additional, Jones, A., additional, Khaire, T. S., additional, Kofman, A. M., additional, Korman, M., additional, Kubik, D. L., additional, Kuhlmann, S., additional, Kuo, C.-L., additional, Lee, A. T., additional, Leitch, E. M., additional, Lowitz, A. E., additional, Meyer, S. S., additional, Michalik, D., additional, Montgomery, J., additional, Nadolski, A., additional, Natoli, T., additional, Nguyen, H., additional, Noble, G. I., additional, Novosad, V., additional, Padin, S., additional, Pan, Z., additional, Paschos, P., additional, Pearson, J., additional, Posada, C. M., additional, Quan, W., additional, Rahlin, A., additional, Riebel, D., additional, Ruhl, J. E., additional, Sayre, J. T., additional, Shirokoff, E., additional, Smecher, G., additional, Sobrin, J. A., additional, Stark, A. A., additional, Stephen, J., additional, Story, K. T., additional, Suzuki, A., additional, Thompson, K. L., additional, Tucker, C., additional, Vale, L. R., additional, Vanderlinde, K., additional, Vieira, J. D., additional, Wang, G., additional, Whitehorn, N., additional, Yefremenko, V., additional, Yoon, K. W., additional, and Young, M. R., additional
Published: 2019
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