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1. Microwave Multiplexing on the Keck Array

Author

Cukierman, A., Ahmed, Z., Henderson, S., Young, E., Yu, C., Barkats, D., Brown, D., Chaudhuri, S., Cornelison, J., D’Ewart, J. M., Dierickx, M., Dober, B. J., Dusatko, J., Fatigoni, S., Filippini, J. P., Frisch, J. C., Haller, G., Halpern, M., Hilton, G. C., Hubmayr, J., Irwin, K. D., Karkare, K. S., Karpel, E., Kernasovskiy, S. A., Kovac, J. M., Kovacs, A., Kuenstner, S. E., Kuo, C. L., Li, D., Mates, J. A. B., Smith, S., St. Germaine, T., Ullom, J. N., Vale, L. R., Van Winkle, D. D., Vasquez, J., Willmert, J., Zeng, L., Ade, P. A. R., Amiri, M., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, V., Cheshire, J., Connors, J., Crumrine, M., Duband, L., Hall, G., Harrison, S., Hildebrandt, S. R., Hui, H., Kang, J., Kefeli, S., Lau, K., Megerian, K. G., Moncelsi, L., Namikawa, T., Nguyen, H. T., O’Brient, R., Palladino, S., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Soliman, A., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Wu, W. L. K., Yang, H., Yoon, K. W., and Zhang, C.

Published
2020
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2. Optical Characterization of the Keck Array and BICEP3 CMB Polarimeters from 2016 to 2019

Author

St Germaine, T., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, V., Cheshire, J., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Dierickx, M., Duband, L., Fatigoni, S., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O’Brient, R., Ogburn, IV, R. W., Palladino, S., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Soliman, A., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E., Yu, C., and Zhang, C.

Published
2020
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3. Plastic Laminate Antireflective Coatings for Millimeter-Wave Optics in BICEP Array

Author

Dierickx, M., Ade, P. A. R., Ahmed, Z., Amiri, M, Barkats, D., Basu Thakur, R., Bischoff, C. A., Beck, D. H., Bock, J. J., Buza, V., Cheshire, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E. V., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J. A., Grimes, P., Hallinan, G., Halal, G., Halpern, M., Hand, E., Harrison, S. C., Henderson, S. W., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K. Y., Leitch, E. M., Lennox, A., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'Brient, R., Palladino, S., Petroff, M. A., Precup, N., Prouvé, T., Pryke, C., Racine, B., Reintsema, C. D., Santalucia, D., Schillaci, A., Schmitt, B. L., Singari, B., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umilta, C., Vergès, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E. T., Yu, C. J., Zeng, L., Zhang, C., Zhang, S., Dierickx, M., Ade, P. A. R., Ahmed, Z., Amiri, M, Barkats, D., Basu Thakur, R., Bischoff, C. A., Beck, D. H., Bock, J. J., Buza, V., Cheshire, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E. V., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J. A., Grimes, P., Hallinan, G., Halal, G., Halpern, M., Hand, E., Harrison, S. C., Henderson, S. W., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K. Y., Leitch, E. M., Lennox, A., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'Brient, R., Palladino, S., Petroff, M. A., Precup, N., Prouvé, T., Pryke, C., Racine, B., Reintsema, C. D., Santalucia, D., Schillaci, A., Schmitt, B. L., Singari, B., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umilta, C., Vergès, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E. T., Yu, C. J., Zeng, L., Zhang, C., and Zhang, S.

Abstract

The BICEP/Keck series of experiments target the cosmic microwave background at degree-scale resolution from the South Pole. Over the next few years, the “Stage-3” BICEP Array (BA) telescope will improve the program’s frequency coverage and sensitivity to primordial B-mode polarization by an order of magnitude. The first receiver in the array, BA1, began observing at 30/40 GHz in early 2020. The next two receivers, BA2 and BA3, are currently being assembled and will map the southern sky at frequencies ranging from 95 to 150 GHz. Common to all BA receivers is a refractive, on-axis, cryogenic optical design that focuses microwave radiation onto a focal plane populated with antenna-coupled bolometers. High-performance antireflective coatings up to 760 mm in aperture are needed for each element in the optical chain, and must withstand repeated thermal cycles down to 4 K. Here, we present the design and fabrication of the 30/40 GHz anti-reflection coatings for the recently deployed BA1 receiver, with indices matched to its various polyethylene, nylon and alumina optical components. We describe an epoxy coating technique designed for alumina optics, which achieves better than 80% transmission at room temperature. For polyethylene optical elements, we present a new heat-compression approach that allows low-density polytetrafluoroethylene AR layers to reach sub-percent reflected power. We describe the planned use of these methods for the next BA cryostats, which may inform technological choices for future small-aperture telescopes of the CMB-S4 experiment.

Published
2023

4. 2022 Upgrade and Improved Low Frequency Camera Sensitivity for CMB Observation at the South Pole

Author

Soliman, A., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Beck, D., Bock, J. J., Buza, V., Cheshire, J., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A. J., Denison, E. V., Dierickx, M. I., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Giannakopoulos, C., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J., Grimes, P. K., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kangh, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Lennox, A., Liu, T., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., Brient, R. O., Palladino, S., Petroff, M. A., Precup, N., Prouve, T., Pryke, C., Benjamin Racine, Reintsema, C. D., Salatino, M., Schillaci, A., Schmitt, B. L., Singari, B., St Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tsai, C., Tucker, C., Turner, A. D., Umiltà, C., Vergès, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, H., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., Zhang, S., Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Département des Systèmes Basses Températures (DSBT ), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)

Subjects
Cosmic Inflation, synchrotron, primordial gravitational waves, Big-Bang, FOS: Physical sciences, BICEP Array, Detectors, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], CMB, Astrophysics - Instrumentation and Methods for Astrophysics, Telescope, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

Constraining the Galactic foregrounds with multi-frequency Cosmic Microwave Background (CMB) observations is an essential step towards ultimately reaching the sensitivity to measure primordial gravitational waves (PGWs), the sign of inflation after the Big-Bang that would be imprinted on the CMB. The BICEP Array telescope is a set of multi-frequency cameras designed to constrain the energy scale of inflation through CMB B-mode searches while also controlling the polarized galactic foregrounds. The lowest frequency BICEP Array receiver (BA1) has been observing from the South Pole since 2020 and provides 30 GHz and 40 GHz data to characterize the Galactic synchrotron in our CMB maps. In this paper, we present the design of the BA1 detectors and the full optical characterization of the camera including the on-sky performance at the South Pole. The paper also introduces the design challenges during the first observing season including the effect of out-of-band photons on detectors performance. It also describes the tests done to diagnose that effect and the new upgrade to minimize these photons, as well as installing more dichroic detectors during the 2022 deployment season to improve the BA1 sensitivity. We finally report background noise measurements of the detectors with the goal of having photon noise dominated detectors in both optical channels. BA1 achieves an improvement in mapping speed compared to the previous deployment season., Comment: Proceedings of SPIE Astronomical Telescopes + Instrumentation 2022 (AS22)

Published
2022
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5. BICEP Array: 150 GHz detector module development

Author

Schillaci, A., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Beck, D., Bock, J. J., Buza, V., Cheshire, J., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Giannakopoulos, C., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Lennox, A., Megerian, K. G., Miller, O. Y., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., Brient, R. O., Palladino, S., Petroff, M., Precup, N., Prouve, T., Pryke, C., Benjamin Racine, Reintsema, C. D., Schmitt, B. L., Singari, B., Soliman, A., St Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umilta, C., Verges, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., Zhang, S., Service des Basses Températures (SBT ), Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Département des Systèmes Basses Températures (DSBT ), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA)

Subjects
density, detector: cryogenics, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, superconductivity, pole, Astrophysics::Instrumentation and Methods for Astrophysics, costs, FOS: Physical sciences, fabrication, sensitivity, BICEP, buildings, cryogenics: design, amplifier, readout, upgrade, [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], Instrumentation and Methods for Astrophysics (astro-ph.IM), performance, Astrophysics - Cosmology and Nongalactic Astrophysics, cosmic background radiation: anisotropy
Abstract

The BICEP/Keck Collaboration is currently leading the quest to the highest sensitivity measurements of the polarized CMB anisotropies on degree scale with a series of cryogenic telescopes, of which BICEP Array is the latest Stage-3 upgrade with a total of $\sim32,000$ detectors. The instrument comprises 4 receivers spanning 30 to 270 GHz, with the low-frequency 30/40 GHz deployed to the South Pole Station in late 2019. The full complement of receivers is forecast to set the most stringent constraints on the tensor to scalar ratio $r$. Building on these advances, the overarching small-aperture telescope concept is already being used as the reference for further Stage-4 experiment design. In this paper I will present the development of the BICEP Array 150 GHz detector module and its fabrication requirements, with highlights on the high-density time division multiplexing (TDM) design of the cryogenic circuit boards. The low-impedance wiring required between the detectors and the first-stage SQUID amplifiers is crucial to maintain a stiff voltage bias on the detectors. A novel multi-layer FR4 Printed Circuit Board (PCB) with superconducting traces, capable of reading out up to 648 detectors, is presented along with its validation tests. I will also describe an ultra-high density TDM detector module we developed for a CMB-S4-like experiment that allows up to 1,920 detectors to be read out. TDM has been chosen as the detector readout technology for the Cosmic Microwave Background Stage-4 (CMB-S4) experiment based on its proven low-noise performance, predictable costs and overall maturity of the architecture. The heritage for TDM is rooted in mm- and submm-wave experiments dating back 20 years and has since evolved to support a multiplexing factor of 64x in Stage-3 experiments., Comment: 9 pages, 5 figure, Proceeding of LTD19 submitted to Journal of Low Temperature Physics

Published
2021
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6. A demonstration of improved constraints on primordial gravitational waves with delensing

Author

Ade, PAR, Ahmed, Z, Amiri, M, Anderson, AJ, Austermann, JE, Avva, JS, Barkats, D, Thakur, RB, Beall, JA, Bender, AN, Benson, BA, Bianchini, F, Bischoff, CA, Bleem, LE, Bock, JJ, Boenish, H, Bullock, E, Buza, V, Carlstrom, JE, Chang, CL, Cheshire, JR, Chiang, HC, Chou, T-L, Citron, R, Connors, J, Moran, CC, Cornelison, J, Crawford, TM, Crites, AT, Crumrine, M, Cukierman, A, de Haan, T, Dierickx, M, Dobbs, MA, Duband, L, Everett, W, Fatigoni, S, Filippini, JP, Fliescher, S, Gallicchio, J, George, EM, St Germaine, T, Goeckner-Wald, N, Goldfinger, DC, Grayson, J, Gupta, N, Hall, G, Halpern, M, Halverson, NW, Harrison, S, Henderson, S, Henning, JW, Hildebrandt, SR, Hilton, GC, Holder, GP, Holzapfel, WL, Hrubes, JD, Huang, N, Hubmayr, J, Hui, H, Irwin, KD, Kang, J, Karkare, KS, Karpel, E, Kefeli, S, Kernasovskiy, SA, Knox, L, Kovac, JM, Kuo, CL, Lau, K, Lee, AT, Leitch, EM, Li, D, Lowitz, A, Manzotti, A, McMahon, JJ, Megerian, KG, Meyer, SS, Millea, M, Mocanu, LM, Moncelsi, L, Montgomery, J, Nadolski, A, Namikawa, T, Natoli, T, Netterfield, CB, Nguyen, HT, Nibarger, JP, Noble, G, Novosad, V, O'Brient, R, Ogburn, RW, Omori, Y, Padin, S, Palladino, S, Patil, S, Prouve, T, Pryke, C, Racine, B, Reichardt, CL, Reintsema, CD, Richter, S, Ruhl, JE, Saliwanchik, BR, Schaffer, KK, Schillaci, A, Schmitt, BL, Schwarz, R, Sheehy, CD, Sievers, C, Smecher, G, Soliman, A, Stark, AA, Steinbach, B, Sudiwala, R, Teply, GP, Thompson, KL, Tolan, JE, Tucker, C, Turner, AD, Umilta, C, Veach, T, Vieira, JD, Vieregg, AG, Wandui, A, Wang, G, Weber, AC, Whitehorn, N, Wiebe, D, Willmert, J, Wong, CL, Wu, WLK, Yang, H, Yefremenko, V, Yoon, KW, Young, E, Yu, C, Zeng, L, Zhang, C, Ade, PAR, Ahmed, Z, Amiri, M, Anderson, AJ, Austermann, JE, Avva, JS, Barkats, D, Thakur, RB, Beall, JA, Bender, AN, Benson, BA, Bianchini, F, Bischoff, CA, Bleem, LE, Bock, JJ, Boenish, H, Bullock, E, Buza, V, Carlstrom, JE, Chang, CL, Cheshire, JR, Chiang, HC, Chou, T-L, Citron, R, Connors, J, Moran, CC, Cornelison, J, Crawford, TM, Crites, AT, Crumrine, M, Cukierman, A, de Haan, T, Dierickx, M, Dobbs, MA, Duband, L, Everett, W, Fatigoni, S, Filippini, JP, Fliescher, S, Gallicchio, J, George, EM, St Germaine, T, Goeckner-Wald, N, Goldfinger, DC, Grayson, J, Gupta, N, Hall, G, Halpern, M, Halverson, NW, Harrison, S, Henderson, S, Henning, JW, Hildebrandt, SR, Hilton, GC, Holder, GP, Holzapfel, WL, Hrubes, JD, Huang, N, Hubmayr, J, Hui, H, Irwin, KD, Kang, J, Karkare, KS, Karpel, E, Kefeli, S, Kernasovskiy, SA, Knox, L, Kovac, JM, Kuo, CL, Lau, K, Lee, AT, Leitch, EM, Li, D, Lowitz, A, Manzotti, A, McMahon, JJ, Megerian, KG, Meyer, SS, Millea, M, Mocanu, LM, Moncelsi, L, Montgomery, J, Nadolski, A, Namikawa, T, Natoli, T, Netterfield, CB, Nguyen, HT, Nibarger, JP, Noble, G, Novosad, V, O'Brient, R, Ogburn, RW, Omori, Y, Padin, S, Palladino, S, Patil, S, Prouve, T, Pryke, C, Racine, B, Reichardt, CL, Reintsema, CD, Richter, S, Ruhl, JE, Saliwanchik, BR, Schaffer, KK, Schillaci, A, Schmitt, BL, Schwarz, R, Sheehy, CD, Sievers, C, Smecher, G, Soliman, A, Stark, AA, Steinbach, B, Sudiwala, R, Teply, GP, Thompson, KL, Tolan, JE, Tucker, C, Turner, AD, Umilta, C, Veach, T, Vieira, JD, Vieregg, AG, Wandui, A, Wang, G, Weber, AC, Whitehorn, N, Wiebe, D, Willmert, J, Wong, CL, Wu, WLK, Yang, H, Yefremenko, V, Yoon, KW, Young, E, Yu, C, Zeng, L, and Zhang, C

Published
2021

7. Polarization calibration of the BICEP3 CMB polarimeter at the South Pole

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Cornelison, J., Ade, P. A. R., Ahmed, Zeeshan, Amiri, Mandana, Barkats, Denis, Basu Thakur, R., Bischoff, Colin, Bock, J. J., Boenish, Hans, Bullock, Eric, Buza, Victor, Cheshire, James R., Connors, Jake, Crumrine, Michael, Cukierman, Ari J., Denison, Edward, Dierickx, Marion, Duband, Lionel, Eiben, Miranda, Fatigoni, Sofia, Filippini, Jeff, Fliescher, Stefan, Goeckner-Wald, Neil, Goldfinger, David C., Grayson, James A., Grimes, Paul, Hall, Grantland, Halal, George, Halpern, Mark, Harrison, Samuel, Henderson, Shawn, Hildebrandt, S. R., Hilton, Gene C., Hubmayr, Johannes, Hui, H., Irwin, Kent D., Kang, Jae Hwan, Karkare, Kirit, Karpel, Ethan, Kefeli, S., Kernasovkiy, Sarah A., Kovac, John M., Kuo, Chao-Lin, Lau, King, Leitch, Eric, Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Yuka, Namikawa, Toshiya, Nguyen, H. T., O'Brient, R., Ogburn, R W., Palladino, Steven, Precup, Nathan, Prouve, Thomas, Pryke, Clement, Racine, Benjamin, Reintsema, Carl D., Richter, Steffen, Schillaci, A., Schmitt, Benjamin, Schwarz, Robert, Sheehy, Christopher D., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, Rashmi, Teply, G. P., Thompson, Keith, Tolan, James E., Tucker, Carole, Turner, A. D., Umilita, Caterina, Vieregg, Abigail G., Wandui, A., Weber, A. C., Wiebe, Don, Willmert, Justin, Wong, Chin Lin, Wu, Kimmy, Yang, Eric, Yoon, Ki Won, Young, Edward, Yu, Cyndia, Zeng, Lingzhen, Zhang, C., Zhang, S., Zmuidzinas, Jonas, Gao, Jian-Rong, Cornelison, J., Ade, P. A. R., Ahmed, Zeeshan, Amiri, Mandana, Barkats, Denis, Basu Thakur, R., Bischoff, Colin, Bock, J. J., Boenish, Hans, Bullock, Eric, Buza, Victor, Cheshire, James R., Connors, Jake, Crumrine, Michael, Cukierman, Ari J., Denison, Edward, Dierickx, Marion, Duband, Lionel, Eiben, Miranda, Fatigoni, Sofia, Filippini, Jeff, Fliescher, Stefan, Goeckner-Wald, Neil, Goldfinger, David C., Grayson, James A., Grimes, Paul, Hall, Grantland, Halal, George, Halpern, Mark, Harrison, Samuel, Henderson, Shawn, Hildebrandt, S. R., Hilton, Gene C., Hubmayr, Johannes, Hui, H., Irwin, Kent D., Kang, Jae Hwan, Karkare, Kirit, Karpel, Ethan, Kefeli, S., Kernasovkiy, Sarah A., Kovac, John M., Kuo, Chao-Lin, Lau, King, Leitch, Eric, Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Yuka, Namikawa, Toshiya, Nguyen, H. T., O'Brient, R., Ogburn, R W., Palladino, Steven, Precup, Nathan, Prouve, Thomas, Pryke, Clement, Racine, Benjamin, Reintsema, Carl D., Richter, Steffen, Schillaci, A., Schmitt, Benjamin, Schwarz, Robert, Sheehy, Christopher D., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, Rashmi, Teply, G. P., Thompson, Keith, Tolan, James E., Tucker, Carole, Turner, A. D., Umilita, Caterina, Vieregg, Abigail G., Wandui, A., Weber, A. C., Wiebe, Don, Willmert, Justin, Wong, Chin Lin, Wu, Kimmy, Yang, Eric, Yoon, Ki Won, Young, Edward, Yu, Cyndia, Zeng, Lingzhen, Zhang, C., and Zhang, S.

Abstract

The BICEP3 CMB Polarimeter is a small-aperture refracting telescope located at the South Pole and is specifically designed to search for the possible signature of inflationary gravitational waves in the Cosmic Microwave Background (CMB). The experiment measures polarization on the sky by differencing the signal of co-located, orthogonally polarized antennas coupled to Transition Edge Sensor (TES) detectors. We present precise measurements of the absolute polarization response angles and polarization efficiencies for nearly all of BICEP3's ~800 functioning polarization-sensitive detector pairs from calibration data taken in January 2018. Using a Rotating Polarized Source (RPS), we mapped polarization response for each detector over a full 360 degrees of source rotation and at multiple telescope boresight rotations from which per-pair polarization properties were estimated. In future work, these results will be used to constrain signals predicted by exotic physical models such as Cosmic Birefringence.

Published
2020

8. Improved polarization calibration of the BICEP3 CMB polarimeter at the South Pole

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Cornelison, J., Vergès, C., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Beck, D., Bischoff, C. A., Bock, J. J., Buza, V., Cheshire, J. R., Connors, J., Crumrine, M., Cukierman, A. J., Denison, E. V., Dierickx, M. I., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Giannakopoulos, C., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J., Grimes, P. K., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Lennox, A., Liu, T., Look, K., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Palladino, S., Petroff, M. A., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Salatino, M., Schillaci, A., Schmitt, B. L., Singari, B., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tsai, C., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, H., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Published
2022
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9. Thermal testing for cryogenic CMB instrument optical design

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Goldfinger, D. C., Ade, P.A.R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Beck, D., Bischoff, C. A., Bock, J. J., Buza, V., Cheshire, J., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A. J., Denison, E. V., Dierickx, M. I., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Giannakopoulos, C., Goeckner-Wald, N., Grayson, J., Grimes, P. K., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Lennox, A., Liu, T., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'Brient, R., Palladino, S., Petroff, M. A., Prouvé, T., Pryke, C., Racine, B., Reintsema, C. D., Salatino, M., Schillaci, A., Schmitt, B. L., Singari, B., Soliman, A., Smith, A. G., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tsai, C., Tucker, C., Turner, A. D., Umiltà, C., Verges, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, H., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Published
2022
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10. Microwave Multiplexing on the Keck Array

Author

Cukierman, A., primary, Ahmed, Z., additional, Henderson, S., additional, Young, E., additional, Yu, C., additional, Barkats, D., additional, Brown, D., additional, Chaudhuri, S., additional, Cornelison, J., additional, D’Ewart, J. M., additional, Dierickx, M., additional, Dober, B. J., additional, Dusatko, J., additional, Fatigoni, S., additional, Filippini, J. P., additional, Frisch, J. C., additional, Haller, G., additional, Halpern, M., additional, Hilton, G. C., additional, Hubmayr, J., additional, Irwin, K. D., additional, Karkare, K. S., additional, Karpel, E., additional, Kernasovskiy, S. A., additional, Kovac, J. M., additional, Kovacs, A., additional, Kuenstner, S. E., additional, Kuo, C. L., additional, Li, D., additional, Mates, J. A. B., additional, Smith, S., additional, St. Germaine, T., additional, Ullom, J. N., additional, Vale, L. R., additional, Van Winkle, D. D., additional, Vasquez, J., additional, Willmert, J., additional, Zeng, L., additional, Ade, P. A. R., additional, Amiri, M., additional, Basu Thakur, R., additional, Bischoff, C. A., additional, Bock, J. J., additional, Boenish, H., additional, Bullock, E., additional, Buza, V., additional, Cheshire, J., additional, Connors, J., additional, Crumrine, M., additional, Duband, L., additional, Hall, G., additional, Harrison, S., additional, Hildebrandt, S. R., additional, Hui, H., additional, Kang, J., additional, Kefeli, S., additional, Lau, K., additional, Megerian, K. G., additional, Moncelsi, L., additional, Namikawa, T., additional, Nguyen, H. T., additional, O’Brient, R., additional, Palladino, S., additional, Pryke, C., additional, Racine, B., additional, Reintsema, C. D., additional, Richter, S., additional, Schillaci, A., additional, Schwarz, R., additional, Sheehy, C. D., additional, Soliman, A., additional, Steinbach, B., additional, Sudiwala, R. V., additional, Thompson, K. L., additional, Tucker, C., additional, Turner, A. D., additional, Umiltà, C., additional, Vieregg, A. G., additional, Wandui, A., additional, Weber, A. C., additional, Wiebe, D. V., additional, Wu, W. L. K., additional, Yang, H., additional, Yoon, K. W., additional, and Zhang, C., additional

Published
2019
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11. BICEP2 / Keck Array IX: New bounds on anisotropies of CMB polarization rotation and implications for axionlike particles and primordial magnetic fields

Author

Array, Keck, Bicep, Collaborations, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Crill, B. P., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., St Germaine, T., Ghosh, T., Grayson, J., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Leitch, E. M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O Brient, R., Ogburn, R. W., Pryke, C., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Carole Tucker, Turner, A. D., Vieregg, A. G., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yoon, K. W., Institut Nanosciences et Cryogénie (INAC), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), BICEP2, Keck Arrary, Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Institut Nanosciences et Cryogénie ( INAC ), and Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Grenoble Alpes ( UGA )

Subjects
cosmological model, Photon, Cosmology and Nongalactic Astrophysics (astro-ph.CO), polarization: anisotropy, [ PHYS.ASTR ] Physics [physics]/Astrophysics [astro-ph], Cosmic microwave background, FOS: Physical sciences, cosmic background radiation: polarization, Astrophysics, 01 natural sciences, Electromagnetic radiation, High Energy Physics - Experiment, polarization: rotation, symbols.namesake, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), statistical analysis, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, Faraday effect, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], inflation, 010306 general physics, QC, QB, Physics, Brewster's angle, 010308 nuclear & particles physics, Chern-Simons term, coupling constant, magnetic field: primordial, Fine-structure constant, photon: interaction, Polarization (waves), BICEP, detector: sensitivity, High Energy Physics - Phenomenology, Amplitude, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], symbols, power spectrum: angular dependence, axion-like particles, [ PHYS.HPHE ] Physics [physics]/High Energy Physics - Phenomenology [hep-ph], S029IAG, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics, cosmic background radiation: anisotropy
Abstract

We present the strongest constraints to date on anisotropies of cosmic microwave background (CMB) polarization rotation derived from 150 GHz data taken by the BICEP2/Keck Array CMB experiments up to and including the 2014 observing season (BK14). The definition of the polarization angle in BK14 maps has gone through self-calibration in which the overall angle is adjusted to minimize the observed TB and EB power spectra. After this procedure, the QU maps lose sensitivity to a uniform polarization rotation but are still sensitive to anisotropies of polarization rotation. This analysis places constraints on the anisotropies of polarization rotation, which could be generated by CMB photons interacting with axionlike pseudoscalar fields or Faraday rotation induced by primordial magnetic fields. The sensitivity of BK14 maps ($\sim 3\mu$K-arcmin) makes it possible to reconstruct anisotropies of the polarization rotation angle and measure their angular power spectrum much more precisely than previous attempts. Our data are found to be consistent with no polarization rotation anisotropies, improving the upper bound on the amplitude of the rotation angle spectrum by roughly an order of magnitude compared to the previous best constraints. Our results lead to an order of magnitude better constraint on the coupling constant of the Chern-Simons electromagnetic term $g_{a\gamma}\leq 7.2\times 10^{-2}/H_I$ (95% confidence) than the constraint derived from the B-mode spectrum, where $H_I$ is the inflationary Hubble scale. This constraint leads to a limit on the decay constant of $10^{-6}\lesssim f_a/M_{\rm pl}$ at mass range of $10^{-33}< m_a< 10^{-28}$ eV for $r=0.01$, assuming $g_{a\gamma}\sim\alpha/(2\pi f_a)$ with $\alpha$ denoting the fine structure constant. The upper bound on the amplitude of the primordial magnetic fields is 30nG (95% confidence) from the polarization rotation anisotropies., Comment: 6 pages, 2 figures

Published
2017
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12. Analysis of Temperature-to-Polarization Leakage in BICEP3 and Keck CMB Data from 2016 to 2018

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, St. Germaine, T., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, V., Cheshire, J. R., Connors, J. A., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Fliescher, S., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Ogburn, R. W., Palladino, S., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schmitt, B. L., Schwarz, R., Sheehy, C. D., Soliman, A., Steinbach, B., Sudiwala, R., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, Cheng, and Zhang, S.

Published
2020
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13. Observing low elevation sky and the CMB Cold Spot with BICEP3 at the South Pole

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Kang, Jae Hwan, Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, Victor, Cheshire, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Fliescher, S., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C.-L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Ogburn, R. W., Palladino, S., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schmitt, B. L., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Published
2020
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14. 2017 upgrade and performance of BICEP3: a 95GHz refracting telescope for degree-scale CMB polarization

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Kang, Jae Hwan, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Boenish, H., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, H., K, Yoon, W., and Zhang, C.

Published
2018
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15. Ultra-thin large-aperture vacuum windows for millimeter wavelengths receivers

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Barkats, Denis, Dierickx, Marion I., Kovac, John M., Pentacoff, Chris, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S. A., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kuo, C. L., Lau, K., Larsen, N. A., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, H., Yoon, K. W., and Zhang, C.

Published
2018
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16. Design and performance of wide-band corrugated walls for the BICEP Array detector modules at 30/40 GHz

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Soliman, A., Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Lau, K., Larsen, N. A., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Van Zyl, J., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., and Zhang, C.

Published
2018
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17. BICEP Array cryostat and mount design

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Crumrine, Michael, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S. A., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M. V., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C. E., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., and Zhang, C.

Published
2018
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18. 2022 upgrade and improved low frequency camera sensitivity for CMB observation at the South Pole

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Soliman, A., Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Beck, D., Bock, J.J., Buza, V., Cheshire, J., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A. J., Denison, E. V., Dierichx, M. I., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Giannakopoulos, C., Goeckner-Wald, N., Goldfinger, D. C., Grayson, J., Grimes, P. K., Hall, G., Halal, G., Halpern, M., Hand, E., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Lennox, A., Liu, T., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'Brient, R., Palladino, S., Petroff, M. A., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Salatino, M., Schillaci, A., Schmitt, B. L., Singari, B., St. Germaine, T., Steinback, B., Sudiwala, R. V., Thompson, K. L., Tsai, C., Tucker, C., Turner, A. D., Umiltà, C., Vergès, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, H., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Published
2022
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19. Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Moncelsi, L., Ade, P. A. R., Z, Ahmed, Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C. A., Bock, J. J., Buza, V., Cheshire, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A. J., Denison, E. V., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S. A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Palladino, S., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Schillaci, A., Schmitt, B. L., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. L. K., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Published
2020
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20. BICEP Array: a multi-frequency degree-scale CMB polarimeter

Author

Hui, Howard, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Filescher, S., Grayson, J., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. -L., Lau, K., Larsen, N. A., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., Zhang, C., Hui, Howard, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Filescher, S., Grayson, J., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. -L., Lau, K., Larsen, N. A., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., and Zhang, C.

21. Receiver development for BICEP Array, a next-generation CMB polarimeter at the South Pole

Author

Moncelsi, L., Ade, P.A.R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C.A., Bock, J.J., Buza, V., Cheshire, J.R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A.J., Denison, E.V., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S.A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Palladino, S., Precup, N., Pouve, T., Pryke, C., Racine, B., Reintsema, C. D., Schillaci, A., Schmitt, B. L., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. K. L., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., Zhang, S., Moncelsi, L., Ade, P.A.R., Ahmed, Z., Amiri, M., Barkats, D., Basu Thakur, R., Bischoff, C.A., Bock, J.J., Buza, V., Cheshire, J.R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A.J., Denison, E.V., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S.A., Henderson, S., Hildebrandt, S. R., Hilton, G. C., Hubmayr, J., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Kefeli, S., Kovac, J. M., Kuo, C. L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Palladino, S., Precup, N., Pouve, T., Pryke, C., Racine, B., Reintsema, C. D., Schillaci, A., Schmitt, B. L., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Thompson, K. L., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wu, W. K. L., Yang, E., Yoon, K. W., Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

22. 2017 upgrade and performance of BICEP3: a 95GHz refracting telescope for degree-scale CMB polarization

Author

Kang, Jae Hwan, Ade, P. A. R., Ahmed, Z., Aitkin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Boenish, H., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Cumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M., Megerian, K. G., Monxelsi, L., Namikawa, T., Netterfield, B., Nguyen, H. T., O'Brient, R., Ogburn IV, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Stanisewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Wang, H., Yoon, K. W., Zhang, C., Kang, Jae Hwan, Ade, P. A. R., Ahmed, Z., Aitkin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Boenish, H., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Cumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M., Megerian, K. G., Monxelsi, L., Namikawa, T., Netterfield, B., Nguyen, H. T., O'Brient, R., Ogburn IV, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schillaci, A., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Stanisewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Wang, H., Yoon, K. W., and Zhang, C.

23. Ultra-thin large-aperture vacuum windows for millimeter wavelengths receivers

Author

Barkats, Denis, Dierickx, Marion I., Kovac, John M, Pentacoff, Chris, Ade, P. A. R, Ahmed, Z, Aikin, R. W, Alexander, K. D, Benton, S. J, Bischof, C. A, Bock, J. J, Bowens-Rubin, R, Brevik, J. A, Buder, I, Bullock, E, Buza, V, Connors, J, Cornelison, J, Crill, B. P, Crumrine, M, Duband, L, Dvorkin, C, Filippini, J. P, Fliescher, S, Grayson, J, Hall, G, Halpern, M, Harrison, S, Hildebrandt, S. R, Hilton, G. C, Hui, H, Irwin, K. D, Kang, J, Karkare, K. S, Karpel, E, Kaufman, J. P, Keating, B. G, Kefeli, S, Kernasovskiy, S. A, Kuo, C. L, Lau, K, Larsen, N. A, Leitch, E. M, Lueker, M, Megerian, K. G, Moncelsi, L, Namikawa, T, Nguyen, H. T, O'Brient, R, Ogburn IV, R. W., Palladino, S, Pryke, C, Racine, B, Richter, S, Schwarz, R, Schillaci, A, Sheehy, C. D, Soliman, A, St. Germaine, T, Staniszewski, Z. K, Steinbach, B, Sudiwala, R. V, Teply, G. P, Thompson, K. L., Tolan, J. E, Tucker, C, Turner, A. D, Umilta, C, Vieregg, A. G, Wandui, A, Weber, A. C, Wiebe, D. V, Willmert, J, Wong, C. L, Wu, W. L. K., Yang, H, Yoon, K. W, Zhang, Z, Barkats, Denis, Dierickx, Marion I., Kovac, John M, Pentacoff, Chris, Ade, P. A. R, Ahmed, Z, Aikin, R. W, Alexander, K. D, Benton, S. J, Bischof, C. A, Bock, J. J, Bowens-Rubin, R, Brevik, J. A, Buder, I, Bullock, E, Buza, V, Connors, J, Cornelison, J, Crill, B. P, Crumrine, M, Duband, L, Dvorkin, C, Filippini, J. P, Fliescher, S, Grayson, J, Hall, G, Halpern, M, Harrison, S, Hildebrandt, S. R, Hilton, G. C, Hui, H, Irwin, K. D, Kang, J, Karkare, K. S, Karpel, E, Kaufman, J. P, Keating, B. G, Kefeli, S, Kernasovskiy, S. A, Kuo, C. L, Lau, K, Larsen, N. A, Leitch, E. M, Lueker, M, Megerian, K. G, Moncelsi, L, Namikawa, T, Nguyen, H. T, O'Brient, R, Ogburn IV, R. W., Palladino, S, Pryke, C, Racine, B, Richter, S, Schwarz, R, Schillaci, A, Sheehy, C. D, Soliman, A, St. Germaine, T, Staniszewski, Z. K, Steinbach, B, Sudiwala, R. V, Teply, G. P, Thompson, K. L., Tolan, J. E, Tucker, C, Turner, A. D, Umilta, C, Vieregg, A. G, Wandui, A, Weber, A. C, Wiebe, D. V, Willmert, J, Wong, C. L, Wu, W. L. K., Yang, H, Yoon, K. W, and Zhang, Z

Abstract

Targeting faint polarization patterns arising from Primordial Gravitational Waves in the Cosmic Microwave Background requires excellent observational sensitivity. Optical elements in small aperture experiments such as Bicep3 and Keck Array are designed to optimize throughput and minimize losses from transmission, reflection and scattering at millimeter wavelengths. As aperture size increases, cryostat vacuum windows must withstand larger forces from atmospheric pressure and the solution has often led to a thicker window at the expense of larger transmission loss. We have identified a new candidate material for the fabrication of vacuum windows: with a tensile strength two orders of magnitude larger than previously used materials, woven high-modulus polyethylene could allow for dramatically thinner windows, and therefore significantly reduced losses and higher sensitivity. In these proceedings we investigate the suitability of high-modulus polyethylene windows for ground-based CMB experiments, such as current and future receivers in the Bicep/Keck Array program. This includes characterizing their optical transmission as well as their mechanical behavior under atmospheric pressure. We find that such ultra-thin materials are promising candidates to improve the performance of large-aperture instruments at millimeter wavelengths, and outline a plan for further tests ahead of a possible upcoming field deployment of such a science-grade window....

24. Observing low elevation sky and the CMB Cold Spot with BICEP3 at the South Pole

Author

Kang, Jaw Hwan, Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Thakur, Basu R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, Victor, Cheshire IV, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Filescher, S., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S. A., Henderson, S., Hildebrandt, S. R., HIlton, C. G., Hubmayr, J., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. -L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Ogburn IV, R. W., Palladino, S., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schmitt, B. L., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K, Young, E., Yu, C., Zeng, L., Zhang, C., Zhang, S., Kang, Jaw Hwan, Ade, P. A. R., Ahmed, Z., Amiri, M., Barkats, D., Thakur, Basu R., Bischoff, C. A., Bock, J. J., Boenish, H., Bullock, E., Buza, Victor, Cheshire IV, J. R., Connors, J., Cornelison, J., Crumrine, M., Cukierman, A., Denison, E., Dierickx, M., Duband, L., Eiben, M., Fatigoni, S., Filippini, J. P., Filescher, S., Goeckner-Wald, N., Goldfinger, D., Grayson, J. A., Grimes, P., Hall, G., Halpern, M., Harrison, S. A., Henderson, S., Hildebrandt, S. R., HIlton, C. G., Hubmayr, J., Hui, H., Irwin, K. D., Karkare, K. S., Karpel, E., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C. -L., Lau, K., Leitch, E. M., Megerian, K. G., Minutolo, L., Moncelsi, L., Nakato, Y., Namikawa, T., Nguyen, H. T., O'brient, R., Ogburn IV, R. W., Palladino, S., Precup, N., Prouve, T., Pryke, C., Racine, B., Reintsema, C. D., Richter, S., Schillaci, A., Schmitt, B. L., Schwarz, R., Sheehy, C. D., Soliman, A., St. Germaine, T., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K, Young, E., Yu, C., Zeng, L., Zhang, C., and Zhang, S.

Abstract

BICEP3 is a 520 mm aperture on-axis refracting telescope at the South Pole, which observes the polarization of the cosmic microwave background (CMB) at 95 GHz to search for the B-mode signal from inflationary gravitational waves. In addition to this main target, we have developed a low-elevation observation strategy to extend coverage of the Southern sky at the South Pole, where BICEP3 can quickly achieve degree-scale E-mode measurements over a large area. An interesting E-mode measurement is probing a potential polarization anomaly around the CMB Cold Spot. During the austral summer seasons of 2018-19 and 2019-20, BICEP3 observed the sky with a flat mirror to redirect the beams to various low elevation ranges. The preliminary data analysis shows degree-scale E-modes measured with high signal-to-noise ratio....

25. BICEP Array cryostat and mount design

Author

Crumrine, Michael, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bishchoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Filescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S. A., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kemasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M. V., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn IV, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C. E., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., WIllmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., Zhang, C., Crumrine, Michael, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bishchoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Filescher, S., Grayson, J. A., Hall, G., Halpern, M., Harrison, S. A., Hildebrandt, S. R., Hilton, G. C., Hui, H., Irwin, K. D., Kang, J. H., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kemasovskiy, S. A., Kovac, J. M., Kuo, C. L., Larsen, N. A., Lau, K., Leitch, E. M., Lueker, M. V., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn IV, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C. E., Turner, A. D., Umilta, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., WIllmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., and Zhang, C.

Abstract

Bicep Array is a cosmic microwave background (CMB) polarization experiment that will begin observing at the South Pole in early 2019. This experiment replaces the five Bicep2 style receivers that compose the Keck Array with four larger Bicep3 style receivers observing at six frequencies from 30 to 270GHz. The 95GHz and 150GHz receivers will continue to push the already deep Bicep/Keck CMB maps while the 30/40GHz and 220/270GHz receivers will constrain the synchrotron and galactic dust foregrounds respectively. Here we report on the design and performance of the Bicep Array instruments focusing on the mount and cryostat systems....

26. BICEP Array: a multi-frequency degree-scale CMB polarimeter

Author

Zmuidzinas, Jonas, Gao, Jian-Rong, Hui, Howard, Ade, P. A. R., Ahmed, Z., Aikin, R. W., Alexander, K. D., Barkats, D., Benton, S. J., Bischoff, C. A., Bock, J. J., Bowens-Rubin, R., Brevik, J. A., Buder, I., Bullock, E., Buza, V., Connors, J., Cornelison, J., Crill, B. P., Crumrine, M., Dierickx, M., Duband, L., Dvorkin, C., Filippini, J. P., Fliescher, S., Grayson, J., Hall, G., Halpern, M., Harrison, S., Hildebrandt, S. R., Hilton, G. C., Irwin, K. D., Kang, J., Karkare, K. S., Karpel, E., Kaufman, J. P., Keating, B. G., Kefeli, S., Kernasovskiy, S. A., Kovac, J. M., Kuo, C.-L., Lau, K., Larsen, N. A., Leitch, E. M., Lueker, M., Megerian, K. G., Moncelsi, L., Namikawa, T., Netterfield, C. B., Nguyen, H. T., O'Brient, R., Ogburn, R. W., Palladino, S., Pryke, C., Racine, B., Richter, S., Schwarz, R., Schillaci, A., Sheehy, C. D., Soliman, A., St. Germaine, T., Staniszewski, Z. K., Steinbach, B., Sudiwala, R. V., Teply, G. P., Thompson, K. L., Tolan, J. E., Tucker, C., Turner, A. D., Umiltà, C., Vieregg, A. G., Wandui, A., Weber, A. C., Wiebe, D. V., Willmert, J., Wong, C. L., Wu, W. L. K., Yang, E., Yoon, K. W., and Zhang, C.

Published
2018
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27. Constraints on Primordial Gravitational Waves Using Planck, WMAP, and New BICEP2/Keck Observations through the 2015 Season.

Author

Ade PAR, Ahmed Z, Aikin RW, Alexander KD, Barkats D, Benton SJ, Bischoff CA, Bock JJ, Bowens-Rubin R, Brevik JA, Buder I, Bullock E, Buza V, Connors J, Cornelison J, Crill BP, Crumrine M, Dierickx M, Duband L, Dvorkin C, Filippini JP, Fliescher S, Grayson J, Hall G, Halpern M, Harrison S, Hildebrandt SR, Hilton GC, Hui H, Irwin KD, Kang J, Karkare KS, Karpel E, Kaufman JP, Keating BG, Kefeli S, Kernasovskiy SA, Kovac JM, Kuo CL, Larsen NA, Lau K, Leitch EM, Lueker M, Megerian KG, Moncelsi L, Namikawa T, Netterfield CB, Nguyen HT, O'Brient R, Ogburn RW, Palladino S, Pryke C, Racine B, Richter S, Schillaci A, Schwarz R, Sheehy CD, Soliman A, St Germaine T, Staniszewski ZK, Steinbach B, Sudiwala RV, Teply GP, Thompson KL, Tolan JE, Tucker C, Turner AD, Umiltà C, Vieregg AG, Wandui A, Weber AC, Wiebe DV, Willmert J, Wong CL, Wu WLK, Yang H, Yoon KW, and Zhang C

Abstract

We present results from an analysis of all data taken by the bicep2/Keck CMB polarization experiments up to and including the 2015 observing season. This includes the first Keck Array observations at 220 GHz and additional observations at 95 and 150 GHz. The Q and U maps reach depths of 5.2, 2.9, and 26  μK&#95;{CMB} arcmin at 95, 150, and 220 GHz, respectively, over an effective area of ≈400 square degrees. The 220 GHz maps achieve a signal to noise on polarized dust emission approximately equal to that of Planck at 353 GHz. We take auto and cross spectra between these maps and publicly available WMAP and Planck maps at frequencies from 23 to 353 GHz. We evaluate the joint likelihood of the spectra versus a multicomponent model of lensed-ΛCDM+r+dust+synchrotron+noise. The foreground model has seven parameters, and we impose priors on some of these using external information from Planck and WMAP derived from larger regions of sky. The model is shown to be an adequate description of the data at the current noise levels. The likelihood analysis yields the constraint r&#95;{0.05}<0.07 at 95% confidence, which tightens to r&#95;{0.05}<0.06 in conjunction with Planck temperature measurements and other data. The lensing signal is detected at 8.8σ significance. Running a maximum likelihood search on simulations we obtain unbiased results and find that σ(r)=0.020. These are the strongest constraints to date on primordial gravitational waves.

Published
2018
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