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14 results on '"Bartram, C"'

1. Axion Dark Matter eXperiment around 3.3 {\mu}eV with Dine-Fischler-Srednicki-Zhitnitsky Discovery Ability

Author

Bartram, C., Boutan, C., Braine, T., Buckley, J. H., Caligiure, T. J., Carosi, G., Chou, A. S., Cisneros, C., Clarke, John, Daw, E. J., Du, N., Duffy, L. D., Dyson, T. A., Gaikwad, C., Gleason, J. R., Goodman, C., Goryachev, M., Guzzetti, M., Hanretty, C., Hartman, E., Hipp, A. T., Hoffman, J., Hollister, M., Khatiwada, R., Knirck, S., Kuo, C. L., Lentz, E., McAllister, B. T., Mostyn, C., Murch, K., Oblath, N. S., Perry, M. G., Quiskamp, A., Robertson, N., Rosenberg, L. J, Ruppert, S., Rybka, G., Siddiqi, I., Sikivie, P., Sinnis, J., Solano, M. E., Sonnenschein, A., Sullivan, N. S., Tanner, D. B., Taubman, M. S., Tobar, M. E., Withers, M. O., Woollett, N., and Zhang, D.

Subjects
High Energy Physics - Experiment
Abstract

We report the results of a QCD axion dark matter search with discovery ability for Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) axions using an axion haloscope. Sub-Kelvin noise temperatures are reached with an ultra low-noise Josephson parametric amplifier cooled by a dilution refrigerator. This work excludes (with a 90% confidence level) DFSZ axions with masses between 3.27 to 3.34 {\mu}eV, assuming a standard halo model with a local energy density of 0.45 GeV/cc made up 100% of axions.

Published
2024

2. Axion Dark Matter eXperiment: Run 1A Analysis Details

Author

Boutan, C., LaRoque, B. H., Lentz, E., Oblath, N. S., Taubman, M. S., Tedeschi, J., Yang, J., Jones, A. M., Braine, T., Crisosto, N., Rosenberg, L. J, Rybka, G., Will, D., Zhang, D., Kimes, S., Ottens, R., Bartram, C., Bowring, D., Cervantes, R., Chou, A. S., Knirck, S., Mitchell, D. V., Sonnenschein, A., Wester, W., Khatiwada, R., Carosi, G., Du, N., Durham, S., O'Kelley, S. R., Woollett, N., Duffy, L. D., Bradley, R., Clarke, J., Siddiqi, I., Agrawal, A., Dixit, A. V., Gleason, J. R., Hipp, A. T., Jois, S., Sikivie, P., Sullivan, N. S., Tanner, D. B., Buckley, J. H., Gaikwad, C., Henriksen, E. A., Hoffman, J., Murch, K. W., Harrington, P. M., Daw, E. J., Perry, M. G., and Hilton, G. C.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

The ADMX collaboration gathered data for its Run 1A axion dark matter search from January to June 2017, scanning with an axion haloscope over the frequency range 645-680 MHz (2.66-2.81 ueV in axion mass) at DFSZ sensitivity. The resulting axion search found no axion-like signals comprising all the dark matter in the form of a virialized galactic halo over the entire frequency range, implying lower bound exclusion limits at or below DFSZ coupling at the 90% confidence level. This paper presents expanded details of the axion search analysis of Run 1A, including review of relevant experimental systems, data-taking operations, preparation and interpretation of raw data, axion search methodology, candidate handling, and final axion limits., Comment: 27 pages, 19 figures, accepted for publication in PRD

Published
2023

3. Non-Virialized Axion Search Sensitive to Doppler Effects in the Milky Way Halo

Author

Bartram, C., Braine, T., Cervantes, R., Crisosto, N., Du, N., Goodman, C., Guzzetti, M., Hanretty, C., Lee, S., Leum, G., Rosenberg, L. J., Rybka, G., Sinnis, J., Zhang, D., Awida, M. H., Bowring, D., Chou, A. S., Hollister, M., Knirck, S., Sonnenschein, A., Wester, W., Khatiwada, R., Brodsky, J., Carosi, G., Duffy, L. D., Goryachev, M., McAllister, B., Quiskamp, A., Thomson, C., Tobar, M. E., Boutan, C., Jones, M., LaRoque, B. H., Lentz, E., Man, N. E., Oblath, N. S., Taubman, M. S., Yang, J., Clarke, John, Siddiqi, I., Agrawal, A., Dixit, A. V., Gleason, J. R., Han, Y., Hipp, A. T., Jois, S., Sikivie, P., Sullivan, N. S., Tanner, D. B., Daw, E. J., Perry, M. G., Buckley, J. H., Gaikwad, C., Hoffman, J., Murch, K. W., and Russell, J.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Axion Dark Matter eXperiment (ADMX) has previously excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions between 680-790 MHz under the assumption that the dark matter is described by the isothermal halo model. However, the precise nature of the velocity distribution of dark matter is still unknown, and alternative models have been proposed. We report the results of a non-virialized axion search over the mass range 2.81-3.31 {\mu}eV, corresponding to the frequency range 680-800 MHz. This analysis marks the most sensitive search for non-virialized axions sensitive to Doppler effects in the Milky Way Halo to date. Accounting for frequency shifts due to the detector's motion through the Galaxy, we exclude cold flow relic axions with a velocity dispersion of order 10^-7 c with 95% confidence.

Published
2023

4. Search for a dark-matter induced Cosmic Axion Background with ADMX

Author

ADMX Collaboration, Nitta, T., Braine, T., Du, N., Guzzetti, M., Hanretty, C., Leum, G., Rosenberg, L. J, Rybka, G., Sinnis, J., Clarke, John, Siddiqi, I., Awida, M. H., Chou, A. S., Hollister, M., Knirck, S., Sonnenschein, A., Wester, W., Gleason, J. R., Hipp, A. T., Sikivie, P., Sullivan, N. S., Tanner, D. B., Khatiwada, R., Carosi, G., Robertson, N., Duffy, L. D., Boutan, C., Lentz, E., Oblath, N. S., Taubman, M. S., Yang, J., Daw, E. J., Perry, M. G., Bartram, C., Buckley, J. H., Gaikwad, C., Hoffman, J., Murch, K. W., Goryachev, M., Hartman, E., McAllister, B. T., Quiskamp, A., Thomson, C., Tobar, M. E., Dror, J. A., Murayama, H., and Rodd, N. L.

Subjects
High Energy Physics - Experiment
Abstract

We report the first result of a direct search for a Cosmic ${\it axion}$ Background (C$a$B) - a relativistic background of axions that is not dark matter - performed with the axion haloscope, the Axion Dark Matter eXperiment (ADMX). Conventional haloscope analyses search for a signal with a narrow bandwidth, as predicted for dark matter, whereas the C$a$B will be broad. We introduce a novel analysis strategy, which searches for a C$a$B induced daily modulation in the power measured by the haloscope. Using this, we repurpose data collected to search for dark matter to set a limit on the axion photon coupling of a C$a$B originating from dark matter cascade decay via a mediator in the 800-995 MHz frequency range. We find that the present sensitivity is limited by fluctuations in the cavity readout as the instrument scans across dark matter masses. Nevertheless, we suggest that these challenges can be surmounted using superconducting qubits as single photon counters, and allow ADMX to operate as a telescope searching for axions emerging from the decay of dark matter. The daily modulation analysis technique we introduce can be deployed for various broadband RF signals, such as other forms of a C$a$B or even high-frequency gravitational waves., Comment: 9 pages, 4 figures

Published
2023
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5. Low Frequency (100-600 MHz) Searches with Axion Cavity Haloscopes

Author

Chakrabarty, S., Gleason, J. R., Han, Y., Hipp, A. T., Solano, M., Sikivie, P., Sullivan, N. S., Tanner, D. B., Goryachev, M., Hartman, E., McAllister, B. T., Quiskamp, A., Thomson, C., Tobar, M. E., Awida, M. H., Chou, A. S., Hollister, M., Knirck, S., Sonnenschein, A., Wester, W., Braine, T., Guzzetti, M., Hanretty, C., Leum, G., Rosenberg, L. J, Rybka, G., Sinnis, J., Clarke, John, Siddiqi, I., Khatiwada, R., Carosi, G., Du, N., Robertson, N., Duffy, L. D., Boutan, C., Oblath, N. S., Taubman, M. S., Yang, J., Lentz, E., Daw, E. J., Perry, M. G., Bartram, C., Buckley, J. H., Gaikwad, C., Hoffman, J., Murch, K. W., and Nitta, T.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Experiment, Physics - Instrumentation and Detectors
Abstract

We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter eXperiment (ADMX) has already searched. Reentrant and dielectric loaded cavities were simulated numerically to calculate and optimize their form factors and quality factors. A prototype reentrant cavity was built and its measured properties were compared with the simulations. We estimate the sensitivity of axion dark matter searches using reentrant and dielectric loaded cavities inserted in the existing ADMX magnet at the University of Washington and a large magnet being installed at Fermilab., Comment: 33 pages, 24 figures

Published
2023

6. Electromagnetic modeling and science reach of DMRadio-m$^3$

Author

DMRadio Collaboration, AlShirawi, A., Bartram, C., Benabou, J. N., Brouwer, L., Chaudhuri, S., Cho, H. -M., Corbin, J., Craddock, W., Droster, A., Foster, J. W., Fry, J. T., Graham, P. W., Henning, R., Irwin, K. D., Kadribasic, F., Kahn, Y., Keller, A., Kolevatov, R., Kuenstner, S., Kurita, N., Leder, A. F., Li, D., Ouellet, J. L., Pappas, K. M. W., Phipps, A., Rapidis, N. M., Safdi, B. R., Salemi, C. P., Simanovskaia, M., Singh, J., van Assendelft, E. C., van Bibber, K., Wells, K., Winslow, L., Wisniewski, W. J., and Young, B. A.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

DMRadio-m$^3$ is an experiment that is designed to be sensitive to KSVZ and DFSZ QCD axion models in the 10-200 MHz (41 neV$/c^2$ - 0.83 $\mu$eV/$c^2$) range. The experiment uses a solenoidal dc magnetic field to convert an axion dark-matter signal to an ac electromagnetic response in a coaxial copper pickup. The current induced by this axion signal is measured by dc SQUIDs. In this work, we present the electromagnetic modeling of the response of the experiment to an axion signal over the full frequency range of DMRadio-m$^3$, which extends from the low-frequency, lumped-element limit to a regime where the axion Compton wavelength is only a factor of two larger than the detector size. With these results, we determine the live time and sensitivity of the experiment. The primary science goal of sensitivity to DFSZ axions across 30-200 MHz can be achieved with a $3\sigma$ live scan time of 3.7 years., Comment: 14 pages, 6 figures

Published
2023

7. Proton Compton Scattering from Linearly Polarized Gamma Rays

Author

Li, X., Ahmed, M. W., Banu, A., Bartram, C., Crowe, B., Downie, E. J., Emamian, M., Feldman, G., Gao, H., Godagama, D., Grießhammer, H. W., Howell, C. R., Karwowski, H. J., Kendellen, D. P., Kovash, M. A., Leung, K. K. H., Markoff, D. M., McGovern, J. A., Mikhailov, S., Pywell, R. E., Sikora, M. H., Silano, J. A., Sosa, R. S., Spraker, M. C., Swift, G., Wallace, P., Weller, H. R., Whisnant, C. S., Wu, Y. K., and Zhao, Z. W.

Subjects
Nuclear Experiment
Abstract

Differential cross sections for Compton scattering from the proton have been measured at scattering angles of $55^\circ$, $90^\circ$, and $125^\circ$ in the laboratory frame using quasimonoenergetic linearly (circularly) polarized photon beams with a weighted mean energy value of 83.4\,MeV (81.3\,MeV). These measurements were performed at the High Intensity Gamma-Ray Source facility at the Triangle Universities Nuclear Laboratory. The results are compared to previous measurements and are interpreted in the chiral effective field theory framework to extract the electromagnetic dipole polarizabilities of the proton, which gives $\alpha_{E1}^p = 13.8\pm1.2_{\rm stat}\pm0.1_{\rm BSR}\pm0.3_{\rm theo}, \beta_{M1}^p = 0.2\mp1.2_{\rm stat}\pm0.1_{\rm BSR}\mp0.3_{\rm theo}$ in units of 10$^{-4}$\, fm$^3$., Comment: 6 pages, 4 figures. Version identical to the published letter

Published
2022
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8. Axion Dark Matter

Author

Adams, C. B., Aggarwal, N., Agrawal, A., Balafendiev, R., Bartram, C., Baryakhtar, M., Bekker, H., Belov, P., Berggren, K. K., Berlin, A., Boutan, C., Bowring, D., Budker, D., Caldwell, A., Carenza, P., Carosi, G., Cervantes, R., Chakrabarty, S. S., Chaudhuri, S., Chen, T. Y., Cheong, S., Chou, A., Co, R. T., Conrad, J., Croon, D., D'Agnolo, R. T., Demarteau, M., DePorzio, N., Descalle, M., Desch, K., Di Luzio, L., Diaz-Morcillo, A., Dona, K., Drachnev, I. S., Droster, A., Du, N., Dunne, K., Döbrich, B., Ellis, S. A. R., Essig, R., Fan, J., Foster, J. W., Fry, J. T., Rosso, A. Gallo, Barceló, J. M. García, Irastorza, I. G., Gardner, S., Geraci, A. A., Ghosh, S., Giaccone, B., Giannotti, M., Gimeno, B., Grin, D., Grote, H., Guzzetti, M., Awida, M. H., Henning, R., Hoof, S., Hoshino, G., Irsic, V., Irwin, K. D., Jackson, H., Kimball, D. F. Jackson, Jaeckel, J., Jakovcic, K., Jewell, M. J., Kagan, M., Kahn, Y., Khatiwada, R., Knirck, S., Kovachy, T., Krueger, P., Kuenstner, S. E., Kurinsky, N. A., Leane, R. K., Leder, A. F., Lee, C., Lehnert, K. W., Lentz, E. W., Lewis, S. M., Liu, J., Lynn, M., Majorovits, B., Marsh, D. J. E., Maruyama, R. H., McAllister, B. T., Millar, A. J., Miller, D. W., Mitchell, J., Morampudi, S., Mueller, G., Nagaitsev, S., Nardi, E., Noroozian, O., O'Hare, C. A. J., Oblath, N. S., Ouellet, J. L., Pappas, K. M. W., Peiris, H. V., Perez, K., Phipps, A., Pivovaroff, M. J., Quílez, P., Rapidis, N. M., Robles, V. H., Rogers, K. K., Rudolph, J., Ruz, J., Rybka, G., Safdari, M., Safdi, B. R., Safronova, M. S., Salemi, C. P., Schuster, P., Schwartzman, A., Shu, J., Simanovskaia, M., Singh, J., Singh, S., Sinha, K., Sinnis, J. T., Siodlaczek, M., Smith, M. S., Snow, W. M., Sokolov, A. V., Sonnenschein, A., Speller, D. H., Stadnik, Y. V., Sun, C., Sushkov, A. O., Tait, T. M. P., Takhistov, V., Tanner, D. B., Tavecchio, F., Temples, D. J., Thomas, J. H., Tobar, M. E., Toro, N., Tsai, Y. -D., van Assendelft, E. C., van Bibber, K., Vandegar, M., Visinelli, L., Vitagliano, E., Vogel, J. K., Wang, Z., Wickenbrock, A., Winslow, L., Withington, S., Wooten, M., Yang, J., Young, B. A., Yu, F., Zhou, K., and Zhou, T.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors
Abstract

Axions are well-motivated dark matter candidates with simple cosmological production mechanisms. They were originally introduced to solve the strong CP problem, but also arise in a wide range of extensions to the Standard Model. This Snowmass white paper summarizes axion phenomenology and outlines next-generation laboratory experiments proposed to detect axion dark matter. There are vibrant synergies with astrophysical searches and advances in instrumentation including quantum-enabled readout, high-Q resonators and cavities and large high-field magnets. This white paper outlines a clear roadmap to discovery, and shows that the US is well-positioned to be at the forefront of the search for axion dark matter in the coming decade., Comment: restore and expand author list

Published
2022

9. New Horizons: Scalar and Vector Ultralight Dark Matter

Author

Antypas, D., Banerjee, A., Bartram, C., Baryakhtar, M., Betz, J., Bollinger, J. J., Boutan, C., Bowring, D., Budker, D., Carney, D., Carosi, G., Chaudhuri, S., Cheong, S., Chou, A., Chowdhury, M. D., Co, R. T., López-Urrutia, J. R. Crespo, Demarteau, M., DePorzio, N., Derbin, A. V., Deshpande, T., Di Luzio, L., Diaz-Morcillo, A., Doyle, J. M., Drlica-Wagner, A., Droster, A., Du, N., Döbrich, B., Eby, J., Essig, R., Farren, G. S., Figueroa, N. L., Fry, J. T., Gardner, S., Geraci, A. A., Ghalsasi, A., Ghosh, S., Giannotti, M., Gimeno, B., Griffin, S. M., Grin, D., Grote, H., Gundlach, J. H., Guzzetti, M., Hanneke, D., Harnik, R., Henning, R., Irsic, V., Jackson, H., Kimball, D. F. Jackson, Jaeckel, J., Kagan, M., Kedar, D., Khatiwada, R., Knirck, S., Kolkowitz, S., Kovachy, T., Kuenstner, S. E., Lasner, Z., Leder, A. F., Lehnert, R., Leibrandt, D. R., Lentz, E., Lewis, S. M., Liu, Z., Manley, J., Maruyama, R. H., Millar, A. J., Muratova, V. N., Musoke, N., Nagaitsev, S., Noroozian, O., O'Hare, C. A. J., Ouellet, J. L., Pappas, K. M. W., Peik, E., Perez, G., Phipps, A., Rapidis, N. M., Robinson, J. M., Robles, V. H., Rogers, K. K., Rudolph, J., Rybka, G., Safdari, M., Safronova, M. S., Salemi, C. P., Schmidt, P. O., Schumm, T., Schwartzman, A., Shu, J., Simanovskaia, M., Singh, J., Singh, S., Smith, M. S., Snow, W. M., Stadnik, Y. V., Sun, C., Sushkov, A. O., Tait, T. M. P., Takhistov, V., Tanner, D. B., Temples, D. J., Thirolf, P. G., Thomas, J. H., Tobar, M. E., Tretiak, O., Tsai, Y. -D., Tyson, J. A., Vandegar, M., Vermeulen, S., Visinelli, L., Vitagliano, E., Wang, Z., Wilson, D. J., Winslow, L., Withington, S., Wooten, M., Yang, J., Ye, J., Young, B. A., Yu, F., Zaheer, M. H., Zelevinsky, T., Zhao, Y., and Zhou, K.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Phenomenology, Physics - Instrumentation and Detectors, Quantum Physics
Abstract

The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision quantum sensors and dark matter detection strategies for ultralight ($<10\,$eV) bosonic dark matter that can be described by an oscillating classical, largely coherent field. This white paper focuses on searches for wavelike scalar and vector dark matter candidates., Comment: Snowmass 2021 White Paper

Published
2022

10. Dark Matter Axion Search Using a Josephson Traveling Wave Parametric Amplifier

Author

Bartram, C., Braine, T., Cervantes, R., Crisosto, N., Du, N., Leum, G., Mohapatra, P., Nitta, T., Rosenberg, L. J, Rybka, G., Yang, J., Clarke, John, Siddiqi, I., Agrawal, A., Dixit, A. V., Awida, M. H., Chou, A. S., Hollister, M., Knirck, S., Sonnenschein, A., Wester, W., Gleason, J. R., Hipp, A. T., Jois, S., Sikivie, P., Sullivan, N. S., Tanner, D. B., Hoof, S., Lentz, E., Khatiwada, R., Carosi, G., Cisneros, C., Robertson, N., Woollett, N., Duffy, L. D., Boutan, C., Jones, M., LaRoque, B. H., Oblath, N. S., Taubman, M. S., Daw, E. J., Perry, M. G., Buckley, J. H., Gaikwad, C., Hoffman, J., Murch, K., Goryachev, M., McAllister, B. T., Quiskamp, A., Thomson, C., and Tobar, M. E.

Subjects
High Energy Physics - Experiment, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

We present a new exclusion bound of axion-like particle dark matter with axion-photon couplings above $\mathrm{10^{-13}}$ $\mathrm{GeV^{-1}}$ over the frequency range 4796.7--4799.5 MHz, corresponding to a narrow range of axion masses centered around 19.84 $\mu$eV. This measurement represents the first implementation of a Josephson Traveling Wave Parametric Amplifier (JTWPA) in a dark matter search. The JTWPA was operated in the insert of the Axion Dark Matter eXperiment (ADMX) as part of an independent receiver chain that was attached to a 0.588-liter cavity. The ability of the JTWPA to deliver high gain over a wide (3 GHz) bandwidth has engendered interest from those aiming to perform broadband axion searches, a longstanding goal in this field.

Published
2021
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11. Search for 'Invisible' Axion Dark Matter in the $3.3\text{-}4.2~{\mu}$eV Mass Range

Author

ADMX Collaboration, Bartram, C., Braine, T., Burns, E., Cervantes, R., Crisosto, N., Du, N., Korandla, H., Leum, G., Mohapatra, P., Nitta, T., Rosenberg, L. J, Rybka, G., Yang, J., Clarke, John, Siddiqi, I., Agrawal, A., Dixit, A. V., Awida, M. H., Chou, A. S., Hollister, M., Knirck, S., Sonnenschein, A., Wester, W., Gleason, J. R., Hipp, A. T., Jois, S., Sikivie, P., Sullivan, N. S., Tanner, D. B., Lentz, E., Khatiwada, R., Carosi, G., Robertson, N., Woollett, N., Duffy, L. D., Boutan, C., Jones, M., LaRoque, B. H., Oblath, N. S., Taubman, M. S., Daw, E. J., Perry, M. G., Buckley, J. H., Gaikwad, C., Hoffman, J., Murch, K. W., Goryachev, M., McAllister, B. T., Quiskamp, A., Thomson, C., and Tobar, M. E.

Subjects
High Energy Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics, Physics - Instrumentation and Detectors
Abstract

We report the results from a haloscope search for axion dark matter in the $3.3\text{-}4.2~{\mu}$eV mass range. This search excludes the axion-photon coupling predicted by one of the benchmark models of "invisible" axion dark matter, the KSVZ model. This sensitivity is achieved using a large-volume cavity, a superconducting magnet, an ultra low noise Josephson parametric amplifier, and sub-Kelvin temperatures. The validity of our detection procedure is ensured by injecting and detecting blind synthetic axion signals., Comment: 6 pages, 5 figures

Published
2021
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12. Axion Dark Matter eXperiment: Run 1B Analysis Details

Author

ADMX Collaboration, Bartram, C., Braine, T., Cervantes, R., Crisosto, N., Du, N., Leum, G., Rosenberg, L. J, Rybka, G., Yang, J., Bowring, D., Chou, A. S., Khatiwada, R., Sonnenschein, A., Wester, W., Carosi, G., Woollett, N., Duffy, L. D., Goryachev, M., McAllister, B., Tobar, M. E., Boutan, C., Jones, M., Laroque, B. H., Oblath, N. S., Taubman, M. S., Clarke, John, Dove, A., Eddins, A., O'Kelley, S. R., Nawaz, S., Siddiqi, I., Stevenson, N., Agrawal, A., Dixit, A. V., Gleason, J. R., Jois, S., Sikivie, P., Solomon, J. A., Sullivan, N. S., Tanner, D. B., Lentz, E., Daw, E. J., Perry, M. G., Buckley, J. H., Harrington, P. M., Henriksen, E. A., and Murch, K. W.

Subjects
Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Searching for axion dark matter, the ADMX collaboration acquired data from January to October 2018, over the mass range 2.81--3.31 $\mu$eV, corresponding to the frequency range 680--790 MHz. Using an axion haloscope consisting of a microwave cavity in a strong magnetic field, the ADMX experiment excluded Dine-Fischler-Srednicki-Zhitnisky (DFSZ) axions at 100% dark matter density over this entire frequency range, except for a few gaps due to mode crossings. This paper explains the full ADMX analysis for Run 1B, motivating analysis choices informed by details specific to this run., Comment: 17 pages, 17 figures

Published
2020
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13. Axion Dark Matter eXperiment: Detailed Design and Operations

Author

Khatiwada, R., Bowring, D., Chou, A. S., Sonnenschein, A., Wester, W., Mitchell, D. V., Braine, T., Bartram, C., Cervantes, R., Crisosto, N., Du, N., Kimes, S., Rosenberg, L. J, Rybka, G., Yang, J., Will, D., Carosi, G., Woollett, N., Durham, S., Duffy, L. D., Bradley, R., Boutan, C., Jones, M., LaRoque, B. H., Oblath, N. S., Taubman, M. S., Tedeschi, J., Clarke, John, Dove, A., Eddins, A., Hashim, A., O'Kelley, S. R., Nawaz, S., Siddiqi, I., Stevenson, N., Agrawal, A., Dixit, A. V., Gleason, J. R., Jois, S., Sikivie, P., Sullivan, N. S., Tanner, D. B., Solomon, J. A., Lentz, E., Daw, E. J., Perry, M. G., Buckley, J. H., Harrington, P. M., Henriksen, E. A., Murch, K. W., and Hilton, G. C.

Subjects
Astrophysics - Instrumentation and Methods for Astrophysics, High Energy Physics - Experiment, Physics - Instrumentation and Detectors, Quantum Physics
Abstract

Axion Dark Matter eXperiment (ADMX) ultra low noise haloscope technology has enabled the successful completion of two science runs (1A and 1B) that looked for dark matter axions in the $2.66$ to $3.1$ $\mu$eV mass range with Dine-Fischler-Srednicki-Zhitnisky (DFSZ) sensitivity Ref. [1,2]. Therefore, it is the most sensitive axion search experiment to date in this mass range. We discuss the technological advances made in the last several years to achieve this sensitivity, which includes the implementation of components, such as state-of-the-art quantum limited amplifiers and a dilution refrigerator. Furthermore, we demonstrate the use of a frequency tunable Microstrip Superconducting Quantum Interference Device (SQUID) Amplifier (MSA), in Run 1A, and a Josephson Parametric Amplifier (JPA), in Run 1B, along with novel analysis tools that characterize the system noise temperature., Comment: 23 pages, 28 figures

Published
2020
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14. Compton scattering from $^4$He at the TUNL HI$\gamma$S facility

Author

Li, X., Ahmed, M. W., Banu, A., Bartram, C., Crowe, B., Downie, E. J., Emamian, M., Feldman, G., Gao, H., Godagama, D., Grießhammer, H. W., Howell, C. R., Karwowski, H. J., Kendellen, D. P., Kovash, M. A., Leung, K. K. H., Markoff, D., Mikhailov, S., Pywell, R. E., Sikora, M. H., Silano, J. A., Sosa, R. S., Spraker, M. C., Swift, G., Wallace, P., Weller, H. R., Whisnant, C. S., Wu, Y. K., and Zhao, Z. W.

Subjects
Nuclear Experiment, High Energy Physics - Experiment, High Energy Physics - Phenomenology, Nuclear Theory
Abstract

Differential cross sections for elastic Compton scattering from $^4$He have been measured with high statistical precision at the High Intensity $\gamma$-ray Source at laboratory scattering angles of $55^\circ$, $90^\circ$, and $125^\circ$ using a quasi-monoenergetic photon beam with a weighted mean energy value of $81.3$ MeV. The results are compared to previous measurements and similar fore-aft asymmetry in the angular distribution of the differential cross sections is observed. This experimental work is expected to strongly motivate the development of effective-field-theory calculations of Compton scattering from $^4$He to fully interpret the data., Comment: 8 pages, 8 figures

Published
2019
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