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1. New Approaches to Low-Energy Calibration of Cryogenic Detectors

Author

E. Fascione, R. Underwood, R. Germond, M. Peterson-Galema, W. Rau, M. Ghaith, and P. Di Stefano

Subjects
Physics, Work (thermodynamics), Range (particle radiation), Physics::Instrumentation and Detectors, business.industry, Dark matter, Detector, Astrophysics::Instrumentation and Methods for Astrophysics, Condensed Matter Physics, 01 natural sciences, 7. Clean energy, Atomic and Molecular Physics, and Optics, 010305 fluids & plasmas, law.invention, Wavelength, Optics, law, 0103 physical sciences, Calibration, General Materials Science, 010306 general physics, business, Energy (signal processing), Light-emitting diode
Abstract

Searches for dark matter with cryogenic detectors are pushing to lower energy thresholds at each development stage. Consequently, new approaches for detector calibration at the proposed energy scales are necessary. In the case of SuperCDMS SNOLAB, energy thresholds in the range of a few eV are expected. In this paper, we are reporting R&D work for new ideas to calibrate cryogenic detectors in the eV range utilizing LEDs of various wavelengths operated at cryogenic temperatures.

Published
2020
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2. Constraints on low-mass, relic dark matter candidates from a surface-operated SuperCDMS single-charge sensitive detector

Author

K. Fouts, W. Rau, D. A. Bauer, S. S. Poudel, N. Chott, M. L. di Vacri, Ruth Lawrence, Fernando Ponce, H. E. Rogers, S. Scorza, Xingbo Zhao, R. Germond, John Wilson, Bruno Serfass, M. H. Kelsey, A. N. Villano, S. M. Oser, C. Stanford, E. Lopez Asamar, A. Sattari, Matthew Fritts, A. J. Mayer, Vuk Mandic, I. J. Arnquist, B. A. Hines, N. Herbert, M. Michaud, H. R. Harris, Tarek Saab, N. Mast, P. Cushman, D. Barker, H. G. Zhang, L. Zheng, E. Zhang, Douglas Wright, Sunil Golwala, Seema Verma, M. Stein, T. Reynolds, To Chin Yu, Betty A. Young, R. A. Cameron, John L. Orrell, D. MacDonell, L. Hsu, Yu Kai Chang, S. L. Watkins, Martin E. Huber, D. Toback, Jodi Cooley, C. Cartaro, P. Pakarha, N. Mirabolfathi, Bedangadas Mohanty, Amy Roberts, A. Li, J. D. Morales Mendoza, M. A. Bowles, R. Chen, D. Jardin, D. W. P. Amaral, B. von Krosigk, A. Jastram, C. W. Fink, Matt Pyle, S. Nagorny, E. Fascione, R. Underwood, H. Coombes, T. Aralis, R. W. Schnee, D. B. MacFarlane, E. Azadbakht, T. Binder, David G. Cerdeño, Ben Loer, Blas Cabrera, R. Mahapatra, R. Calkins, J. Corbett, R. Bhattacharyya, Noah Kurinsky, E. Michielin, J. Winchell, J. K. Nelson, L. Wills, S. J. Yellin, Tsuguo Aramaki, L. V. S. Bezerra, W. A. Page, M. I. Hollister, J. Sander, D. J. Sincavage, M. Ghaith, F. De Brienne, G. Gerbier, R. Bunker, J. Street, E. Reid, Enectali Figueroa-Feliciano, R. Ren, A. Kubik, P. L. Brink, Bernard Sadoulet, A. E. Robinson, V. Iyer, R. Podviianiuk, R. Partridge, P. Lukens, M. Diamond, Ziqing Hong, M. J. Wilson, V. Novati, S. Banik, Eric W. Hoppe, H. Neog, and C. Bathurst

Subjects
Coupling constant, Physics, Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Dark matter, FOS: Physical sciences, Charge (physics), Instrumentation and Detectors (physics.ins-det), Electron, Kinetic energy, 01 natural sciences, Dark photon, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Absorption (logic), Atomic physics, 010306 general physics, Light dark matter, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

This article presents an analysis and the resulting limits on light dark matter inelastically scattering off of electrons, and on dark photon and axion-like particle absorption, using a second-generation SuperCDMS high-voltage eV-resolution detector. The 0.93 gram Si detector achieved a 3 eV phonon energy resolution; for a detector bias of 100 V, this corresponds to a charge resolution of 3% of a single electron-hole pair. The energy spectrum is reported from a blind analysis with 1.2 gram-days of exposure acquired in an above-ground laboratory. With charge carrier trapping and impact ionization effects incorporated into the dark matter signal models, the dark matter-electron cross section $\bar{\sigma}_{e}$ is constrained for dark matter masses from 0.5--$10^{4} $MeV$/c^{2}$; in the mass range from 1.2--50 eV$/c^{2}$ the dark photon kinetic mixing parameter $\varepsilon$ and the axioelectric coupling constant $g_{ae}$ are constrained. The minimum 90% confidence-level upper limits within the above mentioned mass ranges are $\bar{\sigma}_{e}\,=\,8.7\times10^{-34}$ cm$^{2}$, $\varepsilon\,=\,3.3\times10^{-14}$, and $g_{ae}\,=\,1.0\times10^{-9}$., Comment: 5 pages + title and references, 3 figures and 1 table

Published
2020

3. Constraints on dark photons and axionlike particles from the SuperCDMS Soudan experiment

Author

É. M. Michaud, R. Mahapatra, C. W. Fink, R. Underwood, R. A. Cameron, N. Herbert, John L. Orrell, N. Mirabolfathi, D. MacDonell, Ben Loer, D. A. Bauer, S. S. Poudel, C. Cartaro, W. Baker, H. R. Harris, Fernando Ponce, Bedangadas Mohanty, A. Li, Yu Kai Chang, Betty A. Young, Amy Roberts, A. Jastram, C. Stanford, D. J. Sincavage, D. Jardin, A. N. Villano, P. Lukens, M. Diamond, Matthew Fritts, Vuk Mandic, S. M. Oser, K. Fouts, L. Zheng, J. Street, M. Stein, M. I. Hollister, John Wilson, M. E. Huber, E. Azadbakht, A. Kennedy, Ziqing Hong, Xingbo Zhao, T. Reynolds, H. Coombes, F. De Brienne, G. Gerbier, D. B. MacFarlane, Emily Z. Zhang, H. E. Rogers, J. D. Morales Mendoza, L. V. S. Bezerra, Emanuele Michielin, Blas Cabrera, M. J. Wilson, Ruth Lawrence, P. Cushman, T. Binder, Bruno Serfass, S. Banik, Eric W. Hoppe, S. J. Yellin, Tsuguo Aramaki, D. H. Wright, J. Corbett, Noah Kurinsky, H. Neog, C. Bathurst, M. A. Bowles, R. Germond, W. A. Page, Matt Pyle, W. Rau, V. Iyer, R. Podviianiuk, Kartik Senapati, M. Ghaith, Sunil Golwala, S. Nagorny, B. Cornell, E. Fascione, R. Bunker, J. K. Nelson, A. Kubik, M. L. di Vacri, A. E. Robinson, I. J. Arnquist, R. W. Schnee, L. Hsu, S. Scorza, R. Partridge, Tarek Saab, N. Mast, L. Wills, R. Bhattacharyya, D. Toback, B. von Krosigk, J. Sander, Jodi Cooley, M. H. Kelsey, David G. Cerdeño, S. L. Watkins, P. Pakarha, R. Calkins, Enectali Figueroa-Feliciano, R. Ren, D. Barker, J. Winchell, T. Aralis, Bernard Sadoulet, To Chin Yu, E. Lopez Asamar, Seema Verma, Bruce A. Hines, and P. L. Brink

Subjects
Physics, Range (particle radiation), Photon, 010308 nuclear & particles physics, Dark matter, chemistry.chemical_element, Germanium, Electron, Parameter space, Kinetic energy, 01 natural sciences, Nuclear physics, chemistry, 0103 physical sciences, Particle, 010306 general physics
Abstract

We present an analysis of electron recoils in cryogenic germanium detectors operated during the SuperCDMS Soudan experiment. The data are used to set new constraints on the axioelectric coupling of axionlike particles and the kinetic mixing parameter of dark photons, assuming the respective species constitutes all of the galactic dark matter. This study covers the mass range from 40 eV/c2 to 500 keV/c2 for both candidates, excluding previously untested parameter space for masses below ∼1 keV/c2. For the kinetic mixing of dark photons, values below 10−15 are reached for particle masses around 100 eV/c2; for the axioelectric coupling of axionlike particles, values below 10−12 are reached for particles with masses in the range of a few-hundred eV/c2.

Published
2020

4. Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated Above Ground

Author

E. Azadbakht, C. W. Fink, C. Cartaro, R. Mahapatra, M. A. Bowles, S. Banik, Eric W. Hoppe, H. Neog, R. A. Cameron, John L. Orrell, C. Bathurst, R. Calkins, D. A. Bauer, S. S. Poudel, D. MacDonell, V. Novati, M. H. Kelsey, M. Diamond, P. Cushman, P. Lukens, Yu Kai Chang, P. Pakarha, J. K. Nelson, Tarek Saab, N. Mast, L. Wills, J. Winchell, R. Partridge, L. V. S. Bezerra, Fernando Ponce, Ziqing Hong, H. G. Zhang, N. Herbert, H. R. Harris, P. L. Brink, D. W. P. Amaral, L. Zheng, M. J. Wilson, D. J. Sincavage, W. A. Page, Bernard Sadoulet, M. Chaudhuri, Blas Cabrera, J. Street, Martin E. Huber, A. E. Robinson, E. Lopez Asamar, N. Mirabolfathi, É. M. Michaud, Bedangadas Mohanty, A. J. Mayer, A. Li, H. Coombes, Noah Kurinsky, I. J. Arnquist, L. Hsu, J. Sander, T. C. Yu, Sunil Golwala, K. Fouts, A. Jastram, J. D. Morales Mendoza, R. W. Schnee, M. Ghaith, Amy Roberts, D. Toback, Ruth Lawrence, T. Binder, Bruno Serfass, A. Kubik, Matt Pyle, T. Aralis, J. Corbett, J. Camilleri, D. Jardin, Matthew Fritts, H. Meyer Zu Theenhausen, V. K. S. Kashyap, C. Stanford, M. I. Hollister, R. Bhattacharyya, Vuk Mandic, E. Michielin, D. H. Wright, A. Sattari, E. Reid, S. J. Yellin, Tsuguo Aramaki, Enectali Figueroa-Feliciano, R. Ren, F. De Brienne, G. Gerbier, R. Germond, I. Alkhatib, B. A. Hines, S. Zuber, Betty A. Young, Seema Verma, B. von Krosigk, Yu. G. Kolomensky, S. L. Watkins, S. Nagorny, E. Fascione, John Wilson, D. B. MacFarlane, David G. Cerdeño, R. Bunker, Emily Z. Zhang, V. Iyer, R. Chen, R. Podviianiuk, R. Underwood, Ben Loer, Jodi Cooley, A. N. Villano, S. M. Oser, Xingbo Zhao, T. Reynolds, I. Ataee Langroudy, D. Barker, M. L. di Vacri, S. Scorza, W. Rau, N. Chott, and UAM. Departamento de Física Teórica

Subjects
Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Above Grounds, Phonon, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Cryogenic Detectors, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Light Dark Matter, Scattering Cross Section, 0103 physical sciences, Energy Resolutions, Dark Matter Searches, 010306 general physics, Light dark matter, Physics, Dark Matter Particles, 010308 nuclear & particles physics, Scattering, Detector, Resolution (electron density), Física, Instrumentation and Detectors (physics.ins-det), Particle, High Energy Physics::Experiment, Energy (signal processing), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present limits on spin-independent dark matter-nucleon interactions using a $10.6$ $\mathrm{g}$ Si athermal phonon detector with a baseline energy resolution of $\sigma_E=3.86 \pm 0.04$ $(\mathrm{stat.})^{+0.19}_{-0.00}$ $(\mathrm{syst.})$ $\mathrm{eV}$. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle masses from $93$ to $140$ $\mathrm{MeV}/c^2$, with a raw exposure of $9.9$ $\mathrm{g}\cdot\mathrm{d}$ acquired at an above-ground facility. This work illustrates the scientific potential of detectors with athermal phonon sensors with eV-scale energy resolution for future dark matter searches., Comment: 7 pages, 4 figures, this version includes ancillary files from official data release

Published
2020
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5. Erratum: First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector [Phys. Rev. Lett. 121 , 051301 (2018)]

Author

Betty A. Young, C. Cartaro, A. Kennedy, A. Phipps, Blas Cabrera, Chitrasen Jena, E. Fascione, D. H. Wright, Jodi Cooley, J. V. Leyva, Noah Kurinsky, R. Mahapatra, M. H. Kelsey, W. Rau, T. Binder, C. Stanford, Xingbo Zhao, E. Azadbakht, S. Scorza, E. H. Miller, P. L. Brink, Danielle Speller, J. Street, Amy Roberts, S. J. Yellin, Tsuguo Aramaki, P. Di Stefano, A. N. Villano, Matthew Fritts, S. M. Oser, R. Calkins, B. von Krosigk, Vuk Mandic, H. E. Rogers, R. Agnese, H. R. Harris, M. A. Bowles, T. Reynolds, H. Qiu, A. E. Robinson, V. Iyer, P. Lukens, W. A. Page, C. W. Fink, J. Sander, M. Stein, Martin E. Huber, Bruno Serfass, S. L. Watkins, John Wilson, D. Barker, I. J. Arnquist, D. Jardin, D. A. Bauer, S. Banik, Eric W. Hoppe, J. K. Nelson, S. S. Poudel, W. Baker, B. Cornell, T. Doughty, Fernando Ponce, A. Reisetter, L. Hsu, Ziqing Hong, J. D. Morales Mendoza, John L. Orrell, J. So, X. Zhang, N. Mirabolfathi, D. MacDonell, R. Underwood, Bedangadas Mohanty, A. Scarff, D. Toback, Tarek Saab, N. Mast, G. Gerbier, M. J. Wilson, Ben Loer, Hiromasa Tanaka, R. K. Romani, M. Pepin, David G. Cerdeño, T. Aralis, Matt Pyle, M. Ghaith, A. Kubik, Kartik Senapati, R. Partridge, Sunil Golwala, Yen-Yung Chang, J. Winchell, Bernard Sadoulet, Enectali Figueroa-Feliciano, E. Lopez Asamar, Ruth Lawrence, R. Germond, R. Bunker, R. W. Schnee, and P. Cushman

Subjects
Nuclear physics, Physics, Detector, Dark matter, General Physics and Astronomy, Charge (physics)
Abstract

This corrects the article DOI: 10.1103/PhysRevLett.121.051301.

Published
2019
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6. Nuclear-recoil energy scale in CDMS II silicon dark-matter detectors

Author

X. Zhao, T. Binder, G.L. Godfrey, J. D. Morales Mendoza, R. Underwood, Martin E. Huber, Tarek Saab, K. Schneck, N. Mast, E. H. Miller, M. Pepin, R. Germond, Yi Chen, B. Welliver, J. Hall, A. W. Borgland, H. R. Harris, W. A. Page, Amy Roberts, Yu Kai Chang, S. Fallows, A. N. Villano, Betty A. Young, M. Ghaith, A. Kubik, R. W. Schnee, V. Iyer, S. M. Oser, R. Basu Thakur, Miguel Daal, H. A. Tanaka, S. J. Yellin, Tsuguo Aramaki, A. Phipps, Hassan Chagani, David G. Cerdeño, K. L. Page, T. Doughty, P. Lukens, S. Banik, R. Partridge, Robert A. Moffatt, Kevin A. McCarthy, John Wilson, B. Cornell, R. Calkins, E. Fascione, Sunil Golwala, P. Redl, Ziqing Hong, P. L. Brink, M. Stein, David Moore, M. Peñalver Martinez, Adam Anderson, M. J. Wilson, E. M. Dragowsky, J. K. Nelson, Donald J. Holmgren, C. Cartaro, W. Rau, David O. Caldwell, H. E. Rogers, M. A. Bowles, P. Cushman, J. Sander, S. Scorza, Danielle Speller, H. Qiu, P. Di Stefano, R. Agnese, J. Street, D. Balakishiyeva, L. Hsu, D. Toback, Matt Pyle, Bruno Serfass, Kartik Senapati, D. Jardin, R. Mahapatra, A. Leder, R. Bunker, A. Reisetter, D. MacDonell, C. Jena, G. Gerbier, L. Esteban, D. Barker, Jodi Cooley, M. H. Kelsey, D. A. Bauer, S. S. Poudel, W. Baker, J. J. Yen, Matthew Fritts, Vuk Mandic, X. Zhang, N. Mirabolfathi, Bedangadas Mohanty, A. Jastram, A. Kennedy, Blas Cabrera, Enectali Figueroa-Feliciano, E. Lopez Asamar, Noah Kurinsky, B. von Krosigk, Bernard Sadoulet, A. E. Robinson, and Douglas Wright

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Electron, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Recoil, Ionization, 0103 physical sciences, Neutron, Physics::Atomic Physics, 010306 general physics, Nuclear Experiment, Instrumentation and Methods for Astrophysics (astro-ph.IM), Instrumentation, Physics, Elastic scattering, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), 3. Good health, Semiconductor detector, Cryogenic Dark Matter Search, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

The Cryogenic Dark Matter Search (CDMS II) experiment aims to detect dark matter particles that elastically scatter from nuclei in semiconductor detectors. The resulting nuclear-recoil energy depositions are detected by ionization and phonon sensors. Neutrons produce a similar spectrum of low-energy nuclear recoils in such detectors, while most other backgrounds produce electron recoils. The absolute energy scale for nuclear recoils is necessary to interpret results correctly. The energy scale can be determined in CDMS II silicon detectors using neutrons incident from a broad-spectrum $^{252}$Cf source, taking advantage of a prominent resonance in the neutron elastic scattering cross section of silicon at a recoil (neutron) energy near 20 (182) keV. Results indicate that the phonon collection efficiency for nuclear recoils is $4.8^{+0.7}_{-0.9}$% lower than for electron recoils of the same energy. Comparisons of the ionization signals for nuclear recoils to those measured previously by other groups at higher electric fields indicate that the ionization collection efficiency for CDMS II silicon detectors operated at $\sim$4 V/cm is consistent with 100% for nuclear recoils below 20 keV and gradually decreases for larger energies to $\sim$75% at 100 keV. The impact of these measurements on previously published CDMS II silicon results is small., Comment: 22 pages, 17 figures, 1 table, 1 appendix

Published
2018

7. Energy loss due to defect formation from 206Pb recoils in SuperCDMS germanium detectors

Author

I. J. Arnquist, Steve Yellin, D. Toback, Dennis Wright, R. Mahapatra, Nicholas Mast, Andrew Scarff, Todd Doughty, Vijay Iyer, Lauren Hsu, Allison Kennedy, Betty A. Young, Danika MacDonell, Amy Roberts, Dan Jardin, R. Germond, Vuk Mandic, Matt Pyle, P. Cushman, Jorge Morales, A. N. Villano, Dan Bauer, S. M. Oser, John L. Orrell, Matthew Wilson, Kartik Senapati, Francisco Ponce, Alan Robinson, Ryan Underwood, Concetta Cartaro, Belina von Krosigk, Hang Qiu, J. Street, William Page, Brett Cornell, Jodi Cooley, S. L. Watkins, Ben Loer, Andrew Kubik, M. Pepin, Eric W. Hoppe, Hirohisa Tanaka, Michael Bowles, R. Calkins, J. Sander, E. H. Miller, David G. Cerdeño, Angela Reisetter, Xiaohe Zhang, Rusty Harris, T. Aralis, Samir Banik, Jon Wilson, Paul Brink, Eleanor Fascione, N. Mirabolfathi, Bedangadas Mohanty, Wolfgang Rau, Matthew Stein, Blas Cabrera, Richard Lawrence, Elias Lopez-Asamar, Sudip Poudel, Matt Fritts, Bruno Serfass, Silvia Scorza, Chitrasen Jena, Noah Kurinsky, Elham Azadbakht, R. Bunker, Muad Ghaith, D'Ann Barker, Bernard Sadoulet, Hannah Rogers, Philippe Di Stefano, R. W. Schnee, Tyler Reynolds, Sunil Golwala, Yen-Yung Chang, Tom Ren, Jack Nelson, William Baker, R. Partridge, Pat Lukens, Martin E. Huber, Danielle Speller, Ziqing Hong, Gilles Gerbier, C. W. Fink, Michael Kelsey, Tali Figueroa, Robert Agnese, Joshua Winchell, Xuji Zhao, Tsuguo Aramaki, Tarek Saab, and Thomas Binder

Subjects
Energy loss, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, Physics and Astronomy (miscellaneous), Dark matter, FOS: Physical sciences, chemistry.chemical_element, Germanium, Applied Physics (physics.app-ph), 01 natural sciences, 7. Clean energy, Nuclear physics, 0103 physical sciences, 010306 general physics, Nuclear Experiment, Physics, 010308 nuclear & particles physics, Detector, Instrumentation and Detectors (physics.ins-det), Physics - Applied Physics, Threshold energy, chemistry, Frenkel defect, Cryogenic Dark Matter Search, Energy (signal processing), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The Super Cryogenic Dark Matter Search experiment (SuperCDMS) at the Soudan Underground Laboratory studied energy loss associated with Frenkel defect formation in germanium crystals at mK temperatures using in situ $^{210}$Pb sources. We examine the spectrum of $^{206}$Pb nuclear recoils near its expected 103 keV endpoint energy and determine an energy loss of $\left(6.08\pm0.18\right)$ %, which we attribute to defect formation. From this result and using TRIM simulations, we extract the first experimentally determined average displacement threshold energy of $\left(19.7^{+0.6}_{-0.5}\right)$ eV for germanium. This has implications for the analysis thresholds of future germanium-based dark matter searches., 4 Figures, Two data files, One data release description file

Published
2018

8. Production Rate Measurement of Tritium and Other Cosmogenic Isotopes in Germanium with CDMSlite

Author

H. R. Harris, B. Loer, B. Serfass, W. A. Page, S. Scorza, E. Azadbakht, David G. Cerdeño, John L. Orrell, D. MacDonell, C. Cartaro, M. A. Bowles, Enectali Figueroa-Feliciano, R. Calkins, R. Ren, N. Mirabolfathi, Yu Kai Chang, A. N. Villano, S. M. Oser, Jodi Cooley, John Wilson, B. von Krosigk, G. Gerbier, Xingbo Zhao, T. Reynolds, Betty A. Young, J. Winchell, S. J. Yellin, Tsuguo Aramaki, H. E. Rogers, M. Ghaith, A. Kubik, S. L. Watkins, P. Cushman, J. D. Morales Mendoza, A. Kennedy, Blas Cabrera, Chitrasen Jena, H. A. Tanaka, P. L. Brink, Bernard Sadoulet, A. Scarff, H. Qiu, A. E. Robinson, R. Partridge, Matt Pyle, E. Lopez Asamar, Noah Kurinsky, B. Cornell, R. Underwood, D. Barker, T. Aralis, Kartik Senapati, D. Jardin, R. Agnese, Danielle Speller, I. J. Arnquist, Ruth Lawrence, Tarek Saab, N. Mast, P. Lukens, L. Hsu, T. Binder, Sunil Golwala, D. Toback, M. H. Kelsey, D. H. Wright, Ziqing Hong, R. Bunker, M. Stein, C. W. Fink, M. J. Wilson, S. Banik, Eric W. Hoppe, A. Reisetter, Martin E. Huber, W. Rau, Matthew Fritts, R. Germond, Vuk Mandic, J. K. Nelson, J. Sander, R. W. Schnee, M. Pepin, X. Zhang, Bedangadas Mohanty, A. Jastram, D. A. Bauer, S. S. Poudel, W. Baker, Fernando Ponce, E. Fascione, Amy Roberts, T. Doughty, J. Street, R. Mahapatra, V. Iyer, and E. H. Miller

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, Dark matter, chemistry.chemical_element, FOS: Physical sciences, Germanium, Radiation, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Ionization, 0103 physical sciences, Nuclear Experiment (nucl-ex), 010303 astronomy & astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Nuclear Experiment, Physics, Radionuclide, Isotope, 010308 nuclear & particles physics, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Semiconductor detector, chemistry, Tritium, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Future direct searches for low-mass dark matter particles with germanium detectors, such as SuperCDMS SNOLAB, are expected to be limited by backgrounds from radioactive isotopes activated by cosmogenic radiation inside the germanium. There are limited experimental data available to constrain production rates and a large spread of theoretical predictions. We examine the calculation of expected production rates, and analyze data from the second run of the CDMS low ionization threshold experiment (CDMSlite) to estimate the rates for several isotopes. We model the measured CDMSlite spectrum and fit for contributions from tritium and other isotopes. Using the knowledge of the detector history, these results are converted to cosmogenic production rates at sea level. The production rates in atoms/(kg$\cdot$day) are 74$\pm$9 for $^3$H, 1.5$\pm$0.7 for $^{55}$Fe, 17$\pm$5 for $^{65}$Zn, and 30$\pm$18 for $^{68}$Ge., 14 pages, 10 figures, 5 tables. v5 contains the extended data release (and documentation) of the CDMSlite Run 2 data as ancillary files

Published
2018

9. First Dark Matter Constraints from a SuperCDMS Single-Charge Sensitive Detector

Author

C. Stanford, A. N. Villano, S. M. Oser, T. Reynolds, John L. Orrell, R. Underwood, D. MacDonell, B. Cornell, H. R. Harris, J. Street, W. A. Page, John Wilson, A. Scarff, C. Cartaro, P. L. Brink, Hiromasa Tanaka, Ruth Lawrence, E. Fascione, M. Pepin, N. Mirabolfathi, M. Ghaith, A. Kubik, D. Jardin, D. A. Bauer, J. D. Morales Mendoza, Sunil Golwala, S. S. Poudel, T. Doughty, W. Baker, Xingbo Zhao, Tarek Saab, N. Mast, S. Scorza, C. W. Fink, J. K. Nelson, R. Mahapatra, Fernando Ponce, R. Germond, R. W. Schnee, X. Zhang, M. H. Kelsey, B. Loer, B. Serfass, J. V. Leyva, M. Stein, D. Barker, Bedangadas Mohanty, J. Sander, T. Aralis, Amy Roberts, R. Agnese, Martin E. Huber, Betty A. Young, David G. Cerdeño, B. von Krosigk, E. H. Miller, P. Cushman, D. H. Wright, A. Phipps, Yu Kai Chang, R. K. Romani, Jodi Cooley, M. A. Bowles, S. Banik, Eric W. Hoppe, A. Kennedy, Matt Pyle, Blas Cabrera, Chitrasen Jena, T. Binder, S. J. Yellin, Tsuguo Aramaki, Matthew Fritts, Kartik Senapati, E. Azadbakht, Noah Kurinsky, Vuk Mandic, Enectali Figueroa-Feliciano, R. Partridge, R. Calkins, E. Lopez Asamar, V. Iyer, S. L. Watkins, J. Winchell, Bernard Sadoulet, A. E. Robinson, Danielle Speller, P. Lukens, P. Di Stefano, Ziqing Hong, M. J. Wilson, H. E. Rogers, H. Qiu, R. Bunker, A. Reisetter, W. Rau, J. So, G. Gerbier, I. J. Arnquist, L. Hsu, and D. Toback

Subjects
Physics, Photon, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics - Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, Dark matter, General Physics and Astronomy, FOS: Physical sciences, Charge (physics), Instrumentation and Detectors (physics.ins-det), Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, Dark photon, Semiconductor detector, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Excited state, 0103 physical sciences, 010306 general physics, Absorption (electromagnetic radiation), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 gram CDMS HV device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/$\mathrm{c^2}$. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 gram days). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations., 6 pages + title and references, 6 figures, includes erratum submitted to PRL and data release

Published
2018

10. Results from the Super Cryogenic Dark Matter Search Experiment at Soudan

Author

Tarek Saab, N. Mast, A. N. Villano, S. M. Oser, P. L. Brink, C. Cartaro, T. Reynolds, H. R. Harris, D. A. Bauer, W. A. Page, B. Welliver, S. S. Poudel, W. Baker, N. Mirabolfathi, Enectali Figueroa-Feliciano, R. Partridge, A. Kennedy, J. J. Yen, Jodi Cooley, Blas Cabrera, Betty A. Young, B. Cornell, Chitrasen Jena, D. H. Wright, D. Balakishiyeva, A. Phipps, S. Banik, Eric W. Hoppe, J. D. Morales Mendoza, Noah Kurinsky, Xingbo Zhao, A. E. Robinson, Yu Kai Chang, T. Binder, S. Scorza, Matthew Fritts, D. Barker, Bernard Sadoulet, Vuk Mandic, Sunil Golwala, I. J. Arnquist, G. Godfrey, Amy Roberts, P. Di Stefano, Martin E. Huber, M. H. Kelsey, S. J. Yellin, Tsuguo Aramaki, D. Jardin, John Wilson, M. Stein, D. O. Caldwell, L. Hsu, P. Cushman, E. Lopez Asamar, R. Agnese, R. Underwood, D. Toback, J. Hall, Miguel Daal, J. K. Nelson, X. Zhang, M. Peñalver Martinez, Bedangadas Mohanty, Matt Pyle, M. A. Bowles, B. von Krosigk, A. Jastram, Kartik Senapati, J. Sander, Hiromasa Tanaka, John L. Orrell, D. MacDonell, K. Schneck, E. Fascione, M. Pepin, V. Iyer, R. W. Schnee, R. Basu Thakur, K. L. Page, R. Calkins, T. Doughty, H. E. Rogers, H. Qiu, P. Redl, B. Loer, B. Serfass, E. H. Miller, R. Germond, Yi Chen, P. Lukens, Ziqing Hong, M. J. Wilson, Danielle Speller, M. Ghaith, A. Kubik, R. Mahapatra, J. Street, David G. Cerdeño, G. Gerbier, R. Bunker, A. Reisetter, and W. Rau

Subjects
Physics, Particle physics, 010308 nuclear & particles physics, Weakly interacting massive particles, 0103 physical sciences, General Physics and Astronomy, Cryogenic Dark Matter Search, 010306 general physics, 01 natural sciences, Event (particle physics)
Abstract

We report the result of a blinded search for weakly interacting massive particles (WIMPs) using the majority of the SuperCDMS Soudan data set. With an exposure of 1690 kg d, a single candidate event is observed, consistent with expected backgrounds. This analysis (combined with previous Ge results) sets an upper limit on the spin-independent WIMP–nucleon cross section of 1.4×10−44 (1.0×10−44) cm2 at 46 GeV/c2. These results set the strongest limits for WIMP–germanium-nucleus interactions for masses >12 GeV/c2.

Published
2018
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