Time evolution of electric fields in CDMS detectors

S. W. Leman; D. Brandt; P. L. Brink; B. Cabrera; H. Chagani; M. Cherry; P. Cushman; E. Do Couto E Silva; T. Doughty; E. Figueroa-Feliciano; V. Mandic; K. A. McCarthy; N. Mirabolfathi; M. Pyle; A. Reisetter; R. Resch; B. Sadoulet; B. Serfass; K. M. Sundqvist; A. Tomada; B. A. Young; J. Zhang

doi:10.1007/s10909-012-0465-2

Time evolution of electric fields in CDMS detectors

S. W. Leman, D. Brandt, P. L. Brink, B. Cabrera, H. Chagani, M. Cherry, P. Cushman, E. Do Couto E Silva, T. Doughty, E. Figueroa-Feliciano, V. Mandic, K. A. McCarthy, N. Mirabolfathi, M. Pyle, A. Reisetter, R. Resch, B. Sadoulet, B. Serfass, K. M. Sundqvist, A. TomadaB. A. Young, J. Zhang

Physics and Astronomy (Twin Cities)

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

The Cryogenic Dark Matter Search (CDMS) utilizes large mass, 3'' diameter×1'' thick target masses as particle detectors. The target is instrumented with both phonon and ionization sensors, the later providing a ∼1 Vcm^-1 electric field in the detector bulk. Cumulative radiation exposure which creates ∼200 × 106 electron-hole pairs could be sufficient to produce a comparable reverse field in the detector thereby degrading the ionization channel performance, if it was not shielded by image charges on the electrodes. To study this, the existing CDMS detector Monte Carlo has been modified to allow for an event by event evolution of the bulk electric field, in three spatial dimensions. Surprisingly, this simple model is not sufficient to explain the degradation of detector performance. Our most recent results and interpretation are discussed.

Original language	English (US)
Pages (from-to)	1099-1105
Number of pages	7
Journal	Journal of Low Temperature Physics
Volume	167
Issue number	5-6
DOIs	https://doi.org/10.1007/s10909-012-0465-2
State	Published - Jun 2012

Bibliographical note

Funding Information:
Acknowledgements This work is supported in part by the United States National Science Foundation (under Grant Nos. PHY-0847342, 0705052 , 0902182 and 1004714) and the United States Department of Energy (under contract DE-AC02-76SF00515).

Keywords

Charge transport
Cryogenic
Dark matter search
Germanium

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Leman, S. W., Brandt, D., Brink, P. L., Cabrera, B., Chagani, H., Cherry, M., Cushman, P., Do Couto E Silva, E., Doughty, T., Figueroa-Feliciano, E., Mandic, V., McCarthy, K. A., Mirabolfathi, N., Pyle, M., Reisetter, A., Resch, R., Sadoulet, B., Serfass, B., Sundqvist, K. M., ... Zhang, J. (2012). Time evolution of electric fields in CDMS detectors. Journal of Low Temperature Physics, 167(5-6), 1099-1105. https://doi.org/10.1007/s10909-012-0465-2

Leman, SW, Brandt, D, Brink, PL, Cabrera, B, Chagani, H, Cherry, M, Cushman, P, Do Couto E Silva, E, Doughty, T, Figueroa-Feliciano, E, Mandic, V, McCarthy, KA, Mirabolfathi, N, Pyle, M, Reisetter, A, Resch, R, Sadoulet, B, Serfass, B, Sundqvist, KM, Tomada, A, Young, BA & Zhang, J 2012, 'Time evolution of electric fields in CDMS detectors', Journal of Low Temperature Physics, vol. 167, no. 5-6, pp. 1099-1105. https://doi.org/10.1007/s10909-012-0465-2

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abstract = "The Cryogenic Dark Matter Search (CDMS) utilizes large mass, 3'' diameter×1'' thick target masses as particle detectors. The target is instrumented with both phonon and ionization sensors, the later providing a ∼1 Vcm-1 electric field in the detector bulk. Cumulative radiation exposure which creates ∼200 × 106 electron-hole pairs could be sufficient to produce a comparable reverse field in the detector thereby degrading the ionization channel performance, if it was not shielded by image charges on the electrodes. To study this, the existing CDMS detector Monte Carlo has been modified to allow for an event by event evolution of the bulk electric field, in three spatial dimensions. Surprisingly, this simple model is not sufficient to explain the degradation of detector performance. Our most recent results and interpretation are discussed.",

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note = "Funding Information: Acknowledgements This work is supported in part by the United States National Science Foundation (under Grant Nos. PHY-0847342, 0705052 , 0902182 and 1004714) and the United States Department of Energy (under contract DE-AC02-76SF00515).",

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AU - Cherry, M.

AU - Cushman, P.

AU - Do Couto E Silva, E.

AU - Doughty, T.

AU - Figueroa-Feliciano, E.

AU - Mandic, V.

AU - McCarthy, K. A.

AU - Mirabolfathi, N.

AU - Pyle, M.

AU - Reisetter, A.

AU - Resch, R.

AU - Sadoulet, B.

AU - Serfass, B.

AU - Sundqvist, K. M.

AU - Tomada, A.

AU - Young, B. A.

AU - Zhang, J.

N1 - Funding Information: Acknowledgements This work is supported in part by the United States National Science Foundation (under Grant Nos. PHY-0847342, 0705052 , 0902182 and 1004714) and the United States Department of Energy (under contract DE-AC02-76SF00515).

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N2 - The Cryogenic Dark Matter Search (CDMS) utilizes large mass, 3'' diameter×1'' thick target masses as particle detectors. The target is instrumented with both phonon and ionization sensors, the later providing a ∼1 Vcm-1 electric field in the detector bulk. Cumulative radiation exposure which creates ∼200 × 106 electron-hole pairs could be sufficient to produce a comparable reverse field in the detector thereby degrading the ionization channel performance, if it was not shielded by image charges on the electrodes. To study this, the existing CDMS detector Monte Carlo has been modified to allow for an event by event evolution of the bulk electric field, in three spatial dimensions. Surprisingly, this simple model is not sufficient to explain the degradation of detector performance. Our most recent results and interpretation are discussed.

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Time evolution of electric fields in CDMS detectors

Abstract

Bibliographical note

Keywords

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