Journal of Low Temperature Physics

, Volume 176, Issue 3–4, pp 470–475 | Cite as

Ionization Readout of CDMS Detectors with Low Power, Low Noise HEMTs

  • A. PhippsEmail author
  • Y. Jin
  • B. Sadoulet


We have measured the ionization performance of a CDMS II detector using CNRS/LPN HEMTs as opposed to Si JFETs in the front end electronics. We find no significant difference in ionization resolution when using HEMTs compared to Si JFETs indicating the CNRS/LPN HEMTs can act as a low power, low noise replacement for Si JFETs in cryogenic applications. We present the HEMT DC/AC properties, measured noise in both low impedance and high impedance closed-loop configurations using CDMS electronics, and performance with a CDMS detector exposed to a \(^{241}\)Am source.


HEMTs Ionization readout Dark matter 



This work was supported in part by the Department of Energy and the National Science Foundation.


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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of PhysicsUniversity of CaliforniaBerkeleyUSA
  2. 2.Laboratoire de Photonique et de NanostructuresCNRSMarcoussisFrance

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