Status and Prospects of the EDELWEISS-III Direct WIMP Search Experiment

Juillard, A.

doi:10.1007/s10909-016-1493-0

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…The Cryogenic Dark Matter Search (CDMS) [1,2,3,4] and EDELWEISS [5,6,7,8] experiments have been setting competitive direct detection dark matter limits using semiconductor radiation detectors operating at sub-Kelvin temperatures for over a decade. These high purity germanium detectors have the ability to distinguish between electromagnetic background and nuclear recoil events caused by Weakly Interacting Massive Particles (WIMPs) through the simultaneous measurement of ionization and phonons produced by an interacting particle.…”

Section: Introductionmentioning

confidence: 99%

A HEMT-based cryogenic charge amplifier with sub-100 eVee ionization resolution for massive semiconductor dark matter detectors

Phipps

Juillard

Sadoulet

et al. 2019

Nuclear Instruments and Methods in Physics Research Section A:

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We present the design and noise performance of a fully cryogenic (T=4 K) HEMT-based charge amplifier for readout of massive semiconductor dark matter detectors operating at sub-Kelvin temperatures. The amplifier has been developed to allow direct detection experiments such as CDMS and EDELWEISS to probe WIMP masses below 10 GeV/c 2 while retaining electromagnetic background discrimination. The amplifier dissipates only 1 mW of power and has a measured noise performance three times better than traditional JFET-based charge amplifiers. The predicted ionization energy resolution using the measured intrinsic amplifier noises and typical detector characteristics is σ E ≈ 100 eV ee (33 electrons). We have measured a calibrated baseline energy resolution of σ E = 91 eV ee when coupled to a live CDMS-II detector. To our knowledge, this is the best resolution achieved on such massive (≈150 pF capacitance) radiation detectors.

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