Scaling cryogenic Germanium-based dark matter detectors to probe smaller WIMP-nucleon cross-sections poses significant challenges in the forms of increased labor, cold hardware, warm electronics and heat load. The development of larger crystals alleviates these issues. The results of ionization tests with two 100 mm diameter, 33 mm thick cylindrical detector-grade Germanium crystals are presented here. Through these results the potential of using such crystals in the Super Cryogenic Dark Matter Search (SuperCDMS) SNOLAB experiment is demonstrated.
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Acknowledgements This work is supported in part by the National Science Foundation (Grant Nos. PHY-0705052, PHY-0902182 & PHY-1004714) and the Department of Energy (Contracts DE-AC02-07CH00359, DE-AC02-76SF00515 & DOE-ER-40823-2500).
- Charge transport
- Dark matter detectors
- Germanium crystals