Negative Ion Drift TPC Development for High-Resolution Tracking --- Final Technical Report
- Univ. of Hawaii, Honolulu, HI (United States)
We have measured the avalanche gain and gain resolution in prototype negative ion drift gas time projection chambers (NID TPCs). Measurements utilizing the fill gas SF6 and gain stages consisting of thick and thin gas electron multipliers (GEMs) were performed. Simulation studies comparing the sensitivity of different TPC charge readout strategies have also been performed. This work is part of the wider international CYGNUS proto-collaboration effort, where we investigate the feasibility of a large-scale nuclear recoil observatory with directional sensitivity to dark matter and neutrinos. Results to date suggest that it will be feasible to construct a cost-effective directional detector with recoil energy threshold and electron discrimination energy threshold below 10 keVee. Such a detector would be able to penetrate the so-called neutrino floor that will soon be limiting non-directional dark matter search experiments.
- Research Organization:
- Univ. of Hawaii, Honolulu, HI (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- DOE Contract Number:
- SC0018034
- OSTI ID:
- 1479623
- Report Number(s):
- DOE-HAWAII-18034
- Country of Publication:
- United States
- Language:
- English
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