Physics – Instrumentation and Detectors
Scientific paper
2006-11-28
Nucl.Instrum.Meth.A574:264-271,2007
Physics
Instrumentation and Detectors
17 pages, submitted to Nuc. Instr. Meth. A
Scientific paper
10.1016/j.nima.2007.01.180
We report on the calibration of a superfluid $^3$He bolometer developed for the search of non-baryonic Dark Matter. Precise thermometry is achieved by the direct measurement of thermal excitations using Vibrating Wire Resonators (VWRs). The heating pulses for calibration were produced by the direct quantum process of quasiparticle generation by other VWRs present. The bolometric calibration factor is analyzed as a function of temperature and excitation level of the sensing VWR. The calibration is compared to bolometric measurements of the nuclear neutron capture reaction and heat depositions by cosmic muons and low energy electrons. The comparison allows a quantitative estimation of the ultra-violet scintillation rate of irradiated helium, demonstrating the possibility of efficient electron recoil event rejection.
Bunkov Yu. M.
Collin Eddy
Elbs Johannes
Godfrin Henri
Krusius M.
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