Abstract
ULTIMA is a project which proposes to use superfluid 3He as a sensitive medium for direct dark matter search. In this paper we report on new, detailed calibrations of our bolometric cells as a function of the magnetic field. An influence on the order of 20% on the peak height after an energy deposition is observed for magnetic fields up to 330 mT. Simultaneous measurements of neutron capture and heater events, releasing both a well defined energy, show that the effect is similar for both, and that it is possible to maintain a good calibration by an appropriate correction.
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Elbs, J., Bunkov, Y.M., Collin, E. et al. ULTIMA: Magnetic Field Dependence of the Calibration Factor. J Low Temp Phys 151, 860–864 (2008). https://doi.org/10.1007/s10909-008-9756-z
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DOI: https://doi.org/10.1007/s10909-008-9756-z