ULTIMA: Magnetic field dependence of the calibration factor

被引：2
|
作者：
Elbs, Johannes [1 ]
Bunkov, Yuriy M. [1 ]
Collin, Eddy [1 ]
Godfrin, Henri [1 ]
Suvorova, Olga [2 ]
Winkelmann, Clemens B. [1 ]
机构：
[1] CNRS UJF, Inst Neel, F-38042 Grenoble, France
[2] RAS, Inst Nucl Res, Moscow 117312, Russia
来源：
JOURNAL OF LOW TEMPERATURE PHYSICS | 2008年 / 151卷 / 3-4期
关键词：
superfluid He-3; bolometry; magnetic field dependence;
D O I：
10.1007/s10909-008-9756-z
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
ULTIMA is a project which proposes to use superfluid He-3 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.
引用
收藏
页码：860 / 864
页数：5
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