Surface-sensitive macrobolometers for the identification of external charged particles

Details Surface-sensitive macrobolometers for the identification of external charged particles Surface-sensitive macrobolometers for the identification of external charged particles

2009-09-04

arxiv.org/abs/0909.0806v1

Appl.Phys.Lett.86:134106,2005

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

10.1063/1.1894608

We report the performance of two prototype TeO2 macrobolometers, operated at ~25 mK, able to identify events due to energy deposited at the detector surface. This capability is obtained by thermally coupling thin Ge active layers to the main energy absorber of the bolometer, and is demonstrated by irradiating the detectors with alpha particles. The temperature variations of the main absorber and of the active layer are measured independently with doped Ge thermistors. These results show clearly that an intrinsic limitation of monolithic low temperature calorimeters, e.g., the impossibility to give information about event position, can be efficiently overcome using composite structures.

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