Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Performances of a prototype point-contact germanium detector immersed in
  liquid nitrogen for light dark matter search   The CDEX-10 experiment searches for light weakly-interacting massive
particles, a form of dark matter, at the China JinPing underground laboratory,
where approximately 10 kg of germanium detectors are arranged in an array and
immersed in liquid nitrogen. Herein, we report on the experimental apparatus,
detector characterization, and spectrum analysis of one prototype detector.
Owing to the higher rise-time resolution of the CDEX-10 prototype detector as
compared with CDEX-1B, we identified the origin of an observed category of
extremely fast events. For data analysis of the CDEX-10 prototype, we
introduced and applied an improved bulk/surface event discrimination method.
The results of the new method were compared to those of the CDEX-1B spectrum.
Both sets of results showed good consistency in the 0--12 keVee energy range,
except for the 8.0 keV K-shell X-ray peak from the external copper.

22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
19
The categories of this paper are: eess