Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pre-launch characterization of the spectrometer of Hard X-ray Imager
  (HXI) onboard the ASO-S mission   As one of the three payloads of the Advanced Space-based Solar Observatory
(ASO-S), the pre-launch characterization of HXI includes the characterization
of the collimator and the spectrometer. This article focuses on the pre-launch
characterization of HXI's spectrometer, including detection efficiency, energy
resolution, and energy to ADC channel (E-C) relationship. The detection
efficiency characterization necessitates a sufficient number of calibrated
energy points in the HXI observation energy range, with a refined measurement
around the absorption edge of the lanthanum bromide crystal, and is calibrated
with an X-ray beam. The characterization results are consistent with the
simulations and show that the detection efficiency difference between detector
modules is controlled within $\pm3\%$. Radioactive sources $^{133}\textrm{Ba}$
and $^{137}\textrm{Cs}$ are used to calibrate the energy resolution and E-C
relationship. The characterization results show that all detector modules'
energy resolutions are better than $26\%$ at 32 keV, meeting the design
specification. And their E-C relationships vary regularly with voltage. All of
the characterization results indicate that the flight model of the HXI
spectrometer meets the performance requirements and is capable of performing
on-orbit observation activities.

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The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga