Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Low-energy electromagnetic processes affecting free-falling test-mass
  charging for LISA and future space interferometers   Galactic cosmic rays and solar energetic particles charge gold-platinum,
free-falling test masses (TMs) on board interferometers for the detection of
gravitational waves in space. The charging process induces spurious forces on
the test masses that affect the sensitivity of these instruments mainly below
$10^{-3}$ Hz. Geant4 and FLUKA Monte Carlo simulations were carried out to
study the TM charging process on board the LISA Pathfinder mission that
remained into orbit around the Sun-Earth Lagrange point L1 between 2016 and
2017. While a good agreement was observed between simulations and measurements
of the TMs net charging, the shot noise associated with charging fluctuations
of both positive and negative particles resulted 3-4 times higher that
predicted. The origin of this mismatch was attributed to the propagation of
electrons and photons only above 100 eV in the simulations. In this paper,
low-energy electromagnetic processes to be included in the future Monte Carlo
simulations for LISA and LISA-like space interferometers TM charging are
considered. {It is found that electrons and photons below 100 eV give a
contribution to the effective charging comparable to that of the whole sample
of particles above this energy. In particular, for incident protons ionization
contributes twice with respect to low energy kinetic emission and electron
backscattering. The other processes are found to play a negligible role. For
heavy nuclei only sputtering must be considered.

18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
1
The categories of this paper are: cs
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph