Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $^{22}$Na Activation Level Measurements of Fused Silica Rods in the LHC
  Target Absorber for Neutrals (TAN) Compared to FLUKA Simulations   The Target Absorbers for Neutrals (TANs) are located in a high-intensity
radiation environment inside the tunnel of the Large Hadron Collider (LHC).
TANs are positioned about $140$ m downstream from the beam interaction points.
Seven $40$ cm long fused silica rods with different dopant specifications were
irradiated in the TAN by the Beam RAte of Neutrals (BRAN) detector group during
$p$+$p$ data taking from 2016 to 2018 at the LHC. The peak dose delivered to
the fused silica rods was $18$ MGy. We report measurements of the $^{22}$Na
activation of the fused silica rods carried out at the University of Illinois
at Urbana-Champaign and Argonne National Laboratory. At the end of the
irradiation campaign, the maximum $^{22}$Na activity observed was $A=21$
kBq$/{\rm cm^3}$ corresponding to a density, $\rho= 2.5\times 10^{12} /{\rm
cm^3}$, of $^{22}$Na nuclei. FLUKA Monte Carlo simulations have been performed
by the CERN FLUKA team to estimate $^{22}$Na activities for the irradiated BRAN
rod samples. The simulations reproduce the $^{22}$Na activity profile measured
along the rods, with a 35% underestimation of the experimental measurement
results.

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The categories of this paper are: econ
34
The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: math
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The categories of this paper are: chao-dyn
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The categories of this paper are: astro-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex