Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Simulation study of light transport in laser-processed LYSO:Ce detectors
  with single-side readout   A tightly focused pulsed laser can locally modify the crystal structure
inside the bulk of a scintillator. The result is incorporation of so-called
optical barriers with a refractive index (RI) different from that of the
crystal bulk, that can be used to redirect the scintillation light and control
the light spread in the detector. We systematically study the scintillation
light transport in detectors fabricated using the Laser Induced Optical Barrier
technique, and objectively compare their potential performance characteristics
with the two mainstream detector types: monolithic and mechanically pixelated
arrays. Among countless optical barrier patterns, we explore barriers arranged
in a pixel-like pattern extending all-way or half-way through a 20 mm thick
LYSO:Ce crystal. We analyze the performance of the detectors coupled to MPPC
arrays, in terms of light response functions, position histograms, line
profiles, and light collection efficiency. Our results show that
laser-processed detectors constitute a new detector category with a behavior
between the two standard detector types. When the barrier-crystal interface is
smooth, no DOI information can be obtained regardless of barrier RI. However,
with a rough barrier-crystal interface we can extract multiple DOI levels.
Lower barrier RI results in larger light confinement, leading to better
transverse resolution. Laser-processed crystals can also potentially increase
the light collection efficiency, which could lead to improved energy resolution
and timing resolution due to higher signals. For a laser-processed detector
with smooth barrier-crystal interfaces the light collection efficiency is
simulated to >44%, and for rough interfaces >73%. The numbers for a monolithic
crystal is 39% with polished surfaces, and 71% with rough surfaces, and for a
mechanically pixelated array 33% with polished pixel surfaces and 51% with
rough surfaces.

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The categories of this paper are: cmp-lg
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The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
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The categories of this paper are: adap-org
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: q-fin