Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies of Beam Optics and Scattering in the Next Linear Collider
  Post-Linac Collimation System   We present a new conceptual and optical design for the Next Linear Collider
post-linac collimation system. Energy collimation and passive protection
against off-energy beams are achieved in a system with large horizontal
dispersion and vertical betatron functions. Betatron collimation is performed
in a relatively low-beta (FODO-like) lattice in which only thin spoilers
intercept particles near the beam core, while thick absorbers maintain a large
stay-clear from the beam. Two possible schemes for the spoilers are considered:
one in which the spoilers are capable of tolerating a certain number of
damaging interceptions per collider run ("consumable" spoilers), and one in
which the spoilers are potentially damaged on every machine pulse and are
self-repairing ("renewable" spoilers). The collimation efficiency of the system
is evaluated, considering both halo particles which are rescattered into the
beam and muon secondaries which are passed to the interaction region. We
conclude that the new design is a promising candidate for the NLC post-linac
system.

5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
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The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: adap-org