Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emittance growth in the DARHT Axis-II Downstream Transport   Using a particle-in-cell (PIC) code, we investigated the possibilities for
emittance growth through the quadrupole magnets of the system used to transport
the high-current electron beam from an induction accelerator to the
bremsstrahlung converter target used for flash radiography. We found that even
highly mismatched beams exhibited little emittance growth (< 6%), which we
attribute to softening of their initial hard edge current distributions. We
also used this PIC code to evaluate the accuracy of emittance measurements
using a solenoid focal scan following the quadrupole magnets. If the beam is
round after the solenoids, the simulations indicate that the measurement is
highly accurate, but it is substantially inaccurate for elliptical beams.

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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: supr-con
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: alg-geom