Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhanced electron yield from a laser-plasma accelerator using high-Z gas
  jet targets   An investigation of the multi-hundred MeV electron beam yield (charge) form
helium, nitrogen, neon and argon gas jet plasmas in a laser-plasma wakefield
acceleration experiment was carried out. The charge measurement has been made
via imaging the electron beam intensity profile on a fluorescent screen into a
14-bit charge coupled device (CCD) which was cross-calibrated with
nondestructive electronics-based method. Within given laser and plasma
parameters, we found that laser-driven low Z- gas jet targets generate
high-quality and well-collimated electron beams with reasonable yields at the
level of 10-100 pC. On the other hand, filamentary electron beams which were
observed from high-Z gas jets at higher densities reached much higher yield.
Evidences for cluster formation were clearly observed in high-Z gases,
especially in the argon gas jet target where we received the highest yield of ~
3 nC

25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
18
The categories of this paper are: econ
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: adap-org
7
The categories of this paper are: hep-th