Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multi-MeV electron acceleration by sub-terawatt laser pulses   We demonstrate laser-plasma acceleration of high charge electron beams to the
~10 MeV scale using ultrashort laser pulses with as little energy as 10 mJ.
This result is made possible by an extremely dense and thin hydrogen gas jet.
Total charge up to ~0.5 nC is measured for energies >1 MeV. Acceleration is
correlated to the presence of a relativistically self-focused laser filament
accompanied by an intense coherent broadband light flash, associated with
wavebreaking, which can radiate more than ~3% of the laser energy in a
sub-femtosecond bandwidth consistent with half-cycle optical emission. Our
results enable truly portable applications of laser-driven acceleration, such
as low dose radiography, ultrafast probing of matter, and isotope production.

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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: bayes-an
15
The categories of this paper are: nucl-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
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The categories of this paper are: eess
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: q-bio
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The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org