Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Parallel-Plate Waveguides for Terahertz-Driven MeV Electron Bunch
  Compression   We demonstrate the electromagnetic performance of waveguides for femtosecond
electron beam bunch manipulation and compression with strong-field terahertz
(THz) pulses. The compressor structure is a dispersion-free
exponentially-tapered parallel-plate waveguide (PPWG) that can focus
single-cycle THz pulses along one dimension. We show test results of the
tapered PPWG structure using electro-optic sampling (EOS) at the interaction
region with peak fields of at least 300 kV/cm given 0.9 uJ of incoming THz
energy. We also present a modified shorted design of the tapered PPWG for
better beam manipulation and reduced magnetic field as an alternative to a
dual-feed approach. As an example, we demonstrate that with 5 uJ of THz energy,
the PPWG compresses a 2.5 MeV electron bunch by a compression factor of more
than 4 achieving a bunch length of about 18 fs.

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The categories of this paper are: stat
4
The categories of this paper are: cond-mat
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
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The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom