Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Controlling ion kinetic energy distributions in laser produced plasma
  sources by means of a picosecond pulse pair   The next generation of lithography machines uses extreme ultraviolet (EUV)
light originating from laser-produced plasma (LPP) sources, where a small tin
droplet is ionized by an intense laser pulse to emit the requested light at
13.5 nm. Numerous irradiation schemes have been explored to increase conversion
efficiency (CE), out of which a double-pulse approach comprising a weak
picosecond Nd:YAG pre-pulse followed by a powerful pulse is considered to be
very promising [1]. Nevertheless, even for such CE-optimized schemes, ion
debris ejected from the plasma with kinetic energies up to several keV remain a
factor that hampers the maximum performance of LPP sources. In this letter we
propose a novel pre-pulse scheme consisting of a picosecond pulse pair at 1064
nm, which decreases the amount of undesirable fast ions, avoids
back-reflections to the lasers and enables one to tailor the target shape.

29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
33
The categories of this paper are: plasm-ph
9
The categories of this paper are: nlin
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
16
The categories of this paper are: stat
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat