Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Commissioning of the laser-driven ion acceleration beamline at the
  Centre for Advanced Laser Applications   The Centre for Advanced Laser Applications (CALA) in Garching near Munich
features the ATLAS 3000 laser system, which can deliver up to 3\,PW within a
pulse length of 20\,fs. It is the driver for the Laser-driven ION (LION)
beamline, which aims to accelerate protons and carbons for applications. For
commissioning, we currently operate with 5\,J on target in 28\,fs. A
$20\degree$ off-axis parabolic mirror focuses the 28\,cm diameter laser-beam
down to a micrometer-sized spot, where a vacuum-compatible wave-front sensor is
used in combination with a deformable mirror for focus optimization. The
nano-Foil Target Positioning System (nFTPS) can replace targets with a
repetition rate of up to 0.5\,Hz and store up to 19 different target foils. A
dipole magnet in a wide-angle spectrometer configuration deflects ions onto a
CMOS detector for an online read-out. Commissioning started mid 2019 with
regular proton acceleration using nm-thin plastic foils as targets. Since then
proton cut-off energies above 20\,MeV have been regularly achieved. The amount
of light traveling backwards from the experiment into the laser is constantly
monitored and 5\,J on target have been determined as the current limit to
prevent damage in the laser. Protons with a kinetic energy of 12\,MeV are
stably accelerated with the given laser parameters and are suitable for
transport with permanent magnet quadrupoles towards our application platform.
We have performed parameter scans varying target thicknesses to optimize for
highest and most stable proton numbers at 12\,MeV kinetic energy, and
investigated shot-to-shot particle number stability for the best parameters.

37
The categories of this paper are: supr-con
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
14
The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat