Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Kelvin Probe Studies of Cesium Telluride Photocathode for AWA
  Photoinjector   Cesium telluride is an important photocathode as an electron source for
particle accelerators. It has a relatively high quantum efficiency (>1%), is
sufficiently robust in a photoinjector, and has a long lifetime. This
photocathode is grown in-house for a new Argonne Wakefield Accelerator (AWA)
beamline to produce high charge per bunch (~50 nC) in a long bunch train. Here,
we present a study of the work function of cesium telluride photocathode using
the Kelvin Probe technique. The study includes an investigation of the
correlation between the quantum efficiency and the work function, the effect of
photocathode aging, the effect of UV exposure on the work function, and the
evolution of the work function during and after photocathode rejuvenation via
heating.

30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
1
The categories of this paper are: cs
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
2
The categories of this paper are: math