Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Emittance self-compensation in blow-out mode   We report an unusual regime of emittance self-compensation in an electron
bunch generated in blow-out mode by a radio-frequency photocathode gun.
Simulations clearly show an initial growth and a subsequent self-compensation
of projected emittance in a divergent electron bunch originating from the
effects of: (i) strong space-charge forces of mirror charges on the cathode,
(ii) an energy chirp in the bunch and (iii) substantial re-shaping of the
electron bunch. Furthermore, we show analytically and numerically how a complex
interplay between these effects leads to emittance self-compensation in free
space -- the effect that is normally observed only in a focusing magnetic
field.

16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
2
The categories of this paper are: math
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph