Effect of stimulated and thermal desorption in DARHT-2

Author

Hughes, T.P. ; Davis, H.

Author_Institution

Mission Res. Corp., Albuquerque, NM, USA

Volume

1

fYear

2003

fDate

12-16 May 2003

Firstpage

120

Abstract

The DARHT-2 accelerator generates a 2 kA, 18 MeV, 2 μsec flat-top electron beam. The beam risetime is about 700 ns, and a "beam cleanup zone" (BCUZ) has been designed to scrape off these mismatched electrons. Experiments on DARHT-1 (which has a 60 ns flat-top) have provided excellent quantitative data on stimulated and thermal desorption of neutral monolayers on various metal surfaces by multi-MeV electrons. We have used these data in the particle-in-cell code UP to model the production of ions from the walls of the DARHT-2 BCUZ. The effect of these ions on the transport of the main beam pulse is discussed.

Keywords

collective accelerators; electron accelerators; electron stimulated desorption; linear accelerators; particle beam diagnostics; thermally stimulated desorption; 18 MeV; 2 kA; 2 mus; 60 ns; DARHT-2; beam cleanup zone; beam risetime; flat-top electron beam; mismatched electrons; multi-MeV electrons; neutral monolayers; stimulated desorption; thermal desorption; Acceleration; Computational modeling; Electron accelerators; Electron beams; Ion accelerators; Particle accelerators; Particle beams; Power transmission lines; Solid modeling; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the

ISSN

1063-3928

Print_ISBN

0-7803-7738-9

Type

conf

DOI

10.1109/PAC.2003.1288856

Filename

1288856