Beam Energy Scaling of Ion-Induced Electron Yield From K+ Ions Impact on Stainless Steel Surfaces

Author

Covo, M. Kireeff ; Molvik, A. ; Friedman, A. ; Westenskow, G. ; Barnard, J.J. ; Cohen, R. ; Lund, S.M. ; Grote, D. ; Seidl, P. ; Kwan, J.W. ; Baca, D. ; Bieniosek, F. ; Celata, C.M. ; Vay, J.V. ; Vujic, J.L.

Author_Institution

LLNL, Livermore, California 94550, U.S.A., michel@nuc.berkeley.edu

fYear

2005

fDate

16-20 May 2005

Firstpage

2287

Lastpage

2288

Abstract

The cost of accelerators for heavy-ion inertial fusion energy (HIF) can be reduced by using the smallest possible clearance between the beam and the wall from the beamline. This increases beam loss to the walls, generating ion-induced electrons that could be trapped by beam space charge potential into an "electron cloud", which can cause degradation or loss of the ion beam. In order to test the physical mechanism model of ion induced electrons production we have measured the impact of K+ ions with energies up to 400 KeV on stainless steel surfaces near grazing incidence, using the ion source test stand (STS-500) at LLNL. The electron yield will be discussed and compared with experimental measurements from 1 MeV K+ ions in the High-Current Experiment at LBNL.

Keywords

Costs; Electron beams; Electron traps; Fusion power generation; Ion accelerators; Particle beams; Space charge; Steel; Structural beams; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the

Print_ISBN

0-7803-8859-3

Type

conf

DOI

10.1109/PAC.2005.1591085

Filename

1591085