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Title: Time-dependent degradation of an ion-focused ATA beam

Abstract

We have made detailed measurements of the time-dependent beam quality of an ATA pulse transported on a KrF laser-photoionized benzene channel. We have found that the tail portion (/tau/ greater than or equal to 20--30 ns) of the pulse becomes severely degraded both at high currents (I > 3 kA) and at long transport distances. Non-axisymmetric channel ion motion is suspected as the predominant source of the problem. We discuss various experiments which varied laser properties (timing, fluence, profiles), background ion pressure, and electron beam current in order to study the physics behind this degradation. 4 refs., 2 figs.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
6157282
Report Number(s):
UCRL-99590; CONF-890335-56
ON: DE89009968
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 13. particle accelerator conference, Chicago, IL, USA, 20 Mar 1989; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; LINEAR ACCELERATORS; BEAM DYNAMICS; BEAM CURRENTS; ELECTRON BEAMS; FREE ELECTRON LASERS; KRYPTON FLUORIDE LASERS; LASER GUIDANCE; TIME DEPENDENCE; ACCELERATORS; BEAMS; CURRENTS; EXCIMER LASERS; GAS LASERS; LASERS; LEPTON BEAMS; PARTICLE BEAMS; 430200* - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics

Citation Formats

Fawley, W. M., Boyd, J. K., Caporaso, G. J., Chambers, F. W., Chong, Y. P., Hildum, J. S., Lee, P., Orzechowski, T. J., Rogers, D. R., and Struve, K. W. Time-dependent degradation of an ion-focused ATA beam. United States: N. p., 1989. Web. doi:10.1109/PAC.1989.73489.
Fawley, W. M., Boyd, J. K., Caporaso, G. J., Chambers, F. W., Chong, Y. P., Hildum, J. S., Lee, P., Orzechowski, T. J., Rogers, D. R., & Struve, K. W. Time-dependent degradation of an ion-focused ATA beam. United States. doi:10.1109/PAC.1989.73489.
Fawley, W. M., Boyd, J. K., Caporaso, G. J., Chambers, F. W., Chong, Y. P., Hildum, J. S., Lee, P., Orzechowski, T. J., Rogers, D. R., and Struve, K. W. Mon . "Time-dependent degradation of an ion-focused ATA beam". United States. doi:10.1109/PAC.1989.73489. https://www.osti.gov/servlets/purl/6157282.
@article{osti_6157282,
title = {Time-dependent degradation of an ion-focused ATA beam},
author = {Fawley, W. M. and Boyd, J. K. and Caporaso, G. J. and Chambers, F. W. and Chong, Y. P. and Hildum, J. S. and Lee, P. and Orzechowski, T. J. and Rogers, D. R. and Struve, K. W.},
abstractNote = {We have made detailed measurements of the time-dependent beam quality of an ATA pulse transported on a KrF laser-photoionized benzene channel. We have found that the tail portion (/tau/ greater than or equal to 20--30 ns) of the pulse becomes severely degraded both at high currents (I > 3 kA) and at long transport distances. Non-axisymmetric channel ion motion is suspected as the predominant source of the problem. We discuss various experiments which varied laser properties (timing, fluence, profiles), background ion pressure, and electron beam current in order to study the physics behind this degradation. 4 refs., 2 figs.},
doi = {10.1109/PAC.1989.73489},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {3}
}

Conference:
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