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Title: Experimental study of the transport limits of intense heavy ionbeams in the HCX

Abstract

The High Current Experiment (HCX) at Lawrence Berkeley National Laboratory is part of the US program to explore heavy-ion beam transport at a scale representative of the low-energy end of an induction linac driver for fusion energy production. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge-dominated heavy-ion beams at high space-charge intensity (line charge density up to {approx} 0.2 {micro}C/m) over long pulse durations (4 {micro}s) in alternating gradient focusing lattices of electrostatic or magnetic quadrupoles. The experiment also contributes to the practical baseline knowledge of intense beam manipulations necessary for the design, construction and operation of a heavy ion driver for inertial fusion. This experiment is testing transport issues resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and beam steering, matching, image charges, halo, electron cloud effects, and longitudinal bunch control. We first present the results for a coasting 1 MeV K{sup +} ion beam transported through the first ten electrostatic transport quadrupoles, measured with optical beam-imaging and double-slit phase-space diagnostics. This includes studies at two different radial fill factors (60% and 80%), for which the beam transverse distribution was characterized in detail. Additionally, beam energymore » measurements will be shown. We then discuss the first results of beam transport through four pulsed room-temperature magnetic quadrupoles (located downstream of the electrostatic quadrupoles), where the beam dynamics become more sensitive to the presence of secondary electrons.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Ernest Orlando Lawrence Berkeley NationalLaboratory, Berkeley, CA (US)
Sponsoring Org.:
USDOE Director. Office of Science. Office of Fusion EnergySciences
OSTI Identifier:
861351
Report Number(s):
LBNL-55961; HIFAN 1351
R&D Project: Z41003; BnR: AT5015031; TRN: US0600316
DOE Contract Number:  
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 15th International Symposium on Heavy IonInertial Fusion, Princeton, NJ, June 7-11, 2004
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 43 PARTICLE ACCELERATORS; APERTURES; BEAM DYNAMICS; BEAM TRANSPORT; CHARGE DENSITY; ELECTROSTATICS; FILL FACTORS; HEAVY IONS; ION BEAMS; LINEAR ACCELERATORS; PHASE SPACE; QUADRUPOLES; SPACE CHARGE; THERMONUCLEAR REACTORS; TRANSPORT

Citation Formats

Prost, L.R., Bieniosek, F.M., Celata, C.M., Dugan, C.C., Faltens,A., Seidl, P.A., Waldron, W.L., Cohen, R., Friedman, A., Kireeff Covo,M., Lund, S.M., Molvik, A.W., and Haber, I. Experimental study of the transport limits of intense heavy ionbeams in the HCX. United States: N. p., 2004. Web.
Prost, L.R., Bieniosek, F.M., Celata, C.M., Dugan, C.C., Faltens,A., Seidl, P.A., Waldron, W.L., Cohen, R., Friedman, A., Kireeff Covo,M., Lund, S.M., Molvik, A.W., & Haber, I. Experimental study of the transport limits of intense heavy ionbeams in the HCX. United States.
Prost, L.R., Bieniosek, F.M., Celata, C.M., Dugan, C.C., Faltens,A., Seidl, P.A., Waldron, W.L., Cohen, R., Friedman, A., Kireeff Covo,M., Lund, S.M., Molvik, A.W., and Haber, I. Tue . "Experimental study of the transport limits of intense heavy ionbeams in the HCX". United States. https://www.osti.gov/servlets/purl/861351.
@article{osti_861351,
title = {Experimental study of the transport limits of intense heavy ionbeams in the HCX},
author = {Prost, L.R. and Bieniosek, F.M. and Celata, C.M. and Dugan, C.C. and Faltens,A. and Seidl, P.A. and Waldron, W.L. and Cohen, R. and Friedman, A. and Kireeff Covo,M. and Lund, S.M. and Molvik, A.W. and Haber, I.},
abstractNote = {The High Current Experiment (HCX) at Lawrence Berkeley National Laboratory is part of the US program to explore heavy-ion beam transport at a scale representative of the low-energy end of an induction linac driver for fusion energy production. The primary mission of this experiment is to investigate aperture fill factors acceptable for the transport of space-charge-dominated heavy-ion beams at high space-charge intensity (line charge density up to {approx} 0.2 {micro}C/m) over long pulse durations (4 {micro}s) in alternating gradient focusing lattices of electrostatic or magnetic quadrupoles. The experiment also contributes to the practical baseline knowledge of intense beam manipulations necessary for the design, construction and operation of a heavy ion driver for inertial fusion. This experiment is testing transport issues resulting from nonlinear space-charge effects and collective modes, beam centroid alignment and beam steering, matching, image charges, halo, electron cloud effects, and longitudinal bunch control. We first present the results for a coasting 1 MeV K{sup +} ion beam transported through the first ten electrostatic transport quadrupoles, measured with optical beam-imaging and double-slit phase-space diagnostics. This includes studies at two different radial fill factors (60% and 80%), for which the beam transverse distribution was characterized in detail. Additionally, beam energy measurements will be shown. We then discuss the first results of beam transport through four pulsed room-temperature magnetic quadrupoles (located downstream of the electrostatic quadrupoles), where the beam dynamics become more sensitive to the presence of secondary electrons.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2004},
month = {6}
}

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