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Title: RF PLASMA SOURCE FOR A HEAVY ION FUSION INJECTOR

Abstract

We are developing high-current ion sources for Heavy Ion Fusion applications. Our proposed RF plasma source starts with an array of high current density mini-beamlets (of a few mA each at {approx}100 mA/cm{sup 2}) that are kept separated from each other within a set of acceleration grids. After they have gained sufficient kinetic energy (>1.2 MeV), the mini-beamlets are allowed to merge together to form a high current beam (about 0.5 A) with low emittance. Simulations have been done to maximize the beam brightness within the physical constraints of the source. We have performed a series of experiments on an RF plasma source. A 80-kV 20-{micro}s source has produced up to 5 mA of Ar{sup +} in a single beamlet and we measured the emittance of a beamlet, its energy spread, and the fraction of ions in higher charge states. We have also tested a 50-kV 61-hole multi-beamlet array. Two upcoming experiments are being prepared: the first experiment will test full-gradient extraction and transport of 61 beamlets though the first four electrodes, and the second experiment will converge 119 beamlets into an ESQ channel at one-quarter scaled voltage of a 1.6 MV HIF injector.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
15014332
Report Number(s):
UCRL-CONF-204973
Journal ID: ISSN 0168-9002; TRN: US0801217
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Journal Volume: 544; Journal Issue: 1-2; Conference: Presented at: Heavy Ion Fusion Symposium, Princeton, NJ, United States, Jun 07 - Jun 11, 2004
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; 70 PLASMA PHYSICS AND FUSION; ACCELERATION; BRIGHTNESS; CHARGE STATES; CURRENT DENSITY; ELECTRODES; HEAVY IONS; ION SOURCES; KINETIC ENERGY; PLASMA; TRANSPORT

Citation Formats

Westenskow, G A, Grote, D P, Halaxi, E, Kwan, J W, and Waldron, W L. RF PLASMA SOURCE FOR A HEAVY ION FUSION INJECTOR. United States: N. p., 2004. Web. doi:10.1016/j.nima.2005.01.274.
Westenskow, G A, Grote, D P, Halaxi, E, Kwan, J W, & Waldron, W L. RF PLASMA SOURCE FOR A HEAVY ION FUSION INJECTOR. United States. https://doi.org/10.1016/j.nima.2005.01.274
Westenskow, G A, Grote, D P, Halaxi, E, Kwan, J W, and Waldron, W L. Fri . "RF PLASMA SOURCE FOR A HEAVY ION FUSION INJECTOR". United States. https://doi.org/10.1016/j.nima.2005.01.274. https://www.osti.gov/servlets/purl/15014332.
@article{osti_15014332,
title = {RF PLASMA SOURCE FOR A HEAVY ION FUSION INJECTOR},
author = {Westenskow, G A and Grote, D P and Halaxi, E and Kwan, J W and Waldron, W L},
abstractNote = {We are developing high-current ion sources for Heavy Ion Fusion applications. Our proposed RF plasma source starts with an array of high current density mini-beamlets (of a few mA each at {approx}100 mA/cm{sup 2}) that are kept separated from each other within a set of acceleration grids. After they have gained sufficient kinetic energy (>1.2 MeV), the mini-beamlets are allowed to merge together to form a high current beam (about 0.5 A) with low emittance. Simulations have been done to maximize the beam brightness within the physical constraints of the source. We have performed a series of experiments on an RF plasma source. A 80-kV 20-{micro}s source has produced up to 5 mA of Ar{sup +} in a single beamlet and we measured the emittance of a beamlet, its energy spread, and the fraction of ions in higher charge states. We have also tested a 50-kV 61-hole multi-beamlet array. Two upcoming experiments are being prepared: the first experiment will test full-gradient extraction and transport of 61 beamlets though the first four electrodes, and the second experiment will converge 119 beamlets into an ESQ channel at one-quarter scaled voltage of a 1.6 MV HIF injector.},
doi = {10.1016/j.nima.2005.01.274},
url = {https://www.osti.gov/biblio/15014332}, journal = {},
issn = {0168-9002},
number = 1-2,
volume = 544,
place = {United States},
year = {2004},
month = {6}
}

Conference:
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