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Title: Lifetime test on a high-performance dc microwave proton source

Abstract

Powerful CW proton linear accelerators (100 mA at 0.5--1 GeV) are being proposed for spallation neutron source applications.These production accelerators require high availability and reliability. A microwave proton source, which has already demonstrated several key beam requirements, was operated for one week (170 hours) in a dc mode to test the reliability and lifetime of its plasma generator. The source was operated with 570 W of microwave (2.45 GHz) discharge power and with a 47-kV extraction voltage. This choice of operating parameters gave a proton current density of 250-mA/cm{sup 2} at 83% proton fraction, which is sufficient for a conservative dc injector design. The beam current was 60--65 mA over most of the week, and was sufficiently focused for RFQ injection. Total beam availability, defined as 47-keV beam-on time divided by elapsed time, was 96.2%. Spark downs in the high voltage column and a gas flow control problem caused all the downtime; no plasma generator failures were observed.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
79116
Report Number(s):
LA-UR-95-1506; CONF-950512-108
ON: DE95011989; TRN: 95:016263
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995; Other Information: PBD: [1995]
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; PROTON SOURCES; TESTING; NEUTRON SOURCES; MICROWAVE EQUIPMENT; SPALLATION; SERVICE LIFE; BEAM EMITTANCE; HYDROGEN IONS 1 PLUS; PROTON BEAMS

Citation Formats

Sherman, J D, Hodgkins, D J, Lara, P D, Schneider, J D, and Stevens, Jr, R R. Lifetime test on a high-performance dc microwave proton source. United States: N. p., 1995. Web.
Sherman, J D, Hodgkins, D J, Lara, P D, Schneider, J D, & Stevens, Jr, R R. Lifetime test on a high-performance dc microwave proton source. United States.
Sherman, J D, Hodgkins, D J, Lara, P D, Schneider, J D, and Stevens, Jr, R R. 1995. "Lifetime test on a high-performance dc microwave proton source". United States. https://www.osti.gov/servlets/purl/79116.
@article{osti_79116,
title = {Lifetime test on a high-performance dc microwave proton source},
author = {Sherman, J D and Hodgkins, D J and Lara, P D and Schneider, J D and Stevens, Jr, R R},
abstractNote = {Powerful CW proton linear accelerators (100 mA at 0.5--1 GeV) are being proposed for spallation neutron source applications.These production accelerators require high availability and reliability. A microwave proton source, which has already demonstrated several key beam requirements, was operated for one week (170 hours) in a dc mode to test the reliability and lifetime of its plasma generator. The source was operated with 570 W of microwave (2.45 GHz) discharge power and with a 47-kV extraction voltage. This choice of operating parameters gave a proton current density of 250-mA/cm{sup 2} at 83% proton fraction, which is sufficient for a conservative dc injector design. The beam current was 60--65 mA over most of the week, and was sufficiently focused for RFQ injection. Total beam availability, defined as 47-keV beam-on time divided by elapsed time, was 96.2%. Spark downs in the high voltage column and a gas flow control problem caused all the downtime; no plasma generator failures were observed.},
doi = {},
url = {https://www.osti.gov/biblio/79116}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1995},
month = {5}
}

Conference:
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