Lifetime test on a high-performance dc microwave proton source

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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 ... continued below

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4 p.

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Sherman, J.D.; Hodgkins, D.J.; Lara, P.D.; Schneider, J.D. & Stevens, R.R. Jr. May 1, 1995.

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Description

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.

Physical Description

4 p.

Notes

INIS; OSTI as DE95011989

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  • 16. Institute of Electrical and Electronic Engineers (IEEE) particle accelerator conference, Dallas, TX (United States), 1-5 May 1995

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  • Other: DE95011989
  • Report No.: LA-UR--95-1506
  • Report No.: CONF-950512--108
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 79116
  • Archival Resource Key: ark:/67531/metadc737505

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  • May 1, 1995

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 25, 2016, 8:19 p.m.

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Sherman, J.D.; Hodgkins, D.J.; Lara, P.D.; Schneider, J.D. & Stevens, R.R. Jr. Lifetime test on a high-performance dc microwave proton source, article, May 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc737505/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.