A Seemingly Simple Task: Filling a Solenoid Volume in Vacuum with Dense Plasma

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Space-charge neutralization of a pulsed, high-current ion beam is required to compress and focus the beam on a target for warm dense matter physics or heavy ion fusion experiments. We described attempts to produce dense plasma in and near the final focusing solenoid through which the ion beam travels, thereby providing an opportunity for the beam to acquire the necessary charge-compensating electrons. Among the options are plasma injection from four pulsed vacuum arc sources located outside the solenoid, and using a high current (> 4 kA) pulsed vacuum arc plasma from a ring cathode near the edge of the solenoid. ... continued below

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Anders, Andre; Kauffeldt, Marina; Roy, Prabir & Oks, Efim June 24, 2010.

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Space-charge neutralization of a pulsed, high-current ion beam is required to compress and focus the beam on a target for warm dense matter physics or heavy ion fusion experiments. We described attempts to produce dense plasma in and near the final focusing solenoid through which the ion beam travels, thereby providing an opportunity for the beam to acquire the necessary charge-compensating electrons. Among the options are plasma injection from four pulsed vacuum arc sources located outside the solenoid, and using a high current (> 4 kA) pulsed vacuum arc plasma from a ring cathode near the edge of the solenoid. The plasma distribution is characterized by photographic means and by an array of movable Langmuir probes. The plasma is produced at several cathode spots distributed azimuthally on the ring cathode. Beam neutralization and compression are accomplished, though issues of density, uniformity, and pulse-to-pulse reproducibly remain to be solved.

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  • 24th International Symposium on Discharges and Electrical Insulation in Vacuum(ISDEIV), Braunschweig, Germany, August 30-September 3, 2010

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  • Report No.: LBNL-3580E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 986873
  • Archival Resource Key: ark:/67531/metadc1015432

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  • June 24, 2010

Added to The UNT Digital Library

  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 7, 2017, 7:16 p.m.

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Anders, Andre; Kauffeldt, Marina; Roy, Prabir & Oks, Efim. A Seemingly Simple Task: Filling a Solenoid Volume in Vacuum with Dense Plasma, article, June 24, 2010; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc1015432/: accessed December 13, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.