Analysis of proton transport experiments

Technical Report · Fri Sep 05 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/5157332· OSTI ID:5157332

Young, F. C.; Sandel, F. L.; Stephanakis, S. J.; Blauner, P. G.; Cooperstein, G.; Goldstein, S. A.; Mosher, D.

Intense 1-MeV proton beams, produced with the GAMBLE II generator at the Naval Research Laboratory, have been transported efficiently over a distance of one meter in a wall-stabilized, current carrying plasma channel. Ion beams from a pinch-reflex-diode were ballistically focused in a neutral-gas background so that a current-neutralized beam was injected into the plasma channel. Channels with diameters of 1.6 cm and 4.5 cm have been studied for gas pressures ranging from 0.1 to 1.5 Torr. Proton currents in the channels were diagnosed with absolutely calibrated prompt-gamma detectors using the /sup 19/F(p,..cap alpha gamma..)/sup 16/O reaction. Temporal measurements are compared with calculated prompt-gamma responses to provide proton energy losses, proton currents and transport efficiencies. For the small diameter channel, poor transport was observed. For the large diameter channel, efficient transport (33% to 100%) was deduced for peak proton currents of approx. 0.3 MA and for energy losses of a few hundred keV.

• Research Organization: Naval Research Lab., Washington, DC (USA)
• DOE Contract Number: AI01-77DP40042
• OSTI ID: 5157332
• Report Number(s): NRL-MR-4322
• Country of Publication: United States
• Language: English

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ION SOURCES
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