Calibration of direct nuclear activation diagnostics for measuring proton, lithium, and fluorine intense ion beams

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:182771

Ruiz, C L ^[1]; Cooper, G W; Chambers, G; Schmidlapp, F A

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1. Sandia National Labs., Albuquerque, NM (United States)

In the light-ion-beam fusion program at Sandia National Laboratories an intense lithium beam is being developed to drive inertial confinement fusion targets. An important parameter of this lithium beam is its purity. Unfortunately, residual hydrocarbons in the Particle Beam Fusion Accelerator II (PBFA II) may contaminate the beam with hydrogen, carbon and oxygen. Also, when LiF anode sources are used, the beam may be contaminated with fluorine. To measure the amount of protons, lithium, and fluorine ions in the beam, the authors have developed direct nuclear activation diagnostics that are uniquely sensitive to these three ions. In particular, the diagnostics are based on the thick target yields of the ions interacting with LiF, BN, and Ti target materials. To calibrate these diagnostics they have measured the thick target yields of protons, lithium, and fluorine on each of these materials as a function of bombarding particle energy using a Van de Graaff accelerator. They have also irradiated these materials with carbon ions and determined that there are no significant interfering reactions. The calibration data are presented and the necessity of using ``pepper shaker`` geometry for fielding these diagnostics on PBFA II are discussed.

• Research Organization: Sandia National Laboratory
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 182771
• Report Number(s): CONF-950612--; ISBN 0-7803-2669-5
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIAGNOSTIC TECHNIQUES
IMPURITIES
ION BEAMS
ION SOURCES
IONIC COMPOSITION
LITHIUM IONS
PARTICLE BEAM FUSION ACCELERATOR
PERFORMANCE
VACUUM SYSTEMS