PBFA II lithium beam characterization from inner-shell x-ray images
- Sandia National Laboratories, P.O. Box 5800, Albuquerque, New Mexico 87185 (United States)
The Particle Beam Fusion Accelerator (PBFA II) is now driving targets with ICF-relevant lithium ion beams. During the most recent lithium beam target series, time-integrated x-ray pinhole cameras viewed the ion-induced inner-shell x-ray fluorescence from the central gold cone target and a titanium-coated strip. Ion-beam profiles at a nominal 10-mm radius and fixed azimuthal direction were obtained from images of the Ti [ital K][sub [alpha]] fluorescence of a Ti-coated Al diagnostic wire. The gold cone gave us beam profiles at a nominal 3-mm radius and at all azimuthal angles from the Au [ital L][sub [alpha]] fluorescence. From these profiles, we obtained the ion-beam vertical focus position, the full width at half maximum, and the degree of azimuthal uniformity for the lithium target shots. For these initial results, beam steering problems were evident. Azimuthal uniformity was measured from the ion-beam footprint on the outer Au case (predominantly Au [ital L][sub [alpha]]) of the hohlraum target and was found to be in the same range (up to 30%) as for previous proton beam target series.
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 6698691
- Journal Information:
- Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 66:1; ISSN 0034-6748; ISSN RSINAK
- Country of Publication:
- United States
- Language:
- English
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Measurement of beam properties and reproducibility on recent PBFA II target shots
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Related Subjects
700411* -- Inertial Confinement Devices-- (1992-)
ACCELERATORS
BEAM PROFILES
CHARGED PARTICLES
COLLOIDS
CONFINEMENT
DISPERSIONS
ELEMENTS
ENERGY DEPOSITION
EQUIPMENT
FLUORESCENCE
FOAMS
GOLD
IMAGES
INERTIAL CONFINEMENT
ION BEAM TARGETS
IONS
LITHIUM IONS
LUMINESCENCE
METALS
PARTICLE BEAM FUSION ACCELERATOR
PLASMA CONFINEMENT
PLASMA DIAGNOSTICS
TARGETS
TRANSITION ELEMENTS
X-RAY EQUIPMENT