Enhanced ion stopping powers in high-temperature targets
Light ions deposit their energy in target materials by interaction with bound and free electrons. As the target heats toward inertial confinement fusion temperatures a progression of ionization states will be encountered. The stopping power of each ion created in this process will depend upon details of the respective bound electron states. In general, the net ion stopping power will increase compared to cold matter due to the free electron contribution. We report an experimental and theoretical study of enhanced ion stopping powers in targets heated by 0.5--1.4 TW/cm/sup 2/ proton beams. The experiments were performed on the Proto-I accelerator with aluminum and nickel foil targets. The theoretical effort incorporated free and bound electron stopping terms in hydrocode simulations of the target response. At these intensities we observe and calculate stopping power enhancements of 100% for aluminum and 50% for nickel.
- Research Organization:
- Sandia National Laboratories, P. O. Box 5800, Albuquerque, New Mexico 87185
- OSTI ID:
- 5183991
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 58:8; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM
BARYONS
CHARGED-PARTICLE TRANSPORT
DATA
ELEMENTARY PARTICLES
ELEMENTS
EXPERIMENTAL DATA
FERMIONS
HADRONS
INFORMATION
METALS
NICKEL
NUCLEONS
NUMERICAL DATA
PROTON TRANSPORT
PROTONS
RADIATION TRANSPORT
STOPPING POWER
TRANSITION ELEMENTS