Effects of beam temperature on ion heating for high energy density physics experiments
Author: Peter H Stoltz
Requested Type: Poster Only
Submitted: 2006-12-18 17:11:26
Co-authors: J. Barnard, S. Veitzer
Contact Info:
Tech-X Corporation
5621 Arapahoe Ave
Boulder, CO 80303
United States
Abstract Text:
The dynamics of ions moving in thin foils and underdense foams will play a key role in the design of future warm dense matter experiments. Using the SRIM code, we estimate that for initially mono-energetic 2.8 MeV Li ions hitting a solid density Al foil, the induced energy spread due to stochastic effects is 10% at a depth of 3.4 microns. In contrast, for 400 keV K ions hitting an Al foam of 10% soliddensity, stochastic effects induce a nearly 100% energy spread. At these beam energies, the nuclear stopping effects are negligible for the Li beam, but not for the K beam. We estimate this stochastic energy spread leads to almost no change in uniformity of temperature for the target heated by the Li beam, but leads to a factor of two of non-uniformity in temperature of the target for the K beam over a depth of 3.4 microns. One application of these new results for temperature profiles with realistic beam energy distributions is as input to hydrodynamic simulations of the evolution of the target.
Characterization: B5
Comments:
