1. Heat Simulations with COMSOL
Jeff Gronberg / LLNL
June 26, 2007
This work was performed under the auspices of the U.S. Department of Energy by the University of California, Lawrence Livermore National Laboratory under Contract No. W-7405-Eng-48.

2. Time evolution of heat distribution in beryllium
Gaussian distribution, sigma=1cm
Temperature
Peak 1000 C
Default 300 C

3. Beryllium parameters COMSOL has a material model library
Parameters run with T during computation
They match standard values at T=300 K
Can be set to constants if desired

4. The relaxation timescale is in seconds
This result would argue that the conductive heat transport timescale is much longer than the bunch structure timescale

5. Next step
Attempt to replicate the ANL results for the post-target window
Due to an crash I need to get a copy of their talk
Comsol can model moving material
Simulate heat transport in the liquid metal target