Speaker
Nick SIMOS
(BNL)
Description
In an effort to extrapolate the interaction of intense proton pulses with materials to power levels beyond
those achieved to-date in accelerators, computational schemes based on finite element formulation are being
widely employed. While the long-term interaction between radiating particles and materials result in the degradation
of the ability of a material to absorb the induced shock, a concern addressed in parallel studies that is coupled with
shock resistance, it is the rapid heating and shock generation in a material that results from short exposure to
intense pulses that poses a serious concern and, for the power levels under consideration, is accompanied
with serious uncertainties. Experimental studies at power levels generated by currently operating accelerators
have been used to benchmark the computational processes which will be used to extrapolate the material response
to desired, but yet to be achieved power levels.
Different computational schemes that may serve different stages of the interaction problem may be utilized.
The choice of such scheme is inherently bound between accuracy and computational cost. This presentation
will discuss both the similarities as well as differences between implicit and explicit numerical formulations
applicable to the thermo-mechanical shock problem where realistic description of the problem itself requires
high-fidelity modeling or descretization and high computational cost regardless of the scheme selected.
Experience from the benchmarking of numerical schemes against experimental results will also be presented.
Primary author
Nick SIMOS
(BNL)
