Robert A. Weller MURI Review, Nashville, June 2009 1 MURI Review, 2009 Overview: Monte Carlo Radiative Energy Deposition (MRED) Code What does MRED compute? R. A. Weller 1 , M. H. Mendenhall 1 , R. A. Reed 1 , M. A. Clemens 1 , N. A. Dodds 1 , B. D. Sierawski 1 , K. M. Warren 1 , R. D. Schrimpf 1 , L. W. Massengill 1 , T. Koi 2 , D. Wright 2 , and M. Asai 2 1 Institute for Space & Defense Electronics, Vanderbilt University 2 Stanford Linear Accelerator Laboratory, Stanford University USA Acknowledgements: – AFOSR, MURI – DTRA Basic Research Program: HDTRA1-08-1-0034 and HDTRA1-08-1-0033 – DTRA Basic Research Program: Radiation Hardened Microelectronics Program – NASA GSFC: NASA Electronic Parts and Packaging (NEPP) Program – NASA MSFC: Advanced Avionics and Processor Systems (AAPS), formerly RHESE
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Robert A. Weller MURI Review, Nashville, June 2009 1
MURI Review, 2009
Overview: Monte Carlo Radiative Energy Deposition (MRED) Code
What does MRED compute?R. A. Weller1, M. H. Mendenhall1, R. A. Reed1, M. A. Clemens1,
N. A. Dodds1, B. D. Sierawski1, K. M. Warren1, R. D. Schrimpf1, L. W. Massengill1,
T. Koi2, D. Wright2, and M. Asai21Institute for Space & Defense Electronics, Vanderbilt University
2Stanford Linear Accelerator Laboratory, Stanford UniversityUSAAcknowledgements:
– AFOSR, MURI
– DTRA Basic Research Program: HDTRA1-08-1-0034 and HDTRA1-08-1-0033– DTRA Basic Research Program: Radiation Hardened Microelectronics Program– NASA GSFC: NASA Electronic Parts and Packaging (NEPP) Program
– NASA MSFC: Advanced Avionics and Processor Systems (AAPS), formerly RHESE
Robert A. Weller MURI Review, Nashville, June 2009 2
Outline
• SEU rate prediction
–The general Monte Carlo method
–RPP method
–Collected charge methods
• Criteria for using a Monte Carlo approach
• Status of the CREME96 Revision
• Conclusion
Robert A. Weller MURI Review, Nashville, June 2009 3
Detailed physical simulation
http://www.icknowledge.com/
trends/p4(2).jpg
National Electrostatics Corporation
Radiation Environments Devices
Supercomputer
Croc image: http://crocodilian.com/crocfaq/
Algorithms Do it once; do it right. Leverage supercomputer scaling.
Robert A. Weller MURI Review, Nashville, June 2009 4
A simulated radiation event
Robert A. Weller MURI Review, Nashville, June 2009 5
• MRED: A Monte Carlo engine to determine a probability distribution by repetitive sampling.
• Monte Carlo: Appropriate when analytical computations are impractical.
• Example: “The probability density for an isotropic, mono-energetic flux of ions with atomic number z and energy E0 to deposit energy E in a specific volume?”