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Title: Coupled EM-PIC/Radiation Transport Simulations of HERMES Courtyard Experiments

Abstract

A suite of coupled computational models for simulating the radiation, plasma, and electromagnetic (EM) environment in the High-Energy Radiation Megavolt Electron Source (HERMES) courtyard has been developed. In principle, this provides a predictive forward-simulation capability based solely on measured upstream anode and cathode current waveforms in the Magnetically Insulated Transmission Line (MITL). First, 2D R-Z ElectroMagnetic Particle-in-Cell (EM-PIC) simulations model the MITL and diode to compute a history of all electrons incident on the converter. Next, radiation transport simulations use these electrons as a source to compute the time-dependent dose rate and volumetric electron production in the courtyard. Finally, the radiation transport output is used as sources for EM-PIC simulations of the courtyard to com- pute electromagnetic responses. This suite has been applied to the November 2016 trials, shots 10268-10313. Modeling and experiment differ in significant ways. This is just the first iteration of a long process to improve the agreement, as outlined in the summary.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1481502
Report Number(s):
SAND-2018-12578
668717
DOE Contract Number:  
AC04-94AL85000; NA0003525
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English

Citation Formats

Pointon, Timothy D., Pointon, Timothy D., Cartwright, Keith, Renk, Timothy Jerome, and Yee, Benjamin Tong. Coupled EM-PIC/Radiation Transport Simulations of HERMES Courtyard Experiments. United States: N. p., 2018. Web. doi:10.2172/1481502.
Pointon, Timothy D., Pointon, Timothy D., Cartwright, Keith, Renk, Timothy Jerome, & Yee, Benjamin Tong. Coupled EM-PIC/Radiation Transport Simulations of HERMES Courtyard Experiments. United States. doi:10.2172/1481502.
Pointon, Timothy D., Pointon, Timothy D., Cartwright, Keith, Renk, Timothy Jerome, and Yee, Benjamin Tong. Thu . "Coupled EM-PIC/Radiation Transport Simulations of HERMES Courtyard Experiments". United States. doi:10.2172/1481502. https://www.osti.gov/servlets/purl/1481502.
@article{osti_1481502,
title = {Coupled EM-PIC/Radiation Transport Simulations of HERMES Courtyard Experiments},
author = {Pointon, Timothy D. and Pointon, Timothy D. and Cartwright, Keith and Renk, Timothy Jerome and Yee, Benjamin Tong},
abstractNote = {A suite of coupled computational models for simulating the radiation, plasma, and electromagnetic (EM) environment in the High-Energy Radiation Megavolt Electron Source (HERMES) courtyard has been developed. In principle, this provides a predictive forward-simulation capability based solely on measured upstream anode and cathode current waveforms in the Magnetically Insulated Transmission Line (MITL). First, 2D R-Z ElectroMagnetic Particle-in-Cell (EM-PIC) simulations model the MITL and diode to compute a history of all electrons incident on the converter. Next, radiation transport simulations use these electrons as a source to compute the time-dependent dose rate and volumetric electron production in the courtyard. Finally, the radiation transport output is used as sources for EM-PIC simulations of the courtyard to com- pute electromagnetic responses. This suite has been applied to the November 2016 trials, shots 10268-10313. Modeling and experiment differ in significant ways. This is just the first iteration of a long process to improve the agreement, as outlined in the summary.},
doi = {10.2172/1481502},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {11}
}