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Title: Validation and benchmarking of two particle-in-cell codes for a glow discharge

Abstract

The two particle-in-cell codes EDIPIC and LSP are benchmarked and validated for a parallel-plate glow discharge in helium, in which the axial electric field had been carefully measured, primarily to investigate and improve the fidelity of their collision models. The scattering anisotropy of electron-impact ionization, as well as the value of the secondary-electron emission yield, are not well known in this case. The experimental uncertainty for the emission yield corresponds to a factor of two variation in the cathode current. If the emission yield is tuned to make the cathode current computed by each code match the experiment, the computed electric fields are in excellent agreement with each other, and within about 10% of the experimental value. The non-monotonic variation of the width of the cathode fa ll with the applied voltage seen in the experiment is reproduced by both codes. The electron temperature in the negative glow is within experimental error bars for both codes, but the density of slow trapped electrons is underestimated. A more detailed code comparison don e for several synthetic cases of electron-beam injection into helium gas shows that the codes are in excellent agreement for ionization rate, as well as for elastic and excitationmore » collisions with isotropic scattering pattern. The remaining significant discrepancies between the two codes are due to differences in their electron binary-collision models, and for anisotropic scattering due to elastic and excitation collisions.« less

Authors:
ORCiD logo ; ; ORCiD logo ; ;
  1. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
DOE Contract Number:  
AC02-09CH11466
Product Type:
Dataset
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; validation benchmarking uncertainty quantification particle-in-cell Monte Carlo collisions glow discharge
Keywords:
validation benchmarking uncertainty quantification particle-in-cell Monte Carlo collisions glow discharge
OSTI Identifier:
1367554
DOI:
10.11578/1367554

Citation Formats

Carlsson, J., Khrabrov, A., Kaganovich, I., Sommerer, T., and Keating, D. Validation and benchmarking of two particle-in-cell codes for a glow discharge. United States: N. p., 2017. Web. doi:10.11578/1367554.
Carlsson, J., Khrabrov, A., Kaganovich, I., Sommerer, T., & Keating, D. Validation and benchmarking of two particle-in-cell codes for a glow discharge. United States. doi:10.11578/1367554.
Carlsson, J., Khrabrov, A., Kaganovich, I., Sommerer, T., and Keating, D. 2017. "Validation and benchmarking of two particle-in-cell codes for a glow discharge". United States. doi:10.11578/1367554. https://www.osti.gov/servlets/purl/1367554. Pub date:Sun Jan 01 00:00:00 EST 2017
@article{osti_1367554,
title = {Validation and benchmarking of two particle-in-cell codes for a glow discharge},
author = {Carlsson, J. and Khrabrov, A. and Kaganovich, I. and Sommerer, T. and Keating, D.},
abstractNote = {The two particle-in-cell codes EDIPIC and LSP are benchmarked and validated for a parallel-plate glow discharge in helium, in which the axial electric field had been carefully measured, primarily to investigate and improve the fidelity of their collision models. The scattering anisotropy of electron-impact ionization, as well as the value of the secondary-electron emission yield, are not well known in this case. The experimental uncertainty for the emission yield corresponds to a factor of two variation in the cathode current. If the emission yield is tuned to make the cathode current computed by each code match the experiment, the computed electric fields are in excellent agreement with each other, and within about 10% of the experimental value. The non-monotonic variation of the width of the cathode fa ll with the applied voltage seen in the experiment is reproduced by both codes. The electron temperature in the negative glow is within experimental error bars for both codes, but the density of slow trapped electrons is underestimated. A more detailed code comparison don e for several synthetic cases of electron-beam injection into helium gas shows that the codes are in excellent agreement for ionization rate, as well as for elastic and excitation collisions with isotropic scattering pattern. The remaining significant discrepancies between the two codes are due to differences in their electron binary-collision models, and for anisotropic scattering due to elastic and excitation collisions.},
doi = {10.11578/1367554},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2017},
month = {1}
}

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Works referenced in this record:

Validation and benchmarking of two particle-in-cell codes for a glow discharge
journal, November 2016

  • Carlsson, Johan; Khrabrov, Alexander; Kaganovich, Igor
  • Plasma Sources Science and Technology, Vol. 26, Issue 1
  • DOI: 10.1088/0963-0252/26/1/014003

    Works referencing / citing this record:

    Validation and benchmarking of two particle-in-cell codes for a glow discharge
    journal, November 2016

    • Carlsson, Johan; Khrabrov, Alexander; Kaganovich, Igor
    • Plasma Sources Science and Technology, Vol. 26, Issue 1
    • DOI: 10.1088/0963-0252/26/1/014003