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

doi:10.11578/1367554

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 »« less

Authors:

; Khrabrov, A.;

; Sommerer, T.; Keating, D.

Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Publication Date:: 2017-01-01

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.

Copy to clipboard


                    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.

Copy to clipboard


                    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

Copy to clipboard


                    
@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}

}

Copy to clipboard

Dataset:

View Dataset

DOI: 10.11578/1367554

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record: