DEGAS 2 neutral transport modeling of high density, low temperature plasmas

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Neutral transport in the high density, low temperature plasma regime is examined using the DEGAS 2 Monte Carlo neutral transport code. DEGAS 2 is shown to agree with an analytic fluid neutral model valid in this regime as long as the grid cell spacing is less than twice the neutral mean-free path. Using new atomic physics data provided by the collisional radiative code CRAMD, DEGAS 2 is applied to a detached Alcator C-Mod discharge. A model plasma with electron temperature {approximately}1 eV along detached flux tubes, between the target and the ionization front, is used to demonstrate that recombination is ... continued below

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8 p.

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Stotler, D.P.; Karney, C.F.F. & Pigarov, A.Y. May 1, 1997.

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Neutral transport in the high density, low temperature plasma regime is examined using the DEGAS 2 Monte Carlo neutral transport code. DEGAS 2 is shown to agree with an analytic fluid neutral model valid in this regime as long as the grid cell spacing is less than twice the neutral mean-free path. Using new atomic physics data provided by the collisional radiative code CRAMD, DEGAS 2 is applied to a detached Alcator C-Mod discharge. A model plasma with electron temperature {approximately}1 eV along detached flux tubes, between the target and the ionization front, is used to demonstrate that recombination is essential to matching the experimental data. With the CRAMD data, {approximately}20% of the total recombination is due to molecular activated recombination.

Physical Description

8 p.

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Also available from the following url:http://www.ppl.gov. See PPPL reports section for full text.; OSTI as DE97051503

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  • Other Information: PBD: [1997]

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  • Other: DE97051503
  • Report No.: PPPL--3221
  • Grant Number: AC02-76CH03073;FG02-91ER54109
  • DOI: 10.2172/304210 | External Link
  • Office of Scientific & Technical Information Report Number: 304210
  • Archival Resource Key: ark:/67531/metadc682878

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  • May 1, 1997

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  • July 25, 2015, 2:20 a.m.

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  • April 15, 2016, 8:06 p.m.

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Stotler, D.P.; Karney, C.F.F. & Pigarov, A.Y. DEGAS 2 neutral transport modeling of high density, low temperature plasmas, report, May 1, 1997; Princeton, New Jersey. (digital.library.unt.edu/ark:/67531/metadc682878/: accessed September 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.