Alpha particle density and energy distributions in tandem mirrors using Monte-Carlo techniques

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We have simulated the alpha thermalization process using a Monte-Carlo technique, in which the alpha guiding center is followed between simulated collisions and Spitzer's collision model is used for the alpha-plasma interaction. Monte-Carlo techniques are used to determine the alpha radial birth position, the alpha particle position at a collision, and the angle scatter and dispersion at a collision. The plasma is modeled as a hot reacting core, surrounded by a cold halo plasma (T approx.50 eV). Alpha orbits that intersect the halo lose 90% of their energy to the halo electrons because of the halo drag, which is ten ... continued below

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Pages: 218

Creation Information

Kerns, J.A. May 1, 1986.

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Description

We have simulated the alpha thermalization process using a Monte-Carlo technique, in which the alpha guiding center is followed between simulated collisions and Spitzer's collision model is used for the alpha-plasma interaction. Monte-Carlo techniques are used to determine the alpha radial birth position, the alpha particle position at a collision, and the angle scatter and dispersion at a collision. The plasma is modeled as a hot reacting core, surrounded by a cold halo plasma (T approx.50 eV). Alpha orbits that intersect the halo lose 90% of their energy to the halo electrons because of the halo drag, which is ten times greater than the drag in the core. The uneven drag across the alpha orbit also produces an outward, radial, guiding center drift. This drag drift is dependent on the plasma density and temperature radial profiles. We have modeled these profiles and have specifically studied a single-scale-length model, in which the density scale length (r/sub pD/) equals the temperature scale length (r/sub pT/), and a two-scale-length model, in which r/sub pD//r/sub pT/ = 1.1.

Physical Description

Pages: 218

Notes

NTIS, PC A10/MF A01; 1.

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  • Other Information: Portions of this document are illegible in microfiche products. Original copy available until stock is exhausted. Thesis. Submitted to Rensselaer Polytechnic Institute, Troy, NY

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  • Other: DE86012464
  • Report No.: UCRL-53727
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/5728137 | External Link
  • Office of Scientific & Technical Information Report Number: 5728137
  • Archival Resource Key: ark:/67531/metadc1093733

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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Creation Date

  • May 1, 1986

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 26, 2018, 1:28 p.m.

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Kerns, J.A. Alpha particle density and energy distributions in tandem mirrors using Monte-Carlo techniques, report, May 1, 1986; [Livermore,] California. (digital.library.unt.edu/ark:/67531/metadc1093733/: accessed June 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.