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

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.
Authors:
Publication Date:
OSTI Identifier:
5728137
Report Number(s):
UCRL-53727
ON: DE86012464
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Technical Report
Resource Relation:
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
Research Org:
Lawrence Livermore National Lab., CA (USA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA HEATING; ALPHA PARTICLES; COULOMB SCATTERING; DEUTERIUM; ENERGY LOSSES; THERMONUCLEAR REACTIONS; TRITIUM; BASIC INTERACTIONS; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CHARGED PARTICLES; ELASTIC SCATTERING; ELECTROMAGNETIC INTERACTIONS; HEATING; HYDROGEN ISOTOPES; INTERACTIONS; ISOTOPES; LIGHT NUCLEI; LOSSES; NUCLEAR REACTIONS; NUCLEI; NUCLEOSYNTHESIS; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; RADIOISOTOPES; SCATTERING; STABLE ISOTOPES; SYNTHESIS; YEARS LIVING RADIOISOTOPES 700101* -- Fusion Energy-- Plasma Research-- Confinement, Heating, & Production