Comparison between the radial density buildup in the TARA plugs using hydrogen versus deuterium neutral beams

Technical Report · Tue Nov 01 00:00:00 EST 1983

OSTI ID:5497508

Blackfield, D T

The WOLF code is used to compare the beam divergences from a TARA source using hydrogen and deuterium. Factors which influence the divergence which are investigated are the electron temperature, initial ion energy, electrode positions and ion beam current density. The beam divergence for 20 keV hydrogen is found to be only 20% smaller than for 25 keV deuterium for the same electrode positions. Since the optimal positioning of the electrodes is found to be independent of mesh spacing, a large parameter study is undertaken using little computer time. A time-dependent radial Fokker-Planck code is next used to examine the radial density buildup in a plug of the TARA tandem mirror. For both hydrogen and deuterium neutral beams, the influences of beam positioning, current and energy, edge neutral pressure and assumed electron temperature are studied.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Plasma Fusion Center
• DOE Contract Number: AC02-78ET51013
• OSTI ID: 5497508
• Report Number(s): DOE/ET/51013-101; PFC/RR-83-31; ON: DE84004598
• Resource Relation: Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
TARA DEVICES
PLASMA CONFINEMENT
DEUTERIUM
FOKKER-PLANCK EQUATION
HYDROGEN
NEUTRAL ATOM BEAM INJECTION
PLASMA DENSITY
BEAM INJECTION
CONFINEMENT
DIFFERENTIAL EQUATIONS
ELEMENTS
EQUATIONS
HYDROGEN ISOTOPES
ISOTOPES
LIGHT NUCLEI
MAGNETIC MIRRORS
NONMETALS
NUCLEI
ODD-ODD NUCLEI
OPEN PLASMA DEVICES
PARTIAL DIFFERENTIAL EQUATIONS
STABLE ISOTOPES
TANDEM MIRRORS
THERMONUCLEAR DEVICES
700101* - Fusion Energy- Plasma Research- Confinement
Heating
& Production