HIGH-/cap beta/ INJECTION INTO A MAGNETIC MIRROR FIELD
Axial lnjection of a high-density helium plasma into a magnetic mirror is experimentally studied. Observations of the plasma-field interaction are made with magnetic probes, electrostatic probes, piezoelectric probes, and an optical monochromator that analyzes emission-line profiles. In the central plane of the mirror a density of (2 plus or minus 1) x 10/sup 15/ ions/cm/sup 3/ and a maximum ion temperature of l0 ev are indicated. In the upstream region ion temperatures of 35 plus or minus 5 ev are recorded. Diagmagnetic signals show that the high- beta plasma stagmates'' near the upstream throat of the mirror. Also, the derived plasma pressure measured on axis decreases exponentially downstream. Plezoelectric-probe measurements show large axialmomentum transfer rates in the downstream region of the mirror, where no diamagnetic signals are observed. The data are compared with a fluid model of a plasma that describes the injection, stagnation,'' and effusion along field lines. This experiment indicates that the axial injection of a collision-dominated, high- beta plasma into a static mirror fleld is not efficient for producing and confining a high- temperature plasma. (auth)
- Research Organization:
- General Atomic Div., General Dynamics Corp., San Diego, Calif.
- NSA Number:
- NSA-16-008274
- OSTI ID:
- 4817742
- Report Number(s):
- GA-2375; 0031-9171
- Journal Information:
- Physics of Fluids (U.S.), Vol. Vol: 4; Other Information: GA-2375. Orig. Receipt Date: 31-DEC-62
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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