Control of gas input and background pressure in the end plug regions of the TMX-U thermal barrier experiment
Description
Rate equations for the plasma species in a thermal barrier end plug establish an upper bound on the neutral pressure (P) external to the plasma. For the Tandem Mirror Experiment-Upgrade (TMX-U), this bound is P less than or equal to 0.5 - 1.0 x 10-6 Torr. Initially TMX-U did not satisfy this criterion, and axial end plugging of plasma losses seemed limited by the excessive pressure. Subsequently, we modified the machine to improve the vacuum conditions, decreasing P to the desired range. At the same time axial end plugging of plasma losses increased to the duration of neutral beam injection and ECRH heating. Here we summarize our experimental measurements of gas input
Availability note (English)
MF available from INIS under the Report Number; Available from NTIS, PC A02/MF A01 as DE84002722.
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Additional details
Publishing Information
- Imprint Pagination
- 6 p.
- Report number
- UCRL--89327
Conference
- Title
- American Vacuum Society meeting.
- Dates
- 1-4 Nov 1983.
- Place
- Boston, MA (USA).
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 15019773
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- CLOSURES; ENERGY LOSSES; GAS INJECTION; PERFORMANCE; PLASMA CONFINEMENT; THERMAL BARRIERS; TMX DEVICES
- Descriptors DEC
- CONFINEMENT; FLUID INJECTION; MAGNETIC MIRRORS; OPEN PLASMA DEVICES; TANDEM MIRRORS; THERMONUCLEAR DEVICES
Optional Information
- Secondary number(s)
- CONF-831171--12.