Analysis of erosion and transport of carbon impurity in the TFTR inner bumper limiter region
Conference
·
OSTI ID:10156069
Carbon sputtering and transport on the TFTR inner graphite bumper limiter is investigated with the impurity transport code REDEP. Analysis is carried out for a series of ohmic discharges in TFTR. Predictions for Z{sub eff} in the core plasma agree well with in-situ experimental measurements. Run-away self-sputtering of carbon is predicted at low densities and high edge plasma temperatures when the limiter surface was purged of deuterium. Surface erosion and deposition is analyzed. In general, redeposition reduces the peak erosion by about a factor of five. Analysis is also carried out for a typical neutral beam heated discharge with a noncircular plasma. Spatial surface erosion and deposition profiles are compared qualitatively with beta backscattering measurements of metal deposition found on the limiter.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 10156069
- Report Number(s):
- ANL/CP--76029; CONF-920311--17; ON: DE92015222
- Country of Publication:
- United States
- Language:
- English
Similar Records
Analysis of erosion and transport of carbon impurity in the TFTR inner bumper limiter region
Erosion/redeposition modeling and calculations for carbon
Transport of sputtered impurities in the vicinity of the TFTR inner bumper limiter
Conference
·
Tue Dec 31 23:00:00 EST 1991
·
OSTI ID:5067634
Erosion/redeposition modeling and calculations for carbon
Conference
·
Thu Mar 31 23:00:00 EST 1988
·
OSTI ID:5574757
Transport of sputtered impurities in the vicinity of the TFTR inner bumper limiter
Technical Report
·
Tue Jan 31 23:00:00 EST 1989
·
OSTI ID:6342860