Study of the impact of resonant magnetic perturbation fields on gross tungsten erosion using DiMES samples in DIII-D
[1];
[1];
[2];
[3];
[3];
- Univ. of Wisconsin, Madison, WI (United States)
- General Atomics, San Diego, CA (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Univ. of California, San Diego, CA (United States)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Oak Ridge Associated Univ., Oak Ridge, TN (United States)
An experiment was conducted in DIII-D to compare gross tungsten (W) erosion on samples exposed to outer strike point (OSP) sweeps in L-mode plasmas for three conditions. These included two phases of resonant magnetic perturbations (RMPs), and a set with no perturbations. Upon RMP application, lobe structures indicative of strike point splitting of the OSP were evident in divertor camera data and on Langmuir probes. Gross W erosion flux, GW, inferred spectroscopically using the S/XB method applied to the 400.9 nm W-I line, was generally in the range Gamma(W)/Gamma(D+),(perpendicular to) = 2 x 10(-4) referenced to incident deuterium ion flux Gamma(D+),(perpendicular to) and was increased in the RMP cases by no more than 30% of the level observed in unperturbed discharges. A large reduction in gross erosion (50%) was observed in the private flux region at the W sample for one specific toroidal phase of the RMP field.
- Research Organization:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories, San Diego, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES)
- Grant/Contract Number:
- AC04-94AL85000; AC05-00OR22725
- OSTI ID:
- 1477318
- Alternate ID(s):
- OSTI ID: 1531250
- Report Number(s):
- SAND-2018-10785J; 668321
- Journal Information:
- Physica Scripta, Vol. T170; ISSN 0031-8949
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Similar Records
Predicting tungsten erosion and leakage properties for the new V-shaped small angle slot divertor in DIII-D
The effectiveness of D 2 pellet injection in reducing intra-ELM and inter-ELM tungsten divertor erosion rates in DIII-D during the Metal Rings Campaign