Reconstruction of Detached Divertor Plasma Conditions in DIII-D Using Spectroscopic and Probe Data

Stangeby, P ; Fenstermacher, M

Lawrence Livermore National Laboratory

关键词: 70 Plasma Physics And Fusion Technology;    Doublet-3 Device;    Simulation;    Thomson Scattering;    Divertors;   

DOI  :  10.2172/15011804
RP-ID  :  UCRL-TR-208423
RP-ID  :  W-7405-ENG-48
RP-ID  :  15011804

美国|英语

来源: UNT Digital Library

【 摘 要 】

For some divertor aspects, such as detached plasmas or the private flux zone, it is not clear that the controlling physics has been fully identified. This is a particular concern when the details of the plasma are likely to be important in modeling the problem--for example, modeling co-deposition in detached inner divertors. An empirical method of ''reconstructing'' the plasma based on direct experimental measurements may be useful in such situations. It is shown that a detached plasma in the outer divertor leg of DIII-D can be reconstructed reasonably well using spectroscopic and probe data as input to a simple onion-skin model and the Monte Carlo hydrogenic code, EIRENE. The calculated 2D distributions of n{sub e} and T{sub e} in the detached divertor were compared with direct measurements from the divertor Thomson scattering system, a diagnostic capability unique to DIII-D.