Diagnostics for local spectroscopic measurements in the divertor region of the Alcator C-Mod and DIII-D tokamaks
- Plasma Spectroscopy Group, Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, Maryland 21218 (United States)
- Plasma Fusion Center, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
- General Atomics, San Diego, California 92186 (United States)
Local measurements of line emission of either intrinsic or gas puffed impurities will be performed around and below the X point. Such spectroscopic measurements, together with divertor Thomson scattering and bolometric imaging will enable estimates of divertor impurity particle distributions and power losses. A proposed multilayer mirror (MLM) diagnostic mounted inside the tokamak vessel will measure XUV (100{endash}200 {Angstrom}) emission from impurities at multiple locations in the divertor region of the C-Mod tokamak. A prototype of this instrument measuring NV at 162.6 {Angstrom} is scheduled to be installed on C-Mod with a single chordal view of the X point. A multichordal/multispectral device using MLMs and gratings has been designed for the DIII-D tokamak. The instrument will measure the resonance emission of CII to CVI from 40{endash}2000 {Angstrom}, thus enabling a more direct and reliable estimate of the impurity content in the divertor. At DIII-D, the device will be mounted on a port below the mid plane avoiding spectroscopic contamination from the core plasma. {copyright} {ital 1997 American Institute of Physics.}
- Research Organization:
- Massachusetts Institute of Technology
- DOE Contract Number:
- AC02-78ET51013; FG02-86ER53214
- OSTI ID:
- 451950
- Report Number(s):
- CONF-960543--
- Journal Information:
- Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN RSINAK; ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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