TFTR horizontal high-resolution Bragg x-ray spectrometer
Abstract
A bent quartz crystal spectrometer of the Johann type with a spectral resolution of lambda/..delta..lambda = 10,000 to 25,000 is used on TFTR to determine central plasma parameters from the spectra of heliumlike and lithiumlike metal impurity ions (Ti, Cr, Fe, and Ni). The spectra are observed along a central radial chord and are recorded by a position sensitive multiwire proportional counter with a spatial resolution of 250. Standard delay-line time-difference readout is employed. The data are histogrammed and stored in 64k of memory providing 128 time groups of 512-channel spectra. The central ion temperature and the toroidal plasma rotation are inferred from the Doppler broadening and Doppler shift of the K lines. The central electron temperature, the distribution of ionization states, and dielectronic recombination rates are obtained from satellite-to-resonance line ratios. The performance of the spectrometer is demonstrated by measurements of the Ti XXI K radiation.
- Authors:
- Publication Date:
- Research Org.:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- OSTI Identifier:
- 6296761
- Report Number(s):
- PPPL-2173
ON: DE85004397
- DOE Contract Number:
- AC02-76CH03073
- Resource Type:
- Technical Report
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; PLASMA DIAGNOSTICS; X-RAY SPECTROMETERS; TFTR REACTORS; DOPPLER EFFECT; IMPURITIES; IONS; RESOLUTION; CHARGED PARTICLES; MEASURING INSTRUMENTS; SPECTROMETERS; THERMONUCLEAR REACTORS; TOKAMAK TYPE REACTORS; 700102* - Fusion Energy- Plasma Research- Diagnostics
Citation Formats
Hill, K W, Bitter, M, Tavernier, M, Diesso, M, von Goeler, S, Johnson, G, Johnson, L C, Sauthoff, N R, Schechtman, N, Sesnic, S, Tenney, F, and Young, K M. TFTR horizontal high-resolution Bragg x-ray spectrometer. United States: N. p., 1984.
Web. doi:10.2172/6296761.
Hill, K W, Bitter, M, Tavernier, M, Diesso, M, von Goeler, S, Johnson, G, Johnson, L C, Sauthoff, N R, Schechtman, N, Sesnic, S, Tenney, F, & Young, K M. TFTR horizontal high-resolution Bragg x-ray spectrometer. United States. https://doi.org/10.2172/6296761
Hill, K W, Bitter, M, Tavernier, M, Diesso, M, von Goeler, S, Johnson, G, Johnson, L C, Sauthoff, N R, Schechtman, N, Sesnic, S, Tenney, F, and Young, K M. 1984.
"TFTR horizontal high-resolution Bragg x-ray spectrometer". United States. https://doi.org/10.2172/6296761. https://www.osti.gov/servlets/purl/6296761.
@article{osti_6296761,
title = {TFTR horizontal high-resolution Bragg x-ray spectrometer},
author = {Hill, K W and Bitter, M and Tavernier, M and Diesso, M and von Goeler, S and Johnson, G and Johnson, L C and Sauthoff, N R and Schechtman, N and Sesnic, S and Tenney, F and Young, K M},
abstractNote = {A bent quartz crystal spectrometer of the Johann type with a spectral resolution of lambda/..delta..lambda = 10,000 to 25,000 is used on TFTR to determine central plasma parameters from the spectra of heliumlike and lithiumlike metal impurity ions (Ti, Cr, Fe, and Ni). The spectra are observed along a central radial chord and are recorded by a position sensitive multiwire proportional counter with a spatial resolution of 250. Standard delay-line time-difference readout is employed. The data are histogrammed and stored in 64k of memory providing 128 time groups of 512-channel spectra. The central ion temperature and the toroidal plasma rotation are inferred from the Doppler broadening and Doppler shift of the K lines. The central electron temperature, the distribution of ionization states, and dielectronic recombination rates are obtained from satellite-to-resonance line ratios. The performance of the spectrometer is demonstrated by measurements of the Ti XXI K radiation.},
doi = {10.2172/6296761},
url = {https://www.osti.gov/biblio/6296761},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Nov 01 00:00:00 EST 1984},
month = {Thu Nov 01 00:00:00 EST 1984}
}