Spectra of heliumlike krypton from tokamak fusion test reactor plasmas
- Princeton Univ., NJ (United States). Plasma Physics Lab.
- Lawrence Livermore National Lab., CA (United States)
- Lock Haven Univ., Lock Haven, PA (United States)
- Hebrew Univ., Jerusalem (Israel)
Krypton has been injected into ohmically-heated TFTR plasmas with peak electron temperatures of 6 key to study the effects of krypton on the plasma performance and to investigate the emitted krypton line radiation, which is of interest for future-generation tokamaks such as ITER, both as a diagnostic of the central ion temperature and for the control of energy release from the plasma by radiative cooling. The emitted radiation was monitored with a bolometer array, an X-ray pulse height analysis system, and a high-resolution Johann-type crystal spectrometer; and it was found to depend very sensitively on the electron temperature profile. Satellite spectra of heliumlike krypton, KrXXXV, near 0.95 {Angstrom} including lithiumlike, berylliumlike and boronlike features were recorded in second order Bragg reflection. Radiative cooling and reduced particle recycling at the plasma edge region were observed as a result of the krypton injection for all investigated discharges. The observations are in reasonable agreement with modeling calculations of the krypton ion charge state distribution including radial transport.
- Research Organization:
- Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 10144105
- Report Number(s):
- PPPL-2892; ON: DE93011976
- Resource Relation:
- Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
74 ATOMIC AND MOLECULAR PHYSICS
TFTR TOKAMAK
PLASMA DIAGNOSTICS
KRYPTON IONS
X-RAY SPECTRA
ELECTRON TEMPERATURE
JOULE HEATING
EMISSION SPECTRA
ION TEMPERATURE
BRAGG REFLECTION
ENERGY-LEVEL TRANSITIONS
700380
700320
664200
ELEMENTARY AND CLASSICAL PROCESSES IN PLASMAS
PLASMA DIAGNOSTIC TECHNIQUES AND INSTRUMENTATION
SPECTRA OF ATOMS AND MOLECULES AND THEIR INTERACTIONS WITH PHOTONS