Spectra of heliumlike krypton from tokamak fusion test reactor plasmas

Technical Report · Thu Apr 01 00:00:00 EST 1993

DOI:https://doi.org/10.2172/6601705· OSTI ID:6601705

Bitter, M; Hsuan, H; Bush, C; Cohen, S; Cummings, C J; Grek, B; Hill, K W; Schivell, J; Zarnstorff, M ^[1]; Beiersdorfer, P; Osterheld, A ^[2]; Smith, A ^[3]; Fraenkel, B ^[4]

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1. Princeton Univ., NJ (United States). Plasma Physics Lab.
2. Lawrence Livermore National Lab., CA (United States)
3. Lock Haven Univ., Lock Haven, PA (United States)
4. 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; USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 6601705
• Report Number(s): PPPL-2892; ON: DE93011976
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
74 ATOMIC AND MOLECULAR PHYSICS
KRYPTON IONS
X-RAY SPECTRA
TFTR TOKAMAK
PLASMA DIAGNOSTICS
BRAGG REFLECTION
ELECTRON TEMPERATURE
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
ION TEMPERATURE
JOULE HEATING
CHARGED PARTICLES
CLOSED PLASMA DEVICES
ELECTRIC HEATING
HEATING
IONS
PLASMA HEATING
REFLECTION
RESISTANCE HEATING
SPECTRA
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700380* - Elementary & Classical Processes in Plasmas- (1992-)
700320 - Plasma Diagnostic Techniques & Instrumentation- (1992-)
664200 - Spectra of Atoms & Molecules & their Interactions with Photons- (1992-)