Construction of a 100-Hz-repetition-rate 28-channel Thomson scattering system for the JIPPT-IIU Tokamak

An ASDEX-type Thomson scattering system (YAG Thomson) with an improved performance (100 Hz repetition rate and 1.5 cm spatial resolution) was designed and constructed for the JIPPT-IIU tokamak. Efforts were concentrated on realizing a large solid angle of collection optics (0.08 sr), high throughput...

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Veröffentlicht in:	Japanese Journal of Applied Physics 1996, Vol.35 (1A), p.266-273
Hauptverfasser:	NARIHARA, K, YAMAUCHI, K, MINAMI, T, YAMADA, I, SATO, K, KAWAHATA, K, HAMADA, Y, KOJIMA, M, HIROKURA, S
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Magnetic confinement and equilibrium Optical (ultraviolet, visible, infrared) measurements Physics Physics of gases, plasmas and electric discharges Physics of plasmas and electric discharges Plasma diagnostic techniques and instrumentation Tokamaks
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Beschreibung
Zusammenfassung:	An ASDEX-type Thomson scattering system (YAG Thomson) with an improved performance (100 Hz repetition rate and 1.5 cm spatial resolution) was designed and constructed for the JIPPT-IIU tokamak. Efforts were concentrated on realizing a large solid angle of collection optics (0.08 sr), high throughput of polychromators ( >64%) and high quantum efficiency of detectors (80% at 900 nm), which, together, yield high-quality data even with a small laser energy (0.4 J) delivered by a 100-Hz-repetition-rate Nd:YAG laser and with a short scattering length (1.0 cm). The compactness of the polychromators also contributes to achieving a high spatial resolution.
ISSN:	0021-4922 1347-4065
DOI:	10.1143/jjap.35.266