Thomson scattering measurements in the RFX reversed field pinch

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147762· OSTI ID:451860

Bassan, M; Bilato, R; Giudicotti, L; Pasqualotto, R; Sardella, A ^[1]

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1. Gruppo di Padova per Ricerche sulla Fusione, Associazione EURATOM ENEA CNR, Universita di Padova, Padova (Italy)

The first systematic measurements of the electron temperature (T{sub e}) spatial profile have been obtained in the reversed field pinch experiment RFX with a single pulse Thomson scattering (TS) diagnostic. Scattered light from a ruby laser pulse (E{le}15 J, {Delta}t=30 ns) is collected through three objectives from 10 positions along a diameter in the plasma equatorial plane, with a spatial resolution of 2.5 cm. Plasma discharges with current in the range 700{endash}900 kA have been investigated finding evidence of a quite flat T{sub e} profile. Data dispersion significantly greater than experimental uncertainties provides an indication of remarkable plasma fluctuations. Results are in good agreement with T{sub e} measurements from other single chord spectroscopic diagnostics (SiLi detector and SXR double filter), showing a reliable operation down to an electron density n{sub e}=3{times}10{sup 19} m{sup {minus}3}. Integration of this apparatus with a ND:YLF laser system for multipulse Thomson scattering measurements, sharing the same input optics, is under way. {copyright} {ital 1997 American Institute of Physics.}

• OSTI ID: 451860
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON TEMPERATURE
FLUCTUATIONS
NEODYMIUM LASERS
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA RADIAL PROFILES
RFX DEVICE
THOMSON SCATTERING
plasma fluctuations
plasma probes
plasma temperature
reversed field pinch