Grazing incidence VUV duochromator with metallic multi-anode microchannel plate detectors for tokamak plasma spectroscopy
The performance of a grazing incidence (85 ) duochromator using two proximity focused metallic multi-anode microchannel plate detectors is described. The system, using standard photon counting techniques directly on the array of 10 straight anodes, has a total coverage of 5-230 nm, with a 0.13 nm (one anode) spectral resolution; each detector (centred on the Rowland circle and mounted perpendicularly to the diffracted ray) covers a 1.33 nm region, the spectral range being independent of the central wavelength value. A maximum permissible counting rate of 2 x 1.0 E6 Hz has been obtained, thus allowing sub-ms time resolution. Examples of the operation of this system on the Tore Supra tokamak are described.
Bibliographic Reference: Report: EUR-CEA-FC-1459 EN (1992) 16 pp.
Availability: Available from CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Record Number: 199211213 / Last updated on: 1994-11-29
Original language: en
Available languages: en