FOMA-a fast optical multichannel analyzer

Author

Haskovec, J.S. ; Bramson, G. ; Brooks, N.H. ; Perry, M.

Author_Institution

Gen. Atom., San Diego, CA, USA

fYear

1989

fDate

2-6 Oct 1989

Firstpage

153

Abstract

A fast optical multichannel analyzer (FOMA) was built for obtaining spectroscopic measurements with fast time resolution on the DIII-D tokamak. The FOMA utilizes a linear photodiode array (RETICON RL 1024 SA) as the detector sensor. An external recharge switch and ultrafast operational amplifiers permit a readout time per pixel of 300 ns. In conjunction with a standard CAMAC digitizer and timing modules, a readout time of 500 μs is achieved for the full 1024-element array. Data acquired in bench tests and in actual spectroscopic measurements on the DIII-D tokamak are presented to illustrate the camera´s capability. The system and the data-acquisition software used are described in detail

Keywords

CAMAC; computerised spectroscopy; data acquisition; fusion reactor instrumentation; nuclear electronics; photodiodes; plasma diagnostics; pulse height analysers; 1024-element array; DIII-D tokamak; FOMA; RETICON RL 1024 SA; bench tests; data-acquisition software; detector sensor; external recharge switch; fast optical multichannel analyzer; fast time resolution; linear photodiode array; readout time; spectroscopic measurements; standard CAMAC digitizer; timing modules; ultrafast operational amplifiers; Detectors; Optical sensors; Optical switches; Photodiodes; Sensor arrays; Spectroscopy; Stimulated emission; Time measurement; Tokamaks; Ultrafast optics;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on

Conference_Location

Knoxville, TN

Type

conf

DOI

10.1109/FUSION.1989.102194

Filename

102194