Characteristics of a freely programmable ICCD detector for multichord particle influx measurements on the ASDEX-Upgrade tokamak
A description is given of the characteristics of a compact space and wavelength-resolving spectrometer-detector arrangement, which is used to measure spectral line shapes simultaneously along several viewing chords. The system is based upon a freely programmable slow-scan charge-coupled device (CCD) camera gated by an image intensifier tube. Visible and near-UV light emitted near the plasma boundary is collected from up to 12 viewing chords and transmitted to the spectrograph by quartz fibres. Spectra can be recorded with a temporal resolution of 20 ms by means of multiple pixel binning during CCD readout. Integration of the spectral line profiles yields particle fluxes of various low-Z species for ohmically heated helium discharges. The calibration, sensitivity, and signal-to-noise ratio of the system are reconstructed considering each individual element, allowing an easy prediction of the performance of similar applications.
Bibliographic Reference: Article: Review of Scientific Instruments, Vol. 64 (1993) No. 5, pp. 1257-1262
Record Number: 199310959 / Last updated on: 1994-11-29
Original language: en
Available languages: en