Community Research and Development Information Service - CORDIS

Abstract

The LIDAR Thomson scattering diagnostic on the JET tokamak makes routine measurements of the plasma electron temperature and density profiles. During JET operations the windows used for scattered light collection gradually become coated with deposits due to the plasma erosion of the wall. The consequent loss in transmission can affect the electron density and also the electron temperature measurement. This paper describes both the method adopted to monitor the change in transmission due to the gradual build up of the deposits and the application of laser window cleaning to counteract it.

Additional information

Authors: BROWN B W, JET Joint Undertaking, Abingdon, Oxon. (GB);GOWERS C W, JET Joint Undertaking, Abingdon, Oxon. (GB);NIELSEN P, JET Joint Undertaking, Abingdon, Oxon. (GB);SCHUNKE B, JET Joint Undertaking, Abingdon, Oxon. (GB)
Bibliographic Reference: Report: JET-P(94)21 EN (1994) 4 pp.
Availability: Available from the Publications Officer, JET Joint Undertaking, Abingdon, Oxon. OX14 3EA (GB)
Record Number: 199410762 / Last updated on: 1994-11-28
Category: PUBLICATION
Original language: en
Available languages: en