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The first use of laser ablation of trace impurities into a Reversed Field Pinch is reported. It is similar to that used on tokamaks, but selects different impurity elements appropriate to the confinement times of present RFPs. Ionisation rates from helium-like carbon and boron are sufficiently slow to allow measurements of the particle confinement time from line intensity decay rates of the near UV transitions. A zero dimensional treatment, incorporating impurity ionisation and confinement, is used to interpret the temporal behaviour of the line intensity. The results obtained yield typical particle confinement times of about 1ms.

Additional information

Authors: CAROLAN P G, Culham Laboratory, Abingdon, Oxon. (GB);PATEL A, Culham Laboratory, Abingdon, Oxon. (GB);SEXTON M C, University College, Cork (IE);WALSH M J, University College, Cork (IE)
Bibliographic Reference: Report: CLM-P890 EN (1990) 12 pp.
Availability: Available from the Librarian, UKAEA, Culham Laboratory, Abingdon, Oxon. OX14 3DB (GB)
Record Number: 199011116 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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