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Abstract

In JET three pinhole type bolometer cameras observe one poloidal cross-section of the plasma from three different viewing positions. A simple projection method is used to test the consistency of the assumed shape of isoemissivity surface with the integral measurements. If consistency is found a generalized Abel inversion can be performed. In a considerable number of discharges the surfaces of constant emissivity do not coincide with the magnetic flux surfaces. Besides the obvious asymmetry due to limiter and R.F. antenna, a strong (<= 30%) up/down asymmetry and MARFEs are presented as examples. A neoclassical explanation for the up/down asymmetry is proposed.

Additional information

Authors: GOTTARDI N, JET JOINT UNDERTAKING, ABINGDON (UK);KRAUSE H, JET JOINT UNDERTAKING, ABINGDON (UK);MAST K F JET JOINT UNDERTAKING, ABINGDON (UK), JET JOINT UNDERTAKING, ABINGDON (UK)
Bibliographic Reference: 12TH EUROPEAN CONFERENCE ON CONTROLLED FUSION AND PLASMA PHYSICS, BUDAPEST (HUNGARY), SEPT. 2-6, 1985 PP. 33-36 WRITE TO THE PUBLICATIONS OFFICER, JET JOINT UNDERTAKING, ABINGDON, OXON, OX14 3EA (UK), MENTIONING REPORT JET-P(85)10, 1985
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