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Li-atom and C-atom beams with energies of 5 and 15 eV, respectively, have been used to measure the electron density and temperature profiles in the scrape-off layer and the plasma edge in TdeV. The beam penetrates into the plasma up to line densities of about n(e)1 = 1 x 1.0 E19/m2 and allows the instantaneous (approximately 250 microsec) measurement of n(e) and T(e) up to 1.5 x 1.0 E19/m3) and 100 eV, respectively. A camera with a Si-diode array is used to determine the spatial emissivity of the emitted light. T(e)(r) and n(e)(r) are obtained from the different attenuation and emission characteristics over the spatial range from the wall to approximately 50 mm within the separatrix.

Additional information

Authors: MICHAUD D, MPB Technologies, Dorval (CA);HADDAD E, MPB Technologies, Dorval (CA);ROSS G G, INRS Energie, Quebec (CA);MAI H H, INRS Energie, Quebec (CA);ST-GERMAIN J P, INRS Energie, Quebec (CA);POSPIESZCZYK A, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE)
Bibliographic Reference: Report: CCFM RI 382e EN (1992) 21 pp.
Availability: Available from Bericht INRS-Energie, Quebec (CA)
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