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Graphite test-limiters have been used as single main limiters in TEXTOR and exposed to convective heat loads of typically 10-20 MW/m2. Local carbon release has been studied by means of local spectroscopy of CI- and CII-emission lines. Surface temperature distributions were determined by CCD camera measurements in the IR spectral region. It was found that the increase of the local carbon flux was below 15 % when the surface temperature increased locally up to about 1900 C, demonstrating that radiation enhanced carbon emission (RES) is negligible under these conditions. The suppression of RES-emission is discussed in relation to the present RES models.

Additional information

Authors: PHILIPPS V, Forschungszentrum Jülich GmbH (KFA) (DE);POSPIESZCZYK A, Forschungszentrum Jülich GmbH (KFA) (DE);SCHWEER B, Forschungszentrum Jülich GmbH (KFA) (DE);UNTERBERG B, Forschungszentrum Jülich GmbH (KFA) (DE);VIETZKE E, Forschungszentrum Jülich GmbH (KFA) (DE);TRINKAUS H, Forschungszentrum Jülich GmbH (KFA) (DE)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vols. 220-222 (1995) pp. 467-471
Record Number: 199510906 / Last updated on: 1995-08-10
Original language: en
Available languages: en