๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Hot Spot Formation on different Tokamak Wall Materials

โœ Scribed by A. V. Nedospasov; I. V. Bezlyudny

Publisher
John Wiley and Sons
Year
1998
Tongue
English
Weight
278 KB
Volume
38
Category
Article
ISSN
0005-8025

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โœฆ Synopsis

The thermal contraction phenomenon and generation of 'hot spots' due to thennoemission were described in (1-31. The peper consider non-linear stages of heat contraction on the graphite, beryllium, tungsten and vanadium wall. It is shown that on the beryllium surface hot spot can't appear due to strong cooling by sublimation. For other materials the conditions of hot spot appearance due to local superheating of the wiill have been calculated and their perameters were found: critical surface tcmperiitim, size of spots und their trmperuturc profiles. heat fluxes from pliesma to the spots. It have been calculated fluxes of sublimritiny materials from spots to the plasma. It is noticed that nominal temperature of the d i r e divertor plate, accepted in ITER's project to being equal 1500ยฐC, is lower then critical tempaaturc of the development heat contraction due to thermoemission.

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