Erosion of plasma-facing components under simulated disruption-like conditions using an electrothermal plasma gun

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Fusion Technology

OSTI ID:41450

Bourham, M A; Gilligan, J G ^[1]

---

1. North Carolina State Univ., Raleigh, NC (United States)

The NCSU electrothermal plasma gun, SIRENS, has been used to evaluate the erosion behavior of plasma-facing components under conditions simulating plasma disruption in tokamaks. The device is capable of producing conditions with heat fluence up to 10 MJ/m{sup 2} over 0.1 and 0.25 ms pulse duration. In future large tokamaks, plasma-facing components are expected to receive heat fluxes during a plasma disruption, which may exceed 100 GW/m{sup 2} over 0.01-5 ms. The vapor, which is developed at the ablating surface, absorbs a fraction of the incoming plasma energy. Candidate plasma-facing materials have been exposed to heat fluxes in the SIRENS facility (primarily from a blackbody spectrum photons), up to 100 GW/m{sup 2} over 0.1-0.25 ms. The vapor shielding effect has been demonstrated and analyzed for the divertor candidate materials.

• OSTI ID: 41450
• Report Number(s): CONF-940630--; CNN: Contract DASG60-90-C-0028; Contract DAAA22-91-M-4001; Contract DAAA22-92-C-0170; Contract AB-8360
• Journal Information: Fusion Technology, Journal Name: Fusion Technology Journal Issue: 3 Vol. 26; ISSN 0748-1896; ISSN FUSTE8
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
EROSION
HEAT FLUX
PERFORMANCE TESTING
THERMONUCLEAR REACTOR MATERIALS