Design and test of-80 kV snubber core assemblies for MFTF sustaining-neutral-beam power supplies

Conference · Fri Oct 09 00:00:00 EDT 1981

OSTI ID:5789367

Bishop, S R; Mayhall, D J; Wilson, J H; De Vore, K R; Ross, R I; Sears, R G

Core snubbers, located near the neutral beam source ends of the Mirror Fusion Test Facility (MFTF) Sustaining Neutral Beam Power Supply System (SNBPSS) source cables, protect the neutral beam source extractor grid wires from overheating and sputtering during internal sparkdowns. The snubbers work by producing an induced counter-emf which limits the fault current and by absorbing the capacitive energy stored on the 80 kV source cables and power supplies. A computer program STACAL was used in snubber magnetic design to choose appropriate tape wound cores to provide 400 ..cap omega.. resistance and 25 J energy absorption. The cores are mounted horizontally in a dielectric structure. The central source cable bundle passes through the snubber and terminates on three copper buses. Multilam receptacles on the buses connect to the source module jumper cables. Corona rings and shields limit electric field stresses to allow close clearances between snubbers. A filament circuit shunt bias winding wound on a dielectric cylinder surrounds the cores. The dc voltage holdoff of a single snubber has been tested. Current and voltage behavior during capacitor bank and source cable discharges are presented.

• Research Organization: Lawrence Livermore National Lab., CA (USA); EG and G, Inc., San Ramon, CA (USA). Energy Measurements Group
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5789367
• Report Number(s): UCRL-86061; CONF-811040-51; ON: DE82002053; TRN: 82-001469
• Resource Relation: Conference: 9. symposium on engineering problems of fusion research, Chicago, IL, USA, 26 Oct 1981
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
NEUTRAL BEAM SOURCES
POWER SUPPLIES
DESIGN
ELECTRONIC EQUIPMENT
MFTF DEVICES
PERFORMANCE TESTING
EQUIPMENT
MAGNETIC MIRRORS
OPEN PLASMA DEVICES
TESTING
THERMONUCLEAR DEVICES
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