An ELM-resilient rf arc detection system for DIII-D based on electromagnetic and sound emissions from the arc

Conference · Tue Apr 01 00:00:00 EST 1997

OSTI ID:491611

Phelps, D A

Two detection methods based solely on sound and electromagnetic emissions form the arc are presented. Detection of arc induced sound signals 40 to 50 dB above background noise are observed. Detection of arc induced low radio frequency (HF) electromagnetic noise levels 20 to 60 dB above background are observed. The arc noise is randomly strongest on side A and/or B of the DIII-D rf system. The sum of these sensors correlates with tripping due to an increase in the rf reflection coefficient. The sensors are resilient to ELMs and other plasma noise.

• Research Organization: General Atomics, San Diego, CA (United States)
• Sponsoring Organization: USDOE Office of Energy Research, Washington, DC (United States)
• DOE Contract Number: AC03-89ER51114
• OSTI ID: 491611
• Report Number(s): GA-A22577; CONF-9704102-13; ON: DE97006509; TRN: 97:012587
• Resource Relation: Conference: 12. topical conference on radio frequency power in plasmas, Savannah, GA (United States), 1-3 Apr 1997; Other Information: PBD: Apr 1997
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION
RF SYSTEMS
EQUIPMENT PROTECTION DEVICES
DOUBLET-3 DEVICE
ICR HEATING
DIAGNOSTIC TECHNIQUES
ELECTRIC ARCS
ANTENNAS
MEASURING METHODS