Studies of TTF RF Photocathode Gun Using Acoustic Sensors
The arc that occurs during RF breakdown is known to cause local heating of a copper cavity surface, with temperatures sometimes exceeding the melting point. Thermally generated acoustic shock waves [1,2] that accompany breakdowns can be easily detected on the surface of the cavity using externally mounted sensors. Acoustic emission sensors [3] have been used at the TESLA Test Facility to find RF high voltage breakdown locations in the photocathode gun system. It is not known if the acoustic signal emitted from the source (cathode) of the arc is stronger than that emitted from its terminus. The start time and root mean square amplitude of the signal from each of several sensors can be used to locate and classify the breakdown event. We report here on the use of eight sensors mounted on the TTF RF gun [4] to locate its breakdown events during operation with a pulse length of 300{micro}s and a pulse amplitude up to 35 MeV/m.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE Office of Energy Research (ER) (US)
- DOE Contract Number:
- AC03-76SF00515
- OSTI ID:
- 799984
- Report Number(s):
- SLAC-PUB-9340; TRN: US200308%%370
- Resource Relation:
- Other Information: PBD: 9 Aug 2002
- Country of Publication:
- United States
- Language:
- English
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