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RIS citation export for MOPMR056: Single-shot THz Spectrometer for Measurement of RF Breakdown in mm-wave Accelerators

AU - Kutsaev, S.V.
AU - Dal Forno, M.
AU - Dolgashev, V.A.
AU - Goncharik, V.
AU - Murokh, A.Y.
AU - Ruelas, M.
AU - Savin, E.A.
AU - To, H.L.
ED - Petit-Jean-Genaz, Christine
ED - Kim, Dong Eon
ED - Kim, Kyung Sook
ED - Ko, In Soo
ED - Schaa, Volker RW
TI - Single-shot THz Spectrometer for Measurement of RF Breakdown in mm-wave Accelerators
J2 - Proc. of IPAC2016, Busan, Korea, May 8-13, 2016
C1 - Busan, Korea
T2 - International Particle Accelerator Conference
T3 - 7
LA - english
AB - We present a new instrument designed to detect RF pulse shortening caused by vacuum RF breakdown in mm-wave particle accelerators. RF breakdown limits the performance of high gradient RF accelerators. To understand the properties of these breakdowns, it is necessary to have diagnostics that reliably detect RF breakdowns. In X-band or S-band accelerators, RF breakdowns are detected by measuring RF pulse shortening, vacuum burst, or, if current monitors are available, spikes in the field-emitted currents. In mm-wave accelerators, all of these methods are difficult to use. In our experiments, we could not measure RF pulse shortening directly with a crystal detector because the RF pulse is very short'just a few nanoseconds'and changes in the measured signal were masked by RF amplitude jitter. To overcome this limitation, we built a single-shot spectrometer with a frequency range of 117-125 GHz and a resolution of 0.1 GHz. The spectrometer should be able to measure the widening of the spectrum caused by the shortening of nanosecond-long pulses. We present design considerations, first experimental results obtained at FACET, and planned future improvements for the spectrometer.
CP - Geneva, Switzerland
SP - 374
EP - 376
KW - detector
KW - vacuum
KW - radiation
KW - alignment
KW - laser
DA - 2016/06
PY - 2016
SN - 978-3-95450-147-2
DO - 10.18429/JACoW-IPAC2016-MOPMR056
UR - http://jacow.org/ipac2016/papers/mopmr056.pdf
ER -