Bründermann, E.

Mochihashi, A.

Müller, A-S.

Steinmann, J. L.

English

KITopen

KIT – The Research University in the Helmholtz Association www.kit.eduTowards direct detection of the shape of CSR pulses  with fast THz detectorsJohannes L. Steinmann, E. Bründermann, A. Mochihashi and A.-S. MüllerJohannes Steinmann Institute for Beam Physics and TechnologyCustom Off The Shelf (COTS) equipment keeps getting better Bandwidths of ~100 GHz become commercially available 100 GHz real time 4 channel 12 bit oscilloscope 12 GHz VIS photodiode (ISR) and a THz Schottky diode (CSR)2Simple direct THz Measurements© Richard Fenner, ANL12080400Photo detector (mV)400350300250200150100500-50Time (ps)-80-60-40-200THz detector (mV)FWHM: 13 ps10-610-510-410-310-210-1100|FFT|2   of Impulse Response1101009080706050403020100Frequency (GHz) THz detector Photo detectorMeasured impulse responses FFT of impulse responsesaverage and standard deviation of 16348 shotsJohannes Steinmann Institute for Beam Physics and TechnologyShort bunch mode (~7ps zcbl) Microbunching instability Expected to see impulse response ISR stable as expected CSR shows structure Microbunching visible! Discuss with me at the poster!3Measurements© Richard Fenner, ANL-0.4-0.3-0.2-0.10.0V-100 -50 0 50 100ps-100 -50 0 50 100ps-100 -50 0 50 100Time (ps)-100 -50 0 50 100ps-100 -50 0 50 100ps-0.4-0.3-0.2-0.10.0Amplitude (V)-0.4-0.3-0.2-0.10.0V-0.4-0.3-0.2-0.10.0V-0.4-0.3-0.2-0.10.0VTurn #1 Turn #2 Turn #3 Turn #4 Turn #5Turn #6 Turn #7 Turn #8 Turn #9 Turn #10Turn #11 Turn #12 Turn #13 Turn #14 Turn #15Turn #17Turn #16 Turn #18 Turn #19 Turn #20Turn #21 Turn #22 Turn #23 Turn #24 Turn #25

Towards direct detection of the shape of CSR pulses with fast THz detectors

https://publikationen.bibliothek.kit.edu/1000151327/149414734

Towards direct detection of the shape of CSR pulses with fast THz detectors

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