TY - JOUR
T1 - 6 MeV novel hybrid (standing wave - traveling wave) photo-cathode electron gun for a THz superradiant FEL
AU - Nause, A.
AU - Friedman, A.
AU - Weinberg, A.
AU - Borodin, D.
AU - Feigin, L.
AU - Fukasawa, A.
AU - Rosenzweig, J.
AU - Roussel, R.
AU - Spataro, B.
N1 - Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/9/11
Y1 - 2021/9/11
N2 - A novel 6 MeV hybrid photo-injector has been designed and constructed, based on a smaller-scale prototype previously built in UCLA's Particle Beam Physics Laboratory. It has been commissioned at Ariel University in Israel as an on-going collaboration between the two universities. This unique, new generation design provides a radically simpler approach to RF feeding of a gun/buncher system, leading to a much shorter beam via velocity bunching owed to an attached traveling wave section of the photo-injector. This design offers better performance in beam parameters, providing a high quality electron beam, with energy of 6 MeV. The hybrid photo-injector was designed to provide emittance of approximately 3 μm, and pulse duration of 150 fs at up to 1 nC per pulse. The hybrid gun is driven by a SLAC XK5 klystron as the high power RF source, and third harmonic of a ∼35 fs IR Laser amplifier (266 nm) to extract electrons from the photo-cathode. The unique electron gun will produce a bunched electron pulse to drive a THz FEL, which will operate at the super-radiant regime, and therefore requires ambitious beam properties. This paper describes the gun and presents experimental results from the gun and its sub-systems, including energy and charge measurements, compared with the design simulations.
AB - A novel 6 MeV hybrid photo-injector has been designed and constructed, based on a smaller-scale prototype previously built in UCLA's Particle Beam Physics Laboratory. It has been commissioned at Ariel University in Israel as an on-going collaboration between the two universities. This unique, new generation design provides a radically simpler approach to RF feeding of a gun/buncher system, leading to a much shorter beam via velocity bunching owed to an attached traveling wave section of the photo-injector. This design offers better performance in beam parameters, providing a high quality electron beam, with energy of 6 MeV. The hybrid photo-injector was designed to provide emittance of approximately 3 μm, and pulse duration of 150 fs at up to 1 nC per pulse. The hybrid gun is driven by a SLAC XK5 klystron as the high power RF source, and third harmonic of a ∼35 fs IR Laser amplifier (266 nm) to extract electrons from the photo-cathode. The unique electron gun will produce a bunched electron pulse to drive a THz FEL, which will operate at the super-radiant regime, and therefore requires ambitious beam properties. This paper describes the gun and presents experimental results from the gun and its sub-systems, including energy and charge measurements, compared with the design simulations.
KW - 150fs
KW - 1nC per pulse
KW - 6 MeV
KW - Hybrid photo-injector
KW - THz superradiant FEL
UR - http://www.scopus.com/inward/record.url?scp=85107815136&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2021.165547
DO - 10.1016/j.nima.2021.165547
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85107815136
SN - 0168-9002
VL - 1010
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 165547
ER -