TY  - CONF
AU  - Lee, A.P.
AU  - Chou, M.C.
AU  - Hsueh, H.P.
AU  - Hwang, J.-Y.
AU  - Lau, W.K.
AU  - Wang, P.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - The High Brightness Photo-injector for THz CUR/VUV FEL at NSRRC
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A high brightness photo-injector has been build for THz coherent undulator radiation and VUV free electron laser test facility at NSRRC. In the first phase, the photo-injector was used to produce ultra-short electron bunches for THz CUR generation. The electron beam is generated form a photocathode rf gun followed by a solenoid for emittance compensation. Then A 5.2 m S-band linac accelerates the electron beam and compresses the beam by velocity bunching. Since the beam emittance will grow during the velocity bunching process, a solenoid system was installed to reduce the emmitance growth. Downstream the linac, a quadruple magnet was use for emittance measurement by quadruple scan method and the bunch length was measured by the coherent transition radiation. Finally, the ultra-short electron bunch with about few hundreds picoseconds passes through a U100 planer undulator can produce THz coherent undulator radiation. The instrument setup and results of measurement are presented in this paper.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 1125
EP  - 1127
KW  - radiation
KW  - electron
KW  - emittance
KW  - quadrupole
KW  - linac
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-MOPTS105
UR  - http://jacow.org/ipac2019/papers/mopts105.pdf
ER  - 

TY  - CONF
AU  - Lin, M.-C.
AU  - Lo, C.H.
AU  - Lu, M.-R.
AU  - Yeh, M.-K.
ED  - Boland, Mark
ED  - Tanaka, Hitoshi
ED  - Button, David
ED  - Dowd, Rohan
ED  - Schaa, Volker RW
ED  - Tan, Eugene
TI  - Multi-physics Computation and Deformation Testing of a Shell-type 1.5-GHz Cavity
J2  - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019
CY  - Melbourne, Australia
T2  - International Particle Accelerator Conference
T3  - 10
LA  - english
AB  - A copper prototype of a 1.5-GHz cavity was manufac-tured to simulate a superconducting radio-frequency cavity for technique development. Frequency tuning with longitudinal compression of this prototype and cryogenic cooling with liquid nitrogen were performed to examine the numerical results from finite-element models, mainly the corresponding shifts of the fundamental resonant frequency. An appropriate element option improved the accuracy of the resonant frequency and the distribution of the magnetic field. Effects of geometry distortion of an uneven length on the frequency shift of this shell-type cavity as loaded on longitudinal compression are also examined and discussed.
PB  - JACoW Publishing
CP  - Geneva, Switzerland
SP  - 2968
EP  - 2971
KW  - cavity
KW  - SRF
KW  - experiment
KW  - resonance
KW  - synchrotron
DA  - 2019/06
PY  - 2019
SN  - 978-3-95450-208-0
DO  - DOI: 10.18429/JACoW-IPAC2019-WEPRB065
UR  - http://jacow.org/ipac2019/papers/weprb065.pdf
ER  -