TY - CPAPER
AU - Zhao, G.
AU - Chen, C.H.
AU - Chiu, Y.C.
AU - Huang, S.
AU - Huang, Y.-C.
AU - Liu, K.X.
AU - Qin, W.
AU - Zeng, L.
TI - Tunable High-power Terahertz Free-Electron Laser Amplifier
J2 - Proc. of FEL2015
AB - In the THz spectrum, radiation sources are relatively scarce. Although recent advancement on optical technologies has enabled THz radiation generation covering a broad spectral range, free-electron laser (FEL) continues to be the most importance source for generating high-power THz radiation. Here we present an ongoing collaboration between Peking University (PKU) and National Tsinghua University (NTHU) to demonstrate high peak and average powers from a THz free-electron laser amplifier driven by a superconducting accelerator system at PKU. The superconducting accelerator comprises the DC-SRF photoinjector and a linac utilizing two 1.3 GHz Tesla-type cavities. It is expected to deliver high repetition rate electron beam with the energy of 10-25 MeV and rms bunch length of about 3 ps. The driver laser of the photoinjector is a mode-locked frequency-quadrupled Nd:YVO4 laser at 266 nm. We use the remaining gun driver laser power at 1064 nm to pump a THz parametric amplifier (TPA) which designed at NTHU and generate the THz seed radiation for the FEL amplifier. The signal laser of the TPA is tunable over 2 THz, permitting generation of radiation between 0.5 and 2.5 THz to seed the FEL amplifier. With our design parameters and computer simulation in GENESIS, we expect to generate narrow-band, wavelength-tunable THz radiation with sub-MW peak power and Watt-level average power.
PB - JACoW
CY - Geneva, Switzerland
SP - 305
EP - 307
KW - FEL
KW - laser
KW - electron
KW - radiation
KW - simulation
DA - 2015/12
PY - 2015
SN - 978-3-95450-134-2
DO - 10.18429/JACoW-FEL2015-TUB05
UR - http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/tub05.pdf
ER -