Speaker
Description
A compact THz facility, based on Free Electron Laser (FEL) system has been commissioned at Inter University Accelerator Centre (IUAC), New Delhi. The design of the facility is based on pre-bunched FEL where a train of electron micro-bunches having maximum energy of 8 MeV are being injected into a short undulator to produce the THz radiation in the range of 0.18 - 3.0 THz. The electron micro bunches are produced from the photocathode by striking with the ultra-short laser pulses generated from an advanced Fibre laser system. The frequency of THz can be tuned by varying the separation of the laser micro-pulses which produce the electron micro-bunches with variable separation. The electron micro-bunches are being injected in to the undulator to produce the THz radiation and the electron beam along with the THz radiation are co-propagating through the undulator. At the exit of the undulator, a thin Titanium foil is kept through which the electron beam passes through and the THz radiation gets reflected, subsequently detected by the Schottky Barrier Diode detector. The commissioning details and the initial operation of the of the various sub-systems of the compact FEL-THz facility e.g. high-power RF systems, electron gun, fibre laser system, state of the art photocathode deposition system, undulator, various beam transport and beam diagnostic systems, etc. will be presented in this paper.
Funding Agency
Jointly funded by BRNS and IUAC
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