Considered design and radiation calculation for a compact THz coherent radiation source

Abstract

Since the light obtained from the Siam Photon Source (SPS) in Thailand is the high-intensity radiation in only the region of the infrared (IR) to high-energy X-rays, it has great attention in many areas of scientific research and industrial development. In order to increase in the number of users and applications, the terahertz (THz) region covering the frequency range from 0.1 to 10 THz needs to be fulfilled. Therefore, a compact accelerator based free-electron laser or coherent radiation is particularly interesting for providing an intense THz radiation. A 1.6-cell photocathode RF gun is used as an electron source to generate a high-brightness electron beam. The energy of electron beam can be raised up to meet the target of 30 MeV in a linear accelerator (Linac) before moving to a chicane bunch compressor. The THz radiation is produced when a short bunch electron beam propagates through an undulator. In order to achieve the intense narrow-band THz coherent radiation at tunable frequencies between 0.5 THz and 5.0 THz with MW peak power, a THz radiation source needs to be studied and developed. Design of high-power THz radiation source is described in this paper.

Design and Beam Dynamic Studies of an Injector for a Compact THz Coherent Radiation Source

“…To support the increasing demand for agriculture, food, and materials industries in Thailand, SLRI is developing a THz radiation source capable of generating intense THz radiation, as proposed in [1]. Figure 1 shows the layout design of the THz source, which has the potential to generate intense, narrow-band, and tunable THz coherent radiation in the frequency range of 0.5 to 5.0 THz.…”

“…Therefore, a photocathode RF gun will be used as the electron source, and the emitted electron beam will be accelerated to 30 MeV energy by a high-gradient linac [2]. To generate the intense THz coherent radiation, the goal of electron bunch length must be compressed to 100 fs by a chicane bunch compressor before passing through an undulator [1]. The primary objective of this study is to focus on the design and beam dynamic analyses of an injector for a compact THz coherent radiation source, enabling a broad range of radiation frequency.…”

Development of a solenoid magnet for emittance compensation

“…This study investigates the use of a free-electron laser (FEL) based accelerator source for generating intense THz radiation. Our target is to achieve tunable frequencies ranging from 0.5 to 5.0 THz, characterized by high peak power and narrow bandwidth [1]. To accomplish this, we focus on attaining a high-brightness electron source capable of delivering high bunch charge (nC), low emittance, and short bunch length.…”