FEL2012 - List of Authors (Thongbai, C.)

Paper	Title	Page
WEPD32	Injector System for Linac-based Infrared Free-electron Laser in Thailand	441
	S. Rimjaem, P. Boonpornprasert, J. Saisut, S. Suphakul, C. Thongbai Chiang Mai University, Chiang Mai, Thailand S. Chunjarean ThEP Center, Commission on Higher Education, Bangkok, Thailand
	Funding: This work has been supported by the Department of Physics and Materials Science at Chiang Mai University, the Thailand Center of Excellence in Physics, and the Thailand Research Fund. A possibility to develop a compact linac-based Infrared Free-electron Laser (IR-FEL) facility has been studied at Chiang Mai University (CMU) in Thailand. Characteristics of the emitted FEL light and reliability in operation of the facility are determined by the properties of an electron injection system, an undulator, and an optical cavity. The proposed injector system for the future IR-FEL is based on the RF linear accelerator system at the Plasma and Beam Physics Research facility (PBP-linac) at CMU. However, the required electron beam properties for the IR-FEL are different from the current available electron beams from the PBP-linac. Numerical and experimental studies to modify the existing system to be able to drive the IR-FEL have been performed. The results of the studies and the proposed injector system parameters will be presented in this contribution.

WEPD34	Beam Dynamics Simulation and Optimization of Electron Beam Properties for IR-FELs at Chiang Mai University	445
	S. Suphakul, S. Rimjaem, C. Thongbai Chiang Mai University, Chiang Mai, Thailand
	Funding: This work has been supported by the Department of Physics and Materials Science at Chiang Mai University, the Thailand Center of Excellence in Physics, and the Thailand Research Fund. The linear accelerator system at the Plasma and Beam Physics Research Facility (PBP), Chiang Mai University (CMU), Thailand, has been under a plan to extend its function to be an injector system for the Infrared Free-electron Lasers (IR-FELs). The current system consists of an S-band thermionic cathode RF-gun, a bunch compressor in a form of alpha-magnet and a 3-m SLAC-type linear accelerator. The current system will be modified to generate the electron beam with the properties suitable for the IR-FELs. Numerical simulations have been performed to investigate and optimize the electron beam parameters. The planned modification of the system and optimization of the electron beam parameters will be presented in this contribution.

WEPD52	THz Radiation Sources based on RF-linac at Chiang Mai University	492
	C. Thongbai, P. Boonpornprasert, S. Chunjarean, K. Kusoljariyakul, S. Rimjaem, J. Saisut, S. Suphakul Chiang Mai University, Chiang Mai, Thailand
	A THz radiation source in a form of coherent radiation from short electron bunches has been constructed at the Plasma and Beam Physics (PBP) research facility, Chiang Mai University. The accelerator system consists of an RF-gun with a thermionic cathode, an alpha-magnet as a magnetic bunch compressor, and a SLAC-type linear accelerator. Coherent transition radiation emitted from short electron bunches passing through an Al-vacuum interface was used as the THz radiation source. This THz radiation can be used as a source of the THz imaging system and THz spectroscopy. Details of the accelerator system and THz radiation production will be presented. A plan for extension to accommodate Free Electron Lasers (FEL) optimized for mid-infrared and far-infrared/THz radiation will also be discussed.

WEPD53	Linac-based THz Imaging at Chiang Mai University	496
	J. Saisut, S. Rimjaem Chiang Mai University, Chiang Mai, Thailand P. Boonpornprasert, K. Kusoljariyakul, M.W. Rhodes, C. Thongbai ThEP Center, Commission on Higher Education, Bangkok, Thailand P. Thamboon IST, Chiang Mai, Thailand
	Funding: the Thailand Center of Excellence in Physics (ThEP), the National Research Council of Thailand (NRCT) and the Thailand Research Fund (TRF) At the Plasma and Beam Physics Research Facility (PBP), Chiang Mai University, intense THz radiation is generated in a form of coherent transition radiation from femtosecond electron bunches. The THz radiation is used as a source of THz imaging system which was successfully setup and tested. The radiation is focused onto a sample which will be scanned using an xy-translation stage. The transmission or reflection at different points of the sample are recorded to construct a THz image. Details of the setup and the experimental results from the system will be presented. The THz imaging to accommodate a future IR-THz Free Electron Laser (FEL) will also be discussed.

Paper

Title

Page

Injector System for Linac-based Infrared Free-electron Laser in Thailand

441

S. Rimjaem, P. Boonpornprasert, J. Saisut, S. Suphakul, C. Thongbai
Chiang Mai University, Chiang Mai, Thailand
S. Chunjarean
ThEP Center, Commission on Higher Education, Bangkok, Thailand

Funding: This work has been supported by the Department of Physics and Materials Science at Chiang Mai University, the Thailand Center of Excellence in Physics, and the Thailand Research Fund.
A possibility to develop a compact linac-based Infrared Free-electron Laser (IR-FEL) facility has been studied at Chiang Mai University (CMU) in Thailand. Characteristics of the emitted FEL light and reliability in operation of the facility are determined by the properties of an electron injection system, an undulator, and an optical cavity. The proposed injector system for the future IR-FEL is based on the RF linear accelerator system at the Plasma and Beam Physics Research facility (PBP-linac) at CMU. However, the required electron beam properties for the IR-FEL are different from the current available electron beams from the PBP-linac. Numerical and experimental studies to modify the existing system to be able to drive the IR-FEL have been performed. The results of the studies and the proposed injector system parameters will be presented in this contribution.

WEPD34

Beam Dynamics Simulation and Optimization of Electron Beam Properties for IR-FELs at Chiang Mai University

445

S. Suphakul, S. Rimjaem, C. Thongbai
Chiang Mai University, Chiang Mai, Thailand

Funding: This work has been supported by the Department of Physics and Materials Science at Chiang Mai University, the Thailand Center of Excellence in Physics, and the Thailand Research Fund.
The linear accelerator system at the Plasma and Beam Physics Research Facility (PBP), Chiang Mai University (CMU), Thailand, has been under a plan to extend its function to be an injector system for the Infrared Free-electron Lasers (IR-FELs). The current system consists of an S-band thermionic cathode RF-gun, a bunch compressor in a form of alpha-magnet and a 3-m SLAC-type linear accelerator. The current system will be modified to generate the electron beam with the properties suitable for the IR-FELs. Numerical simulations have been performed to investigate and optimize the electron beam parameters. The planned modification of the system and optimization of the electron beam parameters will be presented in this contribution.

WEPD52

THz Radiation Sources based on RF-linac at Chiang Mai University

492

C. Thongbai, P. Boonpornprasert, S. Chunjarean, K. Kusoljariyakul, S. Rimjaem, J. Saisut, S. Suphakul
Chiang Mai University, Chiang Mai, Thailand

A THz radiation source in a form of coherent radiation from short electron bunches has been constructed at the Plasma and Beam Physics (PBP) research facility, Chiang Mai University. The accelerator system consists of an RF-gun with a thermionic cathode, an alpha-magnet as a magnetic bunch compressor, and a SLAC-type linear accelerator. Coherent transition radiation emitted from short electron bunches passing through an Al-vacuum interface was used as the THz radiation source. This THz radiation can be used as a source of the THz imaging system and THz spectroscopy. Details of the accelerator system and THz radiation production will be presented. A plan for extension to accommodate Free Electron Lasers (FEL) optimized for mid-infrared and far-infrared/THz radiation will also be discussed.

WEPD53

Linac-based THz Imaging at Chiang Mai University

496

J. Saisut, S. Rimjaem
Chiang Mai University, Chiang Mai, Thailand
P. Boonpornprasert, K. Kusoljariyakul, M.W. Rhodes, C. Thongbai
ThEP Center, Commission on Higher Education, Bangkok, Thailand
P. Thamboon
IST, Chiang Mai, Thailand

Funding: the Thailand Center of Excellence in Physics (ThEP), the National Research Council of Thailand (NRCT) and the Thailand Research Fund (TRF)
At the Plasma and Beam Physics Research Facility (PBP), Chiang Mai University, intense THz radiation is generated in a form of coherent transition radiation from femtosecond electron bunches. The THz radiation is used as a source of THz imaging system which was successfully setup and tested. The radiation is focused onto a sample which will be scanned using an xy-translation stage. The transmission or reflection at different points of the sample are recorded to construct a THz image. Details of the setup and the experimental results from the system will be presented. The THz imaging to accommodate a future IR-THz Free Electron Laser (FEL) will also be discussed.