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Design and Construction of a Far-infrared Free-electron Laser Driven by a Microtron by Jongmin Lee; Byung Cheol Lee; Young Uk Jeong; Sung Oh Cho; Sun Kook Kim; Byung Heon Cha; Gregory Kazakevich; Sergei Miginsky; Pavel Vovly; Gennady Kulipanov is a Physics and Astronomy article available to read on EtoBox.

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A far-infrared free-electron laser driven by a microtron has been developed. The free-electron laser system is continuously tunable in the wavelength range from 30 to 50 m. The energy of the electron beam is 7.5 MeV at maximum. The pulse duration and the repetition rate of the macropulses are 5 s and 10 Hz, respectively. The average current in a macropulse is 50 mA. In order to get high enough gain of the free electron laser, we developed a long electromagnetic undulator with high magnetic field strength. The period of the undulator is 12.5 mm and the number of the periods is 160. The peak magnetic field of the undulator is tunable from 4 to 6 kG at a fixed gap distance of 5 mm by changing the current through the electromagnet. More than 99% of the electron beam passed through the undulator. The results of numerical simulation show that the measured parameters of electron beam are good enough for lasing. Critical issues in lasing of the free-electron laser are discussed.

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Author

Jongmin Lee; Byung Cheol Lee; Young Uk Jeong; Sung Oh Cho; Sun Kook Kim; Byung Heon Cha; Gregory Kazakevich; Sergei Miginsky; Pavel Vovly; Gennady Kulipanov

Publisher

Elsevier Science; Elsevier ; Elsevier BV; ScienceOpen (ISSN 0168-9002)

Published

1998

Language

EN

Field

Physics and Astronomy (Physical Sciences)