High-quality beam generation using an RF gun and a 150MeV microtron

R. Kuroda, M. Washio, S. Kashiwagi, T. Kobuki, I. Ben-Zvi, X. J. Wang, T. Hori, F. Sakai, A. Tsunemi, J. Urakawa, T. Hirose

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Low-emittance sub-picosecond electron pulses are expected to be used in a wide field, such as free electron laser, laser acceleration, femtosecond X-ray generation by Inverse Compton scattering, pulse radiolysis, etc. In order to produce the low-emittance sub-picosecond electron pulse, we are developing a compact Racetrack Microtron (RTM) with a new 5 MeV injection system adopting a laser photo cathode RF gun (Washio et al., Seventh China-Japan Bilateral Symposium on Radiation Chemistry, October 28, Cengdu, China, 1996). The operation of RTM has been kept under a steady state of beam loading for long pulse mode so far (Washio et al., J. Surf. Sci. Soc. Jpn. 19 (2) (1998) 23). In earlier work (Washio et al., PAC99, March 31, New York, USA, 1999), we have succeeded in the numerical simulation for the case of single short pulse acceleration. Finally, the modified RTM was demonstrated as a useful accelerator for a picosecond electron pulse generation under a transient state of beam loading. In the simulation, a picosecond electron pulse was accelerated to 149.6 MeV in RTM for the injection of 5 MeV electron bunch with a pulse length of 10ps (FWHM), a charge of 1 nC per pulse, and an emittance of 3 πmm mrad.

Original languageEnglish
Pages (from-to)222-227
Number of pages6
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
Publication statusPublished - 2000 Nov 21


  • Electron beam
  • Laser photo-cathode RF gun
  • Racetrack microtron


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