Cavity optimization for compact accelerator-based free-electron maser

A. Aryshev*, D. Verigin, S. Araki, M. Fukuda, P. Karataev, G. Naumenko, A. Potylitsyn, Kazuyuki Sakaue, L. Sukhikh, N. Terunuma, J. Urakawa

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In previous works [1] we have successfully commissioned pre-bunched beam pumped free electron maser based on Stimulated Coherent Diffraction Radiation (SCDR) generated in an open resonator. An ultra-fast Schottky Barrier Diode (SBD) detector has enabled us to investigate the properties of the radiation in the range from 3 to 5 mm of wavelengths among broad frequencies stored in the cavity as well as the intrinsic properties of the cavity itself. We observed a turn-by-turn SCDR generated by a multibunch electron beam and directly measured the opened cavity quality factor of 11.4. In this report we represent the work directly related to optimization of both the maser system to achieve higher quality factor of the cavity essential to gain soft X-ray production via Thomson scattering in the next stage of the experiment and measurement system for better characterization of the maser light. One way of optimization is to minimize losses of energy due to transmission through resonator mirrors. For this purpose we have designed and constructed a test setup to investigate reflection and transmission properties of different mirror materials. Theoretical calculations have been performed using optical constants and theoretical models of electrical permittivity to compare with experimental results. In this report we summarize the experimental activity, represent new experimental results and represent steps undertaken to achieve the new resonator mirror design. For better understanding of the resonator performance a test of the SBD detector linearity is also demonstrated.

Original languageEnglish
Title of host publicationProceedings - 2012 7th International Forum on Strategic Technology, IFOST 2012
Publication statusPublished - 2012
Event2012 7th International Forum on Strategic Technology, IFOST 2012 - Tomsk
Duration: 2012 Sept 182012 Sept 21


Other2012 7th International Forum on Strategic Technology, IFOST 2012


  • cavity optimisation
  • coherent radiation
  • diffraction radiation
  • maser
  • resonator
  • stimulated radiation
  • transmission coefficient

ASJC Scopus subject areas

  • Management of Technology and Innovation


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