Channeling 2018

Photonic Crystal-Based Compact High-Power Vacuum Electronic Devices

24 Sept 2018, 18:40

1h

Poster PS1 - Poster session

Speaker

Prof. Vladimir Baryshevsky (Belarusian state University, Institute for Nuclear Problems)

Description

Combining the photonic crystal-based structures with vacuum electronic devices opens the way for creation of a family of radiation sources: photonic BWOs, volume FELs (VFEL), etc. Some beneficial options of such structures, which enable tunability and increasing the radiation source efficiency, are discussed. The VFEL instability law declares start current for generator with the interaction length L to be determined by L^-5 rather than L^-3, thus enabling miniaturization of radiation source. Conditions enabling achievement of generation threshold and observation of THz single-frequency generation in a photonic BWO for electron beam parameters available at existing accelerators are discussed.

Summary

Combining the photonic crystal-based structures with vacuum electronic devices opens the way for creation of a family of radiation sources: volume FELs, photonic BWOs, etc. [1-7]. Some beneficial options become available, namely: use for radiation generation of multiple either pencil-like or sheet electron beams instead of single annular or sheet one and, thus, establishing the beam-wave interaction within the whole crystal cross-section and increasing the efficiency of radiation source [3-5].

One more option is given by the new instability law derived in [1,2,6,7], which declares start current for generator with the interaction length L to be determined by L-5 rather than L-3 even for one-dimensional interaction (the index of power grows with increasing of number of diffracted waves). This option enables miniaturization of radiation source.

Frequency tuning could be provided by change of photonic crystal geometry.

Conditions enabling to achieve generation threshold and to observe a single-frequency generation in THz range in a photonic BWO for electron beam parameters available at existing accelerators are discussed.

[1] V.G. Baryshevsky, I.D.Feranchuk, Parametric beam instability of relativistic charged particles in a crystal, Phys.Lett. A102 (1984) 141–144.

[2] Baryshevsky, V.G. Volume free electron lasers, NIM A445 (2000) 281–283.

[3] V.G. Baryshevsky, A.A. Gurinovich, Spontaneous and induced parametric and Smith-Purcell radiation from electrons moving in a photonic crystal built from the metallic threads, NIM B252(1), (2006), 92–101.

[4] V.G. Baryshevsky, A.A. Gurinovich, Electrodynamical properties of a volume free electron laser with ”grid” resonator , 28th International Free Electron Laser Conference: Proceedings of FEL2006. http://accelconf.web.cern.ch/AccelConf/f06/PAPERS/FEL2006-
Proceedings.pdf. — TUPPH013 (2006) 335–339.

[5] V.G. Baryshevsky, N.A. Belous, A.A. Gurinovich et al., Experimental study of a volume free electron laser with a ”grid” resonator, 28th International Free Electron Laser Conference, Berlin, Germany, 27 August – 1 September, 2006: Proceedings of FEL2006. http://accelconf.web.cern.ch/AccelConf/f06/PAPERS/FEL2006-Proceedings.pdf. — TUPPH012 (2006) 331–334.

[6] V.G. Baryshevsky, High Power Microwave and Optical Volume Free Electron Lasers (VFELs), LANL e-print arXiv:1211.4769v1 (2012).

[7] V.G. Baryshevsky Spontaneous and induced radiation by electrons/positrons in natural and photonic crystals. Volume free electron lasers (VFELs): From microwave and optical to X-ray range NIM B355 (2015) 17-23.