TY - GEN
T1 - Broadband Terahertz Undulator Radiation from Short Electron Bunches into the Dominant Mode of an Oversized Waveguide
AU - Balal, Nezah
AU - Bratman, Vladimir L.
AU - Lurie, Yuri
AU - Magory, Eyal
N1 - Publisher Copyright:
© 2021 IEEE
PY - 2021
Y1 - 2021
N2 - A possibility to generate wideband terahertz pulses of Coherent Spontaneous Radiation with energies of hundreds of microjoules and a relatively high efficiency in regimes close to group synchronism of electrons with the mode of a circular waveguide has been demonstrated in simulations. As a magnetic system of the THz source providing a large undulator parameter K> 1, it is proposed to use the simplest helical undulator formed by several permanently magnetized ferromagnetic helices. The use of a preliminary energetic chirp of particles and stabilization of the bunch in the field of the emitted electromagnetic pulse makes it possible to mitigate the effects of Coulomb repulsion of particles and to increase the length of the effective interaction of a dense bunch with the field of the operating mode.
AB - A possibility to generate wideband terahertz pulses of Coherent Spontaneous Radiation with energies of hundreds of microjoules and a relatively high efficiency in regimes close to group synchronism of electrons with the mode of a circular waveguide has been demonstrated in simulations. As a magnetic system of the THz source providing a large undulator parameter K> 1, it is proposed to use the simplest helical undulator formed by several permanently magnetized ferromagnetic helices. The use of a preliminary energetic chirp of particles and stabilization of the bunch in the field of the emitted electromagnetic pulse makes it possible to mitigate the effects of Coulomb repulsion of particles and to increase the length of the effective interaction of a dense bunch with the field of the operating mode.
UR - http://www.scopus.com/inward/record.url?scp=85125329857&partnerID=8YFLogxK
U2 - 10.1109/IRMMW-THz50926.2021.9567241
DO - 10.1109/IRMMW-THz50926.2021.9567241
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AN - SCOPUS:85125329857
T3 - International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz
BT - 2021 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
PB - IEEE Computer Society
T2 - 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
Y2 - 30 August 2021 through 3 September 2021
ER -