Speaker
Konstantin Lekomtsev
(KEK)
Description
In the past decade accelerator based sources of THz radiation have seen progress in generation of short femtosecond duration electron bunches as well as in THz radiators development. Capillary structures capable of producing powerful Cherenkov radiation wakefields have been used for THz radiation generation [1] as well as for energy modulation in electron beams [2]. Introduction of the corrugation into the Cherenkov based capillary structure for THz radiation generation increases the device tunability due to the mechanism of Smith-Purcell radiation (SPR) [3].
LUCX accelerator at High Energy Accelerator Research Organisation (KEK) produces short, hundreds of femtoseconds duration electron micro-bunches with variable repetition frequency, allowing to generate tunable SPR. Corrugated and non-corrugated capillaries manufactured as sets of dielectric cylindrical rings, together with holders and radiation reflectors, are now ready for experimental study. Simulations of the spectral response for geometries with and without corrugation as well as influence of the radiation reflector on radiation directivity pattern will be discussed. Checks of manufacturing accuracy, performed using laser scanning microscope, will be presented as well.
1. A.M. Cook et al., PRL 103, 095003 (2009).
2. S. Antipov et al., PRL 108, 144801 (2012).
3. A.A. Ponomarenko, M.I. et al., NIM B 309, 223 (2013).
Author
Konstantin Lekomtsev
(KEK)
Co-authors
Alex Aryshev
(KEK)
Alexey Tishchenko
(National Research Nuclear University (MEPhI))
Alexsandr Ponomarenko
(National Research Nuclear University “MEPhI”)
Prof.
M.N. Strikhanov
(National Research Nuclear University (MEPhI))
Nobuhiro Terunuma
(KEK)
Vasily Sukharev
(National Research Nuclear University (MEPhI))
junji urakawa
(kek)
