RuPAC2021 - List of Keywords (undulator)

Paper	Title	Other Keywords	Page
TUC03	Development of Powerful Long-Pulse THz-Band FEL Driven by Linear Induction Accelerator	FEL, electron, experiment, simulation	58
	N.Yu. Peskov, V.I. Belousov, N.S. Ginzburg, D.I. Sobolev, V.Yu. Zaslavsky IAP/RAS, Nizhny Novgorod, Russia A.V. Arzhannikov, D.A. Nikiforov, E.S. Sandalov, S.L. Sinitsky, D.I. Skovorodin, A.A. Starostenko, K.I. Zhivankov BINP SB RAS, Novosibirsk, Russia
	Funding: This work is supported by the Russian Science Foundation (grant #19-12-00212). Project of high-power long-pulse THz-band FEL is under development in collaboration between BINP (Novosibirsk) and IAP RAS (N.Novgorod) driven by the linac LIU 5 - 20 MeV / 2 kA / 200 ns. The aim of this project is to achieve a record sub-GW power level and pulse energy content up to 10 - 100 J at THz frequencies. Principal problems in realization of this generator include: formation of the electron beam with parameters acceptable for operation in the short-wavelength ranges, development of undulator for pumping operating transverse oscillations in the beam, and elaboration of electrodynamic system that can provide stable narrow-band oscillation regime in a strongly oversized interaction space. Initial proof-of-principle experiments are planned to start at the LIU-5 accelerator in the 0.3 THz frequency range, with prospects of transition to 0.6 THz range and higher frequencies after positive results would be demonstrated. In the report, the design parameters of the FEL project are discussed. Results of electron-optical experiments on the beam formation are presented. Structural elements of the FEL magnetic system based on helical undulator and a guide solenoid that provides intense beam transportation were elaborated. An electrodynamic system was proposed exploiting advanced Bragg structures, which have significantly improved selective properties. Structures of such type were designed with the diameter of 20 and 40 wavelengths for operation in specified frequency ranges.
	Slides TUC03 [4.780 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC03
About •	Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 28 September 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB22	Wakefield Undulator Based on a Sinusoidal Dielectric Waveguide	GUI, electron, wakefield, radiation	274
	I.L. Sheinman, O.S. Alekseeva LETI, Saint-Petersburg, Russia
	The idea of creating an undulator based on the wake principle by passing a beam through a sinusoidal dielectric waveguide is proposed. A numerical analysis of the dynamics of a short electron beam in a wake undulator on a bending wave of a waveguide with a dielectric filling is carried out. The possibility of reducing the instability of the beam by choosing the initial phase of the flexural wave and the initial transverse positioning of the beam is considered.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB22
About •	Received ※ 19 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 28 September 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB32	Emission of Photons at the Interaction of a High-Energy Positron Beam with a Periodically Deformed Crystal	radiation, positron, photon, experiment	289
	A.A. Yanovich, A.G. Afonin, G.I. Britvich, M.Yu. Chesnokov, Y.A. Chesnokov, A.A. Durum, M.Yu. Kostin, I.S. Lobanov, V.I. Pitalev, I.V. Poluektov, Yu.E. Sandomirskiy IHEP, Moscow Region, Russia
	Funding: Russian science foundation (grant 17-12-01532) Periodically deformed crystals have long attracted at-tention as "crystalline undulators". In the experi-ment carried out at the U-70 accelerator, the radiation of positrons moving in a periodically deformed crystal was observed. Experimental evidence has been obtained for an undulator peak in a radiation spectrum, which is quali-tatively consistent with calculations. It is shown that most of the emitted energy is due to hard photons with energies of tens of MeV as a result of channeling and reflection of particles, whose spectral density is several times higher than the radiation in an amorphous target.
	Poster TUPSB32 [0.864 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB32
About •	Received ※ 06 September 2021 — Accepted ※ 10 September 2021 — Issued ※ 17 September 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUC03

Development of Powerful Long-Pulse THz-Band FEL Driven by Linear Induction Accelerator

FEL, electron, experiment, simulation

58

N.Yu. Peskov, V.I. Belousov, N.S. Ginzburg, D.I. Sobolev, V.Yu. Zaslavsky
IAP/RAS, Nizhny Novgorod, Russia
A.V. Arzhannikov, D.A. Nikiforov, E.S. Sandalov, S.L. Sinitsky, D.I. Skovorodin, A.A. Starostenko, K.I. Zhivankov
BINP SB RAS, Novosibirsk, Russia

Funding: This work is supported by the Russian Science Foundation (grant #19-12-00212).
Project of high-power long-pulse THz-band FEL is under development in collaboration between BINP (Novosibirsk) and IAP RAS (N.Novgorod) driven by the linac LIU 5 - 20 MeV / 2 kA / 200 ns. The aim of this project is to achieve a record sub-GW power level and pulse energy content up to 10 - 100 J at THz frequencies. Principal problems in realization of this generator include: formation of the electron beam with parameters acceptable for operation in the short-wavelength ranges, development of undulator for pumping operating transverse oscillations in the beam, and elaboration of electrodynamic system that can provide stable narrow-band oscillation regime in a strongly oversized interaction space. Initial proof-of-principle experiments are planned to start at the LIU-5 accelerator in the 0.3 THz frequency range, with prospects of transition to 0.6 THz range and higher frequencies after positive results would be demonstrated. In the report, the design parameters of the FEL project are discussed. Results of electron-optical experiments on the beam formation are presented. Structural elements of the FEL magnetic system based on helical undulator and a guide solenoid that provides intense beam transportation were elaborated. An electrodynamic system was proposed exploiting advanced Bragg structures, which have significantly improved selective properties. Structures of such type were designed with the diameter of 20 and 40 wavelengths for operation in specified frequency ranges.

Slides TUC03 [4.780 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUC03

About •

Received ※ 24 September 2021 — Revised ※ 25 September 2021 — Accepted ※ 27 September 2021 — Issued ※ 28 September 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB22

Wakefield Undulator Based on a Sinusoidal Dielectric Waveguide

GUI, electron, wakefield, radiation

274

I.L. Sheinman, O.S. Alekseeva
LETI, Saint-Petersburg, Russia

The idea of creating an undulator based on the wake principle by passing a beam through a sinusoidal dielectric waveguide is proposed. A numerical analysis of the dynamics of a short electron beam in a wake undulator on a bending wave of a waveguide with a dielectric filling is carried out. The possibility of reducing the instability of the beam by choosing the initial phase of the flexural wave and the initial transverse positioning of the beam is considered.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB22

About •

Received ※ 19 September 2021 — Accepted ※ 20 September 2021 — Issued ※ 28 September 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB32

Emission of Photons at the Interaction of a High-Energy Positron Beam with a Periodically Deformed Crystal

radiation, positron, photon, experiment

289

A.A. Yanovich, A.G. Afonin, G.I. Britvich, M.Yu. Chesnokov, Y.A. Chesnokov, A.A. Durum, M.Yu. Kostin, I.S. Lobanov, V.I. Pitalev, I.V. Poluektov, Yu.E. Sandomirskiy
IHEP, Moscow Region, Russia

Funding: Russian science foundation (grant 17-12-01532)
Periodically deformed crystals have long attracted at-tention as "crystalline undulators". In the experi-ment carried out at the U-70 accelerator, the radiation of positrons moving in a periodically deformed crystal was observed. Experimental evidence has been obtained for an undulator peak in a radiation spectrum, which is quali-tatively consistent with calculations. It is shown that most of the emitted energy is due to hard photons with energies of tens of MeV as a result of channeling and reflection of particles, whose spectral density is several times higher than the radiation in an amorphous target.

Poster TUPSB32 [0.864 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB32

About •

Received ※ 06 September 2021 — Accepted ※ 10 September 2021 — Issued ※ 17 September 2021

Cite •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)