RuPAC2021 - List of Authors (Lesiv, N.A.)

Paper	Title	Page
TUPSB20	Selection of a System for Correcting the Energy Spread of Relativistic Electron Bunches for a Free Electron Laser	268
	A. Altmark, N.A. Lesiv, K. Mukhamedgaliev LETI, Saint-Petersburg, Russia
	The object of this work is a device called dechirper, which is used to decrease energy spread in relativistic electron bunch for free electron laser application. This system is based on cylindrical dielectric waveguide with vacuum channel needed for electron bunch passing. The Vavilov-Cherenkov radiation excited in waveguide is used to profile electromagnetic field inside the bunch and as a consequence to achieve the required energy distribution. The work includes numerical modeling of the electron beam passage through a waveguide structure, the generation of wake radiation and the interaction of this radiation with an electron bunch. We made original code to carry out numerical modeling, where the method of macroparticles and the method of Green’s function are implemented. The dependences of the energy compression coefficient and the length at which the maximum energy compression coefficient is achieved on various parameters of the dielectric waveguide structure and the physical parameters of electron bunches were identified. Various recommendations were also made on the choice of a waveguide used as a dechirper.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB20
About •	Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 08 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPSB21	System for Correcting the Longitudinal Length of Electron Bunches for Generation a Free Electron Laser	271
	A. Altmark, N.A. Lesiv, K. Mukhamedgaliev LETI, Saint-Petersburg, Russia
	The chicane is device for longitudinal compression of electron bunch for generation of coherent radiation in free electron laser. It is present a numerical simulation of beam dynamics passing through system which consist dielectric waveguide and four dipole magnets. The simulations made with use the modified Euler method based on Green function knowledge for cylindrical dielectric waveguide. We researched influence of various physical parameters of the electron bunch, as well as the chicane parameters on the change in the longitudinal bunch length. The optimal parameters of the focusing system were proposed for a relativistic particle beam with given initial bunch parameters. Recommendations for the selection of chicane parameters are also presented.
DOI •	reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB21
About •	Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Selection of a System for Correcting the Energy Spread of Relativistic Electron Bunches for a Free Electron Laser

268

A. Altmark, N.A. Lesiv, K. Mukhamedgaliev
LETI, Saint-Petersburg, Russia

The object of this work is a device called dechirper, which is used to decrease energy spread in relativistic electron bunch for free electron laser application. This system is based on cylindrical dielectric waveguide with vacuum channel needed for electron bunch passing. The Vavilov-Cherenkov radiation excited in waveguide is used to profile electromagnetic field inside the bunch and as a consequence to achieve the required energy distribution. The work includes numerical modeling of the electron beam passage through a waveguide structure, the generation of wake radiation and the interaction of this radiation with an electron bunch. We made original code to carry out numerical modeling, where the method of macroparticles and the method of Green’s function are implemented. The dependences of the energy compression coefficient and the length at which the maximum energy compression coefficient is achieved on various parameters of the dielectric waveguide structure and the physical parameters of electron bunches were identified. Various recommendations were also made on the choice of a waveguide used as a dechirper.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB20

About •

Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 08 October 2021

Cite •

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

TUPSB21

System for Correcting the Longitudinal Length of Electron Bunches for Generation a Free Electron Laser

271

A. Altmark, N.A. Lesiv, K. Mukhamedgaliev
LETI, Saint-Petersburg, Russia

The chicane is device for longitudinal compression of electron bunch for generation of coherent radiation in free electron laser. It is present a numerical simulation of beam dynamics passing through system which consist dielectric waveguide and four dipole magnets. The simulations made with use the modified Euler method based on Green function knowledge for cylindrical dielectric waveguide. We researched influence of various physical parameters of the electron bunch, as well as the chicane parameters on the change in the longitudinal bunch length. The optimal parameters of the focusing system were proposed for a relativistic particle beam with given initial bunch parameters. Recommendations for the selection of chicane parameters are also presented.

DOI •

reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-TUPSB21

About •

Received ※ 27 September 2021 — Revised ※ 28 September 2021 — Accepted ※ 29 September 2021 — Issued ※ 21 October 2021

Cite •

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