| Paper | Title | Other Keywords | Page |
|---|---|---|---|
| TUPSB20 | Selection of a System for Correcting the Energy Spread of Relativistic Electron Bunches for a Free Electron Laser | electron, wakefield, radiation, ECR | 268 |
|
|||
| 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) | ||
| TUPSB22 | Wakefield Undulator Based on a Sinusoidal Dielectric Waveguide | undulator, electron, wakefield, radiation | 274 |
|
|||
| 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) | ||
| WEPSC01 | Unit for Matching a Driving Waveguide With a Cavity | cavity, ECR, coupling, Windows | 340 |
|
|||
| To match the driving waveguide, usually operating in the fundamental TE10 wave, with the accelerating structure, a device is required that performs the function of a wave-type transformer. In the microwave region, transforming devices with matching windows are usually used, the field distribution in which can also be described as TE-type. At the ends of the window from the side of the structure, regions with an increased density of Surface Currents (SC) inevitably arise, leading to an increase in the surface temperature in a place that is difficult to access for cooling. There are various solutions for matching windows, in order to reduce the maximum SC from the side of the structure , briefly mentioned in the report. A solution based on the dispersion properties of the waveguide and providing a significant additional decrease in the SC density is considered. This solution can be implemented in devices for S and lower frequency ranges. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC01 | ||
| About • | Received ※ 06 September 2021 — Revised ※ 20 September 2021 — Accepted ※ 24 September 2021 — Issued ※ 22 October 2021 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| WEPSC04 | Accelerating Structure of 8 MeV Electron Linac | electron, resonance, coupling, radiation | 346 |
|
|||
|
Linear resonance electron accelerator LU-10-20 is under operation in RFNC-VNIIEF since 1994*. LU-10-20 is aimed at carrying out radiation processing of materials and researching radiation processes. The energy of accelerated electrons is up to 10 MeV, the average beam power - up to 12 kW. This accelerator has demonstrated that it is highly useful for performing radiation researches and tests. As of today work is underway on modernization of LU-10-20 including its accelerating structure and RF power supply. Accelerating structure is aimed at electron beam acceleration up to nominal energy and consists of complicated resonance TW RF structure, which uncluded iris-loaded waveguide, input and output matching devices. The paper presents the electrodynamic calculation results of modernized accelerating structure, input and output matching devices, and also beam dynamics calculation results.
*N.V.Zavyalov et al. Commercial linear accelerator of electrons LU-10-20. Materials of the XV All-Union Seminar on Linear Accelerators of Charged Particles, Nucl. Phys. Res.No2, 3(29, 30),1997, p.39-41. |
|||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC04 | ||
| About • | Received ※ 28 September 2021 — Revised ※ 29 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 18 October 2021 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||
| WEPSC13 | Accelerating Cavities with HOM Damping for USSR-4 Storage Ring | HOM, cavity, impedance, damping | 367 |
|
|||
| Preliminary results on accelerating cavities for USSR-4 facility (also known as SYLA - SYnchrotron and free-electron LAser) project are presented. This facility is under development by collaboration hosted by National Research Center "Kurchatov Institute". SYLA is synchro-tron radiation facility based on injector linac and 6 GeV storage ring. Beam energy loss in storage ring is to be compensated by several modified pillbox cavities. Cavity geometry features, its operation frequency choice and induced HOM parameters are discussed. HOM damping technique using corrugated cylindrical waveguides were studied. Longitudinal impedance values of HOM are presented for initial accelerating cavity and structure with waveguides. | |||
| DOI • | reference for this paper ※ doi:10.18429/JACoW-RuPAC2021-WEPSC13 | ||
| About • | Received ※ 18 September 2021 — Revised ※ 30 September 2021 — Accepted ※ 09 October 2021 — Issued ※ 21 October 2021 | ||
| Cite • | reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml) | ||