RuPAC2016 - List of Keywords (wakefield)

Paper	Title	Other Keywords	Page
TUPSA041	High-Energy Micro-Buncher Based on the mm-Wavelength Dielectric Structure	proton, electron, plasma, quadrupole	303
	A.V. Petrenko CERN, Geneva, Switzerland I.L. Sheinman LETI, Saint-Petersburg, Russia
	The proton-driven plasma wakefield acceleration is a recently proposed technique promising a GeV/m rate of acceleration to a TeV-scale energy in a single plasma stage. In order to excite high-amplitude plasma wakefields a long proton bunch from a synchrotron should be broken into a sequence of sub-mm long micro-bunches which can drive the plasma oscillations resonantly. We suggest a novel approach to produce the required train of micro-bunches using collinear wakefield acceleration in a dielectric-loaded structures. First the energy modulation is introduced into the proton beam with the help of the mm-wavelength dielectric accelerating structure. Then the energy modulation is transformed into the longitudinal micro-bunching using proton beamline with magnetic dipoles. Beam dynamics simulations were used to find the appropriate parameters of the dielectric accelerating structure, driving electron bunch and the beam focusing system.
	Poster TUPSA041 [0.792 MB]
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TUPSA042	Software Complex "Dynpart" for the Calculation of Self-Consistent Beam Dynamics in Dielectric Wakefield Accelerating Structures	electron, acceleration, focusing, software	307
	I.L. Sheinman, A.E. Yakushkin LETI, Saint-Petersburg, Russia
	Dielectric waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, beam manipulation, and also free electron lasers. A self-coordinated dynamics of relativistic particle beams in a single layer cylindrical waveguide with dielectric filling is investigated. The computer code is developed based on mathematical expressions for the analysis of the radial dynamics. The possibility of modeling interaction of different types of particles in a bunch is realized. Influence of both own wake fields and external fields of focusing and deflection systems on bunch dynamics are analyzed.
	Poster TUPSA042 [0.860 MB]
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TUPSA043	Wake Field Components in a Rectangular Accelerating Structure With Dielectric Anisotropic Loading	electron, acceleration, radiation, accelerating-gradient	310
	I.L. Sheinman, Yu.S. Sheinman LETI, Saint-Petersburg, Russia
	Dielectric lined waveguides are under extensive study as accelerating structures that can be excited by electron beams. Rectangular dielectric structures are used both in proof of principle experiments for new accelerating schemes and for studying the electronic properties of the structure loading material. Some of the materials used for the waveguide loading of accelerating structures possess significant anisotropic properties. General solutions for the fields generated by a relativistic electron beam propagating in a rectangular dielectric waveguide have been derived using the mode expansion method for the transverse operators of the Helmholtz equation. An expression for the combined Cherenkov and Coulomb fields obtained in terms of a superposition of LSM and LSE-modes of rectangular waveguide with anisotropic dielectric loading has been obtained. Numerical modeling of the longitudinal and transverse (deflecting) wakefields has been carried out. It is shown that the dielectric anisotropy influences to excitation parameters of the dielectric-lined waveguide with the anisotropic loading.
	Poster TUPSA043 [1.334 MB]
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WEPSB016	Coupled Bunch Instabilities in the Storage Rings	impedance, storage-ring, electron, synchrotron	395
	A.S. Smygacheva, Y.A. Fomin, V. Korchuganov NRC, Moscow, Russia
	Funding: The reported study was funded by RFBR according to the research project No. 16-32-00335 mol_a. Coherent instabilities of the bunched beam are one of the reasons that limit a total beam current in the storage rings. Although there are solutions of this problem, the estimation and reduction of wake-fields influence on the longitudinal beam dynamics remain important things. In the article we return to the subject of coherent instabilities of the unevenly-filled bunches in the storage rings.
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WEPSB018	Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric	radiation, focusing, electron, quadrupole	401
	A. Altmark LETI, Saint-Petersburg, Russia A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio, USA
	Funding: Grant 15-02-08745 from the Russian Foundation for Basic Research. The present work involves modeling the electron beams dynamics for development of new THz source based on cylindrical dielectric waveguide. The sequence of relativistic electron bunch generates Cherenkov radiation, which is a superposition of the TM and HEM-modes. The distances between bunches is selected for creating of monochromatic THz radiation. We made calculation of beam dynamics taking into account the Space Charge and focusing field with help of original BBU 3000 code. We present result for different parameters of waveguide and different offsets of bunches. The main parameter of radiation was investigated: length of wave pocket, monochromaticity and frequency. Altmark A, Kanareykin A. The source of THz radiation based on dielectric waveguide excited by sequence of electron bunches// 2016 J. Phys.: Conf. Ser. 732 012037
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Paper

Title

Other Keywords

Page

TUPSA041

High-Energy Micro-Buncher Based on the mm-Wavelength Dielectric Structure

proton, electron, plasma, quadrupole

303

A.V. Petrenko
CERN, Geneva, Switzerland
I.L. Sheinman
LETI, Saint-Petersburg, Russia

The proton-driven plasma wakefield acceleration is a recently proposed technique promising a GeV/m rate of acceleration to a TeV-scale energy in a single plasma stage. In order to excite high-amplitude plasma wakefields a long proton bunch from a synchrotron should be broken into a sequence of sub-mm long micro-bunches which can drive the plasma oscillations resonantly. We suggest a novel approach to produce the required train of micro-bunches using collinear wakefield acceleration in a dielectric-loaded structures. First the energy modulation is introduced into the proton beam with the help of the mm-wavelength dielectric accelerating structure. Then the energy modulation is transformed into the longitudinal micro-bunching using proton beamline with magnetic dipoles. Beam dynamics simulations were used to find the appropriate parameters of the dielectric accelerating structure, driving electron bunch and the beam focusing system.

Poster TUPSA041 [0.792 MB]

Export •

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

TUPSA042

Software Complex "Dynpart" for the Calculation of Self-Consistent Beam Dynamics in Dielectric Wakefield Accelerating Structures

electron, acceleration, focusing, software

307

I.L. Sheinman, A.E. Yakushkin
LETI, Saint-Petersburg, Russia

Dielectric waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, beam manipulation, and also free electron lasers. A self-coordinated dynamics of relativistic particle beams in a single layer cylindrical waveguide with dielectric filling is investigated. The computer code is developed based on mathematical expressions for the analysis of the radial dynamics. The possibility of modeling interaction of different types of particles in a bunch is realized. Influence of both own wake fields and external fields of focusing and deflection systems on bunch dynamics are analyzed.

Poster TUPSA042 [0.860 MB]

Export •

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

TUPSA043

Wake Field Components in a Rectangular Accelerating Structure With Dielectric Anisotropic Loading

electron, acceleration, radiation, accelerating-gradient

310

I.L. Sheinman, Yu.S. Sheinman
LETI, Saint-Petersburg, Russia

Dielectric lined waveguides are under extensive study as accelerating structures that can be excited by electron beams. Rectangular dielectric structures are used both in proof of principle experiments for new accelerating schemes and for studying the electronic properties of the structure loading material. Some of the materials used for the waveguide loading of accelerating structures possess significant anisotropic properties. General solutions for the fields generated by a relativistic electron beam propagating in a rectangular dielectric waveguide have been derived using the mode expansion method for the transverse operators of the Helmholtz equation. An expression for the combined Cherenkov and Coulomb fields obtained in terms of a superposition of LSM and LSE-modes of rectangular waveguide with anisotropic dielectric loading has been obtained. Numerical modeling of the longitudinal and transverse (deflecting) wakefields has been carried out. It is shown that the dielectric anisotropy influences to excitation parameters of the dielectric-lined waveguide with the anisotropic loading.

Poster TUPSA043 [1.334 MB]

Export •

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

WEPSB016

Coupled Bunch Instabilities in the Storage Rings

impedance, storage-ring, electron, synchrotron

395

A.S. Smygacheva, Y.A. Fomin, V. Korchuganov
NRC, Moscow, Russia

Funding: The reported study was funded by RFBR according to the research project No. 16-32-00335 mol_a.
Coherent instabilities of the bunched beam are one of the reasons that limit a total beam current in the storage rings. Although there are solutions of this problem, the estimation and reduction of wake-fields influence on the longitudinal beam dynamics remain important things. In the article we return to the subject of coherent instabilities of the unevenly-filled bunches in the storage rings.

Export •

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

WEPSB018

Beam Dynamics Calculation of Electron Bunch Sequence Passing Through Dielectric

radiation, focusing, electron, quadrupole

401

A. Altmark
LETI, Saint-Petersburg, Russia
A. Kanareykin
Euclid TechLabs, LLC, Solon, Ohio, USA

Funding: Grant 15-02-08745 from the Russian Foundation for Basic Research.
The present work involves modeling the electron beams dynamics for development of new THz source based on cylindrical dielectric waveguide. The sequence of relativistic electron bunch generates Cherenkov radiation, which is a superposition of the TM and HEM-modes. The distances between bunches is selected for creating of monochromatic THz radiation*. We made calculation of beam dynamics taking into account the Space Charge and focusing field with help of original BBU 3000 code. We present result for different parameters of waveguide and different offsets of bunches. The main parameter of radiation was investigated: length of wave pocket, monochromaticity and frequency.
* Altmark A, Kanareykin A. The source of THz radiation based on dielectric waveguide excited by sequence of electron bunches// 2016 J. Phys.: Conf. Ser. 732 012037

Export •

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