RUPAC2012 - List of Authors (Kanareykin, A.)

Paper

Title

Page

Parameter Optimization of a Rectangular Dielectric Based Wakefield Accelerating Structure

260

S. Baturin, A. Altmark, I.L. Sheynman
LETI, Saint-Petersburg, Russia
A. Kanareykin
Euclid TechLabs, LLC, Solon, Ohio, USA

With this talk, we present the algorithm and simulation results of the wakefield parametric study of the rectangular dielectric based wakefield accelerating structure. Analytical solution of the wakefield generation in the rectangular dielectric structure has been considered to achieve optimal relations between both the geometrical parameters and dielectric constant of the structure, and the beam parameters like bunch charge and bunch length. Optimization has been carried out for maximization of the accelerating gradient at the single LSM11 mode approximation.

MOPPA010

Numerical and Analytical Methods of Modeling of Bunch Dynamics in Dielectric Filled Accelerating Structures

266

I.L. Sheynman
LETI, Saint-Petersburg, Russia
A. Kanareykin
Euclid TechLabs, LLC, Solon, Ohio, USA

RF waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, and also free electron lasers. Numerical and analytical calculation methods of Vavilov-Cherenkov radiation generated by relativistic electronic bunches in wave guides with dielectric filling, and also self-coordinated bunch dynamics in own and external fields are considered.

MOPPA014

Progress on Dielectric Based High Gradient Accelerator Development.

A. Kanareykin, S.P. Antipov, C.-J. Jing
Euclid TechLabs, LLC, Solon, Ohio, USA
W. Gai
ANL, Argonne, USA

Funding: Ministry of Education and Science of Russian Federation; the US Department of Energy
We present here our recent results of the Euclid Techlabs LLC/AWA of Argonne National Laboratory and St.Petersburg Electrotechnical University "LETI" collaboration on wakefield high energy acceleration of electron bunches in dielectric based accelerating structures*. This program concentrates primarily on Cherenkov radiation studies providing efficient high energy generation aimed at a future ~ TeV linear collider and a X-ray FEL light sources*. We report here on our recent experiments in high power Cherenkov generation, wakefields acceleration**,***, breakdown tests and corresponding dielectric material developments and characterizations. Progress in diamond, quartz and microwave low loss ceramic structure development in GHz and THz frequency ranges is presented***.
* A.Kanareykin. Journal of Physics, Conf. Ser., 236, p.012032, 2010.
** S.Antipov et al. Appl. Phys. Lett. 100, 132910, 2012.
*** A.Kanareykin. AIP Conference Proceedings, v. 1299, p. 286, 2010.

TUPPB029

Transverse Dynamics of a Ring Beam in a Coaxial Two-Channel Dielectric Waveguide

379

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

The most critical issue of wakefield accelerating schemes is transformer ratio (maximum energy gain of the witness bunch/maximum energy loss of the drive bunch) which cannot exceed 2 in collinear wakefield accelerator with use of Gaussian bunches. We observe new scheme of wakefield acceleration in collinear two-channel waveguide where accelerating field created by electron bunch with annular charge distribution passing in vacuum layer. This radiation is used for acceleration of witness beam which passing through central vacuum channel. These vacuumareas separated by dielectric tube. Transformer ratio for this scheme can be much greater than 2. The main problem of wakefield accelerators is transverse beam dynamics of the driver bunch, because of high value of its charge and low energy of the particles. We present results of the beam dynamics calculation of the annular drive beam by "macroparticle" method based on analytical expressions for Cerenkov radiation. The upgraded BBU-3000 code has been used for calculation of the beam dynamics in coaxial dielectric wakefield accelerating structures. It is shown that dynamics depends on radial and azimuthally structures of HEM modes excited by the drive beam there. Initial beam imperfections to the beam dynamics was carried out.

Paper	Title	Page
MOPPA008	Parameter Optimization of a Rectangular Dielectric Based Wakefield Accelerating Structure	260
	S. Baturin, A. Altmark, I.L. Sheynman LETI, Saint-Petersburg, Russia A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio, USA
	With this talk, we present the algorithm and simulation results of the wakefield parametric study of the rectangular dielectric based wakefield accelerating structure. Analytical solution of the wakefield generation in the rectangular dielectric structure has been considered to achieve optimal relations between both the geometrical parameters and dielectric constant of the structure, and the beam parameters like bunch charge and bunch length. Optimization has been carried out for maximization of the accelerating gradient at the single LSM11 mode approximation.

MOPPA010	Numerical and Analytical Methods of Modeling of Bunch Dynamics in Dielectric Filled Accelerating Structures	266
	I.L. Sheynman LETI, Saint-Petersburg, Russia A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio, USA
	RF waveguide structures are a basis for development of new generation of accelerators on the basis of a wakefield method of the charged particle acceleration, and also free electron lasers. Numerical and analytical calculation methods of Vavilov-Cherenkov radiation generated by relativistic electronic bunches in wave guides with dielectric filling, and also self-coordinated bunch dynamics in own and external fields are considered.

MOPPA014	Progress on Dielectric Based High Gradient Accelerator Development.
	A. Kanareykin, S.P. Antipov, C.-J. Jing Euclid TechLabs, LLC, Solon, Ohio, USA W. Gai ANL, Argonne, USA
	Funding: Ministry of Education and Science of Russian Federation; the US Department of Energy We present here our recent results of the Euclid Techlabs LLC/AWA of Argonne National Laboratory and St.Petersburg Electrotechnical University "LETI" collaboration on wakefield high energy acceleration of electron bunches in dielectric based accelerating structures. This program concentrates primarily on Cherenkov radiation studies providing efficient high energy generation aimed at a future ~ TeV linear collider and a X-ray FEL light sources. We report here on our recent experiments in high power Cherenkov generation, wakefields acceleration,, breakdown tests and corresponding dielectric material developments and characterizations. Progress in diamond, quartz and microwave low loss ceramic structure development in GHz and THz frequency ranges is presented*. A.Kanareykin. Journal of Physics, Conf. Ser., 236, p.012032, 2010. S.Antipov et al. Appl. Phys. Lett. 100, 132910, 2012. * A.Kanareykin. AIP Conference Proceedings, v. 1299, p. 286, 2010.

TUPPB029	Transverse Dynamics of a Ring Beam in a Coaxial Two-Channel Dielectric Waveguide	379
	A. Altmark LETI, Saint-Petersburg, Russia A. Kanareykin Euclid TechLabs, LLC, Solon, Ohio, USA
	The most critical issue of wakefield accelerating schemes is transformer ratio (maximum energy gain of the witness bunch/maximum energy loss of the drive bunch) which cannot exceed 2 in collinear wakefield accelerator with use of Gaussian bunches. We observe new scheme of wakefield acceleration in collinear two-channel waveguide where accelerating field created by electron bunch with annular charge distribution passing in vacuum layer. This radiation is used for acceleration of witness beam which passing through central vacuum channel. These vacuumareas separated by dielectric tube. Transformer ratio for this scheme can be much greater than 2. The main problem of wakefield accelerators is transverse beam dynamics of the driver bunch, because of high value of its charge and low energy of the particles. We present results of the beam dynamics calculation of the annular drive beam by "macroparticle" method based on analytical expressions for Cerenkov radiation. The upgraded BBU-3000 code has been used for calculation of the beam dynamics in coaxial dielectric wakefield accelerating structures. It is shown that dynamics depends on radial and azimuthally structures of HEM modes excited by the drive beam there. Initial beam imperfections to the beam dynamics was carried out.