IPAC2018 - List of Authors (Aryshev, A.)

Paper	Title	Page
TUZGBD5	Performance of Nanometre-Level Resolution Cavity Beam Position Monitors at ATF2	1212
	T. Bromwich, D.R. Bett, N. Blaskovic Kraljevic, R.M. Bodenstein, P. Burrows, G.B. Christian, C. Perry, R.L. Ramjiawan JAI, Oxford, United Kingdom S. Araki, A. Aryshev, T. Tauchi, N. Terunuma KEK, Ibaraki, Japan P. Bambade, S. Wallon LAL, Orsay, France S.W. Jang Korea University Sejong Campus, Sejong, Republic of Korea
	A system of three low-Q cavity beam position monitors (BPMs), installed in the interaction point (IP) region of the Accelerator Test Facility (ATF2) at KEK, has been designed and optimised for nanometre-level beam position resolution. The BPMs are used to provide an input to a low-latency, intra-train beam position feedback system deployed in single-pass, multi-bunch mode with the aim of demonstrating intra-train beam stabilisation on electron bunches of charge ~1 nC separated in time by 280 ns. In 2016 the BPM resolution was demonstrated to be below 50 nm using the raw measured vertical positions at the three BPMs. New results will be presented utilising integrated sampling of the raw waveforms, improved BPM alignment and modified cavities to demonstrate a vertical position resolution on the order of 20 nm.
	Slides TUZGBD5 [8.557 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUZGBD5
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TUPML074	Resonant Excitation of Accelerating Field in Dielectric Corrugated Waveguide	1715
	A. Lyapin, S.T. Boogert, K. Lekomtsev JAI, Egham, Surrey, United Kingdom A. Aryshev KEK, Ibaraki, Japan A.A. Tishchenko MEPhI, Moscow, Russia
	Funding: This project has received funding from the European Union Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 655179. Beam driven dielectric wakefield accelerators (DWAs) [] typically operate in the terahertz frequency range, which pushes the plasma breakdown threshold for surface electric fields into the multi GV/m range. DWA technique allows one to accommodate a significant amount of charge per bunch, and opens access to conventional fabrication techniques for the accelerating structures. Resonant excitation of coherent Cherenkov radiation in DWA by a multi-bunch beam was used for selective resonant mode excitation [] and enhancement of accelerating wakefield []. We investigate the resonant excitation of Cherenkov Smith-Purcell radiation [*] in a corrugated cylindrical waveguide by a multi-bunch electron beam. The accelerating field is calculated using Particle in Cell simulations and some basic post-processing is done in order to estimate the possible enhancement of the accelerating field. The aim of this work is to investigate regimes of the resonant excitation that can potentially produce accelerating gradients above 1 GV/m. C. Jing, Rev. Acc. Phys. and Tech. 9, 127 (2016). G. Andonian, APL 98, 202901 (2011). * J.G. Power, PRSTAB 3, 101302 (2000). **** A.A. Ponomarenko, A.A. Tishchenko, NIMB 309, 223 (2013).
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUPML074
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Paper

Title

Page

Performance of Nanometre-Level Resolution Cavity Beam Position Monitors at ATF2

1212

T. Bromwich, D.R. Bett, N. Blaskovic Kraljevic, R.M. Bodenstein, P. Burrows, G.B. Christian, C. Perry, R.L. Ramjiawan
JAI, Oxford, United Kingdom
S. Araki, A. Aryshev, T. Tauchi, N. Terunuma
KEK, Ibaraki, Japan
P. Bambade, S. Wallon
LAL, Orsay, France
S.W. Jang
Korea University Sejong Campus, Sejong, Republic of Korea

A system of three low-Q cavity beam position monitors (BPMs), installed in the interaction point (IP) region of the Accelerator Test Facility (ATF2) at KEK, has been designed and optimised for nanometre-level beam position resolution. The BPMs are used to provide an input to a low-latency, intra-train beam position feedback system deployed in single-pass, multi-bunch mode with the aim of demonstrating intra-train beam stabilisation on electron bunches of charge ~1 nC separated in time by 280 ns. In 2016 the BPM resolution was demonstrated to be below 50 nm using the raw measured vertical positions at the three BPMs. New results will be presented utilising integrated sampling of the raw waveforms, improved BPM alignment and modified cavities to demonstrate a vertical position resolution on the order of 20 nm.

Slides TUZGBD5 [8.557 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUZGBD5

Export •

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

TUPML074

Resonant Excitation of Accelerating Field in Dielectric Corrugated Waveguide

1715

A. Lyapin, S.T. Boogert, K. Lekomtsev
JAI, Egham, Surrey, United Kingdom
A. Aryshev
KEK, Ibaraki, Japan
A.A. Tishchenko
MEPhI, Moscow, Russia

Funding: This project has received funding from the European Union Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant agreement No 655179.
Beam driven dielectric wakefield accelerators (DWAs) [*] typically operate in the terahertz frequency range, which pushes the plasma breakdown threshold for surface electric fields into the multi GV/m range. DWA technique allows one to accommodate a significant amount of charge per bunch, and opens access to conventional fabrication techniques for the accelerating structures. Resonant excitation of coherent Cherenkov radiation in DWA by a multi-bunch beam was used for selective resonant mode excitation [**] and enhancement of accelerating wakefield [***]. We investigate the resonant excitation of Cherenkov Smith-Purcell radiation [****] in a corrugated cylindrical waveguide by a multi-bunch electron beam. The accelerating field is calculated using Particle in Cell simulations and some basic post-processing is done in order to estimate the possible enhancement of the accelerating field. The aim of this work is to investigate regimes of the resonant excitation that can potentially produce accelerating gradients above 1 GV/m.
* C. Jing, Rev. Acc. Phys. and Tech. 9, 127 (2016).
** G. Andonian, APL 98, 202901 (2011).
*** J.G. Power, PRSTAB 3, 101302 (2000).
**** A.A. Ponomarenko, A.A. Tishchenko, NIMB 309, 223 (2013).

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-TUPML074

Export •

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