Konstantin Kruchinin
Royal Holloway, University of London
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Publication
Featured researches published by Konstantin Kruchinin.
Physical Review Special Topics-accelerators and Beams | 2014
Laurence Nevay; S. Boogert; P. Karataev; Konstantin Kruchinin; L. Corner; D. F. Howell; R. Walczak; A. Aryshev; J. Urakawa; Nobuhiro Terunuma
A laserwire transverse electron beam size measurement system has been developed and operated at the Accelerator Test Facility 2 (ATF2) at KEK. Special electron beam optics were developed to create an approximately 1 x 100 {\mu}m (vertical x horizontal) electron beam at the laserwire location, which was profiled using a 150 mJ, 71 ps laser pulse with a wavelength of 532 nm. The precise characterisation of the laser propagation allows the non-Gaussian transverse profiles of the electron beam caused by the laser divergence to be deconvolved. A minimum vertical electron beam size of 1.07
Physical Review Special Topics-accelerators and Beams | 2015
T. Hofmann; Konstantin Kruchinin; Alessio Bosco; S. M. Gibson; Federico Roncarolo; G. Boorman; Uli Raich; E. Bravin; J. Pozimski; Alan Letchford; Christoph Gabor
{\pm}
Journal of Physics: Conference Series | 2014
Konstantin Kruchinin; A. Aryshev; P. Karataev; Benoit Bolzon; T. Lefevre; Stefano Mazzoni; M. Shevelev; S. Boogert; Laurence Nevay; Nobuhiro Terunuma; Junji Urakawa
0.06 (stat.)
Journal of Physics: Conference Series | 2016
V. V. Bleko; P. Karataev; A. S. Konkov; Konstantin Kruchinin; G. A. Naumenko; A. P. Potylitsyn; T Vaughan
{\pm}
7th Int. Particle Accelerator Conf. (IPAC'16), Busan, Korea, May 8-13, 2016 | 2016
Carsten Welsch; Michele Bergamaschi; R. Fiorito; P. Karataev; Robert Kieffer; Konstantin Kruchinin; T. Lefevre; Stefano Mazzoni; Joseph Wolfenden
0.05 (sys.) {\mu}m was measured. A vertically focussing quadrupole just before the laserwire was varied whilst making laserwire measurements and the projected vertical emittance was measured to be 82.56
Archive | 2014
S. M. Gibson; Alessio Bosco; P. Savage; Konstantin Kruchinin; Federico Roncarolo; Alan Letchford; G. Boorman; J. Pozimski; Christoph Gabor; T. Hofmann
{\pm}
Physical Review Special Topics-accelerators and Beams | 2015
Benoit Bolzon; M. Shevelev; Konstantin Kruchinin; Laurence Nevay; Nobuhiro Terunuma; Junji Urakawa; Thomas Aumeyr; P. Karataev; Carsten Welsch; T. Lefevre; A. Aryshev; Stefano Mazzoni; S. Boogert
3.04 pm rad.
Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms | 2017
R. Kieffer; E. Bravin; T. Lefevre; Stefano Mazzoni; M. Bergamaschi; P. Karataev; Konstantin Kruchinin; M. Billing; J. Conway; J. Shanks; Nobuhiro Terunuma; L. Bobb
A non-invasive, compact laserwire system has been developed to measure the transverse emittance of an H- beam and has been demonstrated at the new LINAC4 injector for the LHC at CERN. Light from a low power, pulsed laser source is conveyed via fibre to collide with the H- beam, a fraction of which is neutralized and then intercepted by a downstream diamond detector. Scanning the focused laser across the H- beam and measuring the distribution of the photo-neutralized particles enables the transverse emittance to be reconstructed. The vertical phase-space distribution of a 3 MeV beam during LINAC4 commissioning has been measured by the laserwire and verified with a conventional slit and grid method.
Nuclear Instruments & Methods in Physics Research Section A-accelerators Spectrometers Detectors and Associated Equipment | 2016
T. Hofmann; G. Boorman; Alessio Bosco; E. Bravin; S. M. Gibson; Konstantin Kruchinin; Uli Raich; Federico Roncarolo; Francesca Zocca
Optical transition radiation (OTR) arising when a relativistic charged particle crosses a boundary between two media with different optical properties is widely used as a tool for diagnostics of particle beams in modern accelerator facilities. The resolution of the beam profile monitors based on OTR depends on different effects of the optical system such as spherical and chromatic aberrations and diffraction. In this paper we present a systematic study of the different optical effects influencing the OTR beam profile monitor resolution. Obtained results have shown that such monitors can be used for sub-micrometer beam profile diagnostics. Further improvements and studies of the monitor are discussed.
Physical Review Special Topics-accelerators and Beams | 2015
Thomas Aumeyr; E. Bravin; Konstantin Kruchinin; Benoit Bolzon; Lorraine Bobb; Mg Billing; P. Karataev; T. Lefevre; Stefano Mazzoni
Diffraction and Cherenkov radiation of relativistic electrons from a dielectric target has been proposed as mechanism for production of intense terahertz (THz) radiation. The use of an extremely short high-energy electron beam of a 4th generation light source (X-ray free electron laser) appears to be very promising. A moderate power from the electron beam can be extracted and converted into THz radiation with nearly zero absorption losses. The initial experiment on THz observation will be performed at CLARA/VELA FEL test facility in the UK to demonstrate the principle to a wider community and to develop the radiator prototype. In this paper, we present our theoretical predictions (based on the approach of polarization currents), which provides the basis for interpreting the future experimental measurements. We will also present our hardware design and discuss a plan of the future experiment.