Zobrazeno 1 - 10
of 162
pro vyhledávání: '"G. Andonian"'
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 9, p 094601 (2023)
A single-shot method to reconstruct the transverse self-wakefields acting on a beam, based only on screen images, is introduced. By employing numerical optimization with certain approximations, a relatively high-dimensional parameter space is efficie
Externí odkaz:
https://doaj.org/article/0f4b4a17ec9144f9bfe112cbd1fa0b6f
Autor:
N. Majernik, G. Andonian, W. Lynn, S. Kim, C. Lorch, R. Roussel, S. Doran, E. Wisniewski, C. Whiteford, P. Piot, J. Power, J. B. Rosenzweig
Publikováno v:
Physical Review Accelerators and Beams, Vol 26, Iss 2, p 022801 (2023)
We report the development of a multileaf collimator (MLC) for charged particle beams, based on independently actuated tungsten strips that can selectively scatter unwanted particles. The MLC is used in conjunction with an emittance exchange beamline
Externí odkaz:
https://doaj.org/article/b881fc88e51d4f459ddf0cf3369bfc0f
Autor:
P. Scherkl, A. Knetsch, T. Heinemann, A. Sutherland, A. F. Habib, O. S. Karger, D. Ullmann, A. Beaton, G. G. Manahan, Y. Xi, A. Deng, M. D. Litos, B. D. O’Shea, S. Z. Green, C. I. Clarke, G. Andonian, R. Assmann, D. L. Bruhwiler, J. Smith, J. R. Cary, M. J. Hogan, V. Yakimenko, J. B. Rosenzweig, B. Hidding
Publikováno v:
Physical Review Accelerators and Beams, Vol 25, Iss 5, p 052803 (2022)
We present an ultracompact plasma-based method to measure spatial and temporal concurrence of intense electron and laser beams nonintrusively at their interaction point. The electron beam couples with a laser-generated seed plasma in dependence of sp
Externí odkaz:
https://doaj.org/article/8a606109a7764d7da329ada04ed92eb8
Autor:
N. Majernik, G. Andonian, O. B. Williams, B. D. O'Shea, P. D. Hoang, C. Clarke, M. J. Hogan, V. Yakimenko, J. B. Rosenzweig
Publikováno v:
Physical Review Research, Vol 4, Iss 2, p 023065 (2022)
Advanced acceleration methods based on wakefields generated by high-energy electron bunches passing through dielectric-based structures have demonstrated >GV/m fields, paving the first steps on a path to applications such as future compact linear col
Externí odkaz:
https://doaj.org/article/89913926f86f4cedb2d6095f90b6b8d2
Autor:
D. Ullmann, P. Scherkl, A. Knetsch, T. Heinemann, A. Sutherland, A. F. Habib, O. S. Karger, A. Beaton, G. G. Manahan, A. Deng, G. Andonian, M. D. Litos, B. D. O'Shea, J. R. Cary, M. J. Hogan, V. Yakimenko, J. B. Rosenzweig, B. Hidding
Publikováno v:
Physical Review Research, Vol 3, Iss 4, p 043163 (2021)
The properties of electron beams obtainable from plasma wakefield accelerators are largely determined by their injection into the plasma wave. Density downramps can facilitate injection of plasma electrons and are realized routinely in laser wakefiel
Externí odkaz:
https://doaj.org/article/a62faaed037943aabc7c546ffcb03547
Publikováno v:
Physical Review Accelerators and Beams, Vol 23, Iss 12, p 121303 (2020)
Present-day and next-generation accelerators, particularly for applications in driving wakefield-based schemes, require longitudinal beam shaping and attendant longitudinal characterization for experimental optimization. Here we present a diagnostic
Externí odkaz:
https://doaj.org/article/6a93b4f9d8334c38b1d45198507d7bfb
Autor:
B. D. O’Shea, G. Andonian, S. K. Barber, K. L. Fitzmorris, S. Hakimi, J. Harrison, P. D. Hoang, M. J. Hogan, B. Naranjo, O. B. Williams, V. Yakimenko, J. B. Rosenzweig
Publikováno v:
Nature Communications, Vol 7, Iss 1, Pp 1-7 (2016)
Wakefield accelerators are a cheaper and compact alternative to conventional particle accelerators for high-energy physics and coherent x-ray sources. Here, the authors demonstrate a field gradient in excess of a gigaelectron-volt-per-metre using a t
Externí odkaz:
https://doaj.org/article/dec7282795fa490892292781e821d048
Publikováno v:
Physical Review Accelerators and Beams, Vol 21, Iss 12, p 121302 (2018)
The suppression of transverse wakefield effects using transversely elliptical drive beams in a planar structure is studied with a simple analytical model that unveils the geometric nature of this phenomenon. By analyzing the suggested model we derive
Externí odkaz:
https://doaj.org/article/740348af32784b23944541885eb7f288
Autor:
G. G. Manahan, A. Deng, O. Karger, Y. Xi, A. Knetsch, M. Litos, G. Wittig, T. Heinemann, J. Smith, Z. M. Sheng, D. A. Jaroszynski, G. Andonian, D. L. Bruhwiler, J. B. Rosenzweig, B. Hidding
Publikováno v:
Physical Review Accelerators and Beams, Vol 19, Iss 1, p 011303 (2016)
Dark current can spoil witness bunch beam quality and acceleration efficiency in particle beam-driven plasma wakefield accelerators. In advanced schemes, hot spots generated by the drive beam or the wakefield can release electrons from higher ionizat
Externí odkaz:
https://doaj.org/article/4e7614bd55cb4915a8a7447ef0641bf2
Publikováno v:
Physical Review Special Topics. Accelerators and Beams, Vol 18, Iss 3, p 032802 (2015)
In this paper, we discuss the velocity compression in a short rf linac of an electron bunch from a rf photoinjector operated in the blowout regime. Particle tracking simulations shows that with a beam charge of 2 pC an ultrashort bunch duration of 16
Externí odkaz:
https://doaj.org/article/0406499971524c01aff237de24ce5c13