NAPAC2016 - List of Authors (Sahai, A. A.)

Paper	Title	Page
TUA3CO03	Compact Ring-Based X-Ray Source With on-Orbit and on-Energy Laser-Plasma Injection	435
	M. Turner CERN, Geneva, Switzerland J.R. Cheatam, A.L. Edelen CSU, Fort Collins, Colorado, USA J. Gerity Texas A&M University, College Station, USA A. Lajoie, C.Y. Wong NSCL, East Lansing, Michigan, USA G. Lawler UCLA, Los Angeles, California, USA O. Lishilin DESY Zeuthen, Zeuthen, Germany K. Moon UNIST, Ulsan, Republic of Korea A. A. Sahai, A. Seryi JAI, Oxford, United Kingdom K. Shih SBU, Stony Brook, New York, USA B. Zerbe MSU, East Lansing, Michigan, USA
	Funding: We acknowledge the stimulating atmosphere and support of US Particle Accelerator School, class of June 2016, where this design study was performed. We report here the results of a one week long investigation into the conceptual design of an X-ray source based on a compact ring with on-orbit and on-energy laser-plasma accelerator (mini-project 10.4 from [1]). We performed these studies during the June 2016 USPAS class "Physics of Accelerators, Lasers, and Plasma…" applying the art of inventiveness TRIZ. We describe three versions of the light source with the constraints of the electron beam with energy 1 GeV or 3 GeV and a magnetic lattice design being normal conducting (only for the 1 GeV beam) or superconducting (for either beam). The electron beam recirculates in the ring, to increase the effective photon flux. We describe the design choices, present relevant parameters, and describe insights into such machines. [1] Unifying physics of accelerators, lasers and plasma, A. Seryi, CRC Press, 2015.
	Slides TUA3CO03 [8.411 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA3CO03
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WEPOA10	Crunch-in Regime - Non-linearly driven hollow-channel plasma
	A. A. Sahai JAI, London, United Kingdom
	Funding: John Adams Institute for Accelerator Sciences, Oxford University, Oxford, UK & Department of Physics, Imperial College London, London, UK Plasma wakefields driven inside a hollow-channel plasma are significantly different from those driven in a homogeneous plasma. We investigate the scaling laws of the accelerating and focusing fields in the novel ''crunch-in'' regime [1] [2]. This regime is excited due to the collapse of the electron-rings from the channel walls onto the propagation axis of the energy-source in its wake. This regime is thus the non-linearly driven hollow channel, since the electron-ring displacement is of the order of the channel radius [3]. We present the properties of the coherent structures in the ''crunch-in'' regime where the channel radius is matched to the beam properties such that channel-edge to on-axis collapse time has a direct correspondence to the energy source intensity. We also investigate the physical mechanisms that underlie the ''crunch-in'' wakefields by tuning the channel radius. Using a theoretical framework and results from PIC simulations the possible applications of the ''crunch-in'' regime for acceleration of positron beams with collider-scale parameters is presented. 1. A Sahai, PhD ths-http://dukespace.lib.duke.edu/dspace/handle/10161/10534 2. Proc IPAC2015/WEPJE001-http://accelconf.web.cern.ch/AccelConf/IPAC2015/papers/wepje001.pdf 3. Ion-wake-arXiv:1504.03735
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Paper

Title

Page

Compact Ring-Based X-Ray Source With on-Orbit and on-Energy Laser-Plasma Injection

435

M. Turner
CERN, Geneva, Switzerland
J.R. Cheatam, A.L. Edelen
CSU, Fort Collins, Colorado, USA
J. Gerity
Texas A&M University, College Station, USA
A. Lajoie, C.Y. Wong
NSCL, East Lansing, Michigan, USA
G. Lawler
UCLA, Los Angeles, California, USA
O. Lishilin
DESY Zeuthen, Zeuthen, Germany
K. Moon
UNIST, Ulsan, Republic of Korea
A. A. Sahai, A. Seryi
JAI, Oxford, United Kingdom
K. Shih
SBU, Stony Brook, New York, USA
B. Zerbe
MSU, East Lansing, Michigan, USA

Funding: We acknowledge the stimulating atmosphere and support of US Particle Accelerator School, class of June 2016, where this design study was performed.
We report here the results of a one week long investigation into the conceptual design of an X-ray source based on a compact ring with on-orbit and on-energy laser-plasma accelerator (mini-project 10.4 from [1]). We performed these studies during the June 2016 USPAS class "Physics of Accelerators, Lasers, and Plasma…" applying the art of inventiveness TRIZ. We describe three versions of the light source with the constraints of the electron beam with energy 1 GeV or 3 GeV and a magnetic lattice design being normal conducting (only for the 1 GeV beam) or superconducting (for either beam). The electron beam recirculates in the ring, to increase the effective photon flux. We describe the design choices, present relevant parameters, and describe insights into such machines.
[1] Unifying physics of accelerators, lasers and plasma, A. Seryi, CRC Press, 2015.

Slides TUA3CO03 [8.411 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-TUA3CO03

Export •

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

WEPOA10

Crunch-in Regime - Non-linearly driven hollow-channel plasma

A. A. Sahai
JAI, London, United Kingdom

Funding: John Adams Institute for Accelerator Sciences, Oxford University, Oxford, UK & Department of Physics, Imperial College London, London, UK
Plasma wakefields driven inside a hollow-channel plasma are significantly different from those driven in a homogeneous plasma. We investigate the scaling laws of the accelerating and focusing fields in the novel ''crunch-in'' regime [1] [2]. This regime is excited due to the collapse of the electron-rings from the channel walls onto the propagation axis of the energy-source in its wake. This regime is thus the non-linearly driven hollow channel, since the electron-ring displacement is of the order of the channel radius [3]. We present the properties of the coherent structures in the ''crunch-in'' regime where the channel radius is matched to the beam properties such that channel-edge to on-axis collapse time has a direct correspondence to the energy source intensity. We also investigate the physical mechanisms that underlie the ''crunch-in'' wakefields by tuning the channel radius. Using a theoretical framework and results from PIC simulations the possible applications of the ''crunch-in'' regime for acceleration of positron beams with collider-scale parameters is presented.
1. A Sahai, PhD ths-http://dukespace.lib.duke.edu/dspace/handle/10161/10534
2. Proc IPAC2015/WEPJE001-http://accelconf.web.cern.ch/AccelConf/IPAC2015/papers/wepje001.pdf
3. Ion-wake-arXiv:1504.03735

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