FEL2017 - List of Authors (Power, J.G.)

Paper	Title	Page
TUP015	Coherent Transition Radiation from Transversely Modulated Electron Beams	276
	A. Halavanau, P. Piot Northern Illinois University, DeKalb, Illinois, USA S.P. Antipov, W. Liu, N.R. Neveu, J.G. Power, C. Whiteford, E.E. Wisniewski ANL, Argonne, Illinois, USA A.I. Benediktovitch BSU, Minsk, Belarus, Belarus S.N. Galyamin, A.V. Tyukhtin Saint Petersburg State University, Saint Petersburg, Russia D. Mihalcea, P. Piot Fermilab, Batavia, Illinois, USA N.R. Neveu IIT, Chicago, Illinois, USA
	A transverse laser-shaping optical setup using microlens arrays (MLAs), previously developed and employed at Argonne Wakefield Accelerator (AWA), allows the formation of both highly uniform and modulated (patterned) beams. In the latter case, transverse modulation is imposed in the sub-millimeter scale. In the present study, we report the simulations of backward coherent transition radiation (CTR) emitted from a transversely modulated beam. We compare the case of a uniform round beam against different transverse modulation wavelengths by generating CTR on a steel target and measuring the autocorrelation function of the resulting radiation with an interferometer. We particularly focus on the differences between round and patterned beam distributions and discuss possible future applications of this setup in THz radiation generation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2017-TUP015
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TUP054	Preparations for Installation of the Double Emittance-Exchange Beamline at the Argonne Wakefield Accelerator Facility	340
	G. Ha PAL, Pohang, Republic of Korea M.E. Conde, D.S. Doran, W. Gai, J.G. Power ANL, Argonne, Illinois, USA
	Funding: This work is supported by Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. Preparations to upgrade the single EEX beamline at the Argonne Wakefield Accelerator (AWA) facility to a double EEX beamline are underway. The single EEX beamline recently demonstrated exchange-based longitudinal bunch shaping (LBS) which has numerous applications including high-energy physics linear colliders, x-ray FELs, and intense radiation sources. The exchange-based method can generate arbitrary LBS in the ideal case but has limitations in the real case. The double EEX beamline was proposed as a means to overcome the limitations of single EEX due to transverse jitter and large horizontal emittance. In this paper, we present the current status of beamline design and installation and simulation results for the planned experiments: collinear wakefield acceleration with tailored beams and tunable bunch compression without the double-horn feature.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2017-TUP054
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Coherent Transition Radiation from Transversely Modulated Electron Beams

276

A. Halavanau, P. Piot
Northern Illinois University, DeKalb, Illinois, USA
S.P. Antipov, W. Liu, N.R. Neveu, J.G. Power, C. Whiteford, E.E. Wisniewski
ANL, Argonne, Illinois, USA
A.I. Benediktovitch
BSU, Minsk, Belarus, Belarus
S.N. Galyamin, A.V. Tyukhtin
Saint Petersburg State University, Saint Petersburg, Russia
D. Mihalcea, P. Piot
Fermilab, Batavia, Illinois, USA
N.R. Neveu
IIT, Chicago, Illinois, USA

A transverse laser-shaping optical setup using microlens arrays (MLAs), previously developed and employed at Argonne Wakefield Accelerator (AWA), allows the formation of both highly uniform and modulated (patterned) beams. In the latter case, transverse modulation is imposed in the sub-millimeter scale. In the present study, we report the simulations of backward coherent transition radiation (CTR) emitted from a transversely modulated beam. We compare the case of a uniform round beam against different transverse modulation wavelengths by generating CTR on a steel target and measuring the autocorrelation function of the resulting radiation with an interferometer. We particularly focus on the differences between round and patterned beam distributions and discuss possible future applications of this setup in THz radiation generation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2017-TUP015

Export •

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

TUP054

Preparations for Installation of the Double Emittance-Exchange Beamline at the Argonne Wakefield Accelerator Facility

340

G. Ha
PAL, Pohang, Republic of Korea
M.E. Conde, D.S. Doran, W. Gai, J.G. Power
ANL, Argonne, Illinois, USA

Funding: This work is supported by Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
Preparations to upgrade the single EEX beamline at the Argonne Wakefield Accelerator (AWA) facility to a double EEX beamline are underway. The single EEX beamline recently demonstrated exchange-based longitudinal bunch shaping (LBS) which has numerous applications including high-energy physics linear colliders, x-ray FELs, and intense radiation sources. The exchange-based method can generate arbitrary LBS in the ideal case but has limitations in the real case. The double EEX beamline was proposed as a means to overcome the limitations of single EEX due to transverse jitter and large horizontal emittance. In this paper, we present the current status of beamline design and installation and simulation results for the planned experiments: collinear wakefield acceleration with tailored beams and tunable bunch compression without the double-horn feature.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-FEL2017-TUP054

Export •

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