Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator

G. H. Welsh, M. P. Anania, C. Aniculaesei, E. Brunetti, R. T. L. Burgess, S. Cipiccia, D. Clark, B. Ersfeld, M. R. Islam, R. C. Issac, G. G. Manahan, T. McCanny, G. Raj, A. J. W. Reitsma, R. P. Shanks, G. Vieux, S. M. Wiggins, D. A. Jaroszynski, W. Allan Gillespie, Allan M. MacLeod & 2 others S. B. van der Geer, M. J. de Loos

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The Advanced Laser-Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser-plasma wakefield accelerators to produce high energy, ultra-short duration electron bunches as drivers of radiation sources. Coherent emission will be produced in a free-electron laser by focussing the ultra-short electron bunches into an undulator. To achieve net gain, high peak current, low energy spread and low emittance are required. A high intensity, ultra-short pulse from a 30 TW Ti:sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 80 - 200 MeV. Beam transport is monitored using a series of Lanex screens positioned along the beam line. Measurements of the electron energy spectrum, obtained using the ALPHA-X high resolution magnetic dipole spectrometer, are presented. The maximum central energy of the monoenergetic beam is 90 MeV and r.m.s. relative energy spreads as low as 0.8% are measured. The mean central energy is 82 ± 4 MeV and mean energy spread is 1.1 ± 0.4%. We also present pepper-pot measurements of the normalised transverse emittance where mono-energetic electrons are passed through an array of 52µm diameter holes in tungsten. The analysis of the pepper-pot results sets an upper limit for the normalised emittance at 5.5 ± 1π mm mrad for an 82 MeV beam. With further acceleration to 1 GeV, the relative energy spread will reduce giving beam parameters that indicate the feasibility of a compact X-ray FEL driven by a plasma-wakefield accelerator.
Original languageEnglish
Title of host publicationProceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010
Pages1146-1148
Number of pages3
StatePublished - Jun 2010
Event1st International Particle Accelerator Conference - Kyoto, Japan

Conference

Conference1st International Particle Accelerator Conference
Abbreviated titleIPAC'10
CountryJapan
CityKyoto
Period23/05/1028/05/10

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energy
laser plasmas
electrons
plasma accelerators
emittance
accelerators
peppers
gas jets
low currents
high gain
radiation sources
magnetic dipoles
free electron lasers
tungsten
sapphire
energy spectra
helium
electron beams
spectrometers
electron energy

Cite this

Welsh, G. H., Anania, M. P., Aniculaesei, C., Brunetti, E., Burgess, R. T. L., Cipiccia, S., ... de Loos, M. J. (2010). Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator. In Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010 (pp. 1146-1148). [MOPE072]

Welsh, G. H.; Anania, M. P.; Aniculaesei, C.; Brunetti, E.; Burgess, R. T. L.; Cipiccia, S.; Clark, D.; Ersfeld, B.; Islam, M. R.; Issac, R. C.; Manahan, G. G.; McCanny, T.; Raj, G.; Reitsma, A. J. W.; Shanks, R. P.; Vieux, G.; Wiggins, S. M.; Jaroszynski, D. A.; Gillespie, W. Allan; MacLeod, Allan M.; van der Geer, S. B.; de Loos, M. J. / Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator.

Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010. 2010. p. 1146-1148 MOPE072.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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abstract = "The Advanced Laser-Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser-plasma wakefield accelerators to produce high energy, ultra-short duration electron bunches as drivers of radiation sources. Coherent emission will be produced in a free-electron laser by focussing the ultra-short electron bunches into an undulator. To achieve net gain, high peak current, low energy spread and low emittance are required. A high intensity, ultra-short pulse from a 30 TW Ti:sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 80 - 200 MeV. Beam transport is monitored using a series of Lanex screens positioned along the beam line. Measurements of the electron energy spectrum, obtained using the ALPHA-X high resolution magnetic dipole spectrometer, are presented. The maximum central energy of the monoenergetic beam is 90 MeV and r.m.s. relative energy spreads as low as 0.8% are measured. The mean central energy is 82 ± 4 MeV and mean energy spread is 1.1 ± 0.4%. We also present pepper-pot measurements of the normalised transverse emittance where mono-energetic electrons are passed through an array of 52µm diameter holes in tungsten. The analysis of the pepper-pot results sets an upper limit for the normalised emittance at 5.5 ± 1π mm mrad for an 82 MeV beam. With further acceleration to 1 GeV, the relative energy spread will reduce giving beam parameters that indicate the feasibility of a compact X-ray FEL driven by a plasma-wakefield accelerator.",
author = "Welsh, {G. H.} and Anania, {M. P.} and C. Aniculaesei and E. Brunetti and Burgess, {R. T. L.} and S. Cipiccia and D. Clark and B. Ersfeld and Islam, {M. R.} and Issac, {R. C.} and Manahan, {G. G.} and T. McCanny and G. Raj and Reitsma, {A. J. W.} and Shanks, {R. P.} and G. Vieux and Wiggins, {S. M.} and Jaroszynski, {D. A.} and Gillespie, {W. Allan} and MacLeod, {Allan M.} and {van der Geer}, {S. B.} and {de Loos}, {M. J.}",
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isbn = "9789290833529",
pages = "1146--1148",
booktitle = "Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010",

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Welsh, GH, Anania, MP, Aniculaesei, C, Brunetti, E, Burgess, RTL, Cipiccia, S, Clark, D, Ersfeld, B, Islam, MR, Issac, RC, Manahan, GG, McCanny, T, Raj, G, Reitsma, AJW, Shanks, RP, Vieux, G, Wiggins, SM, Jaroszynski, DA, Gillespie, WA, MacLeod, AM, van der Geer, SB & de Loos, MJ 2010, Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator. in Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010., MOPE072, pp. 1146-1148, 1st International Particle Accelerator Conference, Kyoto, Japan, 23-28 May.

Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator. / Welsh, G. H.; Anania, M. P.; Aniculaesei, C.; Brunetti, E.; Burgess, R. T. L.; Cipiccia, S.; Clark, D.; Ersfeld, B.; Islam, M. R.; Issac, R. C.; Manahan, G. G.; McCanny, T.; Raj, G.; Reitsma, A. J. W.; Shanks, R. P.; Vieux, G.; Wiggins, S. M.; Jaroszynski, D. A.; Gillespie, W. Allan; MacLeod, Allan M.; van der Geer, S. B.; de Loos, M. J.

Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010. 2010. p. 1146-1148 MOPE072.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - CHAP

T1 - Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator

AU - Welsh,G. H.

AU - Anania,M. P.

AU - Aniculaesei,C.

AU - Brunetti,E.

AU - Burgess,R. T. L.

AU - Cipiccia,S.

AU - Clark,D.

AU - Ersfeld,B.

AU - Islam,M. R.

AU - Issac,R. C.

AU - Manahan,G. G.

AU - McCanny,T.

AU - Raj,G.

AU - Reitsma,A. J. W.

AU - Shanks,R. P.

AU - Vieux,G.

AU - Wiggins,S. M.

AU - Jaroszynski,D. A.

AU - Gillespie,W. Allan

AU - MacLeod,Allan M.

AU - van der Geer,S. B.

AU - de Loos,M. J.

PY - 2010/6

Y1 - 2010/6

N2 - The Advanced Laser-Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser-plasma wakefield accelerators to produce high energy, ultra-short duration electron bunches as drivers of radiation sources. Coherent emission will be produced in a free-electron laser by focussing the ultra-short electron bunches into an undulator. To achieve net gain, high peak current, low energy spread and low emittance are required. A high intensity, ultra-short pulse from a 30 TW Ti:sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 80 - 200 MeV. Beam transport is monitored using a series of Lanex screens positioned along the beam line. Measurements of the electron energy spectrum, obtained using the ALPHA-X high resolution magnetic dipole spectrometer, are presented. The maximum central energy of the monoenergetic beam is 90 MeV and r.m.s. relative energy spreads as low as 0.8% are measured. The mean central energy is 82 ± 4 MeV and mean energy spread is 1.1 ± 0.4%. We also present pepper-pot measurements of the normalised transverse emittance where mono-energetic electrons are passed through an array of 52µm diameter holes in tungsten. The analysis of the pepper-pot results sets an upper limit for the normalised emittance at 5.5 ± 1π mm mrad for an 82 MeV beam. With further acceleration to 1 GeV, the relative energy spread will reduce giving beam parameters that indicate the feasibility of a compact X-ray FEL driven by a plasma-wakefield accelerator.

AB - The Advanced Laser-Plasma High-Energy Accelerators towards X-rays (ALPHA-X) programme at the University of Strathclyde is developing laser-plasma wakefield accelerators to produce high energy, ultra-short duration electron bunches as drivers of radiation sources. Coherent emission will be produced in a free-electron laser by focussing the ultra-short electron bunches into an undulator. To achieve net gain, high peak current, low energy spread and low emittance are required. A high intensity, ultra-short pulse from a 30 TW Ti:sapphire laser is focussed into a helium gas jet to produce femtosecond duration electron bunches in the range of 80 - 200 MeV. Beam transport is monitored using a series of Lanex screens positioned along the beam line. Measurements of the electron energy spectrum, obtained using the ALPHA-X high resolution magnetic dipole spectrometer, are presented. The maximum central energy of the monoenergetic beam is 90 MeV and r.m.s. relative energy spreads as low as 0.8% are measured. The mean central energy is 82 ± 4 MeV and mean energy spread is 1.1 ± 0.4%. We also present pepper-pot measurements of the normalised transverse emittance where mono-energetic electrons are passed through an array of 52µm diameter holes in tungsten. The analysis of the pepper-pot results sets an upper limit for the normalised emittance at 5.5 ± 1π mm mrad for an 82 MeV beam. With further acceleration to 1 GeV, the relative energy spread will reduce giving beam parameters that indicate the feasibility of a compact X-ray FEL driven by a plasma-wakefield accelerator.

M3 - Conference contribution

SN - 9789290833529

SP - 1146

EP - 1148

BT - Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010

ER -

Welsh GH, Anania MP, Aniculaesei C, Brunetti E, Burgess RTL, Cipiccia S et al. Electron beam quality measurements on the ALPHA-X laser-plasma wakefield accelerator. In Proceedings of the first International Particle Accelerator Conference (IPAC’10), Kyoto, 23-28 May 2010. 2010. p. 1146-1148. MOPE072.