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Abstract
The normalised transverse emittance is a measure of the quality of an electron beam from a particle accelerator. The brightness, parallelism and focusability are all functions of the emittance. Here we present a high-resolution single shot method of measuring the transverse emittance of a 125 +/- 3 MeV electron beam generated from a laser wakefield accelerator (LWFA) using a pepper-pot mask. An average normalised emittance of epsilon(rms,x,y) = 2.2 +/- 0.7, 2.3 +/- 0.6 pi-mm-mrad was measured, which is comparable to that of a conventional linear accelerator. The best measured emittance was epsilon(rms,x),= 1.1 +/- 0.1 pi-mm-mrad, corresponding to the resolution limit of our system. The low emittance indicates that this accelerator is suitable for driving a compact free electron laser.
Original language | English |
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Title of host publication | Laser acceleration of electrons, protons, and ions and medical applications of laser-generated secondary sources of radiation and particles |
Editors | W.P. Leemans, E. Esarey, S.M. Hooker, K.W.D. Ledingham, K. Spohr, P. McKenna |
Place of Publication | Bellingham |
DOIs | |
Publication status | Published - 2011 |
Event | Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles - Prague, Czech Republic Duration: 18 Apr 2011 → 20 Apr 2011 |
Publication series
Name | Proceedings of SPIE |
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Publisher | SPIE |
Volume | 8079 |
ISSN (Print) | 0277-786X |
Conference
Conference | Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles |
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Country/Territory | Czech Republic |
City | Prague |
Period | 18/04/11 → 20/04/11 |
Keywords
- high resolution
- single shot emittance measurement
- relativistic electrons
- laser-driven accelerator
- emittance
- pepper-pot mask
- laser wakefield acceleration
- beams
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- 3 Finished
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Extreme light infrastructure (ELI)
STFC Science and Technology Facilities Council
1/04/08 → 31/03/11
Project: Research