Brunetti E, Shanks RP, Manahan GG, Islam MR, Ersfeld B, Anania MP, Cipiccia S, Issac RC, Raj G, Vieux G, Welsh GH, Wiggins SM, Jaroszynski DA. Low emittance, high brilliance relativistic electron beams from a laser-plasma accelerator.
Phys Rev Lett 2010;
105:215007. [PMID:
21231315 DOI:
10.1103/physrevlett.105.215007]
[Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Indexed: 05/30/2023]
Abstract
Progress in laser wakefield accelerators indicates their suitability as a driver of compact free-electron lasers (FELs). High brightness is defined by the normalized transverse emittance, which should be less than 1π mm mrad for an x-ray FEL. We report high-resolution measurements of the emittance of 125 MeV, monoenergetic beams from a wakefield accelerator. An emittance as low as 1.1±0.1π mm mrad is measured using a pepper-pot mask. This sets an upper limit on the emittance, which is comparable with conventional linear accelerators. A peak transverse brightness of 5×10¹⁵ A m⁻¹ rad⁻¹ makes it suitable for compact XUV FELs.
Collapse