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 1 pi 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 +/- 0.1 pi 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 x 10(15) Am-1 rad(-1) makes it suitable for compact XUV FELs.
| Original language | English |
|---|---|
| Article number | 215007 |
| Number of pages | 4 |
| Journal | Physical Review Letters |
| Volume | 105 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - 19 Nov 2010 |
Keywords
- wakefield accelerator
- driven