Abstract
The observation of plasma focusing of a 28.5 GeV positron beam is reported. The plasma was formed by ionizing a nitrogen jet only 3 mm thick. Simultaneous focusing in both transverse dimensions was observed with effective focusing strengths of order tesla per micron. The minimum area of the beam spot was reduced by a factor of by the plasma. The longitudinal beam envelope was measured and compared with numerical calculations.
- Received 21 September 2001
DOI:https://doi.org/10.1103/PhysRevLett.87.244801
©2001 American Physical Society