2001/10/04 by J. S. T. Ng, J.S.T. Ng, Pisin Chen +26 · 2 citations
Engineering · Physics and Astronomy · #Ion-surface interactions and analysis #Laser-Plasma Interactions and Diagnostics #Particle accelerators and beam dynamics #physics.acc-ph
paper · pdf · doi:10.1103/physrevlett.87.244801
published as Phys.Rev.Lett. 87 (2001) 244801
arxiv created 2001/10/04 · openalex publication_date 2001/11/19 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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 2.0+/-0.3 by the plasma. The longitudinal beam envelope was measured and compared with numerical calculations.