Dynamic focusing of a 3.8 MeV, 25 ps long, full width at half-maximum (FWHM), electron bunch by an overdense (n/sub p/[right angle bracket][right angle bracket]n/sub b/, where n/sub p/ and n/sub b/ are the plasma and bunch densities, respectively) plasma lens has been studied experimentally. The plasma focused the bunch from an initial transverse size of approximately 2.4 mm (FWHM) to about 0.5 mm, 21 cm downstream of the plasma. The sharp rise time (7 ps 10%-90%) of the electron bunch, excites a large-amplitude ([left angle bracket]1 MeV/m) plasma wave (plasma wake field). The peak focusing force of the lens is partly (60%) due to the beam-generated, azimuthal magnetic field and partly (40%) due to the radial component of the electrostatic wake field. (29 References). 343 Annual Meeting of the Division of Plasma Physics of the APS unavailable 3 144 Beam handling equipmentElectron beam focusingParticle beam dynamicsPlasma devicesPlasma focusPlasma wavesBeam handling, focusing, pulsing, stripping and diagnostics [A2925F], Plasma devices and applications [A5275], Particle beam production and handling, targets [A0777], Waves, oscillations, and instabilities in plasma [A5235]relativistic electron bunch, plasma lens, transverse dynamics, dynamic focusing, full width at half-maximum, rise time, large-amplitude plasma wave, plasma wake field, peak focusing force, beam-generated azimuthal magnetic field, radial component, electrostatic wake field, 3.8 MeV, 25 ps, 2.4 mm, 0.5 mm, 7 ps 36th Annual Meeting of the Division of Plasma Physics of the American Physical Society. Minneapolis, MN, USA. 7-11 Nov. 1994. Electron volt energy 3.8E+06 eV Time 2.5E-11 s Size 2.4E-03 m Size 5.0E-04 m Time 7.0E-12 s English Conference Paper 3 1995 Physics of Plasmas, vol. 2 228 2007-07-27T23:53:33-07:00 2555-61 1994