James Rosenzweig

Accelerator & Beam Dynamics

Office: 3-174D Knudsen
Phone: (310) 206-4541
email

Educational Background:

• Ph.D., University of Wisconsin - Madison, 1988

Research Interests:

Prof. Rosenzweig is engaged in experimental and theoretical investigations of particle beam physics. He is particulary active in the area of ultra-high brightness electron beam generation, a hybrid field drawing from beam physics, plasma physics, and an assortment of intricate technologies. The generation, violent acceleration, and diagnosis of these beams, which consist of essentially picosecond-long pulses of ultra-relativistic single component plasma, enables research in a host of other subjects of interest.

The subjects underactive investigation in Prof. Rosenzweig's group include free-electron lasers, plasma wake-field acceleration, plasma lensing, advanced microwave devices, and optical acceleration. While some research is conducted at at collaborating laboratories, such as Brookhaven, SLAC, Livermore, Fermilab, and INFN-Milano, most of the group's efforts are centered at two on-campus laboratories. The UCLA facilities consist of the Neptune laboratory, a state-of-the-art advanced accelerator laboratory run jointly with Prof. Chan Joshi of EE, and the newly commissioned PEGASUS laboratory, which is dedicated to the study of free-electron lasers and related physics.

For much more information on Prof. Rosenzweigs program, see the Particle Beam Physics Laboratory website.

Prof. Rosenzweig has developed a course on modern approaches to particle beam physics, Physics 150, which is traditionally taught in the winter quarter yearly. He has written a text book for the course which is scheduled for publication in 2000.

Selected Recent Publications:

1. Observation of plasma wakefield acceleration in the underdense regime, N. Barov, J. B. Rosenzweig, M. E. Conde, W. Gai, and J. G. Power, Phys. Rev. ST Accel. Beams 3, 011301 (2000)
2. Observation of Self-Amplified Spontaneous Emission-induced Electron Beam Microbunching using Coherent Transition Radiation, A. Tremaine, J. B. Rosenzweig, et al., Physical Review Lettters 81, 5816 (1998).
3. Propagation of Short Electron Pulses in a Self-formed Ion Channel, N. Barov, M.E.Conde, W. Gai, and J.B. Rosenzweig, Physical Review Lettters 80, 81 (1998).
4. Measurements of Gain Larger Than 10^5 in a 12 micron SASE FEL, M. Hogan, et al., Physical Review Lettters 81, 4867 (1998).
5. The Neptune Photoinjector, J.B. Rosenzweig et al, Nuclear Instr. and Methods A 410, 437 (1998).
6. Bunch Length Measurements of Picosecond Electron Beam from a Photoinjector Using Coherent Transition Radiation, A. Murokh, J.B. Rosenzweig et al, Nuclear Instr. and Methods A 410, 549 (1998).
7. Diamagnetic Fields Due to Finite Dimension Intense Beams in High-Gain Free-electron Lasers, J.B. Rosenzweig and P. Musumeci, Physical Review E - Rapid Communications 58, R2737 (1998).
8. Experimental confirmation of transverse focusing and adiabatic damping in a standing wave linear accelerator S. Reiche, J. B. Rosenzweig, et al., Physical Review E 56, 3572 (1997).
9. Envelope analysis of intense relativistic quasilaminar beams in rf photoinjectors: A theory of emittance compensation, Luca Serafini and James B. Rosenzweig, Physical Review E 55, 7565 (1997).
10. A Proposed Dielectric-loaded Resonant Laser Accelerator, J.B. Rosenzweig, A. Murokh, and C. Pellegrini, Phys. Rev. Letters 74, 2467 (1995).