Simulation of the autoresonance excitation of particles in a nested Penning trap. The energy gained injects particles into the adjacent well where another population of particles with opposite charge is located. more...

About the Group

Our research comprises theoretical investigations in a variety of critical problem areas related to advanced accelerator concepts, high gradient acceleration, and the basic equilibrium and stability properties of intense charged particle beams and laser-plasma systems.

Prof. Wurtele is also a Senior Faculty Scientist at the Center for Beam Physics in the Accelerator and Fusion Research Division of LBNL.

Group Members

Principal Investigator

Post Docs

An upper bound to time-averaged space-charge limited diode currents


The Child-Langmuir law limits the steady-state current density across a one-dimensional planar diode. While it is known that the peak current density can surpass this limit when the boundary conditions vary in time, it remains an open question of whether the average current can violate the Child?Langmuir limit under time-dependent conditions. For the case where the applied voltage is constant but the electric field at the cathode is allowed to vary in time, one-dimensional particle-in-cell simulations suggest that such a violation is impossible. Although a formal proof is not given, an upper bound on the time-averaged current density is offered.

Trapped antihydrogen


Antimatter was first predicted1 in 1931, by Dirac. Work with high-energy antiparticles is now commonplace, and anti-electrons are used regularly in the medical technique of positron emission tomography scanning. Antihydrogen, the bound state of an antiproton and a positron, has been produced2, 3 at low energies at CERN (the European Organization for Nuclear Research) since 2002. Antihydrogen is of interest for use in a precision test of nature?s fundamental symmetries. The charge conjugation/parity/time reversal (CPT) theorem, a crucial part of the foundation of the standard model of elementary particles and interactions, demands that hydrogen and antihydrogen have the same spectrum...


Contact Us

Jonathan S. Wurtele

Professor of Physics, and Faculty Scientist at the Lawrence Berkeley National Laboratory (LBNL)

441 Birge Hall
UC Berkeley
Berkeley, CA 94720
Phone: (510) 643-1575

1 Cyclotron Road MS 71B-287
Berkeley, CA 94720
Phone: (510) 486-6572
Fax: (510) 486-6485