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

Lecturers and Postdocs

Graduate Students

An experimental limit on the charge of antihydrogen


The properties of antihydrogen are expected to be identical to those of hydrogen, and any differences would constitute a profound challenge to the fundamental theories of physics. The most commonly discussed antiatom-based tests of these theories are searches for antihydrogen-hydrogen spectral differences (tests of CPT (charge-parity-time) invariance) or gravitational differences (tests of the weak equivalence principle). Here we, the ALPHA Collaboration, report a different and somewhat unusual test of CPT and of quantum anomaly cancellation. A retrospective analysis of the influence of electric fields on antihydrogen atoms released from the ALPHA trap finds a mean axial deflection of 4.1±3.4 mm for an average axial electric field of 0.51 V mm

Antimatter Interferometry for Gravity Measurements


We describe a light-pulse atom interferometer that is suitable for any species of atom and even for electrons and protons as well as their antiparticles, in particular, for testing the Einstein equivalence principle with antihydrogen. The design obviates the need for resonant lasers through far-off resonant Bragg beam splitters and makes efficient use of scarce atoms by magnetic confinement and atom recycling. We expect to reach an initial accuracy of better than 1% for the acceleration of the free fall of antihydrogen, which can be improved to the part-per million level.


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