GABRIELSE RESEARCH GROUP

Professor Gerald Gabrielse

Harvard Physics Department

People

Opportunities for Graduate Students and Postdocs

Trivia: Angels and Demons

Publications

Now Accepting Postdoc Applications
(as of 15 June 2009)

Trivia: Hapgood

Printable Narrative on Group Research

Trivia: Jim Carey and Conan O'Brien

Current Research Projects (overview)

Lepton Magnetic Moments*	S. Fogwell, J. Dorr, G. Gabrielse (many earlier contributions)
Most accurate measurement of the electron magnetic moment (AIP Physics story of the year, etc.) Most accurate determination of the fine structure constant Most stringent test of quantum electrodynamics theory Limit on electron substructure Most stringent test of CPT invariance with leptons Latest apparatus and progress
ATRAP Antihydrogen Studies^,*	Dr. J. Wrubel, P. Larochelle, R. McConnell, S. Kolthammer, P. Richerme, G. Gabrielse and collaborators
Nested Penning Trap (proposed, first demonstration with protons and electrons, first filling with positrons and electrons) First positron cooling of antiprotons (first method for making antihdyrogen) Our first observation of slow antihydrogen atoms (followed immediately by an improved method) Slow antihydrogen observations are the AIP Physics Story of the Year Antihydrogen velocity and an interpretation Laser-controlled antihydrogen production (second method to make antihydrogen) Antiproton confinement within a Penning-Ioffe trap First antihydrogen production within a Penning-Ioffe trap
Proton and Antiproton Magnetic Moments^,*	N. Guise, J. DiSciacca, G. Gabrielse

Why Does Sideband Mass Spectroscopy Work? (recent PRL and longer report)	G. Gabrielse

Investigation of a One-Electron Qubit	J. Goldman, P. Hess, G. Gabrielse

ACME Search for the Electric Dipole Moment of an Electron	Y. Gurevich, B. Spaun, G. Gabrielse (and collaborators from the DeMille and Doyle groups)

*supported by the AMO program of the US NSF

**supported by the US AFOSR

Also of Interest (overview)

Most Accurate CPT Test with Baryons - Comparing Q/M of the Antiproton and Proton (overview, 100 ppt, 1 ppb, 40 ppb)

Methods to Produce the World's Coldest Antiproton (by 10,000,000,000 in Energy)
as Needed to Produce Cold Antihydrogen (overview, review)

First capture of antiprotons in a Penning trap

First electron-cooling of trapped antiprotons

Stacking antiprotons

Brown-Gabrielse Invariance Theorem Enables Many of the Most Accurate Measurements
in Particle, Nuclear and Atomic Physics (derivation, application to nuclear mass measurements, review of its use)

Theory of One Particle in a Penning Trap

New Designs for Penning Traps

Orthogonalized hyperbolic Penning traps (overview, design, damping)

Cylindrical Penning traps (overview, design, demonstration with one electron)

Open-access cylindrical traps (overview, design)

Planar Penning traps (overview)

Superconducting Solenoid that Shields Magnetic Field Fluctuations (design, patent, demonstration)