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Harvey Gould's Electron Electric Dipole Moment (e-EDM) Experiment Web Page Contact: HAGould at LBL dot gov or through the LBNL directory. |
| MENU | EDM Basics and New Physics | eEDM Experiments | Cs Fountain eEDM Experiment | New Collaboration eEDM Experiment |
| What's New | Four eEDM Experiments | |
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A proof-of-principle experiment was recently
completed (Amini,
Munger, & Gould 2007, link
to journal) and my colleagues and I are now developing a full scale experiment. Also leading up to the eEDM experiment is a series of Cs fountain experiments including: "Focusing a fountain of neutral cesium atoms with an electrostatic lens triplet" (Kalnins, Amini & Gould, 2005; link to journal), "High precision measurement of the Static Dipole Polarizability of Cesium (Amini & Gould 2003, link to journal), and "Slowing and cooling molecules and neutral atoms by time-varying electric field gradients (Maddi [aka Amini], Dinneen &Gould 2000, link to journal) note: the conservative force only "cools" by a phase space rotation: there is no increase in phase space density as there is with laser cooling.. In 1987 Eugene Commins and I started a thermal atomic Tl beam experiment that, published in 1990 (Abdullah et al., 1990; link to journal), set a new eEDM upper limit. I left the collaboration in 1992. I started my eEDM work on a cesium-sodium comparison atomic beam eEDM experiment when I joined Edgar Lipworth's group at Brandeis University as a very young second- year graduate student. Published in PRL ([Weisskopf et al., 1968; link to journal), it set a new limit to the eEDM. My second experiment was my thesis experiment: a PRL- published thallium-alkali comparison experiment (Gould, 1970; link to journal) that tied the Cs result. Arriving at the Lawrence Radiation Laboratory in 1971, I did atomic collisions and QED experiments using few-electron heavy ions at the Super-HILAC (to Kr34+), the Bevalac (to U92+), and, in 1995, my last heavy ion experiment, at the Brookhaven AGS (Au 78+). |
| Old lab 2006: former HILAC cave - "natural" heating and cooling, tight fit. | New lab. - great temperature control, lots of space before moving all our stuff in. | |
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Completed moving into
new lab Feb. 2008. The lab is a low-noise low-background counting area
where element 102 was discovered by Ghiorso, Sikkeland, Walton, and
Seaborg (PRL. 1, 18 [1958]). • The lab is shielded by building steel (cell phones do not work) and floor vibration is extremely low. • Equipment for glass resistivity measurements has arrived and we are starting do do R & D for magnetic shielding and demagnetization to reach very low magnetic fields • This web page was updated March. 15, 2008. |
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