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Single Ion Tagging for the Enriched Xenon Observatory

Abstract: This talk will discuss the first trapping and observation of a single Ba ion in a buffer-gas filled linear RF Paul trap. Imaging of a single ion under these conditions is challenging due to the heavy Doppler broadening of the ion's linewidth and the spatial extent of the ion's motion in the trap. This technique is required by, and was developed for an ultra-rare decay experiment called EXO, searching for neutrinoless double beta decay of Xe-136. Observation of this decay would allow for the first direct measurement of neutrino mass, in addition to opening doors to new physics beyond the Standard Model. The talk will cover the concepts behind single ion trapping, the construction of the trap itself, the imaging of a room temperature trapped ion, some simple collisional dynamics that have been observed with a Ba ion, and current R&D on a "probe" for physically grabbing a single Ba ion.
Speaker: Dr. Jesse Wodin - SLAC
Speaker Bio: Jesse Wodin is currently a postdoc for Marty Briendebach at SLAC, working on the EXO neutrinoless double beta decay experiment. In 2007, Jesse received his PhD. from the Stanford Physics Department under Giorgio Gratta for work done on trapping and observing single Ba ions in a buffer gas, in addition to liquid Xe energy detector physics studies. Prior to this, Jesse worked under Peter Fisher at MIT on the Alpha Magnetic Spectrometer.
Poster Link: Poster
Presentation: Presentation on 2/21/2007 (PDF)