Graduate Student
Stanford, Ca
Experimental R&D for the EXO experiment:Designed and built a device to test barium ion extraction from liquid xenon, including thevacuum vessel, cryogenic cooling, xenon gas delivery, computer control, and ion optics.Simulated the time-of-flight spectrometer using SIMION to ensure the very high ion transport efficiency required.Built a resonant laser photoionization system to provide high-efficiency, high-selectivity re-ionization of barium.Instrumented the system to read out pressures, temperatures, photodiodes and ion detectors using LabVIEW.Co-developed a radionuclide-driven single-ion barium source for use in barium tagging R&D, which has been used in this system as well as systems testing barium tagging from gaseous xenon detectors. Designed a second source using spontaneous fissions of Californium-252 to produce barium ions in liquid xenon.Wrote analysis scripts using Python to interpret data from the experiment and develop newsurface preparations and designs.Mentored a younger graduate student to become an intellectual contributor on this project.Presented this work at TIPP 2011 and TAUP 2013.Helped construct and commission the EXO-200 experiment.