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Experiments with a Metastable Helium Atomic Trap

Colla, Massimiliano

Description

In this work I report on the development of a Magneto Optic Trap (MOT) for metastable helium atoms (He*). The metastable helium atoms are produced in a discharge nozzle source and collimated, slowed and compressed to provide a slow bright beam for loading the trap. The trap confines approximately 107 atoms, has a diameter of about 3 mm and with temperature approximately 1 mK. The trap is used for intra-trap and electron-atom scattering experiments. The results from these two experiments are...[Show more]

dc.contributor.authorColla, Massimiliano
dc.date.accessioned2008-03-04T03:44:30Z
dc.date.accessioned2011-01-04T02:37:44Z
dc.date.available2008-03-04T03:44:30Z
dc.date.available2011-01-04T02:37:44Z
dc.identifier.otherb22794153
dc.identifier.urihttp://hdl.handle.net/1885/46250
dc.description.abstractIn this work I report on the development of a Magneto Optic Trap (MOT) for metastable helium atoms (He*). The metastable helium atoms are produced in a discharge nozzle source and collimated, slowed and compressed to provide a slow bright beam for loading the trap. The trap confines approximately 107 atoms, has a diameter of about 3 mm and with temperature approximately 1 mK. The trap is used for intra-trap and electron-atom scattering experiments. The results from these two experiments are reported. The electron scattering experiment is unique and employs a He* MOT for the first time, in combination with a new diagnostic technique (Phase Modulation Spectroscopy) to measure the trap loss. The results of these experiments have yielded the first total electron-metastable atom collision cross section measurements at intermediate (10-100 eV) electron energies.
dc.language.isoen
dc.rights.uriThe Australian National University
dc.subjectatom-optics
dc.subjectlasers
dc.subjectlaser cooling
dc.subjectMOT
dc.subjecthelium
dc.subjectscattering
dc.subjectelectron
dc.subjectcross section
dc.titleExperiments with a Metastable Helium Atomic Trap
dc.typeThesis (PhD)
dcterms.valid2006
local.description.refereedyes
local.type.degreeDoctor of Philosophy (PhD)
dc.date.issued2006
local.contributor.affiliationThe Australian National University
local.contributor.affiliationResearch School of Physical Sciences and Engineering, AMPL
local.identifier.doi10.25911/5d7a2aaf234ba
local.mintdoimint
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