Extraction of a helium ion beam from an optically polarized helium source gas

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dc.contributor.advisorWalters, G. Kingen_US
dc.creatorStockwell, Norman Daviden_US
dc.date.accessioned2016-04-22T21:58:50Zen_US
dc.date.available2016-04-22T21:58:50Zen_US
dc.date.issued1965en_US
dc.description.abstractOptical pumping techniques can be used to produce nuclear polarization in He3 gas excited by a weak electric discharge. By optically polarizing He3 to a polarization P0 and extracting ions from the gas, the resulting ion beam is expected to retain a polarization between P0 and P0 /2 depending on the experimental conditions. Such a polarized beam would have great utility in nuclear physics. An ion source using this principle has been built by straight-forward modifications of normal rf ion-source geometry to provide the higher pressure and lower flow rate needed for the optical pumping. The dependences of ion current upon source gas pressure and cleanli-ness, electrical discharge intensity, the axial magnetic field, and the extraction voltage are measured. He4 rather than He3 has been used to date and ion-beam polarization cannot be measured with the present apparatus. However, under discharge and flow conditions which appear suitable for He3 polarization, beam current of 1 /ua are attained. Methods for measuring beam polarization are proposed. Some future experiments in atomic physics are considered.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent74 ppen_US
dc.identifier.callnoThesis Phys. 1965 Stockwellen_US
dc.identifier.citationStockwell, Norman David. "Extraction of a helium ion beam from an optically polarized helium source gas." (1965) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/89875">https://hdl.handle.net/1911/89875</a>.en_US
dc.identifier.digitalRICE0909en_US
dc.identifier.urihttps://hdl.handle.net/1911/89875en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleExtraction of a helium ion beam from an optically polarized helium source gasen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentPhysicsen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Artsen_US
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