{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/30761"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/30761","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A test of parity conservation in proton-proton scattering at 15 MeV","abstract":"An experiment has been performed at the Los Alamos Scientific Laboratory tandem Van de Graaff to test the conservation of parity in proton-proton scattering. A parity violating effect was sought bv measuring the correlation bet\\<1een the total p-p cross section and the he1icity of the incident beam. The experiment used integral counting techniques to achieve the high data rate required. The Van de Graaff Lamh-shift polarized ion source was modified to permit reversing the direction of polarization at a 1 kHz rate. The experiment used analog signal processing; the corre1at1.on between the cross section and the beam he1icity was measured using a phase-locked amplifier. The means for rapidly reversing the beam polarization and the methods for reduction of systematic errors are discussed. The measured longitudinal asymmetry AL=(δ+-δ_)/(δ++δ_) for p-p scattering at 15 MeV is (-1.8 ± 2.0) X 10-7 and the 95% confidence 6x 10-7 including the effects of systematic errors.","abstract_html":"An experiment has been performed at the Los Alamos Scientific Laboratory tandem Van de Graaff to test the conservation of parity in proton-proton scattering. A parity violating effect was sought bv measuring the correlation bet\\&lt;1een the total p-p cross section and the he1icity of the incident beam. The experiment used integral counting techniques to achieve the high data rate required. The Van de Graaff Lamh-shift polarized ion source was modified to permit reversing the direction of polarization at a 1 kHz rate. The experiment used analog signal processing; the corre1at1.on between the cross section and the beam he1icity was measured using a phase-locked amplifier. The means for rapidly reversing the beam polarization and the methods for reduction of systematic errors are discussed. The measured longitudinal asymmetry AL=(δ+-δ_)/(δ++δ_) for p-p scattering at 15 MeV is (-1.8 ± 2.0) X 10-7 and the 95% confidence 6x 10-7 including the effects of systematic errors.","abstract_has_math":false,"creators":["Potter, James Martin"],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Frauenfelder, Hans"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-04-26T17:49:06Z","date_published":"2012-04-26T17:49:06Z","updated_at":"2026-07-22T22:25:29Z","subjects":["proton-proton scattering","decay parity","necleon-necleon scattering","parity non-conservation"],"languages":["en"],"rights":["© 1975 James Martin Potter"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["2674228"],"render_values":[{"text":"2674228","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/30761","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Frauenfelder, Hans"]},{"key":"dc:creator","label":"Author","values":["Potter, James Martin"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-04-26T17:49:06Z","10000-01-01","1975"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["proton-proton scattering","decay parity","necleon-necleon scattering","parity non-conservation"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["© 1975 James Martin Potter"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["2674228","http://hdl.handle.net/2142/30761"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["An experiment has been performed at the Los Alamos Scientific Laboratory tandem Van de Graaff to test the conservation of parity in proton-proton scattering. A parity violating effect was sought bv measuring the correlation bet\\<1een the total p-p cross section and the he1icity of the incident beam. The experiment used integral counting techniques to achieve the high data rate required. The Van de Graaff Lamh-shift polarized ion source was modified to permit reversing the direction of polarization at a 1 kHz rate. The experiment used analog signal processing; the corre1at1.on between the cross section and the beam he1icity was measured using a phase-locked amplifier. The means for rapidly reversing the beam polarization and the methods for reduction of systematic errors are discussed. The measured longitudinal asymmetry AL=(δ+-δ_)/(δ++δ_) for p-p scattering at 15 MeV is (-1.8 ± 2.0) X 10-7 and the 95% confidence 6x 10-7 including the effects of systematic errors.","Submitted by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-04-26T17:49:06Z No. of bitstreams: 1 1975_potter.pdf: 2513767 bytes, checksum: dec19f6b1803bbcaea7b2802c343b997 (MD5)","Made available in DSpace on 2012-04-26T17:49:06Z (GMT). No. of bitstreams: 1 1975_potter.pdf: 2513767 bytes, checksum: dec19f6b1803bbcaea7b2802c343b997 (MD5) Previous issue date: 1975","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-04-26T17:49:06Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:33:02-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: dissertation/thesis","dissertation/thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["A test of parity conservation in proton-proton scattering at 15 MeV"]}]}],"canonical_facts":{"dc:contributor":["Frauenfelder, Hans"],"dc:creator":["Potter, James Martin"],"dc:date":["2012-04-26T17:49:06Z","10000-01-01","1975"],"dc:description":["An experiment has been performed at the Los Alamos Scientific Laboratory tandem Van de Graaff to test the conservation of parity in proton-proton scattering. A parity violating effect was sought bv measuring the correlation bet\\<1een the total p-p cross section and the he1icity of the incident beam. The experiment used integral counting techniques to achieve the high data rate required. The Van de Graaff Lamh-shift polarized ion source was modified to permit reversing the direction of polarization at a 1 kHz rate. The experiment used analog signal processing; the corre1at1.on between the cross section and the beam he1icity was measured using a phase-locked amplifier. The means for rapidly reversing the beam polarization and the methods for reduction of systematic errors are discussed. The measured longitudinal asymmetry AL=(δ+-δ_)/(δ++δ_) for p-p scattering at 15 MeV is (-1.8 ± 2.0) X 10-7 and the 95% confidence 6x 10-7 including the effects of systematic errors.","Submitted by Megan O'Donnell (mnodonn2@illinois.edu) on 2012-04-26T17:49:06Z No. of bitstreams: 1 1975_potter.pdf: 2513767 bytes, checksum: dec19f6b1803bbcaea7b2802c343b997 (MD5)","Made available in DSpace on 2012-04-26T17:49:06Z (GMT). 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