{"id":{"repo_id":"washington","oai_identifier":"oai:digital.lib.washington.edu:1773/50899"},"canonical_url":"https://search.dev.ndltd.org/etd/washington/oai:digital.lib.washington.edu:1773/50899","repository":{"repo_id":"washington","name":"University of Washington","base_url":"https://digital.lib.washington.edu/server/oai/request"},"display":{"title":"Beam Dynamics Challenges in the Muon g-2 Experiment","abstract":"The muon's anomalous magnetic moment $a_{\\mu}$ has hinted at physics beyond the standard model for nearly 20 years. The Muon $g-2$ experiment at Fermilab aims to measure $a_{\\mu}$ to 140 parts per billion (ppb) precision. The 460 ppb result from its first data run (Run-1), released in 2021, agreed with the previous 2006 Brookhaven Muon $g-2$ result. The experimental average stands in tension with the standard model theory $a_{\\mu}$ prediction by $4.2 \\sigma$. The result of Run-2/3 data analysis is set be released in summer 2023, and will improve on the Run-1 precision by a factor of two. With the data collected in all six runs, the experiment is on track to produce a 140 ppb measurement of $a_{\\mu}$. If the experiment and theory central values are both unchanged, the tension would exceed $5 \\sigma$. The measurement is accomplished by injecting muons into a magnetic storage ring and precisely measuring two observable frequencies: $\\omega_a$, the muons' anomalous precession frequency, and $\\tilde{\\omega}'_p$, the precession frequency of protons which determines the magnetic field strength experienced by the muons. This thesis presents a selection of muon beam dynamics effects which are critical for reaching the experiment precision goal. A system of detectors assists with the challenging beam injection into the storage ring, and a measurement of the injected beam provides input for simulating the stored beam dynamics. A new method is introduced to reduce a critical systemic caused by time dependence in the stored beam momentum, enabled by a detector which directly profiles the stored beam. Finally the analysis of $\\tilde{\\omega}'_p$, the muon-weighted magnetic field, for the Run-2/3 result is presented. Systematics of $\\tilde{\\omega}'_p$ due to beam effects are evaluated in detail, and shown to be sub-dominant.","abstract_html":"The muon&#x27;s anomalous magnetic moment <span class=\"etd-inline-math\">a<sub>&mu;</sub></span> has hinted at physics beyond the standard model for nearly 20 years. The Muon $g-2$ experiment at Fermilab aims to measure <span class=\"etd-inline-math\">a<sub>&mu;</sub></span> to 140 parts per billion (ppb) precision. The 460 ppb result from its first data run (Run-1), released in 2021, agreed with the previous 2006 Brookhaven Muon $g-2$ result. The experimental average stands in tension with the standard model theory <span class=\"etd-inline-math\">a<sub>&mu;</sub></span> prediction by <span class=\"etd-inline-math\">4.2 &sigma;</span>. The result of Run-2/3 data analysis is set be released in summer 2023, and will improve on the Run-1 precision by a factor of two. With the data collected in all six runs, the experiment is on track to produce a 140 ppb measurement of <span class=\"etd-inline-math\">a<sub>&mu;</sub></span>. If the experiment and theory central values are both unchanged, the tension would exceed <span class=\"etd-inline-math\">5 &sigma;</span>. The measurement is accomplished by injecting muons into a magnetic storage ring and precisely measuring two observable frequencies: <span class=\"etd-inline-math\">&omega;<sub>a</sub></span>, the muons&#x27; anomalous precession frequency, and <span class=\"etd-inline-math\">\\tilde{&omega;}&#x27;<sub>p</sub></span>, the precession frequency of protons which determines the magnetic field strength experienced by the muons. This thesis presents a selection of muon beam dynamics effects which are critical for reaching the experiment precision goal. A system of detectors assists with the challenging beam injection into the storage ring, and a measurement of the injected beam provides input for simulating the stored beam dynamics. A new method is introduced to reduce a critical systemic caused by time dependence in the stored beam momentum, enabled by a detector which directly profiles the stored beam. Finally the analysis of <span class=\"etd-inline-math\">\\tilde{&omega;}&#x27;<sub>p</sub></span>, the muon-weighted magnetic field, for the Run-2/3 result is presented. Systematics of <span class=\"etd-inline-math\">\\tilde{&omega;}&#x27;<sub>p</sub></span> due to beam effects are evaluated in detail, and shown to be sub-dominant.","abstract_has_math":true,"creators":["MacCoy, Brynn"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Kammel, Peter"],"committee_chairs":[],"committee_members":[],"year":2023,"date_issued":"2023-09-27","date_published":"2023-09-27","updated_at":"2026-07-24T05:58:12Z","subjects":["anomalous magnetic moment","beam dynamics","particle physics","precision muon physics"],"languages":["en_US"],"rights":["CC BY"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1773/50899","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Kammel, Peter"]},{"key":"dc:creator","label":"Author","values":["MacCoy, Brynn"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2023-09-27T17:21:45Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2023-09-27T17:21:45Z"]},{"key":"dc:date.issued","label":"Date","values":["2023-09-27"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["anomalous magnetic moment","beam dynamics","particle physics","precision muon physics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_US"]},{"key":"dc:rights","label":"Dc Rights","values":["CC BY"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.other","label":"Dc Identifier Other","values":["MacCoy_washington_0250E_25963.pdf"]},{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1773/50899"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Thesis (Ph.D.)--University of Washington, 2023"]},{"key":"dc:description.abstract","label":"Abstract","values":["The muon's anomalous magnetic moment $a_{\\mu}$ has hinted at physics beyond the standard model for nearly 20 years. The Muon $g-2$ experiment at Fermilab aims to measure $a_{\\mu}$ to 140 parts per billion (ppb) precision. The 460 ppb result from its first data run (Run-1), released in 2021, agreed with the previous 2006 Brookhaven Muon $g-2$ result. The experimental average stands in tension with the standard model theory $a_{\\mu}$ prediction by $4.2 \\sigma$. The result of Run-2/3 data analysis is set be released in summer 2023, and will improve on the Run-1 precision by a factor of two. With the data collected in all six runs, the experiment is on track to produce a 140 ppb measurement of $a_{\\mu}$. If the experiment and theory central values are both unchanged, the tension would exceed $5 \\sigma$. The measurement is accomplished by injecting muons into a magnetic storage ring and precisely measuring two observable frequencies: $\\omega_a$, the muons' anomalous precession frequency, and $\\tilde{\\omega}'_p$, the precession frequency of protons which determines the magnetic field strength experienced by the muons. This thesis presents a selection of muon beam dynamics effects which are critical for reaching the experiment precision goal. A system of detectors assists with the challenging beam injection into the storage ring, and a measurement of the injected beam provides input for simulating the stored beam dynamics. A new method is introduced to reduce a critical systemic caused by time dependence in the stored beam momentum, enabled by a detector which directly profiles the stored beam. Finally the analysis of $\\tilde{\\omega}'_p$, the muon-weighted magnetic field, for the Run-2/3 result is presented. Systematics of $\\tilde{\\omega}'_p$ due to beam effects are evaluated in detail, and shown to be sub-dominant."]},{"key":"dc:format.mimetype","label":"Dc Format Mimetype","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Beam Dynamics Challenges in the Muon g-2 Experiment"]}]}],"canonical_facts":{"dc:contributor.advisor":["Kammel, Peter"],"dc:creator":["MacCoy, Brynn"],"dc:date.accessioned":["2023-09-27T17:21:45Z"],"dc:date.available":["2023-09-27T17:21:45Z"],"dc:date.issued":["2023-09-27"],"dc:description":["Thesis (Ph.D.)--University of Washington, 2023"],"dc:description.abstract":["The muon's anomalous magnetic moment $a_{\\mu}$ has hinted at physics beyond the standard model for nearly 20 years. The Muon $g-2$ experiment at Fermilab aims to measure $a_{\\mu}$ to 140 parts per billion (ppb) precision. The 460 ppb result from its first data run (Run-1), released in 2021, agreed with the previous 2006 Brookhaven Muon $g-2$ result. The experimental average stands in tension with the standard model theory $a_{\\mu}$ prediction by $4.2 \\sigma$. The result of Run-2/3 data analysis is set be released in summer 2023, and will improve on the Run-1 precision by a factor of two. With the data collected in all six runs, the experiment is on track to produce a 140 ppb measurement of $a_{\\mu}$. If the experiment and theory central values are both unchanged, the tension would exceed $5 \\sigma$. The measurement is accomplished by injecting muons into a magnetic storage ring and precisely measuring two observable frequencies: $\\omega_a$, the muons' anomalous precession frequency, and $\\tilde{\\omega}'_p$, the precession frequency of protons which determines the magnetic field strength experienced by the muons. This thesis presents a selection of muon beam dynamics effects which are critical for reaching the experiment precision goal. A system of detectors assists with the challenging beam injection into the storage ring, and a measurement of the injected beam provides input for simulating the stored beam dynamics. A new method is introduced to reduce a critical systemic caused by time dependence in the stored beam momentum, enabled by a detector which directly profiles the stored beam. Finally the analysis of $\\tilde{\\omega}'_p$, the muon-weighted magnetic field, for the Run-2/3 result is presented. Systematics of $\\tilde{\\omega}'_p$ due to beam effects are evaluated in detail, and shown to be sub-dominant."],"dc:format.mimetype":["application/pdf"],"dc:identifier.other":["MacCoy_washington_0250E_25963.pdf"],"dc:identifier.uri":["http://hdl.handle.net/1773/50899"],"dc:language.iso":["en_US"],"dc:rights":["CC BY"],"dc:subject":["anomalous magnetic moment","beam dynamics","particle physics","precision muon physics"],"dc:title":["Beam Dynamics Challenges in the Muon g-2 Experiment"],"dc:type":["Thesis"]},"updated_at":"2026-07-24T05:58:12Z"}