A cooler Penning trap to cool highly charged radioactive ions and mass measurement of 24Al

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dc.contributor.authorChowdhury, Usman
dc.contributor.examiningcommitteeGwinner, Gerald (Physics and Astronomy), Gericke, Michael (Physics and Astronomy), Sharma, Kumar (Physics and Astronomy), Van Wijngaarden, Jennifer (Chemistry)en_US
dc.contributor.supervisorGwinner, Gerald (Physics and Astronomy)en_US
dc.date.accessioned2016-06-30T19:06:50Z
dc.date.available2016-06-30T19:06:50Z
dc.date.issued2016
dc.degree.disciplinePhysics and Astronomyen_US
dc.degree.levelDoctor of Philosophy (Ph.D.)en_US
dc.description.abstractPenning trap mass spectrometry (PTMS) can be used to test the Standard Model (SM) and to answer the questions related to the origin and abundance of the elements in the universe. There are several facilities worldwide specialized in PTMS and some of them can measure the masses of isotopes with half-lives in the range of milliseconds. TRIUMF’s ion trap for atomic and nuclear science (TITAN) is one such facility. In mass measurement the precision is linearly proportional to the charge state of the ion of interest. To increase the charge state, ions are charge-bred using an electron beam ion trap (EBIT) at TITAN. However, the charge breeding process introduces an energy spread among the ions which adversely affects the precision of the mass measurement. To overcome this problem a cooler Penning trap (CPET) was designed, assembled and is now being tested off-line. This thesis presents the first systematic test results of CPET. We also present the result of the first Penning trap mass measurement of the isotope 24Al, which is five times more precise than the previous atomic mass evaluation (AME2012) value. The precise and accurate mass of 24Al is important for both astrophysics and for test of the standard model (SM). The resonance energy (E_r) calculated for the 23Mg(p,gamma)24Al reaction using the ground state mass of 24Al reported in this thesis shows a 2s deviation from the direct measurement. On the other hand, tests of the SM by evaluating f_t values using isospin T = 1 nuclides have reached a high precision level. Effort is now shifting towards the T = 2 nuclides, which are far from stability compared to their T = 1 counterparts. For this reason, the ground state masses of T = 2 nuclides and of their decay products are required to be known with high precision. 24Al is the daughter of one such nucleus, 24Si. The ground state mass of 24Al reported in this thesis will be useful to test the SM.en_US
dc.description.noteOctober 2016en_US
dc.identifier.urihttp://hdl.handle.net/1993/31511
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectTITANen_US
dc.subjectCPETen_US
dc.subjectMPETen_US
dc.subjectPrecision mass measurementen_US
dc.subjectCooler trapen_US
dc.subjectDiocotron modeen_US
dc.subjectnon-neutral electron plasmaen_US
dc.subjectStandard modelen_US
dc.subjectr-processen_US
dc.subjectUltra high vacuum bakingen_US
dc.subjectControl systemen_US
dc.subjectLabVIEWen_US
dc.titleA cooler Penning trap to cool highly charged radioactive ions and mass measurement of 24Alen_US
dc.typedoctoral thesisen_US
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