Optimising Ion Transport in a Thermal Ionisation Mass Spectrometer and Plasma Ion Source Using Monte Carlo Simulations

Flowerdew, Jake Anthony Darri

Optimising Ion Transport in a Thermal Ionisation Mass Spectrometer and Plasma Ion Source Using Monte Carlo Simulations

dc.contributor.advisor	Thompson, Robert Ian
dc.contributor.advisor	Wieser, Michael E.
dc.contributor.author	Flowerdew, Jake Anthony Darri
dc.contributor.committeemember	Jackel, Brian J.
dc.contributor.committeemember	Kwiatkowski, Anna A.
dc.contributor.committeemember	Friesen, Timothy P.
dc.date	2019-11
dc.date.accessioned	2019-09-24T16:18:59Z
dc.date.available	2019-09-24T16:18:59Z
dc.date.issued	2019-09-20
dc.description.abstract	The controlled collimation of ion beams is of paramount importance in particle accelerators, high energy beamlines, and detector systems, as it determines the functionality, sensitivity and resolution of the instruments. In this thesis the ion source of a thermal ionization mass spectrometer (TIMS), comprised of a heated filament followed by a series of ion optical lenses, was modelled and Monte Carlo simulations were performed using SIMION. The potentials of three of the electrostatic lenses were optimized, in order to maximize the illuminated area of the exit slit. The optimization method employed achieved up to a 44 % increase in experimental signal intensity when compared to the existing manufacturer-provided lens tuning algorithm. 3D plots were effective in visualizing whether this new voltage configuration leads to a solution which lies in a local or global optimum, showing that the previous tuning technique was rarely successful in achieving the global optimum. This modelling and optimization approach was then used to aid the commissioning of a plasma ion source at the TITAN experiment at TRIUMF. The Plasma Ion Source (PIS), comprised of a heated filament followed by an anode, Einzel lens and X-Y correction steerers, was modelled and Monte Carlo simulations were performed. Optimising the voltage configurations in these simulations has proved successful in the commissioning of the PIS at the TITAN experiment in thermal mode, where ions from the source have been characterised using the time-of-flight method. The PIS will be able to deliver important calibration beams to TITAN’s experiments and will also enable off-line, high precision isotope composition measurements with the Multiple-Reflection Time-Of-Flight Mass Spectrometer (MR-TOF MS).	en_US
dc.identifier.citation	Flowerdew, J. A. D. (2019). Optimising Ion Transport in a Thermal Ionisation Mass Spectrometer and Plasma Ion Source Using Monte Carlo Simulations (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.	en_US
dc.identifier.doi	http://dx.doi.org/10.11575/PRISM/37111
dc.identifier.uri	http://hdl.handle.net/1880/111049
dc.language.iso	eng	en_US
dc.publisher.faculty	Science	en_US
dc.publisher.institution	University of Calgary	en
dc.rights	University of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.	en_US
dc.subject	Monte Carlo	en_US
dc.subject	Optimisation	en_US
dc.subject	Ion optics	en_US
dc.subject	SIMION	en_US
dc.subject	Simulations	en_US
dc.subject	TIMS	en_US
dc.subject	TITAN	en_US
dc.subject	Plasma Ion Source	en_US
dc.subject.classification	Physics	en_US
dc.subject.classification	Physics--Nuclear	en_US
dc.subject.classification	Optics	en_US
dc.title	Optimising Ion Transport in a Thermal Ionisation Mass Spectrometer and Plasma Ion Source Using Monte Carlo Simulations	en_US
dc.type	master thesis	en_US
thesis.degree.discipline	Physics & Astronomy	en_US
thesis.degree.grantor	University of Calgary	en_US
thesis.degree.name	Master of Science (MSc)	en_US
ucalgary.item.requestcopy	true	en_US