David Anez, Graduate Student

Supervised by Dr. Adam Sarty: 2008-Present

Graduate Thesis Topic: Precision Polarization Measurements in Gamma Ray

Studies of the Proton at MAMI

Cristina Collicott - BSc. Honours Astrophysics, PhD Physics

Supervised by Dr. Adam Sarty: 2008 - present

Undergraduate Thesis: Development of trigger-simulation software for the CB-TAPS Detector

Graduate Topic: TBA

Cristina has worked within Dr. Adam Sarty's research group since the second year of her undergraduate degree (B.Sc in Astrophysics at Saint Mary's University).

She is currently in her second year of a Ph.D program in Physics at Dalhousie University. Cristina's research focus is in nuclear physics and hadronic structure studies. Specifically, she is working with the Institute for Nuclear Physics in Mainz, Germany, where they are conducting experiments to measure the spin polarizabilities of the proton using high-energy Compton scattering.

Abstract (Undergraduate): Upcoming experiments at the Institut FÜr Kernphysik at the Johannes Gutenberg-Universitaet in Mainz, Germany will seek to use High-energy Compton scattering experiments to probe the internal structure of the proton. For these upcoming experiments, modifications must be made to the existing software and hardware of the Mainz facility; an updated trigger system for the Crystal Ball and TAPS detectors is one such change under consideration. Trigger simulation software has been implemented into the existing simulation software for the A2 collaboration of the MAMI facility. Furthermore, the simulation software was tested by evaluating ideal Trigger Conditions for the upcoming High-Energy Compton scattering experiments. An ideal trigger system (with the goal of reducing data readout from background π0 production reactions), was suggested with the following trigger conditions: accept events with a Crystal Ball Coindence Count = 2 with a coplanarity requirement. The net result of this applied trigger system, averaged over the simulated incident photon energy range of Eγ = 200-300 MeV, is an acceptance of 83.2% of Compton scattering events (missing only 16.6%), while at the same time a rejection of 68.3% of the undesired π0 production events.

Jessica Campbell - Undergraduate, Mathematics and Honours Physics

Supervised by Dr. Adam Sarty: 2011 - present

Undergraduate Thesis: Functionality of Hamamatsu Photomultiplier Tubes

Jessica is entering the 4th year of her Mathematics and Physics degree at Saint Mary’s University.The summer after her second year, Jessica assisted Jason in the testing of modules and equipment, as well as, helped with the set up of the experiment for Jason’s thesis research project. Furthermore, she was also in charge of constructing a new scintillating plate (thinner and smaller to improve the experimental set-up). Ashley and Jessica conceptually designed a 3m x 0.8m scintillating detector system consisting of thousands of 2 mm scintillating fibers. This system is being designed to detect particles for BigCal in Hall C at Jefferson Lab.

This past summer, Jessica and Nathan traveled to Jefferson Lab in Virginia to test over 600 photomultiplier tubes and gather data for her honours thesis. These photomultiplier tubes are going to be used in a detector in one of Jefferson Lab's experimental halls.

Rebecca Campbell - Undergraduate, Astrophysics

Supervised by Dr. Adam Sarty: 2011 - present
Undergraduate Thesis: TBA
Rebecca is entering the 3rd year of her Astrophysics degree at Saint Mary’s University. Last summer was her first research experience and she spent the majority of this summer in Germany at the Nuclear Physics Institute of the Johannes Gutenberg University Mainz. Last summer Rebecca was given a computer programming project. Specifically, she was programming a Root macro to perform event rate calculations useful for physicists at the institute when they are writing their research proposals. The program will help to calculate how much beam time they will need in order to get statistically significant data.

Nathan Murtha - Undergraduate, Mathematics and Physics

Supervised by Dr. Adam Sarty: 2012 - present

Nathan is entering 2nd year of his Mathematics and Physics degree at Saint Mary's University. This past summer, he went to Jefferon Lab in Virginia with Jessica and helped her collect data for her honours thesis. They tested several hundred photomultiplier tubes that are to be used in a detector in one of the experimental halls.


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