Physics Honours Thesis Presentations by PHYS 4501 YA Students - A. Alexandrov and A. Stieh

Event Date: 
Tuesday, March 28, 2023 - 8:30am EDT
Event Location: 
ATAC 3006
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
mcgallag@lakeheadu.ca

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The Department of Physics Invites You to Attend 

PHYS 4501 YA 
Honours Thesis Presentations By:

ALEXANDER ALEXANDROV
Investigation of Dark Current Kinetics and X-Ray Photoconductivity in
Amorphous Lead-Oxide (a-PbO) X-Ray Detectors
Supervisor: Dr. A. Reznik

AMY STIEH
Stress in Thick Layers of an Amorphous Lead-
Oxide (a-PbO) Photoconductor
Supervisor: Dr. A. Reznik


TUESDAY, MARCH 28, 2023
in AT 3006 at 8:30 am
or Zoom

 A Zoom option is available for those who cannot attend in person.  
To participate email mcgallag@lakeheadu.ca or kcarey@lakeheadu.ca for the link and password


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Physics MSc Thesis Defense Presented By Tristen T. Thibault

Event Date: 
Thursday, December 8, 2022 - 1:00pm EST
Event Location: 
CB 4056
Event Contact Name: 
Dr. Alla Reznik / Dr. Gautam Das
Event Contact E-mail: 
areznik@lakeheadu.ca

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The Department of Physics Invites You To Attend A Master of Science
Thesis Defense Presented By:

TRISTEN T. THIBAULT
"Dark current modeling and characterization of amorphous lead oxide-based x-ray 
photoconductive devices for application in x-ray medical imaging" 
Supervisor: Dr. A. Reznik

Thursday, December 8, 2022
in CB 4056 at 1:00 PM or Zoom
(Contact areznik@lakeheadu.ca or kcarey@lakeheadu.ca for link and password)


Abstract:
The reduction of the dark current (DC) to a tolerable level in X-ray photoconductors is one of the key factors for their application as X-ray-to-charge transducers in the direct conversion flat panel X-ray imagers (FPXIs). Here, we discuss the origins of DC in an X-ray-to-charge transducer that is based on one of the most promising X-ray photoconductors: amorphous lead oxide (a-PbO). The transient DC in an a-PbO blocking structure is measured at different applied electric fields (5–20 V/μm). The experimental results are used to develop a theoretical model describing the electric field-dependent transient behavior of DC. We show that DC decay is caused by charge accumulation in deep localized states (traps) within the blocking layer. Accounting for the field-induced charge carrier release from traps, enhanced by charge hopping transitions, yields an excellent fit between the experimental and simulated results, thus clarifying the dynamic process of reaching a steady-state occupancy level of the deep localized states in the blocking layer. The model can be used to find an approximate optimal thickness of blocking layers for future iterations of a-PbO – based detectors without the need for time and labor-intensive experimental trial and error.
 

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Physics Mid-Term Research Presentations by 4501 YA Students - A. Alexandrov and A. Stieh

Event Date: 
Tuesday, November 29, 2022 - 1:00pm EST
Event Location: 
in person ATAC 3006 or Zoom
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
mcgallag@lakeheadu.ca

  Physics logo

The Department of Physics Invites You to Attend 

PHYS 4501 YA STUDENT MID-TERM
RESEARCH PRESENTATIONS BY:

ALEXANDER ALEXANDROV
Investigation of Dark Current Kinetics and X-Ray Photoconductivity in
Amorphous Lead-Oxide (a-PbO) X-Ray Detectors
Supervisor: Dr. A. Reznik

AMY STIEH
Stress in Thick Layers of an a-PbO Photoconductor
Supervisor: Dr. A. Reznik

TUESDAY, NOVEMBER 29, 2022
ATAC 3006 or Zoom
at 1:00 PM

To participate via Zoom email mcgallag@lakeheadu.ca  for the link and password


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Physics Poster Presentations by PHYS 4113 (Class.Mech.II) Students on Friday December 2, 2022

Event Date: 
Friday, December 2, 2022 - 9:30am EST
Event Location: 
LI5002
Event Contact Name: 
Dr. Hubert de Guise
Event Contact E-mail: 
hdeguise@lakeheadu.ca

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Poster Presentations by PHYS 4113 FA
(Class.Mech.II) Students:

The Logistics Map
Henry Maa-Hacquoil and Dominic Roy

Motion of a Bouncing Ball
Emily McKenna and Katherine Lucas  

The Lorenz Equations
Alexander Alexandrov and Aaron Rossi

The Hénon-Heiles Potential
Shyla-Maye Anderson

The Restricted 3-Body Problem
Joshua Grasley and Aaron Hodgson

The posters will be displayed for ~30 minutes starting at 9:30 AM, followed by presentations commencing at 10:00 AM.

FRIDAY, DECEMBER 2nd, 2022
LI5002 (Library 5th floor)
9:30AM - 11:00AM


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Department of Physics Seminar presented by Dr. Olivia Di Matteo, Assistant Professor, UBC

Event Date: 
Thursday, November 10, 2022 - 10:30am EST
Event Location: 
CB 4058
Event Contact Name: 
Dr. H. de Guise
Event Contact E-mail: 
hdeguise@lakeheadu.ca
 Physics logo

The Department of Physics invites you to attend
a seminar presented by:
 
DR. OLIVIA DI MATTEO
Assistant Professor
Electrical and Computer Engineering
University of British Columbia
Thursday, November 10, 2022
10:30 a.m.
in CB 4058
 
Fidelity susceptibility is a physical quantity that can be used to study quantum phase transitions in a variety of condensed matter models. The closed-form expression of this quantity requires knowledge of the energy spectrum of a Hamiltonian; however it has been previously shown that it can also be computed from second-order derivatives of overlaps involving the ground state wave function. We show how such a calculation can be performed using variational quantum algorithms and quantum differentiable programming.  Automatic differentiation is leveraged to compute the required energy and overlap derivatives directly from the results of quantum circuits, running on simulators or hardware, that have been trained to prepare the ground state of the system. We study a small case, using the transverse-field Ising model, and outline the viability and challenges that arise when solving this problem on near-term quantum hardware.

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Department of Physics Seminar presented by Dr. Oleksandr Bubon

Event Date: 
Tuesday, September 20, 2022 - 1:30pm EDT
Event Location: 
CB 4058
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
mcgallag@lakeheadu.ca
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The Department of Physics invites you to attend
a seminar presented by:
 
DR. OLEKSANDR BUBON
Associate Scientist, 
Thunder Bay Regional Health Research Institute,
CTO, Radialis Medical
 
1:30 PM in CB 4058
 
Abstract:
Albert Rose, the visionary at the Radio Corporation of America (first observed that image noise in television was due to the number of photons contributing to each image, and thus the image could be improved by increasing the quantum efficiency (of optical detectors (‘making every photon count’).  Our research on advanced technology for Positron Emission Tomography (detectors is based on this fundamental notion but also makes a step forward in ‘counting every photon’, meaning that instead of increasing the number of gamma photons used, we optimize the use of available radiation with the most sensitive PET detector.  This allows us to significantly decrease the radiation exposure associated with PET imaging and to minimize the potential damaging effects of excess radiation on human tissue.

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PHYSICS 4501 - Honours Thesis Presentation by: E. Pineau

Event Date: 
Tuesday, April 5, 2022 - 11:00am EDT
Event Location: 
RC 1003 - In Person/Zoom Event
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
mcgallag@lakeheadu.ca

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The Department of Physics Invites You to Attend 

PHYS 4501
HONOURS THESIS PRESENTATION
by:

EMMA PINEAU
Research and Development of Novel Materials for Direct Conversion X-Ray Detectors
Supervisor: Dr. A. Reznik

TUESDAY, APRIL 5, 2022
in RC 1003
at 11:00 AM
Coffee and cookies will be provided

A Zoom option is available for those who cannot attend in person.
To participate email mcgallag@lakeheadu.ca or kcarey@lakeheadu.ca
for the link and password

 


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Physics Poster Presentations by PHYS 4115 students - J. Grasley, T. Li, Y. Nandanan, A. Lopez and E. Pineau

Event Date: 
Friday, December 3, 2021 - 1:00pm EST
Event Location: 
RC 1001
Event Contact Name: 
Dr. H. de Guise
Event Contact E-mail: 
hdeguise@lakeheadu.ca

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The Department of Physics Invites You to Attend
Poster Presentations by PHYS 4115 FA Students

Isospin in Nuclear and Particles Physics
By Joshua Grasley, Tianying Li and Yedhu Nandanan

Grover’s Algorithm
By Adam Lopez and Emma Pineau


FRIDAY, DECEMBER 3rd, 2021
RC 1001
1:00 PM - 2:30 PM

 


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PHYSICS Mid-term Presentations by PHYS 4501 students - G. MacLean and E. Pineau

Event Date: 
Friday, November 26, 2021 - 3:00pm EST
Event Location: 
Zoom
Event Contact Name: 
Dr. Mark Gallagher
Event Contact E-mail: 
mcgallag@lakeheadu.ca

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The Department of Physics Invites You to Attend
Mid-Term Presentations by PHYS 4501 YA Students

GUINEVERE MACLEAN
Susceptible-Infected-Recovered (SIR) Compartmental Modelling of Viral Infections

EMMA PINEAU
Research and Development of Novel Direct Conversion X-Ray Detectors

FRIDAY, NOVEMBER 26, 2021
300 PM via Zoom

 

Zoom link, login and password email Dr. M. Gallagher
mcgallag@lakeheadu.ca


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PHYSICS Final Oral Presentation by PHYS 4501 FDE student (Zoom event) - S. White

Event Date: 
Thursday, April 29, 2021 - 1:00pm EDT
Event Location: 
Zoom Event
Event Contact Name: 
Dr. Apichart Linhananta
Event Contact E-mail: 
alinhana@lakeheadu.ca

The Department of Physics invites you to virtually attend a
Final Oral Presentation by PHYS 4501 FDE student:

SACHA WHITE
"Factors Influencing Particle Removal Efficiency of Mask Filter Media"

 THURSDAY, APRIL 29th, 2021
Time: 1:00 PM

(for Zoom link and password email alinhana@lakeheadu.ca)


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