Ionospheric Radars: An introduction to radio diagnostics of the ionosphere.

Speaker: Ashton Reimer
Location: Physics 175
Time: 3:30pm,  May 29, 2014

(Updated): Here is a link to the presentation here.

Abstract: Since Christian Hülsmeyer’s first use of radio waves to detect distant objects, radio detection and ranging or radar has expanded across many technological and scientific fields. This talk will focus on radar as it is used to probe the plasma environment of the upper atmosphere. An introduction to some of the radar theory and physical operation of the radars will be followed with a brief discussion of my PhD thesis work with the Canadian SuperDARN radars.

The OSIRIS aerosol inverse problem

Speaker: Landon Rieger
Location: Physics 175
Time: 3:30pm,  May 22, 2014

(Updated): A pdf of Landon’s talk can be found here.

Abstract: Solving underdetermined and ill-posed inverse problems is a common theme in geophysics, image processing and many other fields dealing with remote sensing. Although the problems vary widely, many similar techniques are used across disciplines. The OSIRIS aerosol inversion makes use of linear techniques to explore the information content of the measurements and sensitivity to various retrieved quantities. This information is used to develop a non-linear inversion technique to retrieve stratospheric aerosol profiles.

Magnetic Saturation of the Iron Core in the STOR-M Tokamak

Speaker: Greg Tomney
Location: Physics 175
Time: 3:30,  May 15 2014

(Update): Link to the presentation here.

Abstract: In the field of controlled nuclear fusion, the tokamak (a toroidal vacuum chamber which uses magnets to confine and heat plasma to fusion temperatures/ pressures) is one of the most promising candidates for a fusion reactor. The spherical tokamak (ST) has been a good candidate for tokamak reactor designs since its inception in the 1980s. The design boasts economic benefits that are especially important for labs looking to build tokamaks for research as the ST cuts down on the cost of the large magnets needed to establish the strong magnetic fields in a tokamak. One of the problems with the ST design is less space for a centre solenoid which can be used to induce plasma current. Using the iron-core tokamak STOR-M we are able to study plasma performance as the core becomes increasingly magnetized. This effect is of some concern to the tokamak community as it becomes more pronounced as the size of the tokamak core region (the hole in the tokamak torus) decreases.

Travel Funding for CAP Congress 2014

Attention to all P&EP Grad Students. If you are presenting at the 2014 CAP Congress, held June 16-20 at Laurentian University, the department will provide funding towards your travel expenses up to $500.  The amount provided will depend on how many students are going.

Go see Marj in the Physics office for further information if you are planning to attend

Investigating the Two-Photon Decay

Speaker: Ronan Lefol
Location: Physics 175
Time: 3:30 pm May 08 2014

(Updated) Link to the presentation: here

Abstract:
Although observed in the 0 + → 0 + transition, the measurement for the two photon decay has not been accomplished in the situation of varying energy states. In this thesis, I develop upon the proceeding to prepare and develop the experimental procedures in order to measure the two photon decay. The end results demonstrate that, in order to obtain high quality and accurate results, the two photon decay will be observed using a 137 Cs source. The detector array will consist of 10 LaBr3 detectors paired in groups of two, centered around the source with a lead shield placed between each detector.

PEGASUS Summer Seminar Series (Updated)

The PEGASUS Summer Seminar Series is back! We are kicking off the first seminar today in fact. Below are the relevant details:

Speaker: Ronan Lefol
Location: Physics 175
Time: 3:30 May 08 2014

(Updated) Link to the presentation: here

Abstract:
Although observed in the 0 + → 0 + transition, the measurement for the two photon decay has not been accomplished in the situation of varying energy states. In this thesis, I develop upon the proceeding to prepare and develop the experimental procedures in order to measure the two photon decay. The end results demonstrate that, in order to obtain high quality and accurate results, the two photon decay will be observed using a 137 Cs source. The detector array will consist of 10 LaBr3 detectors paired in groups of two, centered around the source with a lead shield placed between each detector.

To see the other talks that will be happening, check here weekly on Wednesdays.