Woodruff School of Mechanical Engineering

NRE/MP Seminar

Nuclear & Radiological Engineering and Medical Physics Programs


Parameterization of Mis-steered Electron Beams for SLAC's Linac Coherent Light Source (LCLS)

High Activity-Active Well Coincidence Counter Monte Carlo Verification Analysis


Ted Liang and Spencer Mickum


GT-NRE/MP Programs


Thursday, September 13, 2012 at 11:00:00 AM


Boggs Building, Room 3-47


Dr. Hertel


Ted's Abstract: In a linear accelerator such as ones found at SLAC National Accelerator Laboratory, numerous magnets guide an electron beam down a path within a beam pipe. However, there is a chance for the beam to be mis-steered by small angle. The mis-steered electron beam will interact with the beam pipe and other objects along its trajectory and can damage or even burn through these objects. Knowing the beam size and power of this mis-steered electron beam can help SLAC engineers design safety features to shut down the accelerator in such a situation.

Spencer's Abstract: The High Activity-Active Well Coincidence Counter was selected for the non-destructive measurement of the HEU residue leftover after the molybdenum separation process because of its high reliability, low maintenance, compact design, low cost, and ability to work under high exposure rates. MCNP modeling of the system response has been done for different amounts of HEU to demonstrate proper operation and to serve as benchmarks for sample measurements. Microsoft Excel macros written in VBA produce a selection of MCNP input files allowing for a discretized approach to examining minute changes in the system.


Ted's Bio: Ted Liang enrolled in the George W. Woodruff School of Nuclear and Radiological Engineering at Georgia Tech in fall 2008. His research interests are in health physics and related fields such as radiation shielding, detection, and dosimetry.Under Dr. Hertelís guidance, he has had the opportunity to pursue his interests both at his home institution and away at other locations. Ted received his B.S. degree in nuclear and radiological engineering in 2011 and plans to continue his studies by pursuing a Ph.D. in the same major at Georgia Tech.

Spencer's Bio: Spencer Mickum joined the school of Nuclear Engineering at Georgia Institute of Technology in August 2010. He previously received his Bachelorís Degree in Nuclear Engineering from Texas A&M University. His expertise is in nuclear detection, nonproliferation, and nuclear safeguards, with courses taken or research in radiochemistry, advanced nuclear fuels, nuclear reactors, and secondary systems heat transfer as well. Mr. Mickum is currently working on novel neutron detectors for homeland security applications.