P-shooter's H2 ion plasma source


 Bret Crawford
Physics Department
Gettysburg college
Gettysburg, PA 17325

Tel: 717-337-6054
Fax: 717-337-6027
E-mail: bcrawfor@gettysburg.edu

 

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I teach a variety of physics courses in the Physics Department at Gettysburg College.  I received my Ph.D. in 1997, in experimental nuclear physics from Duke University, where I worked at the Triangle Universities Nuclear Laboratory (TUNL).  My physics interests include parity violation in the compound nucleus, neutron scattering, and using low-energy proton accelerators in the undergraduate laboratory.  If you're interested, here's my CV in pdf.

Courses (Fall 2012)

Physics 211 (Intermediate Physics: Electricity and Magnetism)  -- Syllabus

 

 

Research Projects

Measurement of the parity-violating spin rotation of transversely polarized cold neutrons traveling through liquid helium.  I have been working on some computer simulations for the experiment being performed at the National Institute of Standards and Technology (NIST).  The current experiment is an upgraded version of an earlier measurement from 1996.

Measurement of the neutron-neutron scattering length at the YAGUAR reactor in Snezhinsk, Russia.  I've been working with colleague Sharon Stephenson on numerical calculations of the neutron flux within the reactor.

I have also been working with colleagues, Sharon Stephenson and Pete Pella, and many students over the last several years to bring a 250-keV proton-accelerator laboratory online.  The 1960s era accelerator was generously donated by TUNL. Here's a link to the p+-shooter.

My Ph.D. graduate work involved measurements of parity non-conservation (PNC) asymmetries in resonant neutron cross sections for longitudinally polarized epithermal neutrons incident on Mass-100 and Mass-230 targets.  This work was done by the TRIPLE Collaboration at the Los Alamos National Laboratory

While getting my masters at the University of Vermont, I investigated the transistor patent's of Julius E. Lilienfeld dating from the late 1920s and early 1930s.  Using 1930s laboratory techniques, we built transistor-like devices following Lilienfeld's 1933 patent (#1,900,018).  You can read all about it in my Masters thesis.

 


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