1. Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy NY 12180, USA
2. Department of Physics and Nuclear Engineering, United States Military Academy, West Point NY 10996, USA
3. US Army ARDEC – Benét Laboratories, Watervliet NY 12189, USA
4. Department of Physics, University of Dayton, Dayton, OH 45469, USA
5. School of Engineering, Massachusetts Institute of Technology, Cambridge MA 02139, USA
6. Harvard John A. Paulson School of Engineering and Applied Sciences, Cambridge MA 02138, USA