1. Department of Electrical Engineering and Computer Science, Alabama A&M University, Normal, AL, USA
2. NASA Marshall Space Flight Center, Huntsville, AL, USA
3. Center for Irradiation of Materials (CIM), Alabama A&M University, Normal, AL, USA
4. Cygnus Scientific Services, Huntsville, AL, USA
5. Department of Physics, Alabama A&M University, Normal, AL, USA
6. Department of Chemistry and Physics, Fayetteville State University, Fayetteville, NC, USA