Date of Award

Spring 2006

Project Type


Program or Major


Degree Name

Doctor of Philosophy

First Advisor

John Calarco


The proton electric to magnetic form factor ratio ( GPE/GPM ) is related to the underlying electromagnetic structure of the proton. GPE/GPM is studied through elastic scattering using a longitudinally polarized electron beam with 0.85 GeV energy, a polarized internal hydrogen gas target and the BLAST detector at the MIT Bates Lab. Beam-target spin asymmetries are measured in several bins of Q2 for both left and right sector of BLAST, the super-ratio of these left/right asymmetries is formed and GPE/GPM is extracted.