TF ResearchInterests
Research Interests
My research pursues understanding the structure of a nucleon, a proton or neutron, using polarized electron probes. My work is based at the Thomas Jefferson National Accelerator Facility (JLab), a Department of Energy lab located in Newport News, Va. Specifically, I am currently involved in measuring the ratio of polarized to unpolarized quarks in the nucleon as a means to discriminate between models of the nucleon and a calculation from perturbative Quantum Chromodynamics. I am also leading a measurement of a new fundamental coupling constant () which determines the strength of the weak forces ability to excite a nucleon to its first excited state. A key ingredient to the pursuit of the above measurements involves the design, construction, and testing of detectors used in nuclear physics experiment. My students will be exposed to the art of experimental measurement as well as perform the measurements listed above.
Projects
CLAS 12 R1 Construction
The Idaho Accelerator Center and ISU's Department of Physics are building detectors for an upgrade of Jefferson Lab's Hall B. The detectors are wire chambers containing approximately 5,000, 30 micron diameter wires that are used to form gaseous cells which can detect the passage of ionizing particles. The 2 year long project will construct detectors that are about 6 feet high and will eventually be installed at Jefferson Lab in Newport News, Va. The detectors will be part of a larger detector that will be used by a group of more than 100 physicists to perform fundamental nuclear physics measurements.
GEM detectors
