1. Department of Physics and Astronomy, Stony Brook University, Stony Brook, New York 11794, USA
2. Instrumentation Division, Brookhaven National Laboratory, Upton, New York 11973, USA
3. Collider Accelerator Department, Brookhaven National Laboratory, Upton, New York 11973, USA
4. Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, USA