Hall D Tagging Spectrometer and Photon Beamline Review Charge

January 23-24, 2006

The scope of this review is the Hall D coherent bremsstrahlung beamline, including the photon tagging system. You are asked to address the following questions:

1. Is the conceptual design of the tagger magnet and hodoscope systems reasonable and

adequate to achieve the Hall D physics goals?

2. Have the design parameters of the complete photon beamline been optimized for maximum

physics impact? For example, will this design achieve maximal linear polarization up to the

highest envisioned rates? Are the beamline diagnostics adequate?

3. Are the specifications for the incident electron beam sufficiently well-defined, reasonable,

and consistent with achieving the Hall D physics goals?

Please note that the Hall D detector, electronics, and data acquisition systems have been reviewed previously and these are therefore not the focus of this review. You will be supplied with the reports from these earlier reviews along with your briefing materials.