The Ohio State University College of Mathematical & Physical Sciences Department of Astronomy

Attendees: Bruce Atwood, Jerry Mason, Dan Pappalardo, Ralph Belville, Jen Marshall, Darren DePoy, Tom O'Brien, Paul Byard, and Rick Pogge.

Paul is working on the blue camera optical alignment procedure. One good way is to run the cameras backwards, putting a pinhole array in the detector focal plane, back illuminating it, then using the AGW guide camera and optics in the MODS focal plane, with the pickoff mirror turned around, to view this mask through the MODS optics (collimator mirror and an imaging flat in place of the grating).

One question is how to go about analyzing the images taken with the AGW guide camera (e.g., in/out of focus, Newell test, etc.).

Tom reports that Mark has finished the AGW stage, and most parts are either out to bid, or about to be delivered (including all of the optics). We could have all of the AGW system parts (except for the WFS camera system) in 5-6 weeks, and could begin assembly of the first AGW stage system in early 2005.

Tom assembled the blue shutter in the blue camera, learning a number of things about how to actually do the assembly in the process. There is still much to clean up, but basically it fits fine. The next step is to start designing the camera "skin" that will seal off the camera and make it light-tight.

Other bits in progress:

The shop is about to start making the truss rods for the first red camera. We have a few parts for fitting, but not a complete set.

Grating Select Turret #1 is done and in the process of re-assembly and preparation for testing. The shop is producing the weldments for the remaining 3 turrets, and will weld 1 using a modified (better) procedure soon.

The parts for the Calibration System tower are in hand, and are being assembled (Picture [354k JPEG]). The light tube still needs to be done. We have the Integrating Spheres and their light sources and (lab) power supplies (Picture [488k JPEG]). The lenses are still being produced by JML, and hopefully will be delivered in early 2005.