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To-do:
Frank and I examined the room. The SAO group looked at it a few months ago and thought it was OK, although it looks a little small to me. Frank says that utilities can be brought into the room. It isn't heated and gets cold during the winter. Space heaters can be brought in for human comfort (the room is insulated so it's probably not a problem for the telescope). The floor is painted and the walls have semi-gloss paint so particulate contamination from the environment is probably not a problem, except that the door can open to a dirtier environment.
The area to the left of the instrument prep room is intended for storage. In fact, it's being used for that now. Frank expects that after the construction crew leaves, most of that stuff can be put somewhere else and instruments can be stored there.
The area is open to the elements at times and instruments ought to be stored under custom-cut tarps to keep humidity and dust out.
Frank suggests using lockpins similar to those on the IMACS rotator. These will disable the telescope motion and the local rotator. Do we need a real ESTOP button at the Cass position?
Can't really look inside with the tertiary mirror in place, but Frank suggests building a new shroud to replace the existing one, making the installtation of the WFC easier as well. The problem is that we don't know how centered the 24 1/4-20 screws at the top are (where we planned to mount the primary baffle and the WFC) and 1/4-20 screws really aren't right for this either.
Can't do this. We're going to have to rely on the drawings for now, and perhaps do this when we next aluminize.
This was met with enthusiastic agreement.
Many have been sent back to Pasadena for inspection. There are many failure modes and it's not clear what the real problem is. Sounds like there is some fault in the wiring integrity, but there's probably more to it than that. Mycoms are used everywhere else, so maybe that's the way to go.
Not much discussion here.
10% Dow-therm with D.I. water. There's a different mix for the telescope cooling system; this is the instrument loop mix.
Didn't really do much of this, except for hearing that all the information that SAO requested has been delivered.
Didn't do this before he left; should probably ask Skip.
See above, about the thought of building a new part here.
Forgot to talk about this.
Frank has a better idea, which is to plumb in the shop compressor to the instrument locations. Need a coagulator, dryer, and particulate filter.
Spent an afternoon and evening with Jose, who gave me the full tour of the system. It looks simple enough (C++ and Fortran under DOS) and Jose has organized things to be consistent, although he noted at he telescope that in the end many of the "identical" systems are different because people put different things on the different telescopes. Tip-tilt, for example.
He also mentioned that he's waiting for cabling to go in so he can install a Racal switch for the guider cameras.
Frank's going to use the shop compressor.
This doesn't work because the big air dryers use a lot every time the pumps cycle; it's not only the mirror support that uses (leaks) air.
He has the previous six months. The operations budget looks pretty much OK, except for the exchange rate problem. Not much is happening in the LCO/Magellan construction budget.
Frank tells me that the motors, etc., are actually part of the ADC lens cells, so only the M3 computer is available. Silvia has a motor so most of the system software can be exercised off the telescope.
ADC update
Cleveland Crystals now reports a February 20, 2004, ship date for the coated ADC (was February 11, 2004; their fixtures are a week late). This allows a delivery to Brashear during the last week of of Februrary. Brashear reports (1/20/04) that they want 2 weeks to install the lenses and 4 weeks to test. That takes us to mid-April for shipping out of Brashear. This makes it arrive at LCO at the end of April, just in time for the May engineering run for installation.
This schedule no longer has contingency for a May engineering run.
F5 secondary mirror
The polishing contract has been signed by Carnegie and is awaiting signatures from U of A. It's been reported that this is progressing and we should have a signed contract soon.
SAO news
AU traveled to Boston in mid-December 2003 and met with Tim Norton, Mark Ordway, and Andy Szentgyorgyi. Much progress was made on the ICD but there is still lots of missing information. We continue to fill in the gaps.
The wide field corrector optics are about one year from completion and SAO anticipates it'll be ready for delivery to LCO in August 2005.
Megacam might arrive as soon as September 2005.
MMIRS might ship from SAO to LCO in June 2007, prep for commissioning during July-August 2007, with a September 14, 2007 installation and checkout on the telescope. It is scheduled to ship to MMT in November 2006. MMIRS does not use the wide field corrector.
A bolt strength analysis submitted by Randy Hammond (JHU/IDG) confirms the initial worries stated by SAO that the existing bolt pattern has marginal strength, but only if low-grade fasteners (SAE 1) are used. Going to SAE grade 8 allows a significant safety margin. Adding shear pins is probably the easiest and best way to completely put us at ease.
MagE news
AU talked with Scott Burles in December 2003. Some of the optics are being coated at LLNL (with the 40-inch secondary mirror). Camera optics, in particular the Schmidt corrector, are still TBD (a two-element design is excellent, but is a single plate good enough?). Mechanical engineering is TBD (we don't know exactly who will do the work yet). Scott has promised to call a meeting of the principals soon.
MMTF news
Sylvain will update me on the schedule and status before I leave. He says that glass has been purchased for the etalon and he has contacted filter vendors for the order blockers.
