The minutes of the users committee meeting of feb 10 contain errors about the plans of ChAOS. The original plan was to remove ChAOS from the 3.5 meter and ship it back to Chiaco to refurbish it and incorporate the IR instrument which is under construction. THe laser would be moved from the telescope at the same time to make way for the Echelle. We planned to get the laser operation and move it to Sac Peak where we could optimize its operation for astronomy during the summer. The intension was to return both sub-systems to the 3.5 m in the fall where they would be integrated.This approach seemed to us the most efficient use of everyone resources There were no plans to move it to a smaller telescope. Since this action was proposed we learnt that our NSF proposal ($800K over two years) was turned down. I enclose a copy of the comments of the reviewing panel since there are clearly issues which may have to be addressed by ARC. It should be noted that we give only minimal support to continued development of deformable mirrors or the WCE under the NSF grant and are fully committed to making ChAOS work on the 3.5 meter telescope. We were able to continue support of ChAOS last year from carry over money. There is no money left. We will attempt to fund the laser beacon experiments and observing runs through April. After that ChAOS is dead. There are no plans to return it to the 3.5 meter in the forseeable future. I'm really p*ssed off. Ed Kibblewhite PANEL SUMMARY OF NSF PROPOSAL "This proposal aims to provide continued support for the University of Chicago adaptive optics program which includes a number of diverse efforts: improving the tip-tilt system to remove high frequency telescope oscillation, commissioning the Chaos with a sodium laser guide star,improving the optical projection system for the laser guide star, completing an IR camera system which will be used with Chaos, supporting WCE experiments at Yerkes Observatory, and supporting algorithm development for wavefront reconstructors.The effort to date has resulted in the successful operation of the WCE and closed-loop operation of Chaos with natuiral stars. The main strengths of Kibblewhite's proposal lie in the delivery and initial operation of a complex experimental laser to produce laser guide stars in the sodium layer and the commissioning of the basic Chaos adaptive optics components (only with natural stars). Success has also been demonstrated in the operation of WCE and in algorithm developmenmt for reconstructors, but these are of secondray importance relative to the primary goal of making the Chaos system work at the ARC telescope. The panel finds the following weaknesses in Kibblewhite's proposal. First, there is a fundemental problem with the ARC telescope, namely 20Hz and 45 Hz oscillations of the telecope secondary structure. Instead of solving this problem with the Chaos tip-tilt system, the ARC Consortium should address the basic problem with the telescope structure. The panel believes that the ARC consortium should commit itself to this goal if it aims to benefit from NSF funding for laser guided adaptive optics work. Second, it is crucial for the PI to keep the primary focus of work on the most important goal:to make Chaos work with a laser guide stas. This may mean reducing the effort spent on secondary projects which might include WCE, building deformable mirrors in-house (which could be purchased from commercial vendors), and an alternate strategy of having ARC provide a facility IR camera-spectrograph, and building aircraft avoidance systems. The panel sees great potential in the Chaos effort if these fundemental problems are addressed. The panel has no substantive comments on the budget in view of the more fundeamental difficulties noted above." APO APO APO APO APO Apache Point Observatory 3.5m APO APO APO APO APO This is message 128 in the apo35-general archive. You can find APO the archive on http://www.astro.princeton.edu/APO/apo35-general/INDEX.html APO To join/leave the list, send mail to apo35-request@astro.princeton.edu APO To post a message, mail it to apo35-general@astro.princeton.edu APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO APO