I believe that we are seeing here one of the unfortunate consequences of incorporating ACDs and upgrade scenarios into the BCD and subjecting them to the same level of change control. I have yet to read the material itself, but nowhere in Andrei's cover letter is there any suggestion that the maintenance of the option of a future upgrade to gamma-gamma has any impact on the baseline design. I therefore propose, unless there are cost/schedule/technical performance issues for the baseline in what Andrei proposes, that the correct classification of this request is Class 0.
Dear Colleagues, I am announcing that CCB has received a change request for the BDS section of ILC Baseline Config Doc from A.Seryi who is representing the BDS AG. This change request relates to a likely scenario for the gamma-gamma upgrade of the BDS and IR to thoroughly examine in the timescale beyond RDR. The requesters suggest Class 1 as classification for this change request. The CCB chair concurs, so it will be treated as Class 1. I have asked G.Blair and T.Markiewicz to act as CCB reviewers (to be confirmed shortly). Now this request is brought to review by CCB, and is also open to general discussion. Any members of GDE or GDE-related task groups with comments or questions on this request, please, direct them to ml-ccb@xxxxxxxxxxxx and/or ml-ext-gde@xxxxxxxxxxxx by the end of Friday, May 19, PDT. BCD is available at http://www.linearcollider.org/wiki/doku.php?id=bcd:bcd_home BCD change history is available at http://www.linearcollider.org/wiki/doku.php?id=bcd:bcd_history BDS-related RDR materials are compiled and posted at http://www-project.slac.stanford.edu/ilc/acceldev/beamdelivery/rdr/ Sincerely, - Nobu Toge (KEK, Accelerator Lab) email: toge@xxxxxxxxxxxx voice: +81-29-864-5224 fax: +81-29-864-3182
-- L. Warren Funk Accelerator Division Jefferson Lab 12000 Jefferson Ave. Bldg. 12, Rm. C-221, MS-12A2 Newport News, VA 23606 Phone: 757-269-7690 Fax: 757-269-6099 email: lwfunk@xxxxxxxx