December 2, 2005
Assume that light yield in station 4 remains at between 5 and 7.5 p.e. Assumption to be checked with analysis at the next Tracker meeting. Then, need to investigate light loss. The following is the result of a discussion at IC between AB, ME, and KL. Please amend and comment, we should discuss it at the next Tracker phone call and then take action. If Paul Kyberd's QA set is ready we could use it to do the station check and some of the other fibre checks. Source of Proposed action Who/where light loss Mirror damage Shine light into fibre at station IC connector end. Look for light going through mirror by eye or with CCD camera. Scintillating In software check responce channel Malcolm, fibre damage by channel and response vs distance Hideyuki, ... along fibre. Station Manufacture new connector set IC connector and measure light transmission at FNAL connector Once analysis has identified the worst Malcolm/Hideyuki connector, remove it and test with wave IC/FNAL guide. Clear fibre Illuminate waveguides, quantify light IC transmission. Send worst light guide to FNAL for cut-back test. FNAL Patch-panel Manufacture new connector set IC connector and measure light transmission at FNAL connector
See below for connection details.
|Yagmur Torun||December 6, 2005|