On Sun, Dec 04, 2005 at 10:39:37PM -0600, Peter Kammel wrote: > Thanks Steve, > > See my elog:408 (mainly for Fred). > > See you tomorrow. > Hi, Peter, Brendan and I now think that we understand what's going on here. If you have a look at the current trend plot (sample attached), you will see a new set of data points just above the green muSC-muPC1 line. The three top curves are then: Red: muSC (muSC PP) Medium blue: muSC (muSC-muPC1 PP) ** new point ** Green: muSC-muPC1 (muSC-muPC1 PP) Events are lost by the added pileup protection of the muPC, not by a large inefficiency. As the beam rate increases, this effect becomes larger. Also, as the high voltage is increased, the muPC becomes more sensitive to electrons, so more events are lost to pileup protection. -- Fred -- Fred Gray / Visiting Postdoctoral Researcher -- -- Department of Physics / University of California, Berkeley -- -- fegray@berkeley.edu / phone 510-642-2438 / fax 510-642-9811 --
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