1. 1 29 th March 2007 C.P. Ward Pat Ward University of Cambridge Status of Far Detector Linearity Calibrations

2. 2 29 th March 2007 C.P. Ward History Original 20-point Gain Curves had too few points in linear region Feb 06: 60-point GC used to make first set of FD linearity calibrations July 06: start of regular 40-point GC Second set of calibrations made from July 06 GC (in September 06) This week: have added calibrations from Aug 06 and Sep 06 GC to offline database

3. 3 29 th March 2007 C.P. Ward Constants in Offline Database TimeStartInsertDateGainCurve# points 1970-01-012006-04-03Feb 0660 2006-07-072006-09-21Jul 0640 2006-08-042007-03-27Aug 0640 2006-09-012007-03-28Sep 0640 All have TimeEnd = 2038-01-01

4. 4 29 th March 2007 C.P. Ward Stability:Jul06 – Sep 06 88% channels good fits both times and adcmax>12000 Ratio of corrections at ADC=12000: mean = 1.003 sigma = 0.051 Bay 11 rack 4 tube 2; Hardware change??

5. 5 29 th March 2007 C.P. Ward Have asked Howie to process remaining data – not yet done Code in cvs: PulserCalibration/PulserGainFit PulserCalibration/macros/write_calpulserfits.C Write-up: MINOS-doc-1886 I will have to pass this on to Ryan now – good luck!