1 29th March 2007 C.P. Ward

Pat Ward

University of Cambridge

Status of Far Detector Linearity Calibrations

2 29th 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 29th March 2007 C.P. Ward

Constants in Offline Database

TimeStart InsertDate GainCurve # points

1970-01-01 2006-04-03 Feb 06 60

2006-07-07 2006-09-21 Jul 06 40

2006-08-04 2007-03-27 Aug 06 40

2006-09-01 2007-03-28 Sep 06 40

All have TimeEnd = 2038-01-01

4 29th 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 29th 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!