update on ecal status
DESCRIPTION
Irina Machikhiliyan , 22.06.2011. Update on ECAL status. Irina Machikhiliyan , 22.06.2011. New reference point: fill 1799. Average relative PmToPin change with respect to 1 st run (fill 1755). Red: physics runs Black: the rest. 1855 7/6/11. 1755 2/5/11. - PowerPoint PPT PresentationTRANSCRIPT
Update on ECAL status
Irina Machikhiliyan, 22.06.2011
New reference point: fill 1799
17552/5/11
18557/6/11
Time, minutes.One point per run
Red: physics runsBlack: the rest
Average relative PmToPin change with respect to 1st run (fill 1755)
Fill 1799 –start of more-or-less regular physics data
taking after series of MD/tech. stops.
Will be used as reference for later fills
Irina Machikhiliyan, 22.06.2011
Fills 1799 - 1883Time, minutes.One point per run
Average relative PmToPin change with respect to 1st run (fill 1799)
#92035 1799
21/5/11
#939951883
21/6/11FILL 1883: only several first runs
Irina Machikhiliyan, 22.06.2011
Time, minutes.One point per run
Red: physics runsBlack: the rest
Fills 1799 – 1883, Inner
Average relative PmToPin change with respect to 1st run (fill 1799)
#93995 1883
21/6/11
Irina Machikhiliyan, 22.06.2011
#92035 1799
21/5/11
Time, minutes.One point per run
Red: physics runsBlack: the rest
Fills 1799 – 1883, Middle
Average relative PmToPin change with respect to 1st run (fill 1799)
#93995 1883
21/6/11
Irina Machikhiliyan, 22.06.2011
#92035 1799
21/5/11
Time, minutes.One point per run
Red: physics runsBlack: the rest
Fills 1799 – 1883, Outer
Average relative PmToPin change with respect to 1st run (fill 1799)
#93995 1883
21/6/11
Irina Machikhiliyan, 22.06.2011
#92035 1799
21/5/11
Time, minutes.One point per run
Red: physics runsBlack: the rest
run #93995 (fill 1855) wrt run #92035(fill 1799)
PmToPin(93995) /PmToPin(92035)
PmToPin(93995)/PmToPin(92035),Inner: mean 0.943 rms 2.9%
PmToPin(93995) /PmToPin(92035),Middle: mean 0.962 rms 3.7%
PmToPin(93995) /PmToPin(92035),Outer: mean 0.959 rms 3.3%
PmToPin(93995) /PmToPin(92035),All: mean 0.956 rms 3.5%
Signal change per fill vs Lumi fills 1748-1875
Red / blue entries: addition to plot shown 25/05 (fills 1805-1875)
Fill 1868
Irina Machikhiliyan, 22.06.2011
Fill 1871Fill 1867
Fill 1867: L=8803 nb-1; LastToFirst=0.994Fill 1868: L=17967 nb-1; LastToFirst=0.989Fill 1871: L=8911 nb-1; LastToFirst=0.991
Signal change per fill vs Lumi, fills 1748-1875 (cont)
Inner: up to 1.6% Middle: up to 1.%
Outer: up to 0.9%Irina Machikhiliyan, 22.06.2011
Gradual decrease of average PMT/PIN with respect to the reference point (up to 6.5% in case of Inner section, 5% in average for the whole detector). It seems that the typical period between two consecutive fills is too short for the noticeable recuperation.
Main contribution comes from the rad. damage of Monitoring system fibers (at least in the Outer section)
Signal relative change over the fill seems depending on delivered luminosity (not the duration of the fill), up to
1.6% change at present conditions (Inner section), 1.1% in average for the whole detector.
Impressions: fills 1799 - 1883
Irina Machikhiliyan, 22.06.2011
<Q>vs R
Net charge through PMTs according to the integrators,1 Mar – 21 Jun
Black: C, topRed: C, bottomGreen A, topBlue: A, bottomQ vs R
R, cmR, cm
Location of integrators on ECAL surface, ¼ of ECAL
Irina Machikhiliyan, 22.06.2011
Consumptions from MV,22 Mar – 21 Jun
C-side A-side
Looks like further decrease of net consumption
I, A I, A
t, sec t, sec
Irina Machikhiliyan, 22.06.2011
Two measurements of MV consumptions individually per each half of the detector section (no beam, no LED flashing):
1 Jun 5 Jun C-side A-side C-side A-side Inner 0.3097A 0.309A 0.3072A 0.3063A Middle 0.3238A 0.323A 0.3238A 0.3234A Outer 0.5285A 0.5299A 0.5288A 0.5301 A
Only Inner section seems to be affected [?for a moment?], measurements are to be repeated on the regular basis
Overall consumption from MV (no beam, no LED flashing): 1.1599 A / side (5 Jun) instead of 1.186 A / side (beginning of 2011)
Individual consumptions for sections
Irina Machikhiliyan, 22.06.2011
Irina Machikhiliyan, 22.06.2011
First measurement: 30 Apr, CALO logbook entry http://lblogbook.cern.ch/CALO/1577
Second measurement: 1 Jun, CALO logbook entry http://lblogbook.cern.ch/CALO/1623
Consumption per C-W, via small groups of cells, various location on detector
Irina Machikhiliyan, 22.06.2011
Central Inner cells: systematic shift down. Black and red dots: 30 Apr, green and blue: 1 Jun, line: fit over 3 first points. The dependencies are still linear.
Outer cells: consumptions did not change at all
C-side A-side
Consumption per C-W, via small groups of cells, various location on detector (cont)
Connector #1 (crate 14/slot08) <f> = 64.8 kHz Connector #2 (crate 13 /slot18) <f> = 65.5 kHz Connector #3 (crate 08/ slot18) <f> = 68.94 kHz Connector #4 (crate 09/slot09) <f> = 68.97 kHz
Next steps Check regularly the values of MV-consumption for each half of the
section Next tech. stop: re-measure C-W pumping frequencies (initial
measurement – 10 May, see logbook entry http://lblogbook.cern.ch/CALO/1587)
Irina Machikhiliyan, 22.06.2011