1 / 16

Update on ECAL status

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.

hoshi
Download Presentation

Update on ECAL status

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Irina Machikhiliyan, 22.06.2011 Update on ECAL status

  2. Irina Machikhiliyan, 22.06.2011 New reference point: fill 1799 Average relative PmToPin change with respect to 1st run (fill 1755) Red: physics runs Black: the rest 1855 7/6/11 1755 2/5/11 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 Time, minutes. One point per run

  3. Irina Machikhiliyan, 22.06.2011 Fills 1799 - 1883 Average relative PmToPin change with respect to 1st run (fill 1799) Time, minutes. One point per run Time, minutes. One point per run #92035 1799 21/5/11 #93995 1883 21/6/11 FILL 1883: only several first runs Red: physics runs Black: the rest

  4. Irina Machikhiliyan, 22.06.2011 Fills 1799 – 1883, Inner Average relative PmToPin change with respect to 1st run (fill 1799) Time, minutes. One point per run #92035 1799 21/5/11 #93995 1883 21/6/11 Red: physics runs Black: the rest

  5. Irina Machikhiliyan, 22.06.2011 Fills 1799 – 1883, Middle Average relative PmToPin change with respect to 1st run (fill 1799) Time, minutes. One point per run #92035 1799 21/5/11 #93995 1883 21/6/11 Red: physics runs Black: the rest

  6. Irina Machikhiliyan, 22.06.2011 Fills 1799 – 1883, Outer Average relative PmToPin change with respect to 1st run (fill 1799) Time, minutes. One point per run #92035 1799 21/5/11 #93995 1883 21/6/11 Red: physics runs Black: the rest

  7. PmToPin(93995) /PmToPin(92035), All: mean 0.956 rms 3.5% PmToPin(93995) /PmToPin(92035) PmToPin(93995)/PmToPin(92035), Inner: mean 0.943 rms 2.9% run #93995 (fill 1855) wrt run #92035(fill 1799) PmToPin(93995) /PmToPin(92035), Outer: mean 0.959 rms 3.3% PmToPin(93995) /PmToPin(92035), Middle: mean 0.962 rms 3.7%

  8. Irina Machikhiliyan, 22.06.2011 Signal change per fill vsLumi fills 1748-1875 Fill 1868 Fill 1867 Fill 1871 Red / blueentries:addition to plot shown 25/05 (fills 1805-1875) Fill 1867: L=8803 nb-1; LastToFirst=0.994 Fill 1868: L=17967 nb-1; LastToFirst=0.989 Fill 1871: L=8911 nb-1; LastToFirst=0.991

  9. Irina Machikhiliyan, 22.06.2011 Signal change per fill vsLumi, fills 1748-1875 (cont) Inner: up to 1.6% Middle: up to 1.% Outer: up to 0.9%

  10. Irina Machikhiliyan, 22.06.2011 Impressions: fills 1799 - 1883 • 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.

  11. Irina Machikhiliyan, 22.06.2011 Location of integrators on ECAL surface, ¼ of ECAL Net charge through PMTs according to the integrators,1 Mar – 21 Jun Black: C, top Red: C, bottom Green A, top Blue: A, bottom Q vs R <Q>vs R R, cm R, cm

  12. Irina Machikhiliyan, 22.06.2011 Consumptions from MV,22 Mar – 21 Jun Looks like further decrease of net consumption I, A I, A t, sec t, sec C-side A-side

  13. Irina Machikhiliyan, 22.06.2011 Individual consumptions for sections 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)

  14. Consumption per C-W, via small groups of cells, various location on detector 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

  15. Consumption per C-W, via small groups of cells, various location on detector (cont) 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

  16. Irina Machikhiliyan, 22.06.2011 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) 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

More Related