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Collaboration Meeting CERN, 6-10 Feb 2012 Collaboration Meeting CERN, 6-10 Feb 2012 Agustín Sánchez Losa IFIC (CSIC – Universitat de València)

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Presentation on theme: "Collaboration Meeting CERN, 6-10 Feb 2012 Collaboration Meeting CERN, 6-10 Feb 2012 Agustín Sánchez Losa IFIC (CSIC – Universitat de València)"— Presentation transcript:

1 Collaboration Meeting CERN, 6-10 Feb 2012 Collaboration Meeting CERN, 6-10 Feb 2012 Agustín Sánchez Losa IFIC (CSIC – Universitat de València)

2 Outline Reminder of the time calibration with OBs Time calibrations performed since Moscow meeting – Intraline calibration: T0s #9 (after HV Jun’11) #10 (after HV Dec’11) LED-OB 1263 (L09F21): Chronicle of a Death Foretold – Interline calibration: Time offsets #8 (after L6 & L9 reconnection and HV Nov’10) #9 (after HV Jun’11) To-Do List 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting2

3 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting3 Time calibration recipe: – Flash various OMs at the same time by an OB – Plot the distribution of hit arrival times for each ARS – Fit such distribution with a function – Determine T peak, the time of the function peak – Plot T peak vs distance – Deviations from the straight line fit will be used as corrections to the T0s Time calibration recipe: – Flash various OMs at the same time by an OB – Plot the distribution of hit arrival times for each ARS – Fit such distribution with a function – Determine T peak, the time of the function peak – Plot T peak vs distance – Deviations from the straight line fit will be used as corrections to the T0s Reminder of the time calibration

4 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting4 Reminder of the time calibration T 0 in the same line LED OB Early-photon region T 0 in the same line LED OB Early-photon region Intraline calibration time offsets between lines Laser OB Photo-electron level region time offsets between lines Laser OB Photo-electron level region Interline calibration

5 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Scheme of the automatic calibration: – Human intervention needed at the end of the process to check the output and the most problematic corrections in case of T0s calibration run file & calibration (time & alignment) Fill time OB-OM histograms T peak T0s Time offsets Processing run Autobinning Intraline Interline Reminder of the time calibration 5

6 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting T0s in the same line by means of the LED OBs 6

7 7 T0s #1 5 Lines #2 10 Lines #3 12 Lines #4 HV #5 #6 L10-L12+offsets G/2G/4 #7 HV #8 L6-L9+HV #9 HV #10 HV 29/Jan/200707/Dec/200730/May/200813/Aug/200907/Nov/200913/Nov/200922/Jun/201023/Jun/201013/Jul/201006/Nov/201029/Jun/201112/Dec/2011 ~10 months~7 months~15,5 months~3 months~5 days~8 months--~4,5 months~7 months~8 months~4,5 months (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (mix PACO-AART) (mix PACO-AART) (mix PACO-AART) (mix PACO-AART) (#6) (#6) (#7) (#7) (#7) (#8pre) (BAD PATCHED) (PATCHED) (PATCHED) 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Two new Intraline calibrations (T0s without offsets): – #9 (after HV Jun’11) – #10 (after HV Dec’11) #1 #2 #3 #5 #4 #6 #7 #8 5 Lines 10 Lines 12 Lines HV L10-L12+offsets HV L6-L9+HV G/N HV #9 #10

8 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Intraline calibration performed with: – 24 standard LED-OB calibration runs of 29/06/2011 – “2011:V1.0” online calibration LED-OBs not available: L09S21, L10S21, L11S02, L11S21, L12S15 More info available at: 8

9 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Corrections summary: – 526 ARSs couldn't be corrected (no data or dead channel) – 8 ARSs couldn't be corrected (not suitable for time calibration) – 1236 ARSs were corrected: (70%) 1023 less than 1ns (83% of corrected) 141 between 1ns and 2ns (11% of corrected) 60 between 2ns and 5ns (5% of corrected) 12 more than 5ns (1% of corrected) – And 30 ARSs are in a pair corrected more than 1ns: (2% of corrected) 26 less than 2ns 4 between 2ns and 5ns 0 more than 5ns – 6 were fitted and corrected by hand (0.4%) 9

10 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting 8 ARS were not corrected: they are not suitable for time calibration 10 (L03 F14 ARS2) (L03 F14 ARS3) L07 F13 ARS4 (L07 F13 ARS5) (L11 F11 ARS4) (L11 F11 ARS5) time (ns) N N N L08 F15 ARS1 L07 F17 ARS4

11 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting11 Section 2 Floor (11-17) Section 2 Floor (11-17) Section 1 Floor 4-10 Section 1 Floor 4-10 Section 3 Floor (17-23) Section 3 Floor (17-23) Section 4 Floor Section 4 Floor #9

12 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting 72 out of 1236 have required corrections larger than 2ns: 6 % 72 out of 1236 have required corrections larger than 2ns: 6 % Clockphases stable below ~0.1ns #9 12

13 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Intraline calibration performed with: – 24 standard LED-OB calibration runs of 16/01/2012 – “2011:V4.0” online calibration LED-OBs not available: L09S21, L10S21, L11S02, L11S21, L12S15 More info available at: 13

14 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Corrections summary: – 516 ARSs couldn't be corrected (no data or dead channel) – 9 ARSs couldn't be corrected (not suitable for time calibration) – 1245 ARSs were corrected: (70%) 1094 less than 1ns (88% of corrected) 105 between 1ns and 2ns (8% of corrected) 38 between 2ns and 5ns (3% of corrected) 8 more than 5ns (1% of corrected) – And 20 ARSs are in a pair corrected more than 1ns: (2% of corrected) 14 less than 2ns 6 between 2ns and 5ns 0 more than 5ns – 7 were fitted and corrected by hand (0.4%) 14

15 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting 8 ARS were not corrected: they are not suitable for time calibration 15 L02 F10 ARS2 (L02 F10 ARS3) (L03 F14 ARS2) (L03 F14 ARS3) (L07 F13 ARS4) (L07 F13 ARS5) time (ns) N N L11 F11 ARS4 Unbalanced section #4 of line 5

16 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting16 Section 2 Floor (11-17) Section 2 Floor (11-17) Section 1 Floor 4-10 Section 1 Floor 4-10 Section 3 Floor (17-23) Section 3 Floor (17-23) Section 4 Floor Section 4 Floor #10

17 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting 46 out of 1245 have required corrections larger than 2ns: 4 % 46 out of 1245 have required corrections larger than 2ns: 4 % Clockphases stable below ~0.1ns #10 17

18 L09F21 LED-OB was a noisy OB: the trigger in OB PMT was given by clock signal noise (thanks Paco and Ciro) flash time was given ~75ns before it should “time difference signal” shifted close to the end of the time window Decided to add -75ns to the OB t0 for practical reasons ADC ~ 48ch ( ~ 75ns) ADC ~ 48ch ( ~ 75ns) time (ch) V (ch) MAX_TRIG_TH0 ~ 255mV → ADC ~ 186ch time (ns) N CERN’11 15/12/ Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting18 L09 S23 ARS0

19 15/12/2010 time (ns) N 01/02/2011 time (ns) N 07/02/2011 time (ns) N 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting19 -75ns L09 S23 ARS0 time (ns) N 29/06/2011 time (ns) N +75ns -75ns 16/01/2012

20 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Time offsets between lines by means of the Laser OB 20

21 21 T0s #1 5 Lines #2 10 Lines #3 12 Lines #4 HV #5 #6 L10-L12+offsets G/2G/4 #7 HV #8 L6-L9+HV #9 HV #10 HV 29/Jan/200707/Dec/200730/May/200813/Aug/200907/Nov/200913/Nov/200922/Jun/201023/Jun/201013/Jul/201006/Nov/201029/Jun/201112/Dec/2011 ~10 months~7 months~15,5 months~3 months~5 days~8 months--~4,5 months~7 months~8 months~4,5 months (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (NO OFFSETS) (mix PACO-AART) (mix PACO-AART) (mix PACO-AART) (mix PACO-AART) (#6) (#6) (#7) (#7) (#7) (#8pre) (#9) (BAD PATCHED) (#8) (PATCHED) (PATCHED) 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting Two new Interline calibration (time offsets between lines): – #8 (after L6 & L9 reconnection and HV Nov’10) and #9 (after HV Jun’11) – Completed all the periods until end 2011! #1 #2 #3 #5 #4 #6 #7 #8 5 Lines 10 Lines 12 Lines HV L10-L12+offsets HV L6-L9+HV G/N HV #9 #10

22 Lines #2 10 Lines #3 12 Lines #4 HV #5 #6 L10-L12+offsets #7 HV #8 L6+L9+HV #9 HV 07/Dec/0730/May/0813/Aug/0907/Nov/0913/Nov/0913/Jul/1006/Nov/1029/Jun/11 #2#3A#3B#3C#4- #6 (DIRTY) #6#7#8pre#8#9 12 runs (25/02/08 → 12/05/08) 1 run (02/06/08) 10 runs (09/09/08 → 22/12/08) 29 runs (23/12/08 → 12/08/09) 10 runs (01/09/09 → 02/11/09) - 26 runs (11/12/09 → 12/07/10) 13 runs (11/12/09 → 08/03/10) 14 runs (19/07/10 → 25/10/10) 4 runs (24/11/10 → 27/12/10) 26 runs (24/11/10 → 03/06/11) 25 runs (19/06/11 → 12/12/11) PACO (0.992) auto (0.992) auto (0.994) Not Done PACO (0.992) AART (0.992) AVERAGE Paco-Aart auto (0.992) auto (0.994) DIFF ( ) auto - 1-2,1 -1,5--3,0-2,28-2,83-3,0 0,0-3,0-2,9--2,7 -3,0-2,3-2,4-2,6 2-1,9-2,1-1,9--2,6-2,12-2,55-2,6 0,0-2,6-2,8--2,9-3,0 -2,9 -3,0 30,80,50,9-0,3-0,63-0,360,1 0,0-0,30,1- 0,30,5 0, ,7-2,56-2,32-1,4-1,5-0,1-1,6-1,7--1,5-1,6-2,1 -2,0 5-2,4-2,2 --3,6-3,31-3,65-3,5 0,0-3,5 --4,0 -3,4-3,2 -3,4 6-0,9 -0,8--0,1-1,10-0,79-0,5 0,0-0,30, ,6-0,3 7-0,2-0,30,1--0,20,33-0,13-0,4 0,0-0,5-0,8--0,7 -0,3-0,5-0,1 87,17,57,6-7,55,336,227,87,90,17,97,2-8,18,07,86,86,97,0 91,00,80,9-0, ,020,0 0, ,8 -1,0 10-1,6-1,3-1,2--0,8-1,00-0,09-0,9-0,70,2----1,3-1,2-0,5-0,3 -0, ,43,974,495,23,5-1,73,64,3-3,94,04,13,94,14, ,13,313,013,00,7-2,30,4--1,1 0,31,20,91,0 Mean -0,02-0,010,21-0,38-0,010,080,320,00-0,320,030,02-0,010,00-0,02-0,01 0, Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting22

23 #7 #8 # Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting23

24 Line 1 Line 2 Example of interline (from 03/11/2010 to 20/06/2011) # Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting24

25 Line 1 Line 2 Example of interline (from 29/06/2011 to 12/12/2011) # Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting25

26 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting26 Official offset Validity period Laser average ±1ns Laser offset period Laser offset RMS

27 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting27

28 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting28

29 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting29

30 6-10 Feb 2012Agustín Sánchez Losa – CERN Collaboration Meeting To-Do List Intraline calibration by OB: – Compute intermediate T0s, starting for the ones from 2011 – Recompute old T0s with updated TVCs and study the impact of using ones or another – Research & Improvement on intraline calibration: Calibrate the first floors of each line, study the impact of a calibration with independent sections, Study unstable PMTs since HV tuning in Summer'10, etc. Interline calibration by OB: – Research & Improvement on interline calibration: Keep studying time offsets evolution along long periods, use LED-Beacons as a standard cross- check for the time offsets, impact of the noise in the line offset measurements, etc. 30

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