(r5) LHCbCaloDataQuality < LHCb

LHCb Web>LHCbCalo>LHCbCaloDataQuality (revision 5) (raw view)~~EditAttachPDF~~

---+!! <nop> Calorimeter data quality survey

In this page are listed all the hardware problems identified during the analysis of [[LHCbCaloComData][calorimeter data]] (noise, LED or cosmics) <br>


%TOC%
-----
---++ Problematic channels 
---+++ List
The problematic channels listed below have been identified thanks to the analysis of [[https://twiki.cern.ch/twiki/bin/view/LHCb/LHCbCaloComData#Data_02_13_2008_E_HCAL_LED_SCAN][Cosmics and LED data]] taken in february 2008.<br>
Detailed analysis of the data can be found [[http://indico.cern.ch/getFile.py/access?contribId=8&sessionId=1&resId=1&materialId=slides&confId=29142][here]] and [[http://indico.cern.ch/getFile.py/access?contribId=6&sessionId=1&resId=7&materialId=slides&confId=29142][there]].


|  *Calo*  |  *Crate*  |  *FEB*  |  *RO channel*  |  *diagnostic*  |  *Data*  |  *seen*  |  *fixed*  |
| Hcal  |  22  |  10  |  30  |  *dead* |  LED/Cosmics  |  13/02/08  | |
| Hcal  |  23  |    8  |  28  |  *dead*  |  LED/Cosmics  |  13/02/08  | |
| Hcal  |  22  |  13 [PIN]  |  2  |  *dead*  |  LED  |  13/02/08  | |
| Ecal  |    8  |    5  |  29  |  _dead_  |  LED/Cosmics  |  13/02/08  | _20/02/08 PM replaced_   |
| Ecal  |   10  |   0  |  21  |  _dead_  |  LED/Cosmics  |  13/02/08  | _20/02/08 PM replaced_  |
| Ecal  |   11  |   7  |  12  |  _dead_  |  LED/Cosmics  |  13/02/08  | _20/02/08 PM replaced_  |
| Ecal  |   12  |   2  |   1  |  *dead*  |  LED/Cosmics  |  13/02/08  |     |
| Ecal  |  14  |    8  |  6  |  *dead*  |  LED/Cosmics  |  13/02/08  |    |
| Ecal  |    9  |    8  |  31  |  *dead (FEB pb to be fixed)* |  LED/Cosmics  |  13/02/08  |     |
| Ecal  |   14  |    9  |  24  |  _dead_  |  LED/Cosmics  |  13/02/08  | _20/02/08 bad connector_ |
| Ecal  |   12  |  2->11   |   3,11,19,27  |  _low signal_   |  LED/Cosmics  |  13/02/08  |  _20/02/08  power line pb_  |
| Ecal  |   13  |  2->4     |   7,15,23  |  _low signal_  |  LED/Cosmics  |  13/02/08  |  _20/02/08  power line pb_  |
| Ecal  |   14  |  11->13 |   7,15,23  |  _low signal_   |  LED/Cosmics  |  13/02/08  |  _20/02/08  power line pb_  |
| Ecal  |   11  |  8          |   4->7, 12->15, 20->23, 28->31  |   *low signal (bad timing  ?)*  |  LED  |   13/02/08  |    |
| Ecal  |   11  |  9          |   0->3, 8->11, 16->19, 24->27  |  *low signal (bad timing  ?)*  |  LED  | 13/02/08  |   |
| Ecal  |   11  |  7          |   12  |  _hot_  |  Cosmics  |  02/2008  |  _20/02/08 *found dead* - PMT replaced_  |
| Ecal  |   13  |  12        |   9  |  _hot_  |  Cosmics  |  02/2008  |  _20/02/08 *found dead* - PMT replaced_  |
| Ecal  |   14  |  7        |   28  |  _very hot_  |  Cosmics/High trigger rate  |  13/02/08  |  _20/02/08 *found dead* - PMT replaced_  |
| Ecal  |   14  |  8        |   7 & 15 & 23 & 31  |  *very hot*  |  Cosmics/High trigger rate  |  13/02/08  |     |
| Ecal  |   14  |  9        |   13   |  *hot*  |  Cosmics/High trigger rate  |  13/02/08  |     |
| Ecal  |   14  |  9        |   21  |  _hot_  |  Cosmics/High trigger rate  |  13/02/08  |  _20/02/08 *found dead* - PMT replaced_  |
| Hcal  |   22  |  8        |   6-7 & 14-15 & 22-23 & 30-31  |  *hot*  |  Cosmics  |  13/02/08  | |
| Hcal  |   23  |  6        |   31  |  *hot*  |  Cosmics  |  13/02/08  | |
| Hcal  |   23  |  7        |   10 & 18 & 26  |  *hot*  |  Cosmics  | 13/02/08  | |


---+++ Figures 

   * DEAD CHANNELS : Hcal (left) and Ecal (right) LED scan :  ADC (summed over 3 consecutive BX) as a function of FEB and channel<br />
     <img src="%ATTACHURLPATH%/hcal_quality.jpg" alt="hcal_quality.jpg" width='300' height='300' />
     <img src="%ATTACHURLPATH%/ecal_quality.jpg" alt="ecal_quality.jpg" width='300' height='300' />


   * HOT CHANNELS : Hcal (left) and Ecal (right) L0 trigger :  ADC  as a function of FEB and channel<br />
     <img src="%ATTACHURLPATH%/hcal_hot_L0.jpg" alt="hcal_hot_L0.jpg" width='300' height='300' />
     <img src="%ATTACHURLPATH%/ecal_hot_L0.jpg" alt="ecal_hot_L0.jpg" width='300' height='300' />

   * HOT Ecal channels  <br />
     <img src="%ATTACHURLPATH%/hot_ecal_channels.jpg" alt="hot_ecal_channels.jpg" width='500' height='300' />


-----
---++ DAQ problems
---+++ List
   *  problem of transmission with ecTell07  (time to time wrong header and/or  wrong <nop>L0ADC/ADC) <br>
   *  1 uncorrect <nop>L0ADC/ADC observed with ecTell04
   *  problem with FEB#6 in Prs0 (psTell01) :  wrong header with <nop>CrateID/FEBId=0  
   *  problem with 4 FEB in Prs2  (FEB#4,5,6,7) --> faulty PGA of psTell03  ?

---+++ Figures :

   * PRS C-side <br />
     <img src="%ATTACHURLPATH%/prs0123_22Feb08_T0_Prev1-zoom.JPG" alt="prs0123_22Feb08_T0_Prev1-zoom.JPG" width='491' height='366' />
   * <nop>L0ADC/ADC matching <br />
     <img src="%ATTACHURLPATH%/ecal_l0adc.jpg" alt="ecal_l0adc.jpg" width='512' height='384' />

-----
---++ Wrong settings
---+++ List
   * Ecal and Hcal PIN-diode signal  is shifted ~ -2 BX with respect to PMT signal<br>
   * Ecal PIN-diode signal for BOX#5 and BOX#6 additional ~ -2BX delay  (10m cable vs 17m cable)<br>
   * CROC & TELL1 BCIDs not aligned -> production of error banks :   BCID offset to be set <br>




-- Main.OlivierDeschamps - 26 Feb 2008

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who
jpg	ecal_hot_L0.jpg	r1	manage	55.1 K	2008-02-27 - 12:43	OlivierDeschamps
jpg	ecal_l0adc.jpg	r1	manage	26.9 K	2008-02-27 - 12:46	OlivierDeschamps
jpg	ecal_quality.jpg	r1	manage	154.0 K	2008-02-27 - 12:41	OlivierDeschamps
jpg	hcal_hot_L0.jpg	r1	manage	50.8 K	2008-02-27 - 12:42	OlivierDeschamps
jpg	hcal_quality.jpg	r1	manage	150.4 K	2008-02-27 - 12:41	OlivierDeschamps
jpg	hot_ecal_channels.jpg	r2 r1	manage	23.8 K	2008-02-27 - 13:05	OlivierDeschamps
jpg	prs0123_22Feb08_T0_Prev1-zoom.JPG	r1	manage	36.5 K	2008-02-27 - 12:45	OlivierDeschamps

Topic revision: r5 - 2008-02-28 - OlivierDeschamps

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