Monitoring of calorimeter response : few examples

Transcription

1 Monitoring of calorimeter response : few examples Based on discussions with Frédéric, Jacques, Marie-Hélène, Marie-Noëlle and Yuri * Topic discussed already many times by various people Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

2 What to monitor Majority of potential HW problems covered by ECS/safety -> fire, water leaks, turbines (????), overheat of power supplies, v permanently Full checks between runs Configuration e.g. using test patterns -> spy RAM Check PMT gain stability -> talk by Yuri Check electronics settings + internal FEE consistency checks Assure data quality v during the run Check electronics path (PMT+CW+FEB->) : pedestals, LED -> talk by Yuri Check full path (particles + detector + electronics) : occupancies, symmetries, smoothness physics (pi0, eta, J/Psi, electrons, ) + Trigger path -> talk by Patrick v during the run Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

3 What to show Goal : produce message Problem! ; easily locate the problem Individual channels Averages : over FEB, over crate (?) (Text) warnings/alarms for shift crew (?) report (warning) switch off summon the expert alarm Pit Printouts/Displays t/di for calorimeter people (?) -> in terms of channels/boards/crates and calo surface How to react? List of recipes from the experience during commissioning Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

4 Occupancy data plots Occupancy : # of hits above threshold positive signal particles/noise negative signal can occur from long pulses, after subtraction Use smoothness of distributions similar il to e.g. energy flow calibration method Identifies : malfunctioning channel/feb/pmt/detector_cell/ Example : cosmics data Cells of similar size should yield similar occupancy, given PMTs have the same gain noise is suppressed by threshold Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

5 % Positive (thr=10) Negative (thr=-10) Ratio N/P, N(P)>10 crate 22 crate 23 HCAL channel channel hannel c Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting, board board

6 HCAL Positive (thr=10) % Negative (thr=-10) % Ratio N/P, N(P)>10 Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

7 % Positive (thr=50) Negative (thr=-50) Ratio N/P, N(P)> ECAL channel channel hannel c Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting, board number

8 ECAL Positive (thr=50) % Negative (thr=-50) % Ratio N/P, N(P)>10 Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

9 ECAL channel (thr=10) Negative (thr=-10) Ratio N/P, N(P)>10 %Positive channel hannel c Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

10 ECAL Positive (thr=10) % Negative (thr=-10) % Ratio N/P, N(P)>10 Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting, %

11 LED data plots Pedestals : position, width LED path : sigma/mean Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

12 HCAL Pedestal mean, sigma(= point error) for HCAL-C channels ADC chann nels Sequential channel number Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

13 HCAL Pedestal mean ADC channels Pedestal sigma ADC channels Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

14 HCAL Pedestal mean crate 22 crate 23 channel Pedestal sigma nnel chan board number Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

15 ECAL Pedestal mean, sigma(= point error) for ECAL-C channels ADC chann nels Sequential channel number Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

16 ECAL Pedestal mean ADC channels Pedestal sigma ADC channels Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

17 ECAL channel Pedestal mean ECAL detector info zone (x;y) e.g. MID (26;40) FEE info (Crate;FEB;Ch) e.g. (10;2;28) Variable = 1.4 Pedestal sigma nnel chan board number Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,

18 Detector view ECAL detector info zone (x;y) e.g. MID (26;40) FEE info (Crate;FEB;Ch) e.g. (10;2;28) Variable = 10.4 Plots from Marie-Hélène Sergey Barsuk, LAL Orsay Calorimeter response monitoring Calorimeter meeting,