EC Software Suite 1 EcMon: Monitors raw, calibrated and reconstructed data in real-time with detector map navigation, strip- charts, histograms. Single-event,

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Presentation transcript:

EC Software Suite 1 EcMon: Monitors raw, calibrated and reconstructed data in real-time with detector map navigation, strip- charts, histograms. Single-event, rate and accumulation modes. EcCal: Performs calibration procedures and displays intermediate results (PMT gains, attenuation lengths, timing offsets and other constants.) EcRec: Offline/online energy cluster reconstruction package. Will also be used to select suitable calibration events for EcCal. CCDB EcMon DAQ ET EcCal EcRec Contributors Gagik Gavalian (JLAB) Nicholas Compton (Ohio U) Taya Chetry (Ohio U) Cole Smith (UVA)

Progress 2 CCDB tables /test/fc: FADC parameters (pedestals, NSA, NSB, TET) used by EventDecoder, PeakFitter. /calibration/ec: ECAL and PCAL tables reorganized into single table. /calibration/ec/attenuation: Run 1=no attenuation, Run 2-10=376 cm, Run 11-inf = measured. GEMC Simulations using realistic attenuation constants from CCDB. Muon runs (1-2 GeV) to test calibration, monitoring and reconstruction packages. Pi-zero runs to evaluate two-photon reconstruction efficiency. EC Software Suite EcMon: Added real-time monitoring of gain/attenuation calibration, pedestals and timing. Decoding of Mode 7 FADC pulse integral and high-resolution timing. EcRec: Restructuring of package (Gagik). Both GEMC and EcRec using calibration constants from CCDB. Reconstruction includes attenuation corrected energy. EcCal: Development of utility and draw Java classes for PCAL strips, pixels (Nick Compton). Studies on systematics of 3-parameter attenuation fits to PCAL cosmic data (Taya Chetry).

EC Monitoring (EcMon) 3 Detector panel (left) allows navigation at the strip level (ECU, ECV, ECW) or pixel level (EC PIX). Detector elements color-coded with events (EVT) or mean ADC, TDC values. Monitoring panel (right) uses tabs to group monitored items (occupancy, calibration, pedestals, etc.) At strip level all raw data are shown. At pixel level only events with single pixel hits are shown.

4 Detector navigation maps are collections of pixel and strip objects which map to the histogram data. Each strip object contains only the pixels relevant for calibration of that strip. Each pixel object contains energy loss distribution of MIP muons. Mean ADC per pixel Strip U 27 CalibrationData object created for each strip: 1.Pixels stored in rawgraphs. 2.Exponential fit to pixels stored in fitgraphs. 3.Fitting function and fitted parameters stored in functions. EC Monitoring (EcMon) Adapted from Youri Gotra / SVT suite

5 EcMon: Calibration Monitoring CCDB Fit to GEMC simulation Expected MIP Calibrations performed as data accumulate. Results shown in real-time. Allows timely evaluation of cuts, systematics issues, and convergence of fits.

gemc gcard/fc-ecpcsc-s2.gcard –RUNNO=12 –N= –USE_GUI=0 Calibration Validation using GEMC Minimum ionizing muons used to simulate cosmic data and test monitoring and calibration suites. EcMon display of pixel hits from GEMC data

7 CCDB Attenuation Fit to GEMC simulation Expected MIP Validiation of Calibration Algorithm Fits to simulations used to study assumptions, cuts and thresholds which underlie energy calibration based on MIP cosmic-muons. GEMC now uses realistic cosmic-muon generator. Effect of knock-on electrons and multiple scattering can be studied. Fits to GEMC data also used to validate attenuation extraction.

8 FADC Mode 7 provides event-by-event pedestals. Used to monitor luminosity related noise levels, light leaks, etc. by comparing to reference pedestals measured under normal conditions. Light Leaks EcMon: Noise Monitoring

9 Tim e difference between EC Inner, Outer strips can be used to monitor quality of time calibration, changes in offsets, noise, etc. FADC Mode 7 timing shown here. EcMon: TDC Monitoring

10 EC Reconstruction EcRec upgrade: 1.Calibration constants from CCDB (done). 2.Attenuation correction (done). 3.Iteration of reconstruction (in progress). 4.Indexing to allow identification of strips in clusters, peaks (for iteration, calibration) (done). 5.Configuration parameters: thresholds, peak/cluster/iteration options, etc. (in progress). 6.Two-cluster identification with shared energy in peaks (for pi-zeros) (in progress). ✔ ✖ ✖ ✖ ✖ ✔ Peaks are defined as groups of adjacent strips, but two peaks with shared energy are missed. Simple solution for shared-energy peaks is to raise threshold. Better solution is 2 nd pass over peak objects to find double peaks. Still must decide how to apportion energy to each peak, which requires information from other views. Also peaks can belong to 2 clusters. Plan: Implement CLAS6 era algorithm in Java with rigorous testing using GEMC simulations. Validation of reconstruction PCAL ECAL

PCAL Calibration 11 Fractional deviation of measured and expected shape of fitted attenuation curves for U strips PCAL calibration GUI under development by Ohio University group. PCAL pixel geometry complicated by aperiodic overlap of U,V,W strips. JAVA classes to describe overlapping strip objects developed by Nick Compton. Systematics of fitting algorithms using 2-strip and 3-strip pixels are being studied by Taya Chetry using GEMC simulations. Baseline CCDB calibration constants will be derived from pre-installation test setup cosmic runs taken in Forward carriage data will be used to evaluate changes during last 4-5 years.

12 EcRec Finish upgrade and begin study of pi-zero reconstruction. Add methods to provide pixel cut data for energy calibration. EcMon Incorporate strip-chart, update and single-event modes. Import EPICS HV and scaler data into displays. Detector status plots which incorporate various data sources. EcCal Implement timing calibration and ECAL/PCAL relative alignment procedures. Current plan is to develop EcCal as plug-in for EcMon. Could also run under CLARA as stand-alone service. ECAL and PCAL calibration algorithms may be merged within this package. Demonstrate complete MIP-based calibration cycle (HV adjustment and CCDB table entry) for both ECAL (likely first) and PCAL by mid-Spring Near-term Goals (2-3 months)