On-line analysis

On-line analysis

Data can be written either to the file or to the shared memory buffer. These two modes lead to two methodes of on-line analysis:
  • Data is in the files;
  • Data is in the shared memory buffer;

    • Analysis of the data from the files

    Data are stored in the sequential set of files. The list of these file with the full pathnames has to be written to the configuration file ~daq/lib/config/input.dat.save , one filename per a line. An exclaimination mark (!) in the first character of the line is a comment, i.e. the file from this commented line will not be processed. The result of analysis will be written to the HBOOK4 file ol_analysis.his

    Run the command "onl f" to start data analysis. A list of files to be analyzed will be printed to the terminal. If the previously written histogram file ol_analysis.his exists in the current directory, a question will be asked whether the histograms from this file will be updated or replaces.

    After each processed data file a histogram file ol_analysis.his will be written to the current directory, and the question will be asked whether to proceed with the next data file.

    Analysis of the data from the shared memory buffer

    Data is stored in the shared memory buffer. To process these data, run the command "onl m". The data will be read and analysed from the buffer until the End-of-run is encountered.

    Histograms are stored to the HBOOK4 global section entitled 'ONL'. These histograms can be read by paw.

    Steps common for both methods of data reading

    During the data processing some statistics and error messages is printed to the terminal. After each error event a beep sounds. All error and statistics is written also to the file ol_analysis.err in the current directory.

    Histograms either the HBOOK file ol_analysis.his or from the global section 'ONL' can be read by paw. The list of histogram is as follows:

    ID Explanation
    General characteristics
    1 Event type
    2 Event length
    3 Errors in events (see below)
    Energy in calorimeter
    11 Energy sum in events (all calorimeter)
    12 Energy sum in central part of detector (exclude 3 edge counter)
    13 E max in events
    14 Energy sum in cluster around max cell
    Scalers
    21-25 S1S2S3, Strob, Beam, T0, T02
    31 Beam/Strob
    32 T0/Strob
    33 T0/Beam
    34 2*(T0-T02)/(T0+T02)
    Beam hodoscope
    ih=1-4 (X1,Y1, X2,Y2)  
    100+ih Multiplicity
    110+ih Signal in hodoscope (sticks)
    120+ih Coordinate in hodoscope (cluster centers, 4-coincendence)
    130+ih Coordinate in hodoscope (cluster centers, all events)
    141 X on target (calculated)
    142 Y on target
    143 (X,Y) on hodoscope 1
    144 (X,Y) on hodoscope 2
    145 (X,Y) on target
    146 (X1,X2)
    147 (Y1,Y2)
    Proportional chamber
    201 X-signal
    202 Y-signal
    203 (X,Y)-signal
    211 Multiplicity in X-plane
    212 Multiplicity in Y-plane
    221 Number of clusters in X-plane
    222 Number of clusters in Y-plane
    231 Cluster length in X-plane
    232 Cluster length in Y-plane
    241 X-coord of clusters
    242 Y-coord of clusters
    Histograms with information for each chanel (PD, LD, TR)
    100 000*itrigg +
    10 000*icrate +
    100*istation +
    ichanel     		itrigg = 1-4 : Event type (Ped,Led,Energy, Sum(energy))
    icrate = 1-3 : Crate number
    istation = 1-20: Station number in each crate
    ichanel = 1-16: Chanel number in each station
    Alpha information in each station
    500 000 +
    10 000*icrate +
    100*istation     		icrate = 1-3 : Crate number
    istation = 1-20: Station number in each crate
     
    2101,2102,2103 Led amplitudes in fiber bunches 1,2,3
    Hit patterns
    2000 Hit pattern of leds vs. (X,Y)
    3000 Hit pattern of energy vs. (X,Y) for E>7
    4000 Hit pattern of max energy vs. (X,Y)
    Info for each crate icr=1-3
    1030+icr Hit pattern of good ped. vs. (station,chanel)
    2030+icr Hit pattern of good leds vs. (station,chanel)
    3030+icr Hit pattern of good energy vs. (station,chanel)
    4030+icr Hit pattern of max energy vs. (station_max,chanel_max)
    1040+icr Hit pattern of bad ped. vs. (station,chanel)
    2040+icr Hit pattern of bad leds vs. (station,chanel)
    3040+icr Hit pattern of bad energy vs. (station,chanel)
    Statistics for PD, LD, AL (mean, sigma) for each crate icr=1-3
    1000+icr Number of pedestal signals vs. channel number
    1010+icr Mean pedestal signals vs. channel number
    1020+icr RMS of pedestal signals vs. channel number
    2000+icr Number of led signals vs. channel number
    2000+icr Number of led signals vs. channel number
    2010+icr Mean led signals vs. channel number
    2020+icr RMS of led signals vs. channel number
     
    5010 Mean Alpha vs. supermodule number
    5020 RMS Alpha vs. supermodule number

    A friendly interface based on paw++ exists to browse the histograms. To use this interface, run paw++ and in the Paw++ executive window in the Input Pad type a command
       PAW++ [1] onl
    Then a panel "On-line analysis" will be created with buttons corresponding to each histograms.

    Error Description
    Error Explanation
    1 Wrong event type
    2 lenread is greater than ndat
    3 Read record length is not equal to declared one (2*lenread-2 != iok)
    4 Sum of block lengths is greater than total length
    5 Block EA ocurred twice
    6 Current event number is smaller than the previous one
    7 Number of blocks is greater than described in config
    8 Number of ADC crates is greater than described in config
    9 Block EA is absent
    10 Blocks A* (ADC) are absent
    11 Wrong block name
    12 Wrong block BH length
    13 Wrong block BP length
    14 Wrong block PE length