AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
AIDA
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> The attached figure shows the configuration used to test the synchronization of the DAQ systems using a > correlation scalar counted from a common clock signal (DAQcorrelation_diagram.pdf). > > The chosen solution was to use a 25 MHz clock generated by the MACB modules of AIDA, which was distributed to > the other two systems by a SIS36/38xx module in the BRIKEN VME crate. > > The correlation can be monitored online using the MIDAS DataXfer and DataSpy libraries > (http://npg.dl.ac.uk/MIDAS/DataAcq/Data.html). Each system operates a > DataRelay program that sends a data stream consisting only of IDs and time-stamps to a common DataSink (this > requires a DataRelay code that does some filtering of the raw data for each system). The scheme is shown in > attached diagram (DAQsoftware.pdf). > > The DataPeek_Merge and SyncCheck codes use C++11 for parallelization of tasks, which is a helpful feature to > improve the efficiency of finding coincidences between the correlation pulses. Thus, the code will not run in > PCs with any Linux version. For example, it requires version 7 of ScientificLinux, which installed in the PC > being used for BRIKEN DAQ control that will stay at RIBF for the time being. > > > ++ SYNCHRONIZATION RESULTS ++ > > The figure correlation_25Hz.png shows a correlation plot for the BRIKEN+RIBF+AIDA running with correlations done > by a pulser at 25 Hz. A large fraction of the pulsers appear in the double-coincidence plots (top row; same plots, > except the 'Partial' one is automatically cleared every ~10seconds). > > The bottom plots show the pair-wise correlations between BRIKEN and RIBF or AIDA. BRIKEN was defined as the > 'master' in this test, but current version of the program is flexible to select any stream as the master one. > > The second figure (correlation_random.png) shows the same test, but using a non-periodic pulser to trigger the > correlation scalar. We observed the same level of synchronization (peaks look brader just because of the zoom level).
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