AIDA
GELINA
BRIKEN
nToF
CRIB
ISOLDE
CIRCE
nTOFCapture
DESPEC
DTAS
EDI_PSA
179Ta
CARME
StellarModelling
DCF
K40
BRIKEN
Draft saved at 00:00:00
Fields marked with
*
are required
Entry time:
Sat Mar 29 11:17:38 2025
Author
*
:
Subject
*
:
> > We have performed a successful test of the integration of independent DAQ systems based on a correlation > scalar counted from a common clock signal. The principles of the integration method are described in the > following AIDA elog entry: https://elog.ph.ed.ac.uk/AIDA/29 > > The configuration of the setup we used in the RIKEN test is described by the attached figure: > 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 (a > slightly modified versio of the method proposed by PCS in AIDA Elog#29). > > The correlation can be monitored online using the MIDAS DataXfer and DataSpy toolkits > (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). The scheme is shown in the 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 broader because of the > zoom level).
Encoding
:
HTML
ELCode
plain
Suppress Email notification
Attachment 1:
Drop attachments here...
Draft saved at 00:00:00
ELOG V3.1.4-unknown