Etude et impact du bruit de fond corrélé pour la mesure de l'angle ...

54 3. The Double Chooz experiment
The RC and its Graphical user interface (GUI) represent the control interface
between the shifter, both onsite or remote, and the DAQ. It allows to
configure the parameters of the run through di↵erent run profiles (physics
run, calibration run, test run, etc.), to start and to stop the data acquisition.
The communication between the RC and the DAQ is provided by
internet connection to the DAQ servers. For each run, related informatel-00821629,
version 1 - 11 May 2013
Figure 3.9: Schema of the FD online system.
to convert binary files into ROOT format [7]. The data are then sent to the
main storage system at CCIN2P3 (Lyon, France) [1].
The data acquisition is controlled by both onsite and o↵site (remote) shifter
through the run control (RC) and monitored by a monitoring system.
3.3.1 Data acquisition
The data acquisition is performed by the 5 ROPs continuously polling the
FADC cards to check if a trigger signal was received. When trigger is received
the ROPs read-out the FADC memory bu↵er and sent the data to
the EBP via TCP/IP protocol over 1 Gb/s ethernet connection.
The EBP is a multi-thread software which collects data from the di↵erent
ROPs and write them on a binary file. One binary files per run is written
on a local 450 GB disk. The raw data volume, produced by the read-out of
512 FADC waveform, amounts to about 64 kB/trigger, for a total amount
of about 30 GB/hour or 720 GB/day given a trigger rate of about 140 Hz,
as measured during the current data taking.
3.3.2 Run control