Online Computing (Data Acquisition, Slow Control, etc.)
HERA-B Short History
HERA-B
is an experiment to study
CP violation
in the
B
system
using an internal target at the
DESY
HERA proton ring.
The experiment combines a strong physics program with a most exciting technical
challenge and provides a first opportunity to apply on a large scale detector
developments started for
LHC
.
In February 1995 the experiment, as described in the
Technical Design Report
, is approved by the DESY directorate.
On December 15, 1995 the Hera-B magnet is powered for the first time.
During
1996 various detector and electronics prototypes are installed on the HERA-p
proton beam.
In 1997 first common DAQ is commissioned, involving parts of VDS, ECAL
and tracking system. Background studies are performed and first significant
physics signals are seen.
In October 1997 the electromagnetic calorimeter (ECAL) is fully assembled.
Electronics readout and pretrigger cards are commissioned.
In 1998 a significant part of the detector is assembled in its final
configuration.
Final DAQ and trigger commissioning starts. The mass production of ECAL
readout and pretrigger electronics starts.
1999 is mainly devoted to mass production: inner and outer tracking systems,
FLT electronics, muon detector
electronics, etc. .
At the beginning of year 2000 the detector is nearly complete. Full experiment
commissioning starts.
In September 2000 the experiment stops due to HERA luminosity upgrade.
Middle 2001: re-start commissioning. 2001-2002 Physics run !
(Actual photos of the installation).
