Speaker
Dr
Martin Purschke
(BROOKHAVEN NATIONAL LABORATORY)
Description
The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has
commissioned several new detector systems which are part of the
general readout for the first time in the RHIC Run 7, which is
currently under way.
In each of the RHIC Run periods since 2003, PHENIX has collected about
0.5 PB of data. For Run 7 we expect record luminosities for
the Au-Au beams, which will lead to even larger data sizes.
We have in the past used GRID tools to transfer substantial data
volumes in the order of 400TB off-site in order to make use of remote
computing capacity in Japan, France, and the US, and are set up to do
the same in Run 7.
Even at the highest expected luminosities we will still be able
to log all events triggered by the level-1 trigger in this Run. The
data acquisition system can sustain a rate of up to 600MB/s. In order to
expedite the analysis of interesting events, we will use the Level-2 trigger
system as a filter to select interesting events for priority
reconstruction and analysis.
We will give an overview of the online system, our strategies to cope
with the data storage demands, near-line transfers to off-site
locations, and analysis strategies.
| Submitted on behalf of Collaboration (ex, BaBar, ATLAS) | for the PHENIX Collaboration |
|---|
Author
Dr
Martin Purschke
(BROOKHAVEN NATIONAL LABORATORY)
