The COMPASS off-line system

doi:10.1016/S0010-4655(01)00258-2

Computer Physics Communications

Volume 140, Issues 1–2, 15 October 2001, Pages 82-91

https://doi.org/10.1016/S0010-4655(01)00258-2 Get rights and content

Abstract

COMPASS is a new fixed target high rate experiment at CERN. The expected RAW data size is in the order of 300 TB per year, collected during about six months of data taking at the mean rate of 35 MB/s. To fulfill the experiment requirements, the Collaboration decided to build the off-line system using new technologies. The computing power needed for RAW data processing has been estimated to be in the order of 2000 SPECint95, and will be provided by a farm of about 200 CPUs. The reconstruction program is under development and is written using object-oriented techniques and C++ as the programming language. In the present model, all the experimental and reconstructed data will be stored in an object database management system.

References (20)

G. Baum et al. (COMPASS Collaboration), COMPASS: A proposal for a common muon and proton apparatus for structure and...
G. Baum et al. (COMPASS Collaboration), COMPASS: Common muon and proton apparatus for structure and spectroscopy:...
F. Bradamante
Highlights from the COMPASS experiment at CERN
COMPASS requests for computing
Memorandum to COCOTIME
(July 31, 1997)
LHC++ Project Execution Plan, CERN/LCB 97-8; see also...
Objectivity/DB, trademark Objectivity Inc., Mountain View, California, USA, http://www.objectivity.com; see also...
M. Lamanna
The COMPASS Computing Farm project
New Computer Farms for NA48, NA45 and Compass, Conclusions Document, 24th April 1998,...
F. Gagliardi, Remote data-recording and processing for NA48,...
Central Data Recording

There are more references available in the full text version of this article.

Cited by (3)

The COMPASS experiment at CERN: Present and future
2006, Nuclear Physics B - Proceedings Supplements
COMPASS is a new fixed target experiment presently in operation at CERN. It consists of a modern two-stage magnetic spectrometer, with particle identification and calorimetry in both stages, which has started collecting physics data in 2002, and will run at the CERN SPS at least until 2010. First results obtained with a 160 GeV muon beam on a polarized deuteron target are presented for several physics channels under investigation: in the longitudinal target cofiguration, a very precise measurement of the structure function $g_{1}^{d}$ and the first precise measurement of $Δ G / G$ , the gluon polarization in a polarized nucleon; in the transverse target mode, the first ever measurements of single spin asymmetries of the deuteron in DIS processes.
An outline is also given of the physics programme of COMPASS with hadron beams, as well as the plans of the Collaboration for the near future. Topical to this workshop, are possible extensions of the presently approved COMPASS programme after 2010. A brief account is given of the present speculations of the Collaboration on this matter, which foresee both an increase of luminosity of the CERN SPS muon beam and a strengthening of the spectrometer.
Spin physics at COMPASS
2005, Progress in Particle and Nuclear Physics
COMPASS is a new fixed target experiment currently in operation at CERN. It has the goal of investigating hadron structure and hadron spectroscopy by using either muon or hadron beams. From measurements of various hadron asymmetries in polarized muon–nucleon scattering it will be possible to determine the contribution of the gluons to the nucleon spin. The main objective of the hadron program is searching for exotic states, and glueballs in particular. This physics programme is carried out with a two-stage magnetic spectrometer, with particle identification and calorimetry in both stages, which started collecting physics data in 2002, and will run at the CERN SPS at least until 2010. Preliminary results from the 2002 run with a 160 GeV muon beam are presented for several physics channels under investigation.
Conditions database system of the COMPASS experiment
2003, Computer Physics Communications
The CERN SPS experiment COMPASS has integrated a Conditions Database System in its off-line software. The system is used to manage time-dependent information, detector condition, calibration, and geometrical alignment information, by using a package provided by the CERN IT/DB. This integrated system consists of administration tools, a data handling library, and data transfer software from the detector control system to the Conditions Database. In this paper, the status of the Conditions Database project is described, and the results of the performance test on the COMPASS computing farm are given.

¹: On behalf of the COMPASS Collaboration.

View full text

The COMPASS off-line system

Abstract

Highlights from the COMPASS experiment at CERN

COMPASS requests for computing

Memorandum to COCOTIME

The COMPASS Computing Farm project

Central Data Recording