The PHENIX online computing system

Author

Purschke, Martin L. ; Adler, Stephen ; Desmond, Edmond ; Ewell, Lars ; Haggerty, John ; Kehayias, Hyon-Joo ; Roth, Ryan ; Witzig, Chris ; Pate, Stephen S.

Author_Institution

Dept. of Phys., Brookhaven Nat. Lab., Upton, NY, USA

Volume

47

Issue

2

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

51

Lastpage

55

Abstract

The Online Computing System (ONCS) is responsible for the overall configuration and control of the PHENIX detector system. The experiment is made up of 4 spectrometer arms with a total number of 11 subdetectors, which need to be operated by a single control and monitoring system. This includes the configuration of the individual components of the readout system, as well as the control of the state of the detector´s data flow. Furthermore, the ONCS system sets up the environment for the online monitoring of the detectors. The slow control of high voltages and other ancillary devices is also part of the system. The ONCS system is designed around a distributed computing model which relies on CORBA object oriented technology, the ROOT system as the backbone of the online monitoring, and EPICS for the control of the High Voltage systems. Issues regarding the use and implementation of these technologies in the ONCS system are discussed, as well as the methods used to control the state and health of the PHENIX detector

Keywords

data acquisition; distributed object management; high energy physics instrumentation computing; CORBA object oriented technology; PHENIX detector system; PHENIX online computing system; distributed computing model; online monitoring; readout system; spectrometer arms; subdetectors; Arm; Control systems; Data acquisition; Detectors; Digital signal processing; Monitoring; Physics computing; Spectroscopy; Timing; Voltage control;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.846116

Filename

846116