The enhanced data acquisition system for the 4π detector CHIMERA

Author

Aiello, S. ; Alderighi, M. ; Anzalone, A. ; Bartolucci, M. ; Campisi, M.G. ; Cardella, G. ; Cavallaro, S. ; De Filippo, E. ; Feminò, S. ; Geraci, E. ; Geraci, M. ; Giustolisi, F. ; Greco, A. ; Guazzoni, P. ; Manno, C. M Iacono ; Lanzalone, G. ; Lanzano, G

Author_Institution

Ist. Nazionale di Fisica Nucl., Catania, Italy

Volume

47

Issue

2

fYear

2000

fDate

4/1/2000 12:00:00 AM

Firstpage

114

Lastpage

118

Abstract

CHIMERA is a second generation 4π detector for high resolution light particle and fragment measurements in the field of intermediate energy nuclear reactions. An enhanced data acquisition, control and trigger system has been developed to manage the almost 5000 electronic channels of the detector. The data acquisition system is based on a Fast Data Link (FDL) connection between 9U VME crates. The FDL is a highly programmable VME device. It performs data readout and transfer to a destination VME CPU, the FIC8243, running the real time OS9 operating system. Data read and transfer is performed by a fast protocol (Sparse Data Scan) whose performances have been improved introducing the Chained Block Transfer mode (CBLT) technique. Data collected by the CPU are broadcast to analysis work-stations for on-line data analysis and storage. All commands from and to the VME CPU are sent by socket-based network protocols. Complete remote control of the electronic front-end is obtained by a system of client-server applications. A first level event selection and control during readout is made by a trigger system based on a new VME 9U board (MUSE), fully integrated with the FDL readout system

Keywords

client-server systems; data acquisition; high energy physics instrumentation computing; nuclear electronics; transport protocols; trigger circuits; CHIMERA; Chained Block Transfer mode technique; Fast Data Link connection; Sparse Data Scan protocol; client-server applications; electronic channels; electronic front-end; enhanced data acquisition system; first level event selection; fragment measurements; high resolution light particle measurement; intermediate energy nuclear reactions; on-line data analysis; socket-based network protocols; trigger system; Control systems; Data acquisition; Detectors; Energy measurement; Energy resolution; Nuclear electronics; Nuclear measurements; Nuclear power generation; Particle measurements; Protocols;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.846128

Filename

846128