A readout buffer prototype for ATLAS high-level triggers

Author

Calvet, D. ; Gachelin, O. ; Huet, M. ; Le Dû, P. ; Mandjavidze, I. ; Mur, M.

Author_Institution

CEA, Centre d´´Etudes Nucleaires de Saclay, Gif-sur-Yvette, France

Volume

48

Issue

4

fYear

2001

fDate

8/1/2001 12:00:00 AM

Firstpage

1290

Lastpage

1293

Abstract

Readout buffers are critical components in the dataflow chain of the ATLAS trigger/data-acquisition system. At up to 75 kHz, after each Level-1 trigger accept signal, these devices receive and store digitized data from groups of front-end electronic channels. Several readout buffers are grouped to form a readout buffer complex that acts as a data server for the high-level trigger selection algorithms and for the final data-collection system. This paper describes a functional prototype of a readout buffer based on a custom-made PCI mezzanine card that is designed to accept input data at up to 160 MB/s, to store up to 8 MB of data, and to distribute data chunks at the desired request rate. We describe the hardware of the card that is based on an Intel 1960 processor and complex programmable logic devices. We present the integration of several of these cards in a readout buffer complex. We measure various performance figures and discuss to which extent these can fulfil ATLAS needs

Keywords

buffer circuits; data acquisition; nuclear electronics; programmable logic devices; trigger circuits; 160 Mbit/s; 8 MB; ATLAS; Intel 1960 processor; PCI mezzanine card; ROBIN; data acquisition; high-level triggers; programmable logic devices; readout buffer; trigger; Bridges; Buffer storage; Delay; Detectors; Driver circuits; Hardware; Programmable logic devices; Protocols; Prototypes; Random access memory;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.958768

Filename

958768