The charged trigger system of NA48 at CERN

被引：14

作者：

Anvar, S ^{[1
]}

Bugeon, F ^{[1
]}

Debu, P ^{[1
]}

Fallou, JL ^{[1
]}

Le Provost, H ^{[1
]}

Louis, F ^{[1
]}

Mur, M ^{[1
]}

Schanne, S ^{[1
]}

Tarte, G ^{[1
]}

Vallage, B ^{[1
]}

机构：

[1] CEA Saclay, DAPNIA, F-91191 Gif Sur Yvette, France

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1998年 / 419卷 / 2-3期

关键词：

D O I：

10.1016/S0168-9002(98)00880-8

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

The NA48 charged trigger is a mixed hardware and software real-time processing system intended to detect the interesting configurations of K-o charged decays. It achieves real-time event building, track reconstruction and kinematics computation on drift chamber data at an event rate of 100 kHz and within a maximum decision latency of 100 mu s. The system uses data driven, FPGA-based coordinate builders, a hardware event builder based on a crossbar switch, and a farm of up to 16 event processors for its software part. It has been installed and operated at CERN since 1995. After a description of the constraints and architecture of the various subsystems, the paper gives an account of the results and performance of the system based on the 1996/1997 runs. More specifically, the replacement of the present DSP-based implementation of the processing farm by RISC processors will be discussed. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：686 / 694

页数：9