Level-2 Calorimeter Trigger Upgrade at CDF

被引：4

作者：

Bhatti, A. ^{[1
]}

Canepa, A. ^{[2
]}

Casarsa, M. ^{[3
]}

Convery, M. ^{[1
]}

Cortiana, G. ^{[4
]}

Donati, S. ^{[5
]}

Flanagan, G. ^{[6
]}

Greco, V. ^{[5
]}

Frisch, H. ^{[7
]}

Fukun, T. ^{[7
]}

Giannetti, P. ^{[5
]}

Krop, D. ^{[7
]}

Liu, T. ^{[3
]}

Lucchesi, D. ^{[4
]}

Piendibene, M. ^{[5
]}

Ristori, L. ^{[5
]}

Rogondino, L. ^{[5
]}

Rusu, V. ^{[7
]}

Sartori, L. ^{[5
]}

Vidal, M. ^{[8
]}

Zhou, L. ^{[7
]}

机构：

[1] Rockefeller Univ, New York, NY 10065 USA

[2] Univ Penn, Philadelphia, PA 19104 USA

[3] Fermilab Natl Accelerator Lab, Batavia, IL 60510 USA

[4] Ist Nazl Fis Nucl, Dept Phys, Padua, Italy

[5] Ist Nazl Fis Nucl, Dept Phys, Pisa, Italy

[6] Purdue Univ, W Lafayette, IN 47907 USA

[7] Univ Chicago, Chicago, IL 60637 USA

[8] CIEMAT, Madrid 2228040, Spain

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2009年 / 56卷 / 03期

关键词：

Calorimeter; CDF; FPGA; HEP; trigger;

D O I：

10.1109/TNS.2009.2016420

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The CDF Run 11 [1] Level 2 calorimeter trigger is implemented in hardware and is based on a simple algorithm that was used in Run I. This system has worked well for Run II at low luminosity. As the Tevatron instantaneous luminosity increases, the limitation due to this simple algorithm starts to become clear. As a result, some of the most important jet and MET (Missing ET) related triggers have large growth terms in cross section at higher luminosity. In this paper, we present an upgrade of the L2CAL system which makes the full calorimeter trigger tower information directly available to the Level 2 decision CPU. This upgrade is based on the Pulsar [2], a general purpose VME board developed at CDF and already used for upgrading both the Level 2 global decision crate [3] and the Level 2 Silicon Vertex Tracking [4]. The upgrade system allows more sophisticated algorithms to be implemented in software and both Level 2 jets and MET can be made nearly equivalent to offline quality, thus significantly improving the performance and flexibility of the jet and MET related triggers. This is a natural expansion of the already-upgraded Level 2 trigger system, and is a big step forward to improve the CDF triggering capability at Level 2. This paper describes the design, the hardware and software implementation and the performance of the upgrade system.

引用

页码：1685 / 1689

页数：5

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