Level 1 trigger system for the Belle II experiment

2010 ◽  
Author(s):  
Yoshihito Iwasaki ◽  
ByungGu Cheon ◽  
Eunil Won ◽  
Gary Varner
Keyword(s):  
Trigger System ◽  
Belle Ii ◽  
Level 1

Level 1 Trigger System for the Belle II Experiment

2011 ◽  
Vol 58 (4) ◽  
pp. 1807-1815 ◽  
Author(s):  
Y. Iwasaki ◽  
ByungGu Cheon ◽  
Eunil Won ◽  
Xin Gao ◽  
L. Macchiarulo ◽  
...  
Keyword(s):  
Trigger System ◽  
Belle Ii ◽  
Level 1

scholarly journals CMS trigger performance

2018 ◽  
Vol 182 ◽  
pp. 02037
Author(s):  
Silvio Donato
Keyword(s):  
Computing Time ◽  
Track Reconstruction ◽  
Trigger System ◽  
Drastic Reduction ◽  
Event Selection ◽  
Level Trigger ◽  
Reconstruction Software ◽  
Last Stage ◽  
Level 1 ◽  
High Level

During its second run of operation (Run 2), started in 2015, the LHC will deliver a peak instantaneous luminosity that may reach 2 · 1034 cm-2s-1 with an average pileup of about 55, far larger than the design value. Under these conditions, the online event selection is a very challenging task. In CMS, it is realized by a two-level trigger system: the Level-1 (L1) Trigger, implemented in custom-designed electronics, and the High Level Trigger (HLT), a streamlined version of the offine reconstruction software running on a computer farm. In order to face this challenge, the L1 trigger has been through a major upgrade compared to Run 1, whereby all electronic boards of the system have been replaced, allowing more sophisticated algorithms to be run online. Its last stage, the global trigger, is now able to perform complex selections and to compute high-level quantities, like invariant masses. Likewise, the algorithms that run in the HLT have been greatly improved; in particular, new approaches for the online track reconstruction lead to a drastic reduction of the computing time, and to much improved performances. This document will describe the performance of the upgraded trigger system in Run 2.

scholarly journals Commissioning Experience with the ATLAS Level-1 Calorimeter Trigger System

2007 ◽  
Author(s):  
R. Achenbach ◽  
P. Adragna ◽  
V. Andrei ◽  
B.M. Barnett ◽  
B. Bauss ◽  
...  
Keyword(s):  
Trigger System ◽  
Level 1

scholarly journals The ATLAS level-1 central trigger system

2005 ◽  
Vol 52 (4) ◽  
pp. 1217-1222 ◽  
Author(s):  
P.B. Amaral ◽  
N. Ellis ◽  
P. Farthouat ◽  
P. Gallno ◽  
J. Haller ◽  
...  
Keyword(s):  
Trigger System ◽  
Level 1

scholarly journals Integrated upstream parasitic event building architecture for BTeV level 1 pixel trigger system

2005 ◽  
Author(s):  
Jinyuan Wu ◽  
M. Wang ◽  
E. Gottschalk ◽  
D. Christian ◽  
X. Li ◽  
...  
Keyword(s):  
Trigger System ◽  
Level 1
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