The ATLAS High Level Trigger Region of Interest Builder

Details The ATLAS High Level Trigger Region of Interest Builder The ATLAS High Level Trigger Region of Interest Builder

2007-11-20

arxiv.org/abs/0711.3217v1

JINST 3:P04001,2008

Physics

Instrumentation and Detectors

13 pages, 7 figures

Scientific paper

10.1088/1748-0221/3/04/P04001

This article describes the design, testing and production of the ATLAS Region of Interest Builder (RoIB). This device acts as an interface between the Level 1 trigger and the high level trigger (HLT) farm for the ATLAS LHC detector. It distributes all of the level 1 data for a subset of events to a small number of (16 or less) individual commodity processors. These processors in turn provide this information to the HLT. This allows the HLT to use the level 1 information to narrow data requests to areas of the detector where level 1 has identified interesting objects.

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