NDLI: Demonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System

Content Provider	IEEE Xplore Digital Library
Author	Bilka, T. Casarosa, G. Fruhwirth, R. Kleinwort, C. Kodys, P. Kvasnicka, P. Lettenbichler, J. Paoloni, E. Rauch, J. Schluter, T. Yashchenko, S.
Copyright Year	1963
Abstract	The future Belle II experiment will employ a computer-farm based data reduction system for the readout of its innermost detector, a DEPFET-technology based silicon detector with pixel readout. A large fraction of the background hits can be rejected by defining a set of regions of interest (ROIs) on the pixel detector sensors (PXD) and then recording just the data from the pixels inside the ROI. The ROIs are defined on an event by event basis by extrapolating back onto the PXD the charged tracks detected in the outer trackers (a four-layer double-sided silicon strip detector surrounded by a wire chamber). The tracks are reconstructed in real time on the High Level Trigger (HLT). The pixel detector is then read out based on the ROI information. A demonstrator of this architecture was under beam test earlier this year in DESY (Hamburg, Germany). The demonstrator was operated in an electron beam whose momentum was in the 2-6 GeV/c range with a typical trigger rate of a few kilohertz in a magnetic field of strength up to 1 T. The demonstrator consists of one pixel sensor and four silicon strip sensors arranged in a five-layer configuration mimicking the Belle II vertex detector. The detector readout was a scaled down version of the full Belle II DAQ + HLT chain. The demonstrator was used to detect the particles, reconstruct in real time the trajectories, identify the ROIs on the PXD plane and record the PXD data within. We describe the requirements and the architecture of the final system together with the results obtained with the demonstrator.
Sponsorship	IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD
Starting Page	1155
Ending Page	1161
Page Count	7
File Size	1020529
File Format	PDF
ISSN	00189499
Volume Number	62
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Software Silicon Data acquisition Telescopes Strips vertex detectors Belle II data reconstruction tracking triggering
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering

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Demonstrator of the Belle II online tracking and pixel data reduction on the High Level Trigger system

Demonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger

Demonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System

Demonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System

Data Acquisition System for the Belle II Experiment

The data acquisition system of the Belle silicon vertex detector (SVD) upgrade

Data Flow and High Level Trigger of Belle II DAQ System

Data scanner system of the BELLE silicon vertex detector

The CMS High Level Trigger System

Demonstrator of the Belle II Online Tracking and Pixel Data Reduction on the High Level Trigger System

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