Speaker
Dennis Getzkow
(JLU Gießen)
Description
The Belle II experiment, starting in October 2018, will provide a much higher
luminosity as its successor, the Belle experiment. For this achievment, the
Belle II-electron-positron collider in Tsukuba, Japan, will make use of a
novel nano beam scheme. A pixel detector using DEPleted Field Effect
Transistors will be the innermost detector subsystem. It will consist of two layers and in
total 40 ladders each with 250 times 768 pixels. The data rate is expected to be
~20 GB/s. Therefore a sophisticated data selection system is needed to filter
out backround data. This is where the ONline SElection Nodes (ONSEN) take place. The
ATCA based FPGA system performs an online data reduction based on
Regions-Of-Interest (ROIs). These regions are calculated via two indepentend
systems which perform tracking in the outer detector systems and then figure
out regions relevant for physics analysis on the pixel detector ladders. This allows an
expected data reduction by a factor of ~30.
In April 2016, first tests with two ladders, arranged in two layers, were
performed at DESY, Hamburg, Germany. These tests were performed with electron
beams with energies up to 5 GeV. Results of performance tests of the ONSEN and
the data reduction, respectively, will be shown.
This work was supported by the Bundesministerium für Bildung und Forschung
(BMBF) under grant number 05H15RGKBA.
Primary author
Dennis Getzkow
(JLU Gießen)
Co-authors
Dr
Björn Spruck
(JGU Mainz)
Dr
Jens Sören Lange
(JLU (Gießen))
Jingzhou Zhao
(IHEP Beijing)
Klemens Lautenbach
(JLU Gießen)
Dr
Thomas Geßler
(JLU (Gießen))
Prof.
Wolfgang Kuehn
(JLU Giessen)
Zhen-An Liu
(IHEP Beijing)
