Feb 15 – 19, 2016
Vienna University of Technology
Europe/Vienna timezone

The Belle II SVD Data Readout System

Not scheduled
Vienna University of Technology

Vienna University of Technology

Gusshausstraße 27-29, 1040 Wien
Board: 82
Poster Electronics


Richard Thalmeier (Austrian Academy of Sciences (AT))


The Belle II Experiment at the High Energy Accelerator Research Organization (KEK) in Tsukuba, Japan, will explore the asymmetry between matter and antimatter and search for new physics beyond the standard model. 172 double-sided silicon microstrip sensors are arranged cylindrically in four layers around the Belle-II collision point to be part of a system, called the silicon vertex detector (SVD), which would measure the tracks of the collision products of electrons and positrons. A total of 1748 radiation-hard APV25 chips read out 128 silicon strips each and send the analog signals by time-division multiplexing out of the radiation zone to 48 Flash Analog Digital Converter Modules. Each of them applies processings to the data; for example, it uses a digital finite impulse response filter to compensate line signal distortions, and extracts the peak timing and amplitude from a set of data points for each hit, using a neural network. We present an overview of the SVD data readout system, along with aspects like sensor material budget, sensor mechanics, the CO2 cooling system, radiation hardness, front-end electronics, cabling, power supplies, data processing, and electromagnetic compatibility characteristics.

Primary author

Richard Thalmeier (Austrian Academy of Sciences (AT))

Presentation materials