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click here to access the web pages of the follow-up HadronPhysics3 activity ULISINT (2012 - 2014)

Welcome to the web page of the

Joint Research Activity ULISI

"Ultra-light silicon tracking and vertex detection systems for frontier precision experiments"
within the EU-FP7 Project HadronPhysics2 "Study of strongly interacting matter"

ULISI explained to the public

A brief description of the research activity and the motivation of its participants (pdf)

Project Details

Duration: 01/01/2009 - 30/06/2011 (extended to 31/12/2011)
Web portal of HadronPhysics2 (link)
Project description of JRA ULISI (link) (pdf) and Budget (pdf)
Milestones and deliverables: as in HP2 documentation (pdf) and updated (pdf)


GSI Darmstadt (J. Heuser, spokesperson), INFN Torino (A. Rivetti), CNRS Strasbourg (M. Winter), GUF Frankfurt (J. Stroth), FZJ Jülich (T. Stockmanns), UBO Bonn (K.-T. Brinkmann), and technology partners: SE SRTIIE Kharkov (V. Borshchov), INR Kiev (V. Pugatch), IMEC Leuven (P. De Moor)

Research Objective

Large-area silicon detector systems for tracking and vertex detection are of central importance to frontier precision hadron physics experiments. Examples are the CBM and the PANDA projects planned at the international research facility FAIR. Their physics with rare probes (e.g. open charm) demands for unprecedented silicon detector performances. One of the key requirements is an ultra-light-weight construction of the detector systems as a whole, essential for high-resolution determination of the particles momenta and the vertex identification of short-lived decays. This is particularly challenging because in the new experiments high particle multiplicities (up to 1000 per event) and high nuclear interaction rates (up to 10 million per second) require a large number of fine-pitch detector channels equipped with fast and thus power dissipating front-end electronics. The necessary cooling infrastructure would introduce an excessive material budget in the tracking system aperture, making the required high-resolution momentum and vertex measurements impossible if the detector systems were built similar to current state-of-the-art designs realized e.g. in tracking detectors of LHC experiments at CERN. In this research activity we propose to explore new innovative technologies and system concepts to demonstrate that high-performance, ultra-low-mass detector systems for tracking and vertex detection can be built compatible with the large-area requirement. This will be addressed in three R&D projects each focusing on a different system challenge.

R&D activities, timeline

  1. An innovative thin microstrip tracking detector system for large-area coverage (link)
  2. A thin fast hybrid pixel detector system for tracking in high particle densities (link)
  3. An ultra-thin monolithic pixel detector system for decay vertex identification (link)


  • ULISI kick-off meeting, GSI Darmstadt, Germany, 17+18 February 2010 (link)
  • ULISI concluding meeting, Mont Saint Odile, France, 9 September 2011 (link)
  • Work meetings of the ULISI teams (link)


Reports on the research activities (link)

PhD theses

PhD theses related to the project's work: pdf doc

-- JohannMHeuser - 30 Jan 2012
Topic revision: r8 - 2013-07-02, JohannMHeuser
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