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Strip and Pixel Detectors for Particle Physics



  Strip and Pixel Detectors for Particle Physics  
  The neutron is a neutral particle slightly heavier than the proton and contained in the nucleus of any atom apart from hydrogen. As a free particle it is unstable and decays with an average lifetime of about 15 minutes into a proton, an electron and a neutrino. Free neutrons can be obtained from a suitable nuclear reaction.   Artist’s view of the ATLAS inner detector  
  The research reactor Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II) at Technische Universität München employs nuclear fission with moderation to provide intense beams of free neutrons for neutron scattering and particle physics experiments. Studies of decay properties of this nuclear particle offer unique opportunities to investigate strength and details of the weak force responsible for radioactivity.  
  The work on strip detectors is a smooth continuation on previous work of our group which has seen the introduction of strip detectors into HEP, the first double sided strip detectors, a new method of biasing for capacitive coupled strip readout and guard ring structures for avoidance of electrical breakdown. The MPI HLL was deeply involved in the ALTAS project namely the inner detector (Figure on the right) with its silicon tracker (SCT), based on silicon strip detectors and the vertex detector, based on hybrid pixel detectors.
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Photo of ATLAS inner detetcor 40 middle modules assembled on an end cap disk