Download - R&D FOR HIGHLY GRANULAR CALORIMETERS
R&D FOR HIGHLY GRANULAR CALORIMETERS
Roman Pöschl on behalf of the CALICE Collaboration
- Need excellent jet energy resolution to separate e.g. W and Z boson in their hadronic decays- 3%/Ejet-4%/Ejet which is two times better than at LEP or SLC- Physics goals at future lepton collider requires highly granular calorimeters
W, Z separation in the ILD concept
Large R&D program of CALICE Collaboration
Hadron showers in great detail
Motivation – Precision physics at future lepton colliders
Different stages of a hadron shower
Counting track segments
Particle separation4D reconstruction – Time structure of hadron showers
Unravelling the origin of electroweak symmetry breaking
Analysis of beam test data and simulation studies
Electromagnetic calorimeters
Tungsten as absorberSilicon or scintillator as active medium0.18x.0.18x0.2 m3 of detection volume equipped with up to 10000 cells
Different technologies under one roof
Hadron calorimeters
Steel or tungsten as absorberScintillator as active medium orGlass RPCs a active mediumRPCs allow for realisation of detectionvolume with ~480000 calorimetric cells in 1m3 World record!!!!
- Construction of prototypes- Technological challenges - SiPM, power pulsed electronics- (Combined) beam tests with prototypes since 2004 at CERN, DESY and Fermilab
Primary particleSecondaries
1st Interaction2nd Interaction