ITk will be a full silicon tracker, with pixels for the 5 first layers and strips for the outer layers.

It is meant to be installed in ATLAS during the third long shutdown of the LHC (LS3) and to take data at the HL-LHC.

The LAPP in Annecy proposed in 2012 to incline the pixel modules in order to minimise the material budget and get close to an ideal angle between the tracks and the modules. The LPSC joined this proposal soon after. Today, two layouts are competing, the inclined one and the "extended" layout.

ATLAS ITK prototype


The physicists involved are Elisabeth Petit (coordinator), Johann Collot,  Fabienne Ledroit, Nathan Readioff (post-doc) and Jan Stark.

The services contributing are the SERM (mechanics), Service d'Electronique (electronics) and SDI (Detectors and Instrumentation). The technical coordinator is Ludovic Eraud.

The current contributions of the LPSC concern

  • prototyping of "mountains" and staves
  • R&D on Silicon Power Resistors for thermal testing
  • thermal and mechanical testing of the staves and flanges
  • R&D on module gluing
  • (soon) R&D on CO2 cooling
  • performance
  • ...



latest talk by Denis (Inclined meeting, Nov 4)