Speaker
Allan Clark
(University of Geneva)
Description
The current ATLAS Inner Detector (ID) was designed to survive a luminosity of 2x1034 cm-2s-1 at the CERN LHC. Following the phase 2 of the LHC machine upgrade, called High Luminosity LHC (HL-LHC), the peak luminosity will reach 5x1034 cm-2s-1 and the delivered integrated luminosity will increase by a factor of 10. To maintain the tracking performance in a severe radiation environment (up to 1015 1MeV neutron equivalent at 38cm radius) and increased track occupancy, a new ID will be constructed, using silicon pixel and micro-strip technology.
Important micro-strip specifications include the sensor granularity, and a small material budget. Short strips of ~2.4 cm length are considered for the three innermost layers while longer strip of about ~9.6 cm is considered for the two outermost layers. The higher granularity requires investigating new powering and data transmission schemes to limit the material budget in the tracking volume.
A module granularity of about 10x10 cm2 is defined by the six-inch wafer sensor diameter and allows the construction of a “super-module” of up to 16 double-sided modules. This promising concept allows full Z-coverage while keeping high modularity and rework ability up to the last integration step during construction.
Prototype double-sided modules have been fabricated that meet the required performance specifications of signal gain and noise, as well as reasonable specifications of thermal management, material budget and mechanical stability.
A super-module concept has been investigated with demonstrators to prove the feasibility of a stiff but low material local support together with the end-insertion and locking mechanism to a barrel structure allowing a flexible integration.
This presentation will cover the super-module program R&D description, the key features, recent progress and future proposed developments towards the construction of a new ID for the ATLAS experiments.
Author
Allan Clark
(University of Geneva)
Co-authors
D. Ferrere
(University of Geneva)
D. La Marra
(University of Geneva)
F Cadoux
(University of Geneva)
G. Barbier
(University of Geneva)
G. Iacobucci
(University of Geneva)
K. Hanagaki
(Dept. of Physics, Osaka University)
K. Hara
(University of Tsukuba)
M. Endo
(Depat. of Physics, Osaka University)
M. Pohl
(University of Geneva)
M. Weber
(Unuversity of Geneva)
S. Gonzalez Sevilla
(University of Geneva)
S. Terada
(KEK)
Y. Ikegami
(KEK)
Y. Takubo
(KEK)
Y. Unno
(KEK)
