Speaker
Dr.
Svetlana Kushpil
(Nuclear Physics Institute of the Academy of Sciences of the Czech Republic)
Description
Svetlana Kushpil on behalf of the ALICE Collaboration.
The ALICE (A Large Ion Collider Experiment) detector was constructed
to study the properties of hot and dense hadronic matter formed in
relativistic nuclear collisions. During the second long LHC shutdown in
2018-2019, the collaboration plans to upgrade the current vertex
detector, the Inner Tracking System (ITS), in order to increase the reconstruction accuracy of secondary vertices and to lower the threshold of particle transverse momentum measurement.
The upgrade strategy of ITS is based on the application of new
Monolithic Active Pixel Sensors (MAPS) designed in 0.18 um CMOS
technology. The 50 um thick chip consists of a single silicon die
incorporating a 18 um high-resistivity silicon epitaxial layer (sensor
active volume) and matrix of charge collection diodes (pixels) with
readout electronics. Radiation hardness of the upgraded ITS is
one of the crucial elements in the overall performance of the system.
A wide set of MAPS structures with different read-out circuits was
produced and is being studied by the ALICE collaboration to optimize the
pixel sensor functionality.
An overview of the ALICE ITS upgrade and the expected
performance improvement will be presented together with selected
results from thorough campaign that includes several irradiation and
beam tests.
| Presentation type | Section talk (10+5 min) |
|---|
Primary author
Dr.
Svetlana Kushpil
(Nuclear Physics Institute of the Academy of Sciences of the Czech Republic)
