Speaker
Ms
Shaifali Mehta
(PhD)
Description
Ladder assembly for the Silicon Tracking System of the CBM
Experiment
• SHAIFALI MEHTA for the CBM collaboration = Physikalisches Institut der Tübingen =
GSI Helmholtzzentrum fur Schwerionenforschung GmbH, Darmstadt
As the core detector of the CBM experiment at FAIR, the main task of the Silicon Tracking
System (STS) is to reconstruct the trajectories and measure the momentum of the charged
particles in A+A collision at rates up to 10 MHz.
The detector comprises of 896 detector modules, based on double-sided silicon microstrip
sensors distributed on 8 tracking stations. Each module consists of sensors, read-out cables
and the front-end electronics. These modules are mounted onto 106 carbon fibre space frames,
forming detector ladders. To study the feasibility of assembling modules onto the ladder, a
precision-machined tool has been designed and one half of the longest ladder variant has
been assembled with 5 non-functional modules. After the assembly, a contactless optical
survey of modules onto ladder is employed with a precision of ±10 μm. Using the same
assembly technique a ladder was built with two functional modules for the mini-STS detector
demonstrator. Studies with real components have demonstrated that the procedure works
as intended and yields the targeted mechanical tolerances of the sensor positions (in order of
100 μm). The aim of the poster is to give an overview of the results from the ladder assembly
technique.
Primary author
Ms
Shaifali Mehta
(PhD)
