Abstract
This paper describes the integration structures for the silicon strips tracker of the ATLAS detector for the Phase-II upgrade of the Large Hadron Collider (LHC), also referred to as High-Luminosity LHC (HL-LHC). Silicon strip sensors are arranged in highly modular structures, called 'staves' and 'petals'. This paper focuses on the prototyping effort developed by the strips tracker barrel community, as well as on the description of one of the latest stave prototypes. This new prototype is composed of a particular core structure, in which a shield-less bus tape is embedded in between carbon fiber layups. Electrical and thermal performances of the prototype are presented, as well as a description of the assembly procedures and tools.
Highlights
The inner tracker of the present ATLAS detector has been designed and developed to function in the environment of the present Large Hadron Collider (LHC)
At the next-generation tracking detector proposed for the High Luminosity LHC (HLLHC), the so-called ATLAS Upgrade, the particle densities and radiation levels will be higher by as much as a factor of ten
Similar electrical behavior has been observed for all three stavelets: an overall input noise increase of ∼ 20 e− for threshold scans at 1 f C injected charge is observed with respect to the same individual modules mounted on test frames, prior
Summary
The inner tracker of the present ATLAS detector has been designed and developed to function in the environment of the present Large Hadron Collider (LHC). The design of the ATLAS Upgrade tracker has already been defined It consists of several layers of silicon particle detectors. In response to the needs of the strip region for the upgraded tracker, highly modular structures are being studied and developed, called ”staves” for the central region (barrel) and ”petals” for the forward regions (end-caps). These structures integrate large numbers of sensors and readout electronics, with precision light weight mechanical elements and cooling structures. An alternative integration concept for the ATLAS Upgrade strips tracker is the so-called ‘supermodule’ concept Detailed studies for this approach are published elsewhere [3]
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