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

Read more

Summary

INTRODUCTION

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]

STRIPS TRACKER BARREL PROTOTYPES
Short strips modules
Shield-less stavelet core
SHIELD-LESS STAVELET
Stavelet assembly and components
Test setup
Electrical performances
Thermal performances
Findings
CONCLUSION
Full Text
Published version (Free)

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call