ATLAS Upgrade Information

Introduction

SuperLHC (sLHC) luminosity upgrade from 10³⁴ to 10³⁵ is currently planned for 2016. This poses major challenges also to the detectors which also need to undergo major upgrades with costs at >200M CHF level for ATLAS. Among the detector upgrade projects:

Tracker upgrade: the entire ATLAS tracking system will be replaced with a new all silicon tracking system which is the largest piece of the upgrade. One of the main challenges is the very rad hard pixel sensors, with the leading candidate being the 3D sensors pioneered by Sherwood Parker et al with their base here at Stanford.
Trigger/DAQ: Major upgrades of the trigger/DAQ system and associated frontend electronics are inevitable. A major driving desire being considering to open up the bandwidth to 1MHz Level-1 trigger rate (from the current 100KHz).

There are also a number of current detector projects at various stage of development:

Pixel B-layer Replacement: The current pixel system inner most layer (B-layer) is expected to reach its radiation dose limit after 1 year at the design luminosity of 10³⁴ so that the replacement of the B-layer has always been in the plan and currently scheduled to be ready for Jan/2013.
Fast Track Trigger (FTK): This is a proposal currently being developed to add a Level-1.5 tracking hardware trigger for fast b-tagging, based on similar principle of the CDF SVT system. The faster processing to alleviate the pressure on the Level-2 system to hopefully allow larger fraction of the existing L1 rate to be processed for b-tagging at higher level.
FP420: Far-forward detectors at 420m from interaction point to reach for diffractive production of low mass Higgs. Utilizing the 3D silicon sensors as part of detecotr and <10ps precision fast timing to resolve interactions within bunch.