The ATLAS Trigger/DAQ Authorlist, version 1.0

This is a reference document giving the ATLAS Trigger/DAQ author list, version 1.0 of 20 Nov 2008

The ATLAS trigger - high-level trigger commissioning and operation during early data taking

The ATLAS experiment is one of the two general-purpose experiments due to start operation soon at the Large Hadron Collider (LHC). The LHC will collide protons at a centre of mass energy of 14~TeV, with a bunch-crossing rate of 40~MHz. The ATLAS three-level trigger will reduce this input rate to match the foreseen offline storage capability of 100-200~Hz. This paper gives an overview of the ATLAS High Level Trigger focusing on the system design and its innovative features. We then present the ATLAS trigger strategy for the initial phase of LHC exploitation. Finally, we report on the valuable experience acquired through in-situ commissioning of the system where simulated events were used to exercise the trigger chain. In particular we show critical quantities such as event processing times, measured in a large-scale HLT farm using a complex trigger menu

The ATLAS Trigger/DAQ Authorlist, version 3.0

This is the ATLAS Trigger/DAQ Authorlist, version 3.0, 11 September 200

The ATLAS Trigger/DAQ Authorlist, version 2.0

This is the ATLAS Trigger/DAQ Authorlist, version 2.0, 31 July 200

The ATLAS Trigger/DAQ Authorlist, version 3.1

This is the ATLAS Trigger/DAQ Authorlist, version 3.1, 17 September 200

New Geometry of Muon Walls in October 1997 Tilecal Beam Test

Computer controlled positioning system of muon walls is described. Suitable setting for the leakage detection during the extended barrel module 0 beam test is explained in details. Contents 1 Introduction 2 2 Remote control of muon walls 2 2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Muon wall positioning 9 3.1 Pseudorapidity scan . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Scan at ` = \Gamma90 deg . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3 Non-projective scan . . . . . . . . . . . . . . . . . . . . . . . . . 10 3.4 Manual positioning . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4 Response to the muons 11 5 Summary 12 6 Acknowledgements 12 A Muon wall data in the standard NTUPLEs 13 1 1 Introduction The muon walls [1] were newly equipped with a motor movement and a remote control for Tilecal 1997 beam test of two extended barrel modul..

Muon Walls Performance in 1998 and 1999 Tilecal Beam Tests

Muon walls setup for beam test of the TILECAL barrel module~0 in June-July 1998 and July 1999 is described. The walls are remotely operated and their setting for hadronic shower leakage detection is described. The low energy tail suppression for events without leakage is illustrated

Remote Control of Muon Walls in the Extended Barrel Module 0 Tilecal Beam Test July -- August 1997

New computer controlled positioning system of muon walls is described. Suitable setting for the leakage detection during the extended barrel module 0 beam test is explained in details. Contents 1 Introduction 2 2 Remote control of muon walls 7 2.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.2 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3 Muon wall positioning 9 3.1 Pseudorapidity scan . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.2 Scan at ` = \Gamma90 deg . . . . . . . . . . . . . . . . . . . . . . . . . 9 3.3 Non-projective scan . . . . . . . . . . . . . . . . . . . . . . . . . 9 4 Response to the muons 12 5 Summary 14 6 Acknowledgements 14 1 Introduction The muon walls [1] were newly equipped with a motor movement and a remote control for Tilecal 1997 beam test of two extended barrel modules 0, the lower one BCN and the upper one ANL, see Fig. 1. This paper concerns only the July - August test beam period,..