L1Calo Documentation

Papers and Notes

The ATLAS Level-1 Calorimeter Trigger

A Primer to the ATLAS Level-1 Calorimeter Trigger. This paper describes the Calorimeter Trigger hardware, as installed in the ATLAS electronics cavern. 6 March 2008.

The ATLAS Level-1 Calorimeter Trigger: PreProcessor implementation and performance

This paper describes the architecture of the PreProcessor, its hardware realisation, functionality, and performance during Run 1. 12 December 2012.

Performance of the upgraded PreProcessor of the ATLAS Level-1 Calorimeter Trigger

This paper covers the PreProcessor new Multi-Chip-Module upgrade and its performance during Run 2. 8 May 2020.

Simulation and parametrisation of dynamic pile-up corrections in the ATLAS Level-1 Calorimeter Trigger

An internal note describing the parametrisation of the baseline corrections for ATLAS Monte Carlo simulation. 29 Jul 2015. - 58 p.

Update on the study and validation of the BCID of the L1Calo at very high transverse energies

An internal note which reviews the validation method used in 2010 to validate the bunch crossing, and which applies it to all periods of 2011 physics data taking. 15 Oct 2012. - 20 p.

Study and validation of the BCID of the L1Calo at very high transverse energies

An internal note which describes the various issues specific to bunch crossing identification for high energies and how the algorithms work together to ensure an optimal functioning. 19 May 2011. - 26 p. 

Timing Synchronization of the ATLAS Level-1 Calorimeter Trigger with Collision Data in 2010 and 2011

A public note summarising the improvement of the input timing over the course of 2010 and 2011, where 6 updates of the L1Calo precision synchronization plus 3 additional cross-checks based on the fit method were conducted for data from pp collisions. 06 Jun 2012. - 19 p.

A Fit Method for Input Signals of the ATLAS Level-1 Calorimeter Trigger

This internal note presents a fit method to derive the timing synchronization settings in the L1Calo PreProcessor hardware from LHC collision. 09 Nov 2011. - 35 p.

ATLAS Level-1 Calorimeter Trigger: Timing Calibration with 2009 LHC Beam Splashes

This public notes summarises the timing calibration using beam splash events provided by the LHC in November 2009. 30 Apr 2010. - 11 p.

Selected Technical Documents (Public)

The Pre-Processor Module (PPM) for the ATLAS Level-1 Calorimeter Trigger

A technical wrap-up of the design and functionality of the L1Calo PreProcessor module PPM.

Pre-Processor Asic User and Reference Manual v2.0 (v1.1)

The user and reference manual for the PreProcessor ASIC.

The Readout Manager FPGA of the ATLAS Level-1 Calorimeter Trigger PreProcessor

A user and developer manual for the PPM ReM FPGA.

Specifications and Technical Documents (KIP Login)

PreProcessor ASIC

Specification of the PreProcessor ASIC (PPrASIC) for the ATLAS Level-1 Calorimeter Trigger and related issues.

PreProcessor MCM

Specification of the Pre-Processor Multi-Chip Module (PPrMCM) for the ATLAS Level-1 Calorimeter Trigger and related issues.

PreProcessor nMCM

Specification of the New Pre-Processor Multi-Chip Module (nMCM) for the ATLAS Level-1 Calorimeter Trigger and related issues.

PreProcessor TREX

Specifications and pictures of the phase-1 PreProcessor Tile Rear Extension card TREX.

PreProcessor Readout Manager FPGA

Specification of the Pre-Processor Readout Manager FPGA (ReMFPGA).

PreProcessor Module

Specification of the Pre-Processor Module (PPM) for the ATLAS Level-1 Calorimeter Trigger and related issues.

PreProcessor System

Various documents related to the Pre-Processor System in the ATLAS Level-1 Calorimeter Trigger.

Installation at USA15

Cabling, installation and related issues to Receivers / PatchPanels / PPModules in USA15.

Discussion Notes

Design reviews, notes and presentations on the production status of the PreProcessor Modules.

Calorimeters

Documents related to the calorimeter and Trigger Towers.

Plots and Pictures

Miscellaneous plots and pictures of various hardware tests.

Additional Documentation (Old Websites)

LVDS Cable Driver (LCD) tests

Information about the LVDS Cable Driver (LCD) board on the Pre-Processor module (PPM).

Tile Calorimeter Trigger Signal Commissioning tests

Information about the Tile Calorimeter Trigger Signal Commissioning tests (CERN 18.-21. Oct. 2005)

Test Analogue Pulses

Pulses from different calorimeter modules recorded at test beam during September 2001 at CERN.

Chips

Manuals and other documentation about the ASICs developed by the Heidelberg ATLAS group.

Modules

Manuals for VME modules.

System

Various documentation about system aspects of the pre-processor system, architecture, overviews, etc.