Difference: ApprovedPlotsTileElectronics ( vs. 1)

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ApprovedPlotsTileElectronics

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Introduction

This page lists the public figures and schematics illustrating the detector electronics.

Electronics

The analog pulses from the PMTs undergo shaping and amplification in the 3-in-1 cards in two gains (low and high) with a ratio of 1:64. Low gain signals which are summed in groups by adder boards are provided to the Level 1 Calorimeter Trigger. The analog pulses are received by digitizer boards where the signal is converted into digital samples every 25 ns, which are stored in the front-end pipeline memories, the so called Data Management Units (DMU). Upon Level 1 accept, an event-frame-­selector selects high gain samples unless the highest sample is saturated in which case the low gain samples are used and stores them in a buffer. Event frames are pulled from the DMUs by the Interface card which formats the data and transfers the frames to the off-detector Read-Out Drivers (RODs).
Contact: Carlos.Solans@cern.ch and Alberto.Valero@cern.ch
Reference: ATLAS Tile weekly operations meting (01/11/12) ATL-COM-TILECAL-2012-048
Date: 1st November 2012
Diagram of the Tile front-end electronics
pdf
The front-end electronics is divided in eight identical Digitizer Boards reading 6 PMTs each. The analog pulses are received by the Digitizer Board where the signal is converted into digital samples every 25 ns, which are stored in the front-end pipeline memories in the the so called Data Management Units (DMU). Upon Level 1 accept, an event-frame-selector selects the samples and stores them in a buffer. Event frames are pulled from the DMUs by the Interface card which formats the data and transfers the frames to the off-detector Read-Out Drivers (RODs) through optical fiber. The Digitizers are chained to transmit the data from the outermost boards t the Interface Card placed in the center of the SuperDrawer. Low gain analog signals which are summed in groups by adder boards are provided to the Level 1 Calorimeter Trigger. The Trigger, Timing and Control (TTC) signals are received are received by the front-end through optical links in the Interface Board which broadcasts the signals to the Digitizer Boards.
Contact: Carlos.Solans@cern.ch and Alberto.Valero@cern.ch
Reference: ATLAS Tile weekly operations meting (06/12/12) ATLAS-PLOT-TILECAL-2012-013
Date: 10th January 2013
Architecture of the Tile read-out electronics
pdf

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