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) ![]() ![]() Date: 1st November 2012 | ![]() |
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) ![]() ![]() Date: 10th January 2013 | ![]() |
I | Attachment | History | Action | Size | Date | Who | Comment |
---|---|---|---|---|---|---|---|
![]() |
Superdrawer_architecture.pdf | r1 | manage | 132.2 K | 2016-08-17 - 13:20 | PawelKlimek | |
![]() |
Superdrawer_architecture.png | r1 | manage | 142.9 K | 2016-08-17 - 13:20 | PawelKlimek | |
![]() |
tile_frontend_cartoon.pdf | r1 | manage | 77.6 K | 2016-08-17 - 13:26 | PawelKlimek | |
![]() |
tile_frontend_cartoon.png | r1 | manage | 119.4 K | 2016-08-17 - 13:26 | PawelKlimek |