1. The LAr ROD Project and Online Activities Arno Straessner and Alain, Daniel, Annie, Manuel, Imma, Eric, Jean-Pierre,... Journée de réflexion du DPNC Centre de Rencontre de Cartigny July 2 nd, 2004

2. The LAr ROD Project - Arno Straessner2 The ATLAS Liquid Argon Calorimeter The ROD motherboard is used in the readout of all Liquid Argon calorimeter components and in the Tile Calorimeter The construction of the Calorimeters is well advanced Start first commissioning phase in March 2005 Insertion of the Solenoid in the Barrel Cryostat

3. The LAr ROD Project - Arno Straessner3 The ROD Motherboard Each ROD board is connected to 8 Front-End boards The incoming data is analysed in the Processing Units The output data is sent via Transition Modules to a Read-Out PC PU1 PU2 PU3 PU4 8 optical input links Data output to Transition module FEB raw data Calculated Quantities 16 bits at 80 MHz 32 bits at 40 MHz

4. The LAr ROD Project - Arno Straessner4 Prototype and System Testing at the EMF 9 prototypes built Extensive tests on single board level in Geneva Complete system test: Back-End Crate Test at EMF ►Many tests done: Data transfer in normal and staging mode (2 PUs) 3 boards operated simultanously Power consumption ►More important tests to be done until September: Data transfer at full rate with Optimal Filtering and Calibration code Synchronisation with trigger system (TTC) Send real and monitoring data through VME →Verify correct hardware functionality / extend and debug software Injector ROD PC Optical splitter

5. The LAr ROD Project - Arno Straessner5 Real Data Taking at the Testbeam ROD is used in ATLAS combined testbeam FEB readout of LAr module Readout system like in ATLAS detector Difficult startup phase Many software upgrades ● Crate with 2 ROD boards at combined testbeam LAr testbeam module

6. The LAr ROD Project - Arno Straessner6 Calibration and Normal Data Data is stored by ROS PC Analysis is done with ATLAS software ATHENA First data: noise RMS in FEB channels DAC=500 27 samples Calibration pulses FT1-FT5 1.0<  <1.2

7. The LAr ROD Project - Arno Straessner7 Online Monitoring Online monitoring is part of ATHENA software package “development done by a pool of detector experts and online experts” Very useful to quickly analyse incoming data Examples: Software test with 2002 TB data Monitoring at 2004 combined testbeam

8. The LAr ROD Project - Arno Straessner8 Status of The ROD Motherboard Project ►Current activities: System tests at EMF and testbeam to finalize the design Extension and debugging of the firmware: input FPGA, output controller, VME interface ►Transition to next project phase: ROD motherboard production ►The ROD system had a Production Readiness Review last week ►Main results: we can start purchasing the board components The board assembly shall wait until all important tests are finished

9. The LAr ROD Project - Arno Straessner9 Production Activities In The Near Future Order all components through CERN and store them Find a company for the board assembly → CERN Price Inquiry Order PCB boards Finally: 250 ROD motherboards will be assembled (April ’05) Then we are done? No... Installation of temperature sensors and cooling plates Serial test of 125 modules with test bench in Geneva (March – Mai ’05) OK KO OK

10. The LAr ROD Project - Arno Straessner10 Other Responsibilities Purchase and installation of 16+1 ROD VME crates We buy the ROD cooling system

11. The LAr ROD Project - Arno Straessner11 Summary The ROD prototypes are working well in test stand and at test beam → no hardware changes expected The ROD project is going into production phase Serial testing and assembly in spring 2005 will be a demanding task Schedule in time to deliver a ROD system for detector commissioning