Data Acquisition System for the TPC Sector Test

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Data Acquisition System for the TPC Sector Test

• Klaus Schossmaier
• CERN EP-AID
• ALICE TPC collaboration meeting
• GSI, Darmstadt, Germany
• 2-3 June 2003

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Setup in Hall 167
gas vessel readout chamber electronics data
acquisition

• auxiliary
• systems
• - gas
• - cooling
• - low voltage
• - high voltage

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Readout close-up
Inner Readout Chamber (IROC)
Front End Cards (FEC)
Data Acquisition System (DAQ)
Readout Control Unit (RCU) in a PC
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Present DAQ
Front-end bus (GTL) Local slow control (serial)
FEC
128 CH
FEC
128 CH
PCI board from PLDA custom-made mezzanine card
RCU 1
FEC
128 CH
PCI
Ethernet
PC
FEC
128 CH
LabView
Online monitoring http//mactpc01.cern.ch/tpc
Cosmic trigger 1 event in about 4 minutes Event
size 128450010 bits 312 KB
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Detector Data Link (DDL)

• The DDL will be installed between the detectors
  and the front-end computers.
• The DDL is an integral part of the ALICE data
  acquisition system.
• The DDL provides up to 200 MB/s bandwidth.
• The DDL consists of three parts
• Destination Interface Unit (DIU) on the
  front-end computers ? connected via the RORC
  (pRORC or HLT-RORC)
• Multi-mode optical fiber cable to bridge up to
  200 meters, full duplex LC connector
• Source Interface Unit (SIU) on the detector
  electronics ? connected to the RCU (prototype 1,
  2, 3)

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DDL hardware
DDL-DIU with pRORC
Fiber cable (5 meters)

• pcald09.cern.ch
• PII_at_300Mhz
• 256 SDRAM
• 2x 40 GB disk
• Fast Ethernet
• RH 7.3.2

DDL-SIU
This system is ready for operation!
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Planned DAQ with DDL
RCU 3
RCU 3
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Towards the final DAQ

• More realistic setup with respect to
  installations at Test Beams or at Point 2
• Data stream over a long distance
• Electronics can be controlled remotely
• PC with LabView is not necessary
• High bandwidth upstream and downstream
• Scalable to more RCUs and FECs
• Early integration of front-end electronics with
  theALICE data acquisition system
• All components are ready
• DAQ milestone 388 of ALICE

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DATE

• The Data Acquisition and Test Environment is the
  software framework of the ALICE DAQ.
• It runs on Linux platforms.
• The latest release is V4.6 ? users guide
  available
• Well tested (test beams, data challenges)
• Services/Packages
• System configuration
• Run Control
• Readout for DDL
• Event Building
• Event Recording
• Messaging system
• Performance monitoring

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DDLDATE Performance
10.0 µs
12.5 µs
16.7 µs
25.0 µs
50.0 µs
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FeC2

• The DDL is capable to Control and Configure the
  Front-end electronics ? integration with the ECS
• Protocols are defined for 4 basic transactions
• Sending commands (19 bits information)
• Reading status (19 bits address, 19 bits reply)
• Sending data blocks (19 bits address, file to
  send)
• Reading data blocks (19 bits address, file to
  read)
• Interpreter is implemented for executing scripts
• Example of a FeC2 script

FeC2
define THRESHOLDS /local/thresholds.data write_blo
ck 0x600 THRESHOLDS read_and_check_block 0x600
THRESHOLDS stop_if_failed -1 write_command
0x1ff stop
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Data Quality Monitor MOOD
Using data of TPC sector test
z distance (no cluster finding) Total
charge Event size distribution Time
projections

• ROOT based
• Offline files
• Online DATE

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Working steps

• Installation of PCs with Linux and DATE
• 1 PC with 2 DDLs for Hall 167
• 1 PC with 1 DDL for the TPC lab
• Integration DATE ? DDL ? RCU in the TPC lab
• Stable data stream with high performance
• Controlconfiguration of the final RCU prototype
  via DDL and FeC2
• Integration of the full DAQ chain in Hall 167
• Installing the PC and the 2 DDLs
• Configuration
• Test runs
• Production runs
• Online Monitoring
• Analysis

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Summary

• A planned DAQ setup by using the DLL for the TPC
  sector test in Hall 167 has been presented.
• Hardware/software components of the new DAQ
• Hardware
• DDL SIU, DIU, fiber cables
• RORC pRORC, HLT-RORC
• RCU prototype 1, 2, 3
• PC Linux, disks, networking
• Software
• DATE readout, recording, services
• FeC2 control/configure the front-end electronics
• MOOD data quality monitoring
• Online monitoring software can be reused
• Lets start the work!