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Endcap Alignment

Endcap Alignment. EMU Alignment DAQ Muon Alignment EDR Feb. 28, 2002 Outline: Components to be read-out or controlled (See D. Eartly’s talk for details of the front end hardware) General layout of FE and DAQ hardware Software Issues: Current Status plans and summary.

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Endcap Alignment

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  1. Endcap Alignment • EMU Alignment DAQ • Muon Alignment EDR • Feb. 28, 2002 • Outline: • Components to be read-out or controlled (See D. Eartly’s talk for details of the front end hardware) • General layout of FE and DAQ hardware • Software Issues: • Current Status • plans and summary

  2. Devices to be Readout • DCOPS sensors: • 36 per layer (6 x 1/2-SLM lines, each with 6 sensors including both on the transfer plate) • 6 sensors on each MAB daisy chained and communicate with 2 serial lines daisy chained and communicate with 2 serial lines • Analog sensors: • 60 ADC channels (for ME2, 3, and 4) • > 144 ADC channels for ME1 area (12 more) • One Agilent DAU handles 60 ADC channels. Each DAU communicates with 1 serial line • Switching lasers (Agilent DAU) : • 12 channels (SLM) per layer, 12 (possibly 24) axial ch.

  3. Number of Serial lines

  4. General Layout

  5. Characteristics • All the components above the serial hub (device specific below) are generic standard plug-ins. • Device specific readout system is designed to be modular (equal vertical slices) and easily expandable. This allows developing software, testing and commissioning of the detector much simpler. • Use of commercially available hardware (serial hub, Aligent DAU, ethernet hub, router/gateway, etc…) • Data path in the low level should be protected from the outside network traffic, however, the DAQ operation system must be easily accessible. • Relatively inexpensive.

  6. Serial Hub & Agilent DAU

  7. Software Issues • Operating System: Linux • Language: c with gnu compiler • network protocol: TCPIP • DCS interface: DIM socket connection • rawdata: input to COCOA for the fast alignment reconstruction of chambers. • Rawdata Exchange: • Most of the rawdata are totally internal to the EMU system and no need for data exchange between the subsystems. Only a very small amount of MAB DCOPS sensor rawdata for the barrel system are possibly being read out by the EMU DAQ.

  8. Software Issues (Cont.) • Input to EMU Chamber Reconstruction (COCOA): • Input to the EMU reconstruction program requires some information from the link system (link COCOA output) together with EMU raw data. • Output of COCOA: • Most of the data needed to be exchanged between the subsystem are not raw data but COCOA output. • The output of the alignment reconstruction program must be easily interface to: • Trigger alignment input • Offline muon track reconstruction (ORCA) • (see P. Ace’s Reconstruction Software talk for more details)

  9. Expected Raw Data Size • DCOPS sensors (8 words per sensor): • 36 sensors per layer (4 layers in each side) • 6 sensors on each MAB (36+6)*2*8*2 = 672*2 B • Analog sensors: • 60 ADC channels (for ME2, 3, and 4) • 144 ADC channels (for ME1) • (60*3+144)*2*2= 648*2 B approx. 5kB/event one event/min (over estimate) approx. 6 MB/day (very small)

  10. Current Status • Basic DAQ design is finished and tested • We have, currently, a set of necessary hardware elements to test/develop a modular and expandable DAQ system. • Router/Gateway (1) • Rocketport Serial Hub (2) • Agilent DAU (2) • DCOPS readout electronics (multiple number of DSP cards, Interface cards). • We have made and successfully tested a simple C program to readout both DCOPS and Agilent DAU. It works under Linux OS using a setup with all the basic readout hardware components listed above. We have been using above setup to test/debug our FE.

  11. Near Future Plans for DAQ • Continue to develop the DAQ software to add more functionalities. • Modify RS232 to RS422 readout at the serial hub (at a moment, using RS232). • We need to look into more on: making sure this DAQ configuration works with the nominal cms operating conditions, such as magnetic field and radiation. • Get ready for the 2004 magnet test. (see more on next page) • Implement DCS connection.

  12. DAQ Magnet Test Plan • Should be able to read out the full EMU alignment system using the hardware and software components for EMU DAQ described above. • Some of the ‘nice’ functionalities of DAQ (GUI, DCS connections, Database access, etc.) may not be ready, yet. But that should be ok for this test. • The software must be developed enough that during the magnet test we can have fast feed-back from the data taken. This means that the interface between raw data and COCOA, and COCOA software must be well established enough that we can get fast feed-back from COCOA output (results of muon alignment reconstruction).

  13. EMU DAQ Summary • We have completed and tested the basic DAQ design with a modular expandable unit successfully. • We have been using the setup to test/debug FE. • We are in a good shape to carry on developing our readout system.

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