Endcap Alignment

1
Endcap Alignment

• EMU Alignment DAQ
• Muon Alignment EDR
• Feb. 28, 2002
• Outline
• Components to be read-out or controlled
• (See D. Eartlys 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)
• gt 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

Layer 1 Layer 2 Layer 3 Layer 4 MAB
Serial lines for DCOPS 2 (RS-422) 2 (RS-422) 2 (RS-422) 2 (RS-422) 2 (RS-422)
Serial lines for Agilent DAU 3 (RS-232) 1 (RS-232) 1 (RS-232) 1 (RS-232) 0
Total of serial lines 5 3 3 3 2
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. Aces 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

(366)282 6722 B

• Analog sensors
• 60 ADC channels (for ME2, 3, and 4)
• 144 ADC channels (for ME1)
• (603144)22 6482 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

1. Continue to develop the DAQ software to add more
   functionalities.
2. Modify RS232 to RS422 readout at the serial hub
   (at a moment, using RS232).
3. 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.
4. Get ready for the 2004 magnet test. (see more on
   next page)
5. 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.