Status of the Dimuon Arm Tracking System

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Status of the Dimuon ArmTracking System
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OUTLINE

• Status of the detectors
• Station 1 status
• Station 2 status
• Stations 3,4 and 5 status
• FEE electronics
• MANAS
• MARC
• MANUs
• Read-Out (CROCUS)
• Services
• Integration
• Summary

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Station 1 status

• Concerns in 2003
• - gas tightness
• - low gain
• - gain inhomogeneity
• Extensive tests performed
• in-lab on quadrant 0
• Modifications of quadrant 0
• - use of a central spacer
• - improvement of the
• closure procedure

• Validation with radioactive source and with
  in-beam tests at PS in November 03

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Station 1 status
QUADRANT 0
Test on CH0 Chamber after 2nd Mounting
Before (241Am source)
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Station 1 status

• QUADRANT 0
• In-beam tests at PS
• (November 2003)
• - Gain increased by 1.5
• HV limit 75V higher
• Maximum gain 4 times
• higher

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Station 1 status

• New design for the
• stiffness reinforcement
• - Central spacer
• Foam thickness
• increased by 2x5 mm
• Frame thicknesses
• increased by 18 mm
• Technology modified
• for the vias
• - Construction of the
• quadrant 1 from July 03
• till the end of October

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Station 1 status

• Quadrant 1 performances
• The detector tested by means of a radioactive
  source gt gain dispersion in 13.5 (peak to
  peak)
• Gas leakage less than 9 ml/h
• Mass production
• Green light for construction of all the quadrants
• Most of the components ordered in December 03
• Construction of 4 quadrants/year gt end 2005
• Installation will start in the beginning 2006

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Station 2 status

• Quadrant 0 was constructed
• PRR took place at Kolkata in June 03
• In-lab tests
• Excellent gas tightness (leak rate lt 15 ml/h)
• No leakage current (a few nA)
• Total accuracy on 1120 mm PCB lt100 µm
• Planarity in 85 µm
• Good gain homogeneity ( 15 ) (measured with a
  241Am source)

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Station 2 status
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Station 2 status

• In-beam tests at PS on November 03
• Quadrant 0 results
• Good gain
• Residual problems (now fixed)
• Gluing of the anode wires
• Leakage current on a few decoupling capacitors
• Some short circuits in the exit boards

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Station 2 status

• Mass production is started
• All cathode and anode PCBs ready in April
• All kaptons with connectors soldered and tested
  by end of April
• Assembly of 4 quadrants in 2004
• Completion of the construction by fall 2005
• Installation in the cavern will start in the
  beginning 2006

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Stations 3, 4 and 5 status

• All the 4 construction sites are now identically
  equipped for the mass production of the slats
• All the components for starting the mass
  production sent in the labs
• Start of production in 3 labs done (Gatchina
  delayed till mid-March for practical reasons
  person availability, administrative procedures)
• 4 slats already constructed per lab. with small
  mounting process adjustments

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Stations 3, 4 and 5 status

• Mass production planning
• End of slat production
• Station 4 Nov. 2004
• Station 5 July 2005
• Station 3 Nov. 2005
• Spares Feb. 2006
• Frames
• First two frames for station 3 March-April 2004
• End of all the frame construction Nov. 2004
• Chamber assembly at CERN during 2005
• Installation in the cavern will start in the
  beginning 2006

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FEE MANAS

• Issue in 2003 MANAS never tested
• - 120 MANUs produced with MANAS and MARC3
• - in-beam tests with
• - slats at SPS in June
• - with quadrants of stations 1
• and 2 at PS in November

- Noise similar to GASSIPLEX when mounted on
MANU boards and plugged on the detectors 1000
electrons in realistic experimental conditions
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FEE MANAS
- Too large pedestal dispersion in the first
delivered batch Request for a smaller window
acceptation for the mass production (20 to 140
mV)
- Too large gain dispersion (s13) -
Request for a smaller spread (5 peak to
peak) - Absolute necessity for
calibration of all the channels with 1
level accuracy
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MANAS performances
With gain correction
Without gain correction
s 170µm
s 75 µm
Results obtained at PS with quadrant 0 of station
1
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Station 1 results
Resolution obtained with an upper cutoff on the
measured charges
Efficiency in 1 mm without cutoff on the charges
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Station 1 results
Number of small pads hit versus the HV value
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Manas non-linear correction
Tests performed at SPS with slats - very few
multiple scattering - higher sensitivity for
studying fine effects like non linear responses
Calibration non-linear s 50 mm
Conclusion Gain calibration and linearity
measurements are mandatory
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MANAS Calibration

• Calibration issue
• Calibration measurements on board irrelevant due
  to the internal capacitance dispersion
• Proposed strategy
• - to measure the internal injection capacitances
  of all the channels
• - to calibrate the response function of all the
  channels
• How to do?
• - injection of a pulse via well known external
  capacitors
• - injection of a corresponding pulse via the
  internal capacitors
• - ratio gives the internal capacitance values

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MANAS Calibration
Construction of a test bench - careful
implementation to minimize parasitic
capacitances - calibrated capacitors at
2 level accuracy (attempt to find calibrated
capacitances at 1 level) - charge
injected between 0 and 500 fC -
possibility to test MANU12 and MANU 345
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MANAS Calibration
Internal capacitance measurements
on MANU12 MANU345
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FEE MANAS

• Calibration issue
• MANAS calibration should be achievable with an
  accuracy of 2.
• The parameters of this calibration (1 200 000
  channels) will be determined and
• stored by the factory in charge of the mounting
  of the MANU boards
• Conclusion
• - MANAS will be usable with some severe
  constraints
• - Chips have to fulfill acceptation criteria
  (pedestals, gains)
• - The calibration of all the channels has to be
  performed (if possible)
• - The knowledge of the mapping for the whole
  tracking system is mandatory (the location of all
  the MANUs on the different chambers has to be
  known)

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FEE

• MANAS production
• MANAS production launched (delivery of 70 000
  chips from September 04 till beginning 2005)
• Functionality tests will be done at the factory
• MARC production
• New iteration (MARC4) completed and tested
• 1500 chips produced
• Mass production (20 000 chips for diµ arm) was
  launched and the chips should be delivered in
  October 2004
• Tests of the chips will be done at the factory

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FEE MANUs
Electronics PRR held at CERN on 22 October
(MANAS) and at Orsay on 27 November

• A preproduction of 250 MANUs is being done after
  some minor corrections
• Tendering for mass production is starting
• Mass production between fall 2004- mid 2005
  (8000 MANU12 and 11000
• MANU345)
• Tests and calibrations performed by the factory
  (test bench provided by the collaboration)

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READ-OUT (CROCUS)
J T A G
J T A G
J T A G
J T A G
J T A G
J T A G
J T A G
J T A G
J T A G
J T A G
Front board
Front board
Front board
Front board
Front board
Dsp Analog Device 21160 BGA 400 Pins at 80Mhz
J T A G
J T A G
EEPROM
Concentrator board
FPGA SIU Interface
SIU INTERFACE BOARD
Debug
TO TCI
FPGA TRIGGER
Trigger config
DDL to RORC
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READ-OUT (CROCUS)

• All the components of a prototype are ready
• - Crate and back panel
• - Concentrator board
• - Frontal board
• All the components already tested
• (with SIU)
• Final software is being implemented
• CROCUS should be validated in
• realistic experimental conditions
• in July and September at SPS
• Iteration at fall 2004, then
• mass production

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SERVICES

• TRIGGER DISPATCHING
• Role to decode the signal from the CTP and
  dispatch it on all the Front End cards
• Decoding card with TTCRx chips will be bought at
  CERN
• Prototype of dispatching cards are designed and
  are currently being fabricated
• LV power supplies
• A Wiener LV Power supply prototype was tested
  with very good results
• New design studied by Wiener with CERN but new
  concern with the magnetic field (200 G)
• Purchase on wait for the CERN final choice
• HV power supplies
• CAEN 1527 have been chosen (same concern with the
  field)
• HV distribution device for increasing the
  granularity is launched

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INTEGRATION

• STATIONS 1 AND 2
• Support and services designs for the stations 1
  and 2 will be completed end 2004
• Construction beginning 2005
• Preliminary mounting in lab mid 2005
• Mounting in cavern beginning 2006

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INTEGRATION

• STATIONS 3, 4 AND 5
• Rails, toolings
• - Design of rails and toolings for chamber
  assembly and
  installation completed and sent to
  industry for final drawings
• - Installation of the first part of rails
  cooling higher part for
• ST3 foreseen in Aug 04.
• - Install. last part rails and cooling ST3
  Apr. 05
• - Install. rails ST4 and 5 on superstructure
  cooling Sept. 05
• - Start install. chambers Dec. 05- Jan. 06
  
• Services (LV, HV, R/O, gas...) integration
• - Design is well advanced will be
  completed during 2004
• - Connecting boxes (between cables from
  supplies and cables from detectors) are not yet
  designed.

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Rails of Station 3
General view
SuperStructure
Dipole
1.Fixed part
Muon Filter
3.Removable part
2.Curved part
Absorber
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Summary of installation scenario in cavern
12/Introduction in Dipole
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SUMMARY

• All the PRRs were held before the end of the year
  2003
• Main concerns are now fixed
• Mass production for the detectors is starting
• Mass production for components launched.
• FEE production will start after tendering
• Integration is on track