Central Fiber Tracker Status

1
Central Fiber Tracker Status

• 8 layers
• Outer 6
• 2.52 m
• Inner 2
• 1.66 m
• r - .2 to .51 m
• Axial readout to south
• VLPC Readout
• Waveguide system
• 8-11.5 m
• Pipes light from detector to VLPCs

2
CFT Status - Tracker Mechanical
Complete
Global precision 33 mm (Measured vs Desired)
3
CFT Status - Tracker Mechanical

• Residual Stereo angle on axial layers was always
  a concern
• 4 mil end-end offset was spec -Trigger constraint

4
CFT Status - Tracker Mechanical
5
CFT Status - Waveguides

• Waveguide Production
• CPS complete (IU)
• Fiber pulling/sheathing at ND 75 complete for
  CFT
• Fiber sorted
• Best (attn.L from Kuraray) - longest runs
  8-11.5m
• FPS at IU
• CFT WG Connectorization
• At ND Fermilab IU
• Expect to complete production in August

6
CFT Status - Waveguides
7
CFT Status - Waveguide Routing

• Routing, strain relief, etc for CFT (CPS) design
  complete and most parts fabricated

8
CFT Status - Readout System

• VLPC Characterization/test/sort now complete
• Cassette Assignment
• As shown

9
CFT Status - Readout System II

• Cassette production
• Approximately 60-75 of sub-component complete
• 14 production cassettes complete
• All components in-house except Flex circuit
• Flex Circuit
• Production deliveries going well
• 850 of 2000 in hand
• 100/week

10
CFT Status - Readout III

• Cassette Test - Going Well
• Noise low
• Good uniformity

11
CFT Status - Cassette Production
12
CFT Status - Cryo

• Fabrication delayed by delivery of top plates
• Now in house
• To spec
• Making up some time
• Welding going well
• Final Cryo Operational in June

13
CFT Status - Electronics

• Analog Front-End (AFE) Board
• SIFT
• Trigger pickoff
• SVX
• Shares much with Silicon
• Sequencer
• L3 VRB
• Etc.
• Mixing Box
• Reorders optical signals into trigger towers
• Digital Front-End (DFE) Board

14
CFT Status - Electronics

• Analog Front End Board
• Pre-Production prototype under test
• First production boards available in mid-August
• Production 9/00-10/00
• Mixer Box
• Test prototype 8/00
• Production 10/00 - 12/00
• Digital Front End
• Mother Board and Daughter board prototype testing
  complete
• Tracking at 50 MHz
• Production has started
• First 10 mother boards here
• First daughter boards due in two weeks
• 8/00 - 10/00

15
CFT Status - Commissioning

• Commissioning has already started
• Lab 3 Cosmic Ray Test Stand
• Using both sequencer-L3 and stand-alone-sequencer
• Not using AFE boards
• Stereo Boards - SVX readout only, no MCM - no
  SIFT
• DAB commissioning
• Waveguide installation starts
• Plan to use SB
• IF prototype AFEs available will go with them
• Should have over 50 cassettes available
• Full commissioning will be driven by delivery of
  production quantities of AFE Board
• L1 trigger test to follow

127 cm
16
CFT Status
17
CFT Status - Schedule

• At lab 3 we currently are
• Installing silicon support structures
• CFT alignment fixtures (VSTAR targets for use at
  DAB)
• Final optical connector inspection
• Light and gas tighting
• Should be ready to move to DAB on or about June
  16, 2000
• Waveguide installation starts mid-August
• Waveguide fabrication should be essentially
  complete at this time
• Commissioning starts at this time

18
CFT Status - Conclusions

• CFT Mechanical construction is complete
• Mechanical assembly is to specification
• Move to DAB June 16, 2000
• VLPC Cryo
• VLPC characterization/selection complete
• 1024 channel cassettes working well
• Cassette production assembly underway
• Subcomponents 75 complete
• First 14 production cassettes assembled
• CFT Waveguide production
• Fiber pulling/sheathing going well
• Complete in mid-August
• Commissioning starts with waveguide installation
• 7.8M final cost
• Completed at Lehman 98 Baseline with No
  Contingency