Transcript Clear Fiber and Wave Guide Fab.

Clear Fiber and Wave Guide Fab.
Makoto YOSHIDA (Osaka Univ.)
July 14-17 MICE FT workshop @FNAL
Components
(5 SciFi stations in multiplex case)
•
SciFi station <-> Service hole on flange
– 18 holes/connector x 12 connector/plane x 3 planes/station x 5 stations = 3240
clear fibers (+ 360 connectors)
•
Flange <-> VLPC cassette
– 18 holes/connector x 12 connector/plane x 3 planes/station x 5 stations = 3240
clear fibers (+ 180 connectors)
– 3240/126 = 26 D0 connectors
– 26/8 = 4 VLPC cassette
D0 connector
Clear Fiber
• Kuraray round-type multi-clad s-type
– cladding size: 6% of diameter
– tolerance of diameter: 2.5% (at 3s)
• Diameter : 0.35 mm x 3 = 1.05 mmf
– 7-SciFi-Multiplexed layout
• Costs: 2$/m???
– (2m+4m)x6480x2$/m=78,000$
Waveguide Fabrication
• trial to glue clear fibers on connector
– REPIC
• reinforcement by plastic tube
– CI Industry
• polishing contact face
REPIC
Polishing Contact Face
optical cement
epoxy glue
diamond machine
& polishing
Test items for clear fiber
• w/o VLPC in Japan
– Light shielding
– Dead channel (Construction efficiency)
– Attenuation in fiber
• 2m / 4m / 6m
– Multiplex feasibility
• 1.05mmF / 0.35mmF
– Transmission at contact face of 18-hole connector
– long term bending test
• w/ VLPC in FLNAL
– Uniformity (accuracy of fiber alignment)
– Light yield in SciFi
– Noise from RF
Prototype for September test
1.05mmF x 4m
3.5 views
42x18x4m=3024m
D0 connector
1.05 mmF x 18
x7
x6
VLPC
cassette
x7
(7 views
84x18x4m=6048m)
1.05mmF x 2m
fiber will be shielded by ZipperTube
1.05mmF x 6m
1.05mmF x 2m
x3
intermediate fibers
0.35mmF x 4m
0.35 mmF x 126
Schedule
• Clear fibers will be delivered by the end of July (7/21)
• Assembling of fibers will be done before the middle of
August.
• Basic tests (quality, alignment, attenuation) will be
finished and waveguides will be shipped to FNAL in
August.
Proposal for mass-production
• CI Industry can produce 18-hole opt. connector by machining (not
molded).
– Easy to control quality.
– Cost: 20,000$ / 2000 connectors
• sampling test of clear fiber
– measure diameter to determine margin of connecter hole
• change SciFi diameter : 0.350  0.300 mmF
– avoid loss at connectors
– smaller modify on D0 connector
– to fit diameter of fibers between D0 connector and VLPC