Connector development
description
Transcript of Connector development
Connector development
M.Taguchi(kyoto)T2K ND280meeting@KEK Nov.7.2
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Contents
• MPPC new ceramic package• Prototype of connector• Reproducibility• Future development• Summary
MPPC new ceramic package
• New MPPC package delivered in Oct.• Baseline package for T2K
• We developed the connector to a fiber which match this package
6mm
4mm
sensitive region
Requirement to the connector
• light yield - alignment - minimize the distance b/w fiber and MPPC• Easy handling• Compact size• reproducibility• Low-cost• Detaching is possible
Prototype 1 ~2parts type~
• 2 parts• Touch the edge
of fiber to the surface of MPPC with screw
• It is impossible to screw when fiber and MPPC are fixed
MPPC
fiber
screw
Prototype 2 ~3parts type~fiber MPP
Cfixture
screw
• 3 parts• Touch the edge
of fiber to the surface of MPPC with screw
• It is possible to screw when fiber and MPPC are fixed
Reproducibility
+15%
-15%
light yield (arbi.unit)
2parts type
3parts type
light yield (arbi.unit)
blue LED
connector
reproducibility is better for 2parts type
WLSF
•measure the light from fiber, attaching and detaching the connector repeatedly
Characteristics of each connector
Type Light yield
Easy handling
cost reproducibility
size
2parts
Now studying
Bad ~0.1$
Good(~2%) 1x1cm
3parts
Now studying
Good ~0.1$
Bad(~10%) 1x1cm
the connector which have advantages of both types?
- good reproducibility 2 parts
- can connect the fiber and MPPC even if they are fixed
cap type package without screw
Cap Type Package( Rough draft )
• 2 parts• fixture for fiber
stops by friction against the fixture for MPPC
• use spring to touch the edge of fiber to the surface of MPPC
Spring
stop by friction.
fiber
we will make and test this soon
MPPC
Summary
• developed the 2 type of connectors which match the new ceramic package
- reproducibility is better for 2parts type - handling is easier for 3parts type• now consider new type of connector• measurement of PDE with connector is
on going
Supplement
Alignment
•make alignment of MPPC to a fiber with the outside frame of package HPK say this size is made with best precision
Setup for measurement of PDE with connector
blue LED
WLSF
connector
PMT
same amount of light
PDE(MPPC with connector) /QE(PMT) =
p.e.(MPPC)
p.e.(PMT)
setup for measurement of PDE
MPPC
PMT
1mmφslit
scan blue LED
WLSF
PDE(MPPC) /QE(PMT) =p.e.(MPPC)
p.e.(PMT)