K5-501
Electrical Readout at Liverpool
Ashley Greenall
22/10/02
K5-501 Outer Module using Melbourne Support Card
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Module mounted in Valencia Cooling Box
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Module mounted directly onto cooling block - no insulation layer added.
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Agnd connection to box.
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No common-mode chokes used.
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Melbourne Support Card - (Select = 1), Redundant data route.
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Nominal ABCD bias settings (FEShp = 30uA, FEBias = 220uA)
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Vdet = 120V, Idet = 0.49uA
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Thybrid = 31C
Results
Noise Occupancy scans with 17 masked channels as that used on the Test
Sector at CERN
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Redundant NoiseOcc.
Data was taken with the 'Wiggly' Kapton Opto-connector plugged into the
hybrid.
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Redundant Noise
Occ.as above but this time with Opto-connector disconnected.
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Redundant Noise
Occ.as above but this time with Opto-connector disconnected and no
Agnd connection from support card to module box (though there is a connection
from the module Agnd to the cooling block pin).
Conclusion
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K5-501 has been demonstrated to work electrically
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Module perfromance is:
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Front-end Input noise, Link0 = 1521e, Link 1 = 1504e; (specification
is <1500e)
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Gain, Link 0 = 50.3mV/fC, link1 = 50mV/fC (specification is 50mV/fC)
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Threshold variation (for TrimRange 0) , Link 0 = 2.01mV, Link 1 = 2.03mV.
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Noise Occupancy, for both Links 1.50x 10-5 - 1.78 x 10-5(specification,
after irradiation is <10-4)
K5-501 Outer Module using Liverpool Support Card
Same configuration as above. Testing using both the Redundant and Electro-Opto
data routes:
Redundant Data Results
Electro-Opto Data Results
Again the Electro-Opto perfromance is not as good when compared to using
the Redundant Data link but this problem is understood (jitter on the decoded
clock from the DORIC) and thus not unexpected.
Conclusion
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Results obtained here in Liverpool again indicate no problems in the electrical
readout of a K5.1 type module.
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Module characteristics are in close agreement with those obtained at CERN
when being readout electrically.
Ashley Greenall 22/10/02