xtal_response_fix.pdf This page describes the failure of the HE channels of a single GCFE. There are 3072 GCFEs in CAL, two for each of the 1536 xtals.
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case == bad plus-face HEX8 && bad plus-face HEX1 && ! plus-face HE autoranging disabled /* this is the case for the current failure and current configuration */ /* if one of the HEX ranges is best range, fix it */ /* if plus-face first range == (HEX8 || HEX1), calculate E using the opposite face and the externally provided longitudinal position clear the bad energy bit set the externally provided longitudinal position bit set the failure-mitigation energy bit */ case == bad plus-face HEX8 && bad plus-face HEX1 && plus-face HE autoranging disabled /* this is the case for the current failure, but it requires a configuration we have not used */ /* if LEX1 is best range and saturated, fix it */ /* if plus-face first range == LEX1 && plus-face > 4050 (i.e. saturated), calculate E using the opposite face and the externally provided longitudinal position clear the bad energy bit set the externally provided longitudinal position bit set the failure-mitigation energy bit */ case == bad plus-face LEX8 && bad plus-face LEX1 && bad plus-face HEX8 && bad plus-face HEX1 /* this is the case we may get to soon if this GCFE continues to degrade and the LE ranges fail */ /* in all cases, calculate E using the opposite face and the externally provided longitudinal position clear the bad energy bit set the externally provided longitudinal position bit set the failure-mitigation energy bit */ |
Fix for Failed Electronics on Cal Crystal
Slides for fixing Cal Response for T4L2C4