Testing of PMT dividers

New version of the active base

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  Fig. 1 Connectors on the new base

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  Fig. 2 Connectors on the new base

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  Fig. 3 Extension of the PCB to accommodate the new connector

Test

Bench tests

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  Fig. 1 Setup for testing PMT dividers

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  Fig. 2 Bypassed amplifier, small amplitude

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  Fig. 3 Bypassed amplifier, large amplitude

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  Fig. 3 Amplifier gain 3, small amplitude

Study noise inside FCAL

Installing 5x5 prototype on CCAL

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  Fig. 1 - Front view of the CCAL

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  Fig. 2 - Rear view of the CCAL

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  Fig. 3 - List of modules installe

Cables, and patch panels

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  Fig. 1 - Cables connected to the FCAL2 dividers (signal, HV, and LV)

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  Fig. 2 - Cables connected to the FCAL2 dividers (signal, HV, and LV)

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  Fig. 3 - Closer look of dividers

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  Fig. 4 - Patch panels: LV distribution for the 5x5 prototype (right)

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  Fig. 5 - Patch panel from the outside of the CCAL (the MPOD connector is on the left)

Tuning dividers after the CCAL beam test

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  Fig. 1 Original base before saturation

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  Fig. 2 Original base, A = 1.8 V

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  Fig. 3 Modified OPS