Rearranging FCAL cables

Calorimeter Layout

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  Fig. 1 FCAL layout

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  Fig. 2 FCAL 2 layout

• List of modules in the FCAL & FCAL2

VXS crate layout

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  Fig. 1 Twelve FCAL VXS crates

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  Fig. 2 Connection of FCAL signal cables to 12 VXS crates. Red box denotes the FCAL insert region.

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  Fig. 3 Six FCAL crates on the north side. Circles denote crates connected to the FCAL2 insert region.

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  Fig. 4 Six FCAL crates on the south side. Circles denote crates connected to the FCAL2 insert region.

VXS crates connected to the FCAL2 insert region

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  Fig. 1 ADC channel assignment (rocfcal2, north)

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  Fig. 2 ADC channel assignment (rocfcal5, north)

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  Fig. 3 ADC channel assignment (rocfcal8, south)

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  Fig. 4 ADC channel assignment (rocfcal11, south)

• Blue region corresponds to ADC channels connected to the FCAL2 insert region (21x21 lead glass modules). Yellow boxes correspond to channels connected to the region outside the insert.
• 108 ADC channels in each of four crates are connected to the insert region
• 238 ADC channels are used in each crate

Possible rearranging of cables

• Move 108 channels from the rocfcal2 (rocfcal8) crate connected to the insert to the rocfcal5 (rocfcal11) crate. The total number of channels in this crate: 108 + 108 = 216 (connect to 14 FADCs), see Fig. 1
• Move 126 channels in the rocfcal5 (rocfcal11) crate connected to the insert to the rocfcal2 (rocfcal8) crate. The total number of channels in this crate: 130 (remaining) + 126 = 256 (connect to 16 FADCs), see Fig. 2. Connect 4 remaining cables to other crates, see Fig. 3

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  Fig. 1 rocfcal5 crate after re-cabling (216 channels, connected to all FCAL insert modules)

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  Fig. 2 rocfcal2 crate after re-cabling (256 channels, connected to all lead glass modules)

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  Fig. 3 rocfcal4 connect 4 lead glass channels to the new flash in Slot 19