AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40
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Message ID: 723     Entry time: Sun Jun 24 09:08:03 2018
Author: 3OH, TD 
Subject: June 2018 New Stack Configuration 
Stack has been changed in configuration from a 6 DSSD stack to 8 DSSD stack.
What was detectors 1-6 are now 3-8 with 2 new detectors added to the front.

The stack order is now:
    DSSD 1 3058-25 Top
    DSSD 2 3058-2
    DSSD 3 3058-4
    DSSD 4 3058-3
    DSSD 5 2998-23
    DSSD 6 3058-5
    DSSD 7 3058-6
    DSSD 8 3058-7  Bottom

To handle the new detectors an additional 4 FEE modules 8 FEE64 were installed in the system with MAC addresses:
    FEE 25 - 2B 09 E7
    FEE 26 - 2B 22 55
    FEE 27 - 2A F6 D4
    FEE 28 - 2A ED 8F
    FEE 29 - 2A D0 1A
    FEE 30 - 2B 33 0C
    FEE 31 - 2A B6 45
    FEE 32 - 2A B2 B2

FEE Mapping is now:
                FEE Number
    DSSD     A    B    C    D
     1       25   28   30   31
     2       26   27   29   32
     3       1    20   22   23
     4       2    19   21   24
     5       9    12   14   15
     6       10   11   13   16
     7       17   4    6    7
     8       18   3    5    8

     All 4 new p side cables were made using 33" ribbon cables
     The n side cables for detector 2 were made using 37" cables
     The n side cables for detector 1 were made using 39" ribbon cables (37" was to short)

     Non-isolated cables related to C connector on DSSD

     The detectors were placed inside the snout with two reference lines for insertion.
     The first labelled as June 18 6 stack will place the centre of the detector stack (Between detectors 5 and
6) in the centre of BRIKEN
     when inserted up to this line.

     Distance from edge of BRIKEN to centre is 37.5cm

     The second mark is 1cm along from this and is labelled June 18 8 stack. This positions the centre of the
stack (Between detectors 4 and 5), what would be 3 and 4 if only 6 detectors)
     in the centre of the BRIKEN array.

     One thing to note is that with 8 detectors getting the snout on is a tight fit and can push down the rods
the detectors are held on. This was previously
     a friction fit between the rods and the snout base. The rods had to be pulled out slightly to allow for the
extra length needed for 8 detectors.
     To aid in the rods were not slipping grub nuts were moved to the bottom and locked in position. This may
not hold the strain of someone pushing the snout against them so caution
     is still advised when putting this on.

     When in the 8 stack configuration DSSD 1 is 4.5cm from the end of the snout. To support more detectors
longer rods would be needed though.
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