With evaporative cooling, the exhaust cooling pipes and their

1
TJF 04/05/07
SLHC - WP7 Barrel
LAYOUT OF SERVICES AT THE BARREL ENDS REALISTIC
ASSESSMENT OF THE SPACE ENVELOPE
outside Z 1000 and Z -1000
With evaporative cooling, the exhaust cooling
pipes and their connectors may be the limiting
factor. At this stage a possibility is to use
Swagelok VCR connectors as these are known to
work and can be fitted in restricted
spaces. Staubli connectors need further
assessment (forces etc).
The second major factor is the size of the Opto
PCB and the minimum bend radius of fibre ribbons
connecting to it. Cooling pipes will have to be
routed outside the PCBs in Z. PCBs will be a
considerable source of heat cooling pipe routing
could be utilised to cool them if not, then
there may have to be a separate cooling source
occupying more space. Allow for this and extra
services/grounding shielding etc.
2
List of services at barrel/stave end one
set for EVERY stave Option A has separate
connectors at end for opto and power.
see drawings of layouts slides 4 to
9 Cooling pipes One low mass U pipe unit per
stave to One 1/8th inch exhaust pipe with VCR
Swagelok connector One input capillary pipe with
VCR Swagelok connector Optical Readout BUS or
thin twisted pairs to optofibre ribbon Two PCBs
with MUX chips, laser driver, laser and
miniature optical connector (each board 100mm x
20mm x 5mm)(TW) Power cable connectors Two
interface connectors LMT BUS to round
cable (each connector very approx. 30mm x 5mm x
10mm) Sensor cable connectors thin twisted pair
cables? 1 cylinder surface temperature monitor
cable connector 1 gas volume air monitor
connector ( 10mm x 10mm x 5mm?)
TJF 04/05/07
3
TJF 04/05/07

• Option B has combined connector PCB at end for
  opto and power
• Suggested by Andy Nichols and Marc Weber
• Assume services are separate for top and bottom
  rows (20 top 20 bottom
• hybrids 2 hybrids per module)
• One bus cable terminating in one common PCB with
  chips (elec/opto
• converter) and connectors for 10 single module
  sides. ie 2 per stave
• Each connector PCB would have
• 20 DATA fibres
• CLOCK fibres
• COMMAND fibres
• 8 POWER traces
• 10 HV traces
• SLOW CONTROL traces
• 4 DSS/INTERLOCK traces

could be flex circuit
SEE DRAWINGS SLIDE 10 and 11
4
BARREL END view from outside end
cooling pipes
OPTION A Layout type 1 non-standard bus layout
power cables from front
readout optofibres from front or top
cooling input connector
input
2 readout PCBs connections
sensor connector
tape to power cable connectors
exhaust connector
exhaust
barrel flange
connector board support on flange
Bus housed in local support with strip links to
connectors on hybrid
SECTION through stave
cooling input
connector
cable
module
flat bus cable housing LOCAL support
flat cable
exhaust
rail guides integral with cylinder
TJF 04/05/07
5
optofibres from top or front (worst-
case)
R 490
barrel flange
module connector
OPTION A Layout type 1
OPTO PCB
cooling input
(side view)
100mm
power sensor cables
BUS
MODULE
opto
connectors sensors and power
30mm
power
cool out
R 380
barrel flange
Z1050
Z1040
Z1000
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6
barrel flange
barrel surface
OPTION A Layout type 1 non-standard bus
layout plan view single stave
connectors sensors and power
module connector
power sensor cables
power LMT
connector
cool input
optofibres from top or front worst case shown!
MODULE
opto PCBs
opto LMTs split off BUS
cooling pipes route out to cryostat
cool out
Z1040
Z1050
Z1000
TJF 04/05/07
7
cooling pipes
BARREL END view from outside end
OPTION A LAYOUT TYPE 2
readout/CC optofibres from front or top
power cables from front
power cable connectors
input
2 readout PCBs dogleg connections from LMT BUS
exhaust connector
sensor connector
barrel flange
ends of inner barrel PCBs
SECTION through stave
(or one bus top and one bus bottom)
cooling input
connector
cable
module
flat cable
exhaust
flat cable bus on module
rail guides integral with cylinder
TJF 04/05/07
8
R 490
readout/CC optofibres from top or front
barrel flange
OPTION A Layout type 2
power sensor cables
100mm PCB opto
cooling input
(side view)
LMT
connectors power
power
MODULE
readout/CC doglegs
connectors sensors
cool out
R 380
barrel flange
Z1040
Z1050
Z1000
TJF 04/05/07
9
barrel flange
barrel surface
OPTION A Layout type 2 plan view single stave
connector power
module connector
power LMT
power sensor cables
cool input
optofibres from top or front
opto PCBs
MODULE
cooling pipes route out to cryostat
cool out
connectors sensors
opto LMTs split off BUS
Z1050
Z1040
Z1000
TJF 04/05/07
10
OPTION B single board for all connections -
Andy Nichols and Marc Weber
breakable connectors
probably hard-wired
20 single DATA fibres or 3 x 12way ribbons (or 4
x 8 etc)
Z0
4 clock fibres
BUS serving 10 single module sides
4 command fibres or 1x 8way ribbon
4 power (out return) lines


10 HV lines
4 slow control

detector

hybrid
4 DSS/interlock
Z 1000 barrel end
electric opto board

could be one flex circuit
TJF 04/05/07
11
BUS CABLE suggestion Andy Nichols and Marc Weber
material Kapton with copper and or al
tracks size 35mm wide (estimate) and 300um
thick serves 10 single module sides and runs from
Z0 to barrel end terminates in one elec opto
converter board (see slide 10)
Z0
connector (everything)
MCC and SP chip
bus
hybrid
hybrid
detector
PCB
use same connector as for SCT dog-leg (wild
guess!) and SCT fibre sizes
bus
hybrid
(modules shown here are assumed to be overlapping)
TJF 04/05/07
12
TJF 04/05/07
Various concerns with this
size of PCBs will increase envelope in Z
size of bus increased length of hybrid
Z0
connector (everything)
MCC and SP chip
bus
hybrid
hybrid
detector
PCB
upper module
lower module
how can each bus connect to each hybrid access?
top layer bus bottom layer bus
hybrid
large numbers of connectors! chips near
connectors
13
Recommendations for Barrel construction with
reference to services connection at the barrel
ends Make both ends the same wrt distance of
edge of last module from the barrel ends in
Z. Barrel flange construction must be designed
to be strong enough to support 1 trellis for
PCBs, cooling connectors, power and sensor
connectors per stave. Flange surface needs to
be flat, with enough space and strength for extra
fittings/holes. All services should come
straight off barrel end all routing of
services in R/PHI should be done off the
barrel. Keep barrel surface near ends as clear
as possible. Design Interlinks to be as narrow as
possible.
TJF 04/05/07
14
Evaporative cooling pipes routing off barrel
end. input to stave
4 sets of six pairs per quadrant 6 pairs go to
one cooling channel on cryostat
0
22.50
0
11.25
Same for both Option 1 and Option 2
TJF 04/05/07
15
6 exhaust pipes go to each old cooling channel
exhaust manifold
6 input pipes go to each cooling channel on
cryostat will need to have manifolds
Evap. cooling routing off barrel end.
input exhaust will need Pressure Relief
Valves
0
22.50
0
11.25
TJF 31/05/07
16
ALL SERVICES on BARREL END as for Option 1 layout
2
Evaporative cooling pipes routing off barrel
end. input to stave
4 sets of six pairs per quadrant 6 pairs go
to one cooling channel on cryostat
pair of opto PCBs
LMT power connectors
0
22.50
0
11.25
sensor connectors
TJF 04/05/07
17
ALL SERVICES on BARREL END as for Option 1 layout
1
Evaporative cooling pipes routing off barrel
end. input to stave
4 sets of six pairs per quadrant 6 pairs go
to one cooling channel on cryostat
pair of opto PCBs end on
LMT power connectors
0
22.50
0
11.25
sensor connectors
TJF 04/05/07