Transcript FGT_elec_integration__MIT20081205

Doug, here are some slides
FGT Electrical Integration
MEASURED (GV) cable run 37 feet
[ West cyl → TPC sec 2/3 boundary
→ sec 2/3 tray out of magnet → 2nd
level platform ceiling tray → 3A9 ]
We must minimize the cable length!
GV, IUCF
12/5/08
FEE cable (each)
Signal:
15 twisted pairs (30AWG)
Power:
+1.8 V @ 0.90 A (fused for 3 A)
-1.8 V @ 1.56 A (fused for 5 A)
remote sense
FGT Cables
24 FEE signal & power combo
24 HV coax
(4 of each per disk)
8
2
Cable break connectors/boxes
located just outside of west support
cylinder, on TPC wheel. This point
also provides FGT detector ground
tie (to TPC wheel).
FEE cables at FGT will be custom
low-mass aluminum design with
silicone & FEP extruded insulation,
solder terminated (copper clad or
plated aluminum)
All standard cables will have the
required CL2 or CMG rating.
Custom cable shall be constructed
to meet the UL-1581 Vertical Tray
requirements, but not tested by UL
Wiener MPOD
controller
ISEG 8 ch HV
-4 kV @ 2 mA
Wiener crate
(FGT custom)
6U x 220mm cards
SGIS
(to kill all FGT power)
ethernet
208 V 1 φ
DDL fiber
trig/clk
ARC module
(APV Readout Controller)
[ANL]
ARM
(APV Readout Module)
[IUCF]
Power Dissipation
GV, IUCF
12/5/08
POWER SUMMARY (ENTIRE FGT)
240 APV CHIPS
74 W
24 VOLTAGE REGULATOR UNITS
33 W
24 GEM BIAS VOLTAGE DIVIDERS
24 W
TOTAL POWER IN WEST CYLINDER
131 W
FEE CABLES
25 W
READOUT MODULES
577 W
HV MODULES
250 W
CRATE PS LOSSES
240 W
MISC. EQUIPMENT, E.G., NETWORK
100 W
TOTAL POWER IN FGT RACK
1167 W
Rack Requirements
The FGT group has two basic requirements for electronics rack space:
GV, IUCF
12/5/08
• Minimum achievable cable length. This is crucial, because the analog signals are
driven directly from our readout ASIC’s (APV chips) on these cables, to be digitized in
the ARM modules. Longer cables means slower settling, more crosstalk, lower signal
to noise ratio, and greater danger of EMI troubles.
• Mounting space for
• 1 crate (8U height)
• reserve space for 1 additional crate (extra readout for extra disks or auxiliary
GEM detectors in STAR)
• 2 cable feedthroughs (3U each)
• 1 NIM bin
• 1 shelf for laptop similar to EEMC setup
• fiber “MIC” box
• ethernet switch
→ We need about ½ a rack for the FGT, either at 2A9 or (new) 3A9. In consultation
with operations group, the understanding is that the best option looks like a new rack
installed at 3A9. The height of 3rd floor racks will be chosen to just clear the doorway.
For FGT this rack could be air cooled, i.e., adequate ventilation in/out of the rack, but if
water cooling is required/desired by other considerations that is fine too.
(Remark: I believe that IST should similarly go in 3A1/3A2.)
A final decision by STAR Operations group on FGT rack allocation awaits cable length
tests by GV and rack drawings / cost estimates by JS. We need this by April ‘09.