FEE + ROC cooling
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FEE + ROC cooling
S. Popescu CERN, U. Frankenfeld, H.R. Schmidt GSI
12.2.2004 TPC meeting 2
IROC in Thermal Box + 4 FEC (3.1)
Lauda System
PUMP
IROC
Lauda System
T8T9
T10
T12
T13
T11
T7 T6T5
Inside: Sensors on pad plane
T8
FEC
T14T15
Separate cool. circuits for chamber + FEC
Sensors on FEC cool. plates
~10cm ~10cm
12.2.2004 TPC meeting 3
FEC
IN
Thermal Box T=21 ˚C
Chamber cool. T=21˚C
Cooling In
Temp sensors
PS
Cooling Out
12.2.2004 TPC meeting 4
Input Cooling circuit
Output Cooling circuit
Cham
ber
Coolin
g c
ircu
it
4 FEC (3.1)~10.5 W/card(3.2: ~6.9 W/card)
T11
T9 T10
T12
IROC
12.2.2004 TPC meeting 5
ELMB
PT1000 two wire sensors connected
Can Bus port
12.2.2004 TPC meeting 6
Cooling plate
Inner screws
T14
12.2.2004 TPC meeting 7
Single card w/o inner screws
LV OFF LV ON
ΔT ~5.5 ˚C
ΔT c
oolin
g p
late
s
12.2.2004 TPC meeting 8
Card w/o inner screws in set-up
LV ON LV OFF
ΔT ~4 ˚C
ΔT c
oolin
g p
late
s
12.2.2004 TPC meeting 9
Single card with all screws
All screws in
ΔT ~1 ˚C
ΔT c
oolin
g p
late
s
12.2.2004 TPC meeting 10
Chamber cooling
~ 50 minutes
Cc off Cooling circuit on
chamber
Pad
12.2.2004 TPC meeting 11
Chamber cooling
• All circuits 21˚C• Chamber
21 -> 19.5 ˚C
ΔT ~1.5 ˚C
chamber cooling
chamber
pads
12.2.2004 TPC meeting 12
Chamber cooling
• All circuits 21˚C• Gradients on
the pad plane
ΔT ~0.08 ˚C
pad under FEC
pad
12.2.2004 TPC meeting 13
ΔT ~0.18˚C
Δt ~ 30 min
LV OFF LV ON
Heat transfer to pad plane
Pad under FEC
12.2.2004 TPC meeting 14
Heat transfer with cable
• Chamber 21˚C• FEE cooling 19˚C• Thermal box 21˚C
Heat transfer: ~0.19˚C
pad under FEC
pad
LV ON | LV OFF
12.2.2004 TPC meeting 15
Heat transfer without cable
• Chamber 21˚C• FEE cooling 19˚C• Thermal box 21˚C
Heat transfer: ~0.15˚C
pad under FEC
pad
LV ON | LV OFF
12.2.2004 TPC meeting 16
Compensation 19-24 ˚C
LV OFF LV ON LV OFF
FEC cool:T=19 ˚C T=24 ˚C T=19 ˚C T=24 ˚C
12.2.2004 TPC meeting 17
Temperature cooling FEE 19->24 ˚C
ΔT ~ 0.14˚C
pad under FEC
pad
12.2.2004 TPC meeting 18
Compensate: Switching ON
ΔT ~ 0.05˚C
pad under FEC
pad
12.2.2004 TPC meeting 19
Compensate: Switching OFF
pad under FEC
pad
FEC cool. temperature (scaled)
12.2.2004 TPC meeting 20
Compensate: Switching OFF
ΔT ~ 0.06˚C
pad under FEC
pad
12.2.2004 TPC meeting 21
Compensation (16-21˚C)
LV OFF LV ON LV OFF
FEC cool: T=21˚C T=16˚C T=21 ˚C
12.2.2004 TPC meeting 22
Compensation (16-21˚C)
ΔT ~ 0.05˚Cpad under FEC
pad
LV ON LV OFF
12.2.2004 TPC meeting 23
Summary + Conclusion
• Setup with 4 FEC (Ver. 3.1) 10.5 W per Card• Heat transfer between both sides of cooling plates
thru screws: Single sided cooling? • Chamber circuit for stabilization not compensation
– Time constant Δt ~ 50 min
• Heat transfer FEC -> pads– Time constant Δt ~ 30 min– ~0.19 ˚C with cable– ~0.14 ˚C without cable
• Compensation with Cooling temperature per sector– Test setup: Compensation on pads with ΔT ~ 0.05 ˚C
FEE + ROC cooling update
S. Popescu CERN, U. Frankenfeld, H.R. Schmidt GSI
12.2.2004 TPC meeting 25
IROC in Thermal Box + 15 FEC (3.1)
Lauda System
PUMP
IROC
Lauda System
T8T9
T10
T12
T13
T11T7 T6T5
Inside: Sensors on pad plane
T8
Separate cool. circuits for chamber + FEC
~10cm ~10cm
12.2.2004 TPC meeting 26
Setup
• 15 FEC ver. 3.1• 10.5 W/card
– ver. 3.2: ~6 W
• Test of single side cooling
• Simulation of OROC• 15 cards:
– 3.3V: 40A– 4.3V: 8A
• Voltage drop:– 0.5 V@40A (2m)
12.2.2004 TPC meeting 27
12.2.2004 TPC meeting 28
15 cards no chamber stabilization
LV: ON OFF Half ON OFF
12.2.2004 TPC meeting 29
15 cards chamber stabilization
LV: ON OFF HALF ON OFF
12.2.2004 TPC meeting 30
IROC
ΔT ~ 0.43˚C
LV:OFF ON OFF
12.2.2004 TPC meeting 31
IROC single sided
ΔT ~ 0.62˚C
LV:OFF ON OFF
12.2.2004 TPC meeting 32
IROC half power
ΔT ~ 0.24˚C
LV:OFF half ON OFF
12.2.2004 TPC meeting 33
OROC simulation
12.2.2004 TPC meeting 34
OROC
ΔT ~ 0.31˚C
LV:OFF ON OFF
12.2.2004 TPC meeting 35
OROC single sided
ΔT ~ 0.60˚C
LV:OFF ON OFF
12.2.2004 TPC meeting 36
Summary
• Chamber stabilization important• IROC double: ~0.43 ˚C• IROC single: ~0.62 ˚C• OROC double: ~0.31 ˚C• OROC single: ~0.60 ˚C• IROC double half: ~0.24 ˚C