FEE ROC cooling

1
FEE ROC cooling

• S. Popescu CERN,
• U. Frankenfeld, H.R. Schmidt GSI

2
IROC in Thermal Box 4 FEC (3.1)
Inside Sensors on pad plane
T8
T8
T9
T10
T13
T7
T6
T5
T12
T11
IROC
10cm
10cm
T14
T15
FEC
Separate cool. circuits for chamber FEC
Sensors on FEC cool. plates
3
Thermal Box T21 C
Cooling In
IN
Cooling Out
FEC
PS
Chamber cool. T21C
Temp sensors
4
IROC
Chamber Cooling circuit
T9
T10
T11
T12
4 FEC (3.1) 10.5 W/card (3.2 6.9 W/card)
Input Cooling circuit
Output Cooling circuit
5
ELMB
PT1000 two wire sensors connected
Can Bus port
6
Cooling plate
Inner screws
T14
7
Single card w/o inner screws
LV OFF LV ON
?T 5.5 C
?T cooling plates
8
Card w/o inner screws in set-up
LV ON LV OFF
?T 4 C
?T cooling plates
9
Single card with all screws
All screws in
?T cooling plates
?T 1 C
10
Chamber cooling
Cc off Cooling circuit on
50 minutes
chamber
Pad
11
Chamber cooling

• All circuits 21C
• Chamber
• 21 -gt 19.5 C

pads
?T 1.5 C
chamber
chamber cooling
12
Chamber cooling

• All circuits 21C
• Gradients on
• the pad plane

pad under FEC
pad
?T 0.08 C
13
Heat transfer to pad plane
Pad under FEC
LV OFF LV ON
?T 0.18C
?t 30 min
14
Heat transfer with cable
LV ON LV OFF

• Chamber 21C
• FEE cooling 19C
• Thermal box 21C

pad
Heat transfer 0.19C
pad under FEC
15
Heat transfer without cable
LV ON LV OFF

• Chamber 21C
• FEE cooling 19C
• Thermal box 21C

pad
Heat transfer 0.15C
pad under FEC
16
Compensation 19-24 C
LV OFF LV ON LV OFF
FEC coolT19 C T24 C T19 C
T24 C
17
Temperature cooling FEE 19-gt24 C
pad under FEC
?T 0.14C
pad
18
Compensate Switching ON
pad under FEC
?T 0.05C
pad
19
Compensate Switching OFF
FEC cool. temperature (scaled)
pad under FEC
pad
20
Compensate Switching OFF
pad under FEC
?T 0.06C
pad
21
Compensation (16-21C)
LV OFF LV ON LV OFF
FEC cool T21C T16C
T21 C
22
Compensation (16-21C)
LV ON LV OFF
?T 0.05C
pad under FEC
pad
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 ?t 50 min
• Heat transfer FEC -gt pads
• Time constant ?t 30 min
• 0.19 C with cable
• 0.14 C without cable
• Compensation with Cooling temperature per sector
• Test setup Compensation on pads with ?T 0.05
  C