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PACKAGED FRONT END COOLING TEST. The Front Ends of the Outer Tracker are closely packed, heat must be extracted with cooling water along the Aluminium cooling extension plate. For the test we use a cooling block with forced air Several sensors monitor heatup of components.

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Packaged front end cooling test
PACKAGED FRONT END COOLING TEST

The Front Ends of the Outer Tracker are closely packed, heat must be extracted with cooling water

along the Aluminium cooling extension plate. For the test we use a cooling block with forced air

Several sensors monitor heatup of components.





Asdblr as temperature sensor
ASDBLR AS TEMPERATURE SENSOR

~750mV

~1.8mV/C

We use a dummy input

diode as temperature sensor

(Not callibrated yet)


Ntc 5k on copper surface close to asdblr
NTC 5K on Copper Surface Close to ASDBLR

Each oard has a sensor

Connection point


Otis ntc
OTIS NTC

NTC UNDER OTIS ON OPOSITE SIDE



Results after settling
RESULTS AFTER SETTLING

H

K

NI

EF

35 C

Otis52 C

ASDBLR NTC on copper 42C

ASDBLRInput Diode43C

Proto Outer Tracker Front-End Tests

9


First impression from paper recorders after power switch on
FIRST IMPRESSION FROM PAPER RECORDERS AFTER POWER SWITCH ON

OTIS Copper NTC 52C

50

17C

45

RED ASDBLR NTC ON Copper Board SURFACE 42C

ASDBLR

40

BLUE ASDBLR DIODE ~43C

8C

BASEPLATE THERMOMETER 35C

35

COOLING BASE

30

REMARKS:

1.forced air cooling base with regulators, shifts 10C

2.ASDBLR steps up 5C in 2 minutes, then settles to 7C above plate

3. OTIS settles 17C above cooling flap part of baseplate

25

1

2

3

6

12 Hours

t=0 >power on


First conclusions
FIRST CONCLUSIONS

The ASDBLR has low temperature rise thanks to strong thermal coupling trough PCB Delta T=7 degrees C

The maximum delta T is 17 degrees C for the Otis chip

The regulators are mounted directly on the cooling plate , no internal sensor available, but adequate cooling is ok.


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