atlas trt barrel design review, 1998 barrel trt electronics cooling chiho wang duke university

ATLAS TRT BarrelDesign Review, 1998

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Barrel TRT Electronics Cooling

Chiho Wang

Duke University

ATLAS TRT Barrel Design Review, 1998



Motivation: Overheating of electronics causes

premature failure

Requirements: 60 mW per channel Total for type 1 module ~ 20 W Want operating T < 50 ºC

Heat Transfer Path: Heat generated by components on

ASDBLR & DTMROC stamp board through stamp board/banding through legs/sockets into (tension plate/) cooling plate to cooling tube/coolan



Current Duke Prototype: 1.3mm Aluminum cooling plate 5/32” Aluminum cooling tube tension plate thermal insulation box additional sensors/readout



From Lund: Simulated ASDBLR & DTMROC

stamp boards Simulated roof boards Temperature readout and display

software



Results of tests: (coolant at 14 ºC) 1.3 mm cooling plate + all sockets:

ASDBLR: 46 ºC DTMROC: 48 ºC roof boards: 38 ºC cooling, tension plates: ~ 27 ºC

(Typical range: ± 2 ºC)




Conclusion: 1.3mm Aluminum cooling plate is

sufficient to reduce electronics temperature < 50ºC

Study of using 1mm Aluminum cooling plate in progress (type 3 module).



Remaining issues/improvements: Mass production of tubing Attachment of tubing/channel Heat transfer banding/legs/sockets Replacement of aluminum cooling

plate by pyrolytic graphite (PG): Motivation: Need to reduce

material to get acceptable radiation length



Properties of PG material: Made by pyrolysis of hydrocarbon

gases in a vacuum furnace Thermal conductivity(in-plane):

PG ~ 400 W/m-K compare: Cu ~ 400, Al ~ 200

Expensive ~ $150k for barrel (PG) ~ $ 50k with aluminum

Machinability / gluing? We are exploring

atlas trt barrel design review, 1998 barrel trt electronics cooling chiho wang duke university

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