Heat transfer on D Zero Run2b stave

Lanfranco, Giobatta ; /Fermilab

Fermi National Accelerator Laboratory

关键词: Heat Transfer;    Experiment-Hep, Instrumentation;    Carbon Fibers;    Coolants;    Temperature Distribution Experiment-Hep, Instrumentation;   

DOI  :  10.2172/15017259
RP-ID  :  FERMILAB-TM-2298-E
RP-ID  :  AC02-76CH03000
RP-ID  :  15017259

美国|英语

来源: UNT Digital Library

【 摘 要 】

The temperature distribution on the silicon sensors and the cooling system performance for the D0 Run2b stave have been investigated. The tests have been carried out on a carbon fiber skin only stave, with and without heat input at two different chiller temperatures (-9.1 C and -19.1 C). For a bulk temperature of -14.5 C and a 14W total heat load, the stave surface has reached a peak temperature of +3.3 C, localized under the readout chip. The ''hot spot'' in the hybrid region extends about twice the length of the hybrid with an average temperature of about -4.6 C over this area. Beyond this the stave surface has a uniform temperature of -11.5 C. The film coefficient of the coolant has been calculated to be about 650W/m{sup 2}K using these measurements. A finite element analysis has confirmed the analytical calculations, providing a temperature profile consistent with what has been experimentally observed. A further finite element study has been performed in order to predict the temperature distribution in the actual stave design (46mm wide; kapton core skin; 950 {micro}m thick hybrid; 7.2mm x 1.8mm tube inner size; -15 C bulk temperature; 700W/m{sup 2}K film coefficient). The silicon temperature ranges from about -10.8 C far from the readout chips to about 0 C under them, the temperature drop between the sensor and the PEEK inner wall being 3 C and 10.5 C respectively.