Temperature dependence of pixel multichip module operating performance

At Fermilab, a research program to develop a pixel detector for the BTeV experiment has been ongoing for the last several years. The basic building block of the pixel detector is the pixel multichip module. Prototypes have been built and characterization tests have been performed to verify that the pixel module will meet the stringent requirements of the experiment. One of these requirements is that the operating temperature of the detector will be at -5degreesC, which imposes severe constraints on the pixel multichip module packaging design. This paper presents the temperature dependence of prototypes of the pixel multichip module.