Hybrid Thermal Testing

UCSB Cold Box


    The hybrid cold box was designed to test 
CMS outer barrel hybrids at temperatures of 
-20 degrees celsius.  It accomplishes this via 
slow control hardware that is interfaced to a 
computer with slow control and testing software. 
The software was designed by CERN and Aachen and
modified at UCSB; it is available via the links 
    The tests detect open and shorted 
channels in the hybrids and determine whether
the hybrids will fail to initialize at -20 degree
celsius.  This is the temperature that the CMS 
detector will operate at in order to minimize 
radiation damage to the silicon.




Software and Documentation