Speaker
Description
Last year we presented the use of diamond-like heat spreaders in the form of cheap Synthetic Graphite Tape (SGT) for cooling of instrumentation in radiation intense environments.The excellent double-sided taping capability of SGT allows to join the support, cooling pipes, sensors and hybrids, leading to "taped modules" without any screwing, which allows in turn for semi-automatic construction by simple one-axe gantries. Also thermal stressed are largely eliminated, since the graphene layers inside SGT allows for slight (reproducible and elastic) sliding of the parts on both sides of the tape. Here we want to discuss our experience with taped modules using the rather complicated CMS double-layer tracker modules as an example. We will discuss the art of construction of ultra-light CF-Airex sandwiches for the support, which were built with high precision in simple home-built thermal hot-presses (vacuum based, no hydraulics), the choice of sandwich materials for such hot-presses, the bending and gluing of hybrids on CF-sandwiches with techniques to avoid delamination in reflow ovens (at temperatures up to 285 $^0$C), the long-term stability and radiation hardness.
