  Hadron therapy is a novel treatment against cancer. The main advantage of
this therapy causes less side effect in comparison to X-ray irradiation
methods. Hadron therapy is just ahead of a significant breakthrough since this
technique can be more precise, applying proton computer tomograph (pCT) to map
the stopping power in the tissues. The research and development of a pCT
require a fast detector to measure the energy of hadrons behind the patient.
The best detector option is called hadron-tracking calorimeter, which consists
of sandwich layers of silicon tracking detectors and absorber layers. The
combination of measuring the trajectory (tracking process), and, in parallel,
the energy of relativistic particles, can provide high-resolution hadron
imaging. This semiconductor-based technology requires stable temperature and
homogeneous cooling. I have worked in the development of this detector in the
Bergen pCT Collaboration for two years. Last year my work was to investigate
the temperature distribution in the calorimeter and examine two cooling
concepts in detail. I performed both analytical and numerical calculations to
analyze the temperature distribution of the calorimeter. The final decision
about the design takes into account many engineering aspects, such as
reliability, flexibility, and performance.
