The Silicon Vertex Detector of the Belle II Experiment
Gehalten von DI Dr. Thomas Bergauer, DI Dr. Markus Friedl, DI Christian Irmler, DI Manfred Valentan, Mag. Immanuel Gfall, Annekathrin Frankenberger am 15.06.2011 bei ÖPG-Tagung 2011
After ten years of successful operation, the Belle experiment at KEK (Tsukuba, Japan) was completed in summer 2010. Now, a major upgrade of the KEK-B machine is foreseen until 2014, aiming at a final luminosity of 8 x 10^35 / (cm^2 s), which is about 40 times higher than the previous peak value. Consequently, also the Belle experiment needs to be changed and the Silicon Vertex Detector (SVD) in particular will be completely replaced as it had already operated close to its limits in the existing system.
The future SVD will consist of four layers of double-sided silicon strip detectors like the present one, but at higher radii, because it will be complemented by a two-layer Pixel Detector as the innermost sensing device. The future SVD will be entirely composed of silicon sensors made from6" wafers read out by APV25 front end chips that were originally developed for the CMS experiment at the LHC.
Several years of R&D effort led to innovations such as the Origami chip-on-sensor concept and readout electronics with hit-time finding which were successfully demonstrated on prototypes. These features will be included in the final system which is presently being designed. This poster will give an overview of the future SVD and results from prototype tests ranging from detector modules to back-end electronics, also including the concepts for mechanics and CO2 cooling.
Kategorie: Konferenzvortag (contributed)