An Unconventional Approach for a Straw Tube-microstrip Detector

We report on a novel concept of silicon microstrips and straw tubes detector, where integration is accomplished by a straw module with straws not subjected to mechanical tension in a Rohacell r lattice and carbon fiber reinforced plastic shell. Results on mechanical and test beam performances are reported on as well. PACS.: wire chambers, straw tubes, HEP detectors, silicon detectors, silicon microstrips, beauty quark, CP violation. Submitted to Transactions on Nuclear Science ∗ Permanent address: “La Sapienza” University Rome. ∗∗ Permanent address: ENEA Frascati. ∗∗∗ Permanent address: “Federico II” University Naples. 1 CONCEPT Modern physics detectors are based on tracking subcomponents, such as silicon pixels and strips, straw tubes and drift chambers, which require high space resolution, large geometrical acceptance and extremely large-scale integration. Detectors are often requested demanding requirements of hermeticity and compactness that must satisfy the minimization of materials. We have developed an integration solution that accommodates straw tubes and silicon strips in a common structure. Our novel design utilizes straw tubes mechanically non-tensioned and embedded in a Rohacell r lattice. 2 BTEV DETECTOR Experiment BTeV[1] at the Fermilab proton-antiproton collider Tevatron produces and studies the elementary particles composed of the heavy quark beauty, in order to investigate the phenomenon called CP violation, and understand if the Standard Model of particles and interactions is sufficient to describe the world we live in. BTeV is composed of tracking detectors (pixel, strips, straws) for detection of charged particles, RICH Cerenkov detector for identification of pions, kaons and protons, crystal EM calorimeter for detection of neutral particles (photons and π), and muon detector.