The Micro Vertex Detector of the CBM-Experiment

Abstract

The CBM experiment will investigate heavy-ion collisions at beam energies from 8 to 45 AGeV at the future accelerator facility FAIR. The goal of the experiment is to study the QCD phase diagram in the vincinity of the QCD critical point. To do so, CBM aims at measuring rare probes among them open charm. In order to identify those rare and short lived particles despite the rich combinatorial background generated in heavy ion collisions, a micro vertex detector (MVD) providing an unprecedented combination of high rate capability and radiation hardness, very light material budget and excellent granularity is required. In this work, we will discuss the concept of this detector and summarize the status of the R&D.

A fast centrality-meter for heavy-ion collisions at the CBM experiment

“…CBM is a fixed target experiment that can be configured for electron-hadron measurements as well as muon-hadron measurements. A micro strip detector based Silicon Tracking System (STS) [42,43] reconstructing momenta and tracks of charged particles is one of the key components of the CBM experiment. The STS comprises of 8 equidistant planar detector stations placed from 30-100 cm downstream the target.…”

“…The STS provides a single hit resolution of 25 µm and a momentum resolution of 1%. The CMOS pixel based Micro Vertex Detector (MVD) [43] is designed to reconstruct open charm decays with a secondary vertex resolution of 50 µm. MVD comprises of 4 silicon pixel layers located 5-20 cm downstream the target.…”