# Quark Matter 2014 - XXIV International Conference on Ultrarelativistic Nucleus-Nucleus Collisions

19-24 May 2014
Europe/Zurich timezone

## Intermediate Silicon Tracker For STAR HFT Upgrade

20 May 2014, 16:30
2h

### spectrum

Board: M-30
Poster Future Experimental Facilities, Upgrades, and Instrumentation

### Speakers

Dr Yaping Wang (University of Illinois at Chicago) Dr Zhenyu Ye (University of Illinois at Chicago)

### Description

A Heavy Flavor Tracker (HFT) has been installed in the STAR experiment at the Relativistic Heavy Ion Collider since January 2014. It greatly enhances the capability for heavy flavor studies by measurements of displaced vertices and direct topological reconstruction of open charm hadrons. The HFT consists of two inner layers of silicon pixel detectors, an intermediate layer of silicon pad detector and an outer layer of silicon strip detector. The Intermediate Silicon Tracker (IST) is the third layer made of silicon pad sensors, which have a position resolution of about 180 (1800) microns in the r-$\phi$ (z) direction. In this poster, we will present the design of the IST detector system, and its performance in the cosmic ray tests and ongoing physics data taking with Au-Au collisions.
On behalf of collaboration: STAR

### Primary authors

Dr Gerrit J. van Nieuwenhuizen (Massachusetts Institute of Technology) Dr Yaping Wang (University of Illinois at Chicago) Dr Zhenyu Ye (University of Illinois at Chicago)

 Poster