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@INPROCEEDINGS{Schambach:291943,
author = {Schambach, Joachim and Anderssen, Eric and Contin, Giacomo
and Greiner, Leo and Silber, Joe and Stezelberger, Thorsten
and Sun, Xiangming and Szelezniak, Michal and Videbæk,
Flemming and Vu, Chinh and Wieman, Howard and Woodmansee,
Sam},
title = {{T}he {STAR} {H}eavy {F}lavor {T}racker ({HFT})},
address = {Hamburg},
publisher = {Deutsches Elektronen-Synchrotron, DESY},
reportid = {PUBDB-2015-05677, DESY-PROC-2014-04},
pages = {659-664},
year = {2014},
abstract = {The heavy quark hadrons are suggested as a clean probe for
studying the early dynamic evolution of the dense and hot
medium created in high-energy nuclear collisions. The Heavy
Flavor Tracker (HFT) of the STAR experiment, designed to
improve the vertex resolution and extend the measurement
capabilities in the heavy flavor domain, was installed for
the 2014 heavy ion run of RHIC. It is composed of three
different silicon detectors arranged in four concentric
cylinders close to the STAR interaction point. The two
innermost layers are based on CMOS monolithic active pixels
(MAPS), featured for the first time in a collider
experiment, and the two outer layers are based on pads and
strips. The two innermost HFT layers are placed at a radius
of 2.8 and 8~cm from the beam line and accommodate 400
ultra-thin ($50 \mu m$) high resolution MAPS sensors
arranged in 10-sensor ladders to cover a total silicon area
of $0.16m^{2}$. Each sensor includes a pixel array of 928
rows and 960 columns with a $20.7\mu m$ pixel pitch,
providing a sensitive area of $\sim 3.8 cm^{2}$. The sensor
features $185.6 \mu s$ readout time and $170 mW/cm^{2}$
power dissipation, allowing it to be air cooled, which
results in a global material budget of only 0.5\% radiation
length per layer in the run 14 detector. A novel mechanical
approach to detector insertion enables effective
installation and integration of the pixel layers within a 12
hour shift during the on-going STAR Run. After a detailed
description of the design specifications and the technology
implementation, the detector status and operations during
the 200 GeV Au+Au RHIC run of 2014 will be presented in this
paper. A preliminary estimation of the detector performance
meeting the design requirements will be reported.},
month = {Aug},
date = {2014-08-25},
organization = {Panic2014, Hamburg (Germany), 25 Aug
2014 - 29 Aug 2014},
keywords = {resolution: vertex (INSPIRE) / STAR (INSPIRE) /
semiconductor detector: pixel (INSPIRE) / semiconductor
detector: microstrip (INSPIRE) / semiconductor detector:
design (INSPIRE) / tracking detector (INSPIRE) / spatial
resolution (INSPIRE) / mechanical engineering (INSPIRE) /
performance (INSPIRE)},
cin = {ATLAS / CMS / UNI/EXP},
cid = {I:(DE-H253)ATLAS-20120731 / I:(DE-H253)CMS-20120731 /
$I:(DE-H253)UNI_EXP-20120731$},
pnm = {611 - Fundamental Particles and Forces (POF3-611)},
pid = {G:(DE-HGF)POF3-611},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)8 / PUB:(DE-HGF)15},
doi = {10.3204/DESY-PROC-2014-04/83},
url = {https://bib-pubdb1.desy.de/record/291943},
}