The STAR MAPS-based PiXeL detector

Contin, G.; Greiner, L.; Schambach, J.; Szelezniak, Michal; Anderssen, E.; Bell, Jacque; Cepeda, Mario; Johnson, Thomas A.; Qiu, H.; Ritter, H. G.; Silber, Joseph; Stezelberger, T.; Sun, X.; Tran, C.; Vu, C.; Wieman, H.; Wilson, Kenneth E.; Witharm, R.; Woodmansee, Samuel; Wolf, John W.

doi:10.1016/j.nima.2018.03.003

Cited by 93 publications

(37 citation statements)

References 20 publications

(26 reference statements)

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“…The HFT [17] is a high resolution silicon detector system that aims for topological reconstruction of secondary vertices from heavy flavor hadron decays. It consists of three silicon subsystems: the Silicon Strip Detector (SSD), the Intermediate Silicon Tracker (IST), and two layers of PiXeL (PXL) detectors.…”

Section: Heavy Flavor Trackermentioning

confidence: 99%

“…The SSD detector was still under commissioning when the dataset was recorded, and therefore is not used in the offline data production and this analysis. The PXL detector uses the new Monolithic Active Pixel Sensors (MAPS) technology [17]. This is the first application of this technology in a collider experiment.…”

Section: Heavy Flavor Trackermentioning

confidence: 99%

“…In this article, we report measurements of the centrality dependence of D 0 -meson transverse momentum spectra at mid-rapidity (|y| < 1) in Au+Au collisions at √ s NN = 200 GeV. The measurements are conducted at the Solenoidal Tracker At RHIC (STAR) experiment utilizing the high resolution silicon detector (the Heavy Flavor Tracker, HFT) [17]. The paper is organized in the following order: In Sec.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Centrality and transverse momentum dependence of D0 -meson production at mid-rapidity in Au + Au collisions at sNN=200 GeV

Adam¹,

Adamczyk²,

Adams³

et al. 2019

Phys. Rev. C

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We report a new measurement of D 0-meson production at mid-rapidity (|y| < 1) in Au+Au collisions at √ sNN = 200 GeV utilizing the Heavy Flavor Tracker, a high resolution silicon detector at the STAR experiment. Invariant yields of D 0-mesons with transverse momentum pT 9 GeV/c are reported in various centrality bins (0-10%, 10-20%, 20-40%, 40-60% and 60-80%). Blast-Wave thermal models are used to fit the D 0-meson pT spectra to study D 0 hadron kinetic freeze-out properties. The average radial flow velocity extracted from the fit is considerably smaller than that of light hadrons (π, K and p), but comparable to that of hadrons containing multiple strange

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Section: Heavy Flavor Trackermentioning

confidence: 99%

Section: Heavy Flavor Trackermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Centrality and transverse momentum dependence of D0 -meson production at mid-rapidity in Au + Au collisions at sNN=200 GeV

Adam¹,

Adamczyk²,

Adams³

et al. 2019

Phys. Rev. C

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“…Charged tracks are reconstructed with the Time Projection Chamber (TPC) [11] and the Heavy Flavor Tracker (HFT) [12]. The TPC covers the full azimuth at mid-rapidity (−1 < η < 1).…”

Section: Discussionmentioning

confidence: 99%

Measurement of directed flow of $D^0$ and $\overline{D^{0}}$ mesons in 200 GeV Au+Au collisions at RHIC using the STAR detector

He¹

2019

Proceedings of International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions — PoS(HardProbes20

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Charm quarks, owing to their large mass, are produced predominantly in the initial hard scatterings in heavy-ion collisions, and therefore can be a valuable tool for studying the early time dynamics of these collisions. The rapidity-odd directed flow at mid-rapidity in heavy-ion collisions originates from a tilt in the reaction plane of the thermalized medium caused by the asymmetry between the number of participants from projectile and target nuclei as a function of rapidity. Recently, it has been predicted that the slope of the directed flow at mid-rapidity for D 0 mesons, arising from the transport of charm quarks in the tilted medium, can be several times larger than that of light flavor hadrons. The magnitude of the slope is expected to be sensitive to the magnitude of the tilt and the charm quark drag coefficient in the medium. It has also been predicted that the transient electromagnetic field generated at early time can induce a much larger directed flow for heavy quarks than for light quarks. In these proceedings, we will report on the first measurement of the directed flow for the D 0 andD 0 mesons as a function of rapidity in Au+Au collisions at √ s NN = 200 GeV using high statistics data collected with the Heavy Flavor Tracker in 2014 and 2016 RHIC runs.

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“…CMOS pixel sensors (CPS) are now well established as silicon-based devices for a number of scientific applications [1][2][3][4]. However, when optimal detection requires a depleted sensitive volume exceeding typically 20 µm, most CPS will experience severe limitations because their depletion depth reaches only a few micrometers.…”

Section: Introductionmentioning

confidence: 99%

Study of the depletion depth in a frontside biased CMOS pixel sensors

et al. 2019

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Depletion of the sensitive volume for semiconductor based detectors is a key to achieve high performance. It is for instance required for charged particle detection in highly radiative environment and for X-ray spectroscopy. PIPPER-2 is a CMOS pixel sensor featuring an architecture that allows the application of the reverse bias of the pn junction from the frontside (cathode), on the electronic side, without process modification. Biasing voltages up to 45 V have been applied to sensor prototypes fabricated on two different high resistivity substrates: a thin epitaxial layer (1 k cm) and a 40 µm thick bulk substrate (600 cm). Calculations from a simplified analytical model and 3D-TCAD simulations were conducted to predict the evolution of the depletion depth with the bias voltage. These expectations were compared to measurements of PIPPER-2 illuminated with two X-ray energies. We conclude that the frontside biasing method allows the full-depletion of the thin epitaxial layer. In contrast, depletion of the bulk substrate reaches about half-depth but X-rays are still detected over the full depth .

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The STAR MAPS-based PiXeL detector

Cited by 93 publications

References 20 publications

Centrality and transverse momentum dependence of D0 -meson production at mid-rapidity in Au + Au collisions at sNN=200 GeV

Centrality and transverse momentum dependence of D0 -meson production at mid-rapidity in Au + Au collisions at sNN=200 GeV

Measurement of directed flow of $D^0$ and $\overline{D^{0}}$ mesons in 200 GeV Au+Au collisions at RHIC using the STAR detector

Study of the depletion depth in a frontside biased CMOS pixel sensors

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