The STAR Vertex Position Detector

Abstract

The 2x3 channel pseudo Vertex Position Detector (pVPD) in the STAR experiment at RHIC has been upgraded to a 2x19 channel detector in the same acceptance, called the Vertex Position Detector (VPD). This detector is fully integrated into the STAR trigger system and provides the primary input to the minimum-bias trigger in Au+Au collisions. The information from the detector is used both in the STAR Level-0 trigger and offline to measure the location of the primary collision vertex along the beam pipe and the event "start time" needed by other fast-timing detectors in STAR. The offline timing resolution of single detector channels in full-energy Au+Au collisions is ~100 ps, resulting in a start time resolution of a few tens of picoseconds and a resolution on the primary vertex location of ~1 cm.

15 pages, 6 figures

References in corpus (3)

• Microscopic Models for Ultrarelativistic Heavy Ion Collisions
• The STAR Time Projection Chamber: A Unique Tool for Studying High Multiplicity Events at RHIC
• The TOFp/pVPD Time of Flight System for STAR

Cited by in corpus (35)

• Global polarization of $\Lambda$ hyperons in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• Polarization of $\Lambda$ ($\bar{\Lambda }$) hyperons along the beam direction in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• Global polarization of $\Xi$ and $\Omega$ hyperons in Au+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• Low-$p_T$ $e^{+}{e}^{-}$ pair production in Au$+$Au collisions at $\sqrt{s_{NN}}$ = 200 GeV and U$+$U collisions at $\sqrt{s_{NN}}$ = 193 GeV at STAR
• Beam Energy Dependence of Jet-Quenching Effects in Au+Au Collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, and 62.4 GeV
• Longitudinal double-spin asymmetry for inclusive jet and dijet production in $pp$ collisions at $\sqrt{s}=510$ GeV
• Energy dependence of $J/\psi$ production in Au+Au collisions at $\sqrt{s_{NN}}=$ 39, 62.4 and 200 GeV
• Measurement of inclusive $J/\psi$ suppression in Au+Au collisions at $\sqrt{s_{NN}}$ = 200 GeV through the dimuon channel at STAR
• Azimuthal transverse single-spin asymmetries of inclusive jets and charged pions within jets from polarized-proton collisions at $\sqrt{s}=500$ GeV
• Observation of excess J/$\psi$ yield at very low transverse momenta in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=$ 200 GeV and U+U collisions at $\sqrt{s_{\mathrm{NN}}}=$ 193 GeV
• Collision Energy Dependence of $p_{\mathrm{t}}$ Correlations in Au+Au Collisions at RHIC
• Azimuthal anisotropy in Cu+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• Hyperon polarization along the beam direction relative to the second and third harmonic event planes in isobar collisions at $\sqrt{s_{NN}}$ = 200 GeV
• Longitudinal double-spin asymmetry for inclusive jet and dijet production in polarized proton collisions at $\sqrt{s}=200$ GeV
• Charge-dependent directed flow in Cu+Au collisions at $\sqrt{s_{{}_{NN}}}$ = 200 GeV
• Search for the Chiral Magnetic Effect in Au+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}=27$ GeV with the STAR forward Event Plane Detectors
• Azimuthal anisotropy measurements of strange and multistrange hadrons in U+U collisions at $\sqrt{s_{NN}}=193$ GeV at the BNL Relativistic Heavy Ion Collider
• Underlying event measurements in $p$+$p$ collisions at $\sqrt{s}=200$ GeV at RHIC
• Azimuthal transverse single-spin asymmetries of inclusive jets and identified hadrons within jets from polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV
• Measurement of inclusive J/$\psi$ polarization in p+p collisions at $\sqrt{s}$ = 200 GeV by the STAR experiment
• Measurement of D${}^0$-meson + hadron two-dimensional angular correlations in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=$ 200 GeV
• Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector
• Longitudinal Double-Spin Asymmetries for ${\pi }^0$s in the Forward Direction for 510 GeV Polarized $pp$ Collisions
• Transverse single-spin asymmetry for very forward neutral pion production in polarized $p+p$ collisions at $\sqrt{s}=510$ GeV
• Measurement of cold nuclear matter effects for inclusive $J/\psi$ in $p$+Au collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 200 GeV
• Beam-energy dependence of identified two-particle angular correlations in Au+Au collisions at RHIC
• Longitudinal and transverse spin transfer to $\Lambda$ and $\overline{\Lambda }$ hyperons in polarized $p$+$p$ collisions at $\sqrt{s}=200$ GeV
• Measurement of electrons from open heavy-flavor hadron decays in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=200$ GeV with the STAR detector
• Elliptic Flow of Heavy-Flavor Decay Electrons in Au+Au Collisions at $\sqrt{s_{{}_{\mathrm{NN}}}}$ = 27 and 54.4 GeV at RHIC
• Tracking the baryon number with nuclear collisions
• Precision measurement of the longitudinal double-spin asymmetry for dijet production at intermediate pseudorapidity in polarized $pp$ collisions at $\sqrt{s}$ = 200 GeV
• Measurement of inclusive $J/\psi$ production in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=54.4$ GeV at STAR
• Study of Central Exclusive Production of ${\pi }^{+}{\pi }^{-}$, $K^{+}{K}^{-}$ and $p\bar{p}$ Pairs in Proton-Proton Collisions at $\sqrt{s}=510$ GeV with the STAR Detector at RHIC
• Identified charged hadron production in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$ = 54.4 GeV with the STAR detector
• Inclusive Jet Longitudinal Double-spin Asymmetry $A_{LL}$ Measurements in 510 GeV Polarized $pp$ Collisions at STAR