The STAR vertex position detector

W. J. Llope; J. Zhou; T. Nussbaum; G. W. Hoffmann; K. Asselta; J. D. Brandenburg; J. Butterworth; T. Camarda; W. Christie; H. J. Crawford; X. Dong; J. Engelage; G. Eppley; F. Geurts; J. Hammond; E. Judd; D. L. McDonald; C. Perkins; L. Ruan; J. Scheblein; J. J. Schambach; R. Soja; K. Xin; C. Yang

doi:10.1016/j.nima.2014.04.080

The STAR vertex position detector

W. J. Llope, J. Zhou, T. Nussbaum, G. W. Hoffmann, K. Asselta, J. D. Brandenburg, J. Butterworth, T. Camarda, W. Christie, H. J. Crawford, X. Dong, J. Engelage, G. Eppley, F. Geurts, J. Hammond, E. Judd, D. L. McDonald, C. Perkins, L. Ruan, J. SchebleinJ. J. Schambach, R. Soja, K. Xin, C. Yang

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

The 2×3 channel pseudo Vertex Position Detector (pVPD) in the STAR experiment at RHIC has been upgraded to a 2×19 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.

Original language	English
Pages (from-to)	23-28
Number of pages	6
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	759
DOIs	https://doi.org/10.1016/j.nima.2014.04.080
State	Published - Sep 21 2014
Externally published	Yes

Funding

We thank the STAR Collaboration for the use of the experimental data shown in this paper and the operation of this system during RHIC running periods as part of STAR standard shift crew operations. We thank Allan Schroeder and the members of the UT-Austin machine shop for the machining of the structural parts of the detector assemblies. We appreciate the expert assistance of the BNL Collider-Accelerator department technicians Charlie Bloxson, Matt Ceglia, and Robbie Karl. We gratefully acknowledge funding from the US Department of Energy under Grant numbers DE-FG02-10ER41666 and DE-FG02-94ER40845 .

Funders	Funder number
US Department of Energy	DE-FG02-10ER41666, DE-FG02-94ER40845

Keywords

RHIC
STAR experiment
Time resolution
Vertex Position Detector
fast timing

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10.1016/j.nima.2014.04.080

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Llope, W. J., Zhou, J., Nussbaum, T., Hoffmann, G. W., Asselta, K., Brandenburg, J. D., Butterworth, J., Camarda, T., Christie, W., Crawford, H. J., Dong, X., Engelage, J., Eppley, G., Geurts, F., Hammond, J., Judd, E., McDonald, D. L., Perkins, C., Ruan, L., ... Yang, C. (2014). The STAR vertex position detector. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 759, 23-28. https://doi.org/10.1016/j.nima.2014.04.080

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abstract = "The 2×3 channel pseudo Vertex Position Detector (pVPD) in the STAR experiment at RHIC has been upgraded to a 2×19 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.",

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author = "Llope, {W. J.} and J. Zhou and T. Nussbaum and Hoffmann, {G. W.} and K. Asselta and Brandenburg, {J. D.} and J. Butterworth and T. Camarda and W. Christie and Crawford, {H. J.} and X. Dong and J. Engelage and G. Eppley and F. Geurts and J. Hammond and E. Judd and McDonald, {D. L.} and C. Perkins and L. Ruan and J. Scheblein and Schambach, {J. J.} and R. Soja and K. Xin and C. Yang",

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doi = "10.1016/j.nima.2014.04.080",

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Llope, WJ, Zhou, J, Nussbaum, T, Hoffmann, GW, Asselta, K, Brandenburg, JD, Butterworth, J, Camarda, T, Christie, W, Crawford, HJ, Dong, X, Engelage, J, Eppley, G, Geurts, F, Hammond, J, Judd, E, McDonald, DL, Perkins, C, Ruan, L, Scheblein, J, Schambach, JJ, Soja, R, Xin, K & Yang, C 2014, 'The STAR vertex position detector', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 759, pp. 23-28. https://doi.org/10.1016/j.nima.2014.04.080

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AU - Llope, W. J.

AU - Zhou, J.

AU - Nussbaum, T.

AU - Hoffmann, G. W.

AU - Asselta, K.

AU - Brandenburg, J. D.

AU - Butterworth, J.

AU - Camarda, T.

AU - Christie, W.

AU - Crawford, H. J.

AU - Dong, X.

AU - Engelage, J.

AU - Eppley, G.

AU - Geurts, F.

AU - Hammond, J.

AU - Judd, E.

AU - McDonald, D. L.

AU - Perkins, C.

AU - Ruan, L.

AU - Scheblein, J.

AU - Schambach, J. J.

AU - Soja, R.

AU - Xin, K.

AU - Yang, C.

PY - 2014/9/21

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AB - The 2×3 channel pseudo Vertex Position Detector (pVPD) in the STAR experiment at RHIC has been upgraded to a 2×19 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.

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JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

ER -

The STAR vertex position detector

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