RHIC beam instrumentation

Bai, Mei; Cameron, P.; Cerniglia, P.; Connolly, R.; Cupolo, J.; Degen, C.; Drees, A.; Fliller, R.; Gassner, D.; Mead, J.; Ptitsyn, V.; Satogata, T.; Shea, T. K.; Sikora, R.; Thompson, P.; Witkover, R.

doi:10.1016/s0168-9002(02)01944-7

Cited by 10 publications

(5 citation statements)

References 15 publications

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“…In heavy-ion collisions, these zero-degree calorimeters (ZDCs) [34,35] measure the total energy of the unbound neutrons emitted from the nuclear fragments after a collision. The charged fragments of the collision are bent away by the RHIC dipole magnets upstream of the ZDCs.…”

Section: E Trigger Detectorsmentioning

confidence: 99%

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
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We report a measurement of high-p T inclusive π 0 , η, and direct photon production in p + p and d + Au collisions at √ s NN = 200 GeV at midrapidity (0 < η < 1). Photons from the decay π 0 → γ γ were detected in the barrel electromagnetic calorimeter of the STAR experiment at the Relativistic Heavy Ion Collider. The η → γ γ decay was also observed and constituted the first η measurement by STAR. The first direct photon cross-section measurement by STAR is also presented; the signal was extracted statistically by subtracting the π 0 , η, and ω(782) decay background from the inclusive photon distribution observed in the calorimeter. The analysis is described in detail, and the results are found to be in good agreement with earlier measurements and with next-to-leading-order perturbative QCD calculations.

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Section: E Trigger Detectorsmentioning

confidence: 99%

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
View full text Add to dashboard Cite

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“…13, = increases linearly with respect to cal , while Ác is immune to BPM calibration error. At RHIC, BPM calibration error is estimated to be at the 1.0% level [21], which corresponds to a less than 2.0% systematic error on beta-beat based on the simulation result in Fig. 13.…”

Section: Appendix: Analysis Of Optics Measurement Systematic Errors Dmentioning

confidence: 92%

Application of independent component analysis to ac dipole based optics measurement and correction at the Relativistic Heavy Ion Collider

Shen

Lee

Bai

et al. 2013

Phys. Rev. ST Accel. Beams

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Correction of beta-beat is of great importance for performance improvement of high energy accelerators, like the Relativistic Hadron Ion Collider (RHIC). At RHIC, using the independent component analysis method, linear optical functions are extracted from the turn by turn beam position data of the ac dipole driven betatron oscillation. Despite the constraint of a limited number of available quadrupole correctors at RHIC, a global beta-beat correction scheme using a beta-beat response matrix method was developed and experimentally demonstrated. In both rings, a factor of 2 or better reduction of beta-beat was achieved within available beam time. At the same time, a new scheme of using horizontal closed orbit bump at sextupoles to correct beta-beat in the arcs was demonstrated in the Yellow ring of RHIC at beam energy of 255 GeV, and a peak beta-beat of approximately 7% was achieved.

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“…[175,176] for the Tevatron at Fermilab, and in Refs. [177,178] for the RHIC at Brookhaven National Laboratory. Reference [179] shows diagnostics examples from high energy colliders in general.…”

Section: Storage Ringmentioning

confidence: 99%

Beam Diagnostic Requirements: an Overview

Kube

2020

Preprint

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Beam diagnostics and instrumentation are an essential part of any kind of accelerator. There is a large variety of parameters to be measured for observation of particle beams with the precision required to tune, operate, and improve the machine. In the first part, the basic mechanisms of information transfer from the beam particles to the detector are described in order to derive suitable performance characteristics for the beam properties. However, depending on the type of accelerator, for the same parameter, the working principle of a monitor may strongly differ, and related to it also the requirements for accuracy. Therefore, in the second part, selected types of accelerators are described in order to illustrate specific diagnostics needs which must be taken into account before designing a related instrument.

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RHIC beam instrumentation

Cited by 10 publications

References 15 publications

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
View full text Add to dashboard Cite

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
View full text Add to dashboard Cite

Application of independent component analysis to ac dipole based optics measurement and correction at the Relativistic Heavy Ion Collider

Beam Diagnostic Requirements: an Overview

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RHIC beam instrumentation

Cited by 10 publications

References 15 publications

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+pAbelev1, Aggarwal2, Ahammed3 et al. 2010Phys. Rev. C393130View full textAdd to dashboardCite

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+pAbelev1, Aggarwal2, Ahammed3 et al. 2010Phys. Rev. C393130View full textAdd to dashboardCite

Application of independent component analysis to ac dipole based optics measurement and correction at the Relativistic Heavy Ion Collider

Beam Diagnostic Requirements: an Overview

Contact Info

Product

Resources

About

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
View full text Add to dashboard Cite

Inclusiveπ0,η, and direct photon production at high transverse momentum inp+p
Abelev¹,
Aggarwal²,
Ahammed³
et al. 2010
Phys. Rev. C
39
3
13
0
View full text Add to dashboard Cite