Systematic error analysis in the absolute hydrogen gas jet polarimeter at RHIC

Abstract

The Polarized Atomic Hydrogen Gas Jet Target polarimeter (HJET) is operated at the Relativistic Heavy Ion Collider (RHIC) since 2004 to measure the absolute polarization of each colliding proton beam. Polarimeter detectors and data acquisition were upgraded in 2015 to increase the solid angle, energy range, and to improve the energy and time resolution. These upgrades along with an improved beam intensity and polarization allowed us to greatly reduce the statistical and systematic errors for the proton polarization measurements in RHIC Runs 15 ($E_{\text{beam}}=100\text{GeV}$) and 17 ($255\text{GeV}$). For a typical 8 hour RHIC store, the measured proton beam average polarization was about $P_{\text{beam}}\sim 55\pm 2.0_{\text{stat}}\pm 0.3_{\text{syst}}\%$. The elastic $pp$ analyzing power, $A_{\text{N}}(t)\sim 0.04$, was determined with a precision of about $|\delta A_{\text{N}}(t)|\sim 0.0002$ in the momentum transfer squared range $0.001<-t<0.020{\text{GeV}}^2$. In this paper we present a detailed systematic error analysis of the polarization measurements at HJET. Perspectives of using the HJET based absolute polarimeters in the future Electron Ion Collider (EIC) will be also discussed.

arXiv comment24 pages, 39 figures

References in corpus (7)

• Prospects for Spin Physics at RHIC
• The spin dependence of high energy proton scattering
• Measurement of the analyzing power in pp elastic scattering in the peak CNI region at RHIC
• High density cluster jet target for storage ring experiments
• Precision Small Scattering Angle Measurements of Elastic Proton-Proton Single and Double Spin Analyzing Powers at the RHIC Hydrogen Jet Polarimeter
• Corrections to the Elastic Proton-Proton Analyzing Power Parametrization at High Energies
• Probing the Pomeron spin-flip with Coulomb-nuclear interference

Cited by in corpus (9)

• Optically Pumped Polarized ${}^3$He${}^{++}$ Ion Source Development for RHIC/EIC
• Feasibility study for precisely measuring the EIC ${}^3$He beam polarization with the Polarized Atomic Hydrogen Gas Jet Target polarimeter at RHIC
• Breakup corrections to the ${}^3$He beam polarization measurements at the future BNL Electron Ion Collider
• Breakup corrections to spin asymmetries in the ${}^3$He beam polarization measurements with the Polarized Atomic Hydrogen Gas Jet Target
• Polarization Measurements of $p^{\uparrow }$ and ${}^3$He${}^{\uparrow }$ Beams at RHIC and Future EIC Using the Polarized Atomic Hydrogen Gas Jet Target
• On the possibility of measuring the polarization of a ${}^3\mathrm{He}$ beam at EIC by the HJET polarimeter
• Absorptive corrections to the electromagnetic form factor in high-energy elastic proton-proton scattering
• Numerical Calculation of Coulomb Corrections in Forward Elastic $p^{\uparrow }p$ and $p^{\uparrow }A$ Scattering
• Evaluation of the beam-induced depolarization of the HJET target at the EIC