V. Schoefer

Achieve Long G10 Kicker Pulse Tops for Au Run at Low Energies (BES-II)

Nuclear Physics (NP) USDOE Office of Science (SC), Iris Zane, V. Schoefer

us (code pays fourni par la source)

A skew quadrupole for the AGS to minimize the polarization losses of the polarized beams

N. Tsoupas, V. Badea, S. Belavia, H. Huang et autres

The partial helices installed in the Alternating Gradient Synchrotron (AGS) 9 [1] eliminate both, the imperfection and the vertical intrinsic spin resonances thus yielding a 70% polarized proton beam with rigidity 79.4 [Tm] with 2x1011 protons/bunch at the end of the AGS …

us (code pays fourni par la source)

Lowering the RHIC-Injection Lambertson Septum magnet to reduce the strength of the RHIC Injection Kickers

N. Tsoupas, Nuclear Physics (NP) USDOE Office of Science (SC), H. Huang, C. Liu et autres

The present RHIC beam-injection-system and one of its components the Lambertson septum magnet will be used by the EIC project to inject the hadrons from the AGS into the EIC hadron ring for further acceleration. The number of hadron bunches injected to …

us (code pays fourni par la source)

Improving extraction efficiency of the third integer resonant extraction using higher order multipoles

Kevin Brown, Nuclear Physics (NP) (SC-26) USDOE Office of Science (SC), V. Schoefer, M. Tomizawa

The new accelerator complex at J-PARC will operate with both high energy and very high intensity proton beams. With a design slow extraction efficiency of greater than 99% this facility will still be depositing significant beam power onto accelerator components [2]. To …

us, jp (code pays fourni par la source)

Rematching AGS Booster synchrotron injection lattice for smaller transverse beam emittances

Chuyu Liu, Nuclear Physics (NP) (SC-26) USDOE Office of Science (SC), J. Beebe-Wang, K. Brown et autres

The polarized proton beam is injected into the booster via the charge-exchange (H- to H+) scheme. The emittance growth due to scattering at the stripping foil is proportional to the beta functions at the foil. It was demonstrated that the current scheme …

us (code pays fourni par la source)

Beam energy scan with asymmetric collision at RHIC

Chuyu Liu, Nuclear Physics (NP) (SC-26) USDOE Office of Science (SC), J. Alessi, E. Beebe et autres

A beam energy scan of deuteron-gold collision, with center-of-mass energy at 19.6, 39, 62.4 and 200.7 GeV/n, was performed at the Relativistic Heavy Ion Collider in 2016 to study the threshold for quark-gluon plasma (QGP) production. The lattice, RF, stochastic cooling and …

us (code pays fourni par la source)

RHIC operation with asymmetric collisions in 2015

C. Liu, Nuclear Physics (NP) (SC-26) USDOE Office of Science (SC), C. Aschenauer, G. Atoian et autres

To study low-x shadowing/saturation physics as well as other nuclear effects [1], [2], proton-gold (p-Au, for 5 weeks) and proton-Aluminum (p-Al, for 2 weeks) collisions were provided for experiments in 2015 at the Relativistic Heavy Ion Collider (RHIC), with polarized proton beam …

us (code pays fourni par la source)

p-Au ramp test

C. Montag, USDOE Office of Science (SC), M. Blaskiewicz, V. Schoefer et autres

During FY2015 RHIC will be providing proton-gold collisions for the first time. The large difference in Z/A of these species results in challenging conditions at injection. The two injection scenarios under investigation are injection at equal Bρ which results in different revolution …

us (code pays fourni par la source)

Fiscal year 2012

Y. Luo, J. Alessi, M. Bai, J. Beebe-Wang et autres

N/A

us (code pays fourni par la source)

Re-Visit Local Coupling Correction in the Interaction Regions of RHIC

Y. Luo, USDOE Office of Science (SC), W. Fischer, C. Liu et autres

In this article we will re-visit the local coupling correction in the interaction regions (IRs) of the Relativistic Heavy Ion Collider (RHIC). We will review the measurement data of triplet quadrupole rolls, the local coupling correction strengths in the RHIC control system, …

us (code pays fourni par la source)

MEDIUM ENERGY HEAVY ION OPERATIONS AT RHIC∗

K. A. Drees, L. Ahrens, M. Bai, J. Beebe-Wang et autres

As part of the search for a phase transition or critical point on the QCD phase diagram, an energy scan including 5 different energy settings was performed during the 2010 RHIC heavy ion run. While the top beam energy for heavy ions …

RHIC Polarized proton operation

H. Z. Huang, L. Ahrens, I G ALEKSEEV, E. Aschenauer et autres

N/A