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in creator/contributor: "Drees, K.A."  
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TECHNICAL DESIGN REPORT OF THE FORWARD SILICON VERTEX (FVTX)

Description: The main goal of the RHIC heavy ion program is the discovery of the novel ultra-hot high-density state of matter predicted by the fundamental theory of strong interactions and created in collisions of heavy nuclei, the Quark-Gluon Plasma (QGP). From measurements of the large elliptic flow of light mesons and baryons and their large suppression at high transverse momentum pT that have been made at RHIC, there is evidence that new degrees of freedom, characteristic of a deconfined QCD medium, dri… more
Date: August 1, 2007
Creator: EXPERIMENT, PHENIX; OBRIEN,E.; PAK, R.; DREES, K.A. & COLLABORATORS), (PHENIX EXPERIMENT
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High intensity protons in RHIC

Description: During the 2012 summer shutdown a pair of electron lenses will be installed in RHIC, allowing the beam-beam parameter to be increased by roughly 50 percent. To realize the corresponding luminosity increase bunch intensities have to be increased by 50 percent, to 2.5 {center_dot} 10{sup 11} protons per bunch. We list the various RHIC subsystems that are most affected by this increase, and propose beam studies to ensure their readiness. The proton luminosity in RHIC is presently limited by the be… more
Date: January 5, 2012
Creator: Montag, C.; Ahrens, L.; Blaskiewicz, M.; Brennan, J. M.; Drees, K. A.; Fischer, W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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COLLIMATION EXPERIENCE AT RHIC.

Description: In the Relativistic Heavy Ion Collider (RHIC) the abort kicker magnets are the limiting aperture. Continuous losses at this location could deteriorate the kicker performance. In addition, losses especially in the triplet area cause backgrounds in the experimental detectors. The RHIC one-stage collimation system was used to reduce these backgrounds as well as losses at the abort kickers. Collimation performance and results from various runs with even and uneven species (Au-Au, pp and d-Au) are p… more
Date: May 19, 2003
Creator: DREES,K. A. FLILLER,R. TRBOJEVIC,D. KAIN,V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RHIC Polarized proton operation

Description: The Relativistic Heavy Ion Collider (RHIC) operation as the polarized proton collider presents unique challenges since both luminosity(L) and spin polarization(P) are important. With longitudinally polarized beams at the experiments, the figure of merit is LP{sup 4}. A lot of upgrades and modifications have been made since last polarized proton operation. A 9 MHz rf system is installed to improve longitudinal match at injection and to increase luminosity. The beam dump was upgraded to increase … more
Date: March 28, 2011
Creator: Huang, H.; Ahrens, L.; Alekseev, I. G.; Aschenauer, E.; Atoian, G.; Bai, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Medium energy heavy ion operations at RHIC

Description: 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 is at 100 GeV/n and the lowest achieved energy setpoint was significantly below RHICs injection energy of approximately 10 GeV/n, we also provided beams for data taking in a medium energy range above injection energy and below top beam energy. This paper reviews RHI… more
Date: March 28, 2011
Creator: Drees, K. A.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blackler, I. M. C.; Blaskiewicz, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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RHIC Performance for FY2011 Au+Au Heavy Ion Run

Description: Following the Fiscal Year (FY) 2010 (Run-10) Relativistic Heavy Ion Collider (RHIC) Au+Au run, RHIC experiment upgrades sought to improve detector capabilities. In turn, accelerator improvements were made to improve the luminosity available to the experiments for this run (Run-11). These improvements included: a redesign of the stochastic cooling systems for improved reliability; a relocation of 'common' RF cavities to alleviate intensity limits due to beam loading; and an improved usage of fee… more
Date: September 4, 2011
Creator: Marr, G.; Ahrens, L.; Bai, M.; Beebe-Wang, J.; Blackler, I.; Blaskiewicz, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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