Operational Stochastic Cooling in the Relativistic Heavy-Ion Collider

Blaskiewicz, M.; Brennan, J.M.; Severino, F.

doi:10.1103/physrevlett.100.174802

Cited by 25 publications

(28 citation statements)

References 10 publications

(16 reference statements)

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“…Since 2000 RHIC has collided U+U, Au+Au, Cu+Au, Cu+Cu, d+Au, and polarized protons at 15 different energies. Recent upgrades have increased the heavy ion luminosity by an order of magnitude through bunched beam stochastic cooling during stores [9][10][11].…”

Section: Rhic In U+u Operationmentioning

confidence: 99%

Measurement of the total cross section of uranium-uranium collisions atsNN=192.8GeV

et al. 2014

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Heavy ion cross sections totaling several hundred barns have been calculated previously for the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC). These total cross sections are more than an order of magnitude larger than the geometric ion-ion cross sections primarily due to Bound-Free Pair Production (BFPP) and Electro-Magnetic Dissociation (EMD). Apart from a general interest in verifying the calculations experimentally, an accurate prediction of the losses created in the heavy ion collisions is of practical interest for the LHC, where some collision products are lost in cryogenically cooled magnets and have the potential to quench these magnets. In the 2012 RHIC run uranium ions collided with each other at √ sNN = 192.8 GeV with nearly all beam losses due to collisions. This allows for the measurement of the total cross section, which agrees with the calculated cross section within the experimental error.PACS numbers: 25.75. Dw, 29.20.db

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Section: Rhic In U+u Operationmentioning

confidence: 99%

Measurement of the total cross section of uranium-uranium collisions atsNN=192.8GeV

et al. 2014

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“…Through betatron coupling, both transverse emittances were cooled. In 2012, by adding the horizontal plane, full 3-dimensional stochastic cooling became operational for the first time in RHIC [18][19][20].…”

Section: B Stochastic Coolingmentioning

confidence: 99%

“…IBS increases the bunch length and blows up transverse beam sizes, and therefore reduces the beam and luminosity lifetimes [12][13][14][15]. To counteract IBS, stochastic cooling had been developed and implemented in the past few years [16][17][18][19][20]. In 2012, by adding the horizontal plane, 3-dimensional (3-d) stochastic cooling became operational for the first time in RHIC.…”

Section: Introductionmentioning

confidence: 99%

Burn-off dominated uranium and asymmetric copper-gold operation in RHIC

Luo

Fischer

Blaskiewicz

et al. 2014

Phys. Rev. ST Accel. Beams

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In 2012 the Relativistic Heavy Ion Collider collided uranium-uranium ions with a particle energy of 96.4 GeV=nucleon and copper-gold (Cu-Au) ions at 100 GeV=nucleon for the first time. 3-dimensional stochastic cooling became operational for the first time and greatly enhanced the luminosity. Together with a new lattice configuration, we achieved a burn-off dominated uranium beam lifetime at physics stores. In the asymmetric Cu-Au collision, we observed an increased Cu beam loss stemming from different intrabeam-scattering and cooling rates between the Au and Cu ion bunches. By intentionally slowing down the cooling rate for the Au beam at the beginning of store, we reduced the Cu beam loss and maximized the integrated luminosity.

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“…Schematically similar to the stochastic cooling already implemented at RHIC [2], CeC has the advantage that its coherent bandwidth is on the order of the resonance wavelength of the operating free-electron laser, so that the cross correlation that leads to heating and therefore saturation of the stochastic cooling system is not encountered in CeC.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional model of small signal free-electron lasers

Webb

Wang

Litvinenko

2011

Phys. Rev. ST Accel. Beams

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Coherent electron cooling is an ultrahigh-bandwidth form of stochastic cooling which utilizes the charge perturbation from Debye screening as a seed for a free-electron laser. The amplified and frequencymodulated signal that results from the free-electron laser process is then used to give an energy-dependent kick on the hadrons in a bunch. In this paper, we present a theoretical description of a high-gain free-electron laser with applications to a complete theoretical description of coherent electron cooling.

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Operational Stochastic Cooling in the Relativistic Heavy-Ion Collider

Cited by 25 publications

References 10 publications

Measurement of the total cross section of uranium-uranium collisions atsNN=192.8GeV

Measurement of the total cross section of uranium-uranium collisions atsNN=192.8GeV

Burn-off dominated uranium and asymmetric copper-gold operation in RHIC

Three-dimensional model of small signal free-electron lasers

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