Time evolution of the luminosity of colliding heavy-ion beams in BNL Relativistic Heavy Ion Collider and CERN Large Hadron Collider

Journal Article · Tue Sep 07 04:00:00 EDT 2010 · Physical Review Special Topics: Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevSTAB.13.091001· OSTI ID:991724

Bruce, R; Blaskiewicz, M; Jowett, J M; Fischer, W

We have studied the time evolution of the heavy ion luminosity and bunch intensities in the Relativistic Heavy Ion Collider (RHIC), at BNL, and in the Large Hadron Collider (LHC), at CERN. First, we present measurements from a large number of RHIC stores (from Run 7), colliding 100 GeV/nucleon {sup 197}Au{sup 79}+ beams without stochastic cooling. These are compared with two different calculation methods. The first is a simulation based on multi-particle tracking taking into account collisions, intrabeam scattering, radiation damping, and synchrotron and betatron motion. In the second, faster, method, a system of ordinary differential equations with terms describing the corresponding effects on emittances and bunch populations is solved numerically. Results of the tracking method agree very well with the RHIC data. With the faster method, significant discrepancies are found since the losses of particles diffusing out of the RF bucket due to intrabeam scattering are not modeled accurately enough. Finally, we use both methods to make predictions of the time evolution of the future {sup 208}Pb+{sup 82+} beams in the LHC at injection and collision energy. For this machine, the two methods agree well.

• Research Organization: Brookhaven National Laboratory (BNL) Relativistic Heavy Ion Collider
• Sponsoring Organization: DOE - Office Of Science
• DOE Contract Number: AC02-98CH10886
• OSTI ID: 991724
• Report Number(s): BNL--94129-2010-JA; KB0202011
• Journal Information: Physical Review Special Topics: Accelerators and Beams, Journal Name: Physical Review Special Topics: Accelerators and Beams Journal Issue: 9 Vol. 13
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BETATRONS
BNL
CALCULATION METHODS
CERN
DAMPING
DIFFERENTIAL EQUATIONS
HADRONS
HEAVY IONS
LUMINOSITY
RADIATIONS
SCATTERING
SIMULATION
STOCHASTIC COOLING
SYNCHROTRONS
relativistic heavy ion collider