Transition energy problems in RHIC (Relativistic Heavy Ion Collider)

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:7083566

Lee, S Y; Wei, J

A tracking program to study the nonlinear effect of the longitudinal motion for particles in the circular accelerator has been written. When the R.F. voltage V/sub 0/ = 1.2MV is used, we find that ..gamma../sub T/ jump or a faster acceleration rate is needed in RHIC. The simulation result can be understood analytically via the nonlinear equation of motion. For the ..gamma../sub T/ jump scheme, there is little bunch shape dilution or deformation in the transition energy crossing. At a bunch area of 0.3 ev-sec/amu, ..delta gamma../sub T/ = 0.6 in 30 msec is satisfactory to eliminate the beam loss and preserve the bunch area. By manipulating the momentum aperture, the acceleration rate can be increased substantially at the transition energy region. To eliminate beam loss, /+-/0.8% of momentum aperture is needed. On the other hand, when the R.F. voltage is reduced to 100KV, while maintaining the same acceleration rate, the bunch survival rate across the transition energy is dramatically increased. This resulted from both smaller momentum spread and longer adiabatic time at the transition energy region due to the smaller voltage. 11 refs., 7 figs., 1 tab.

• Research Organization: Brookhaven National Lab., Upton, NY (USA)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 7083566
• Report Number(s): BNL-41655; CONF-880335-9; ON: DE88016732
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430200* -- Particle Accelerators-- Beam Dynamics
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& Ion Optics
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BEAM BUNCHING
BEAM DYNAMICS
BROOKHAVEN RHIC
DIFFERENTIAL EQUATIONS
EQUATIONS
EQUATIONS OF MOTION
HEAVY ION ACCELERATORS
MATHEMATICAL SPACE
NONLINEAR PROBLEMS
PARTIAL DIFFERENTIAL EQUATIONS
PHASE SPACE
RF SYSTEMS
SPACE
STORAGE RINGS