Title :
KRAKEN, a numerical model of RHIC impedances
Author :
Peggs, S. ; Mane, V.
Author_Institution :
Brookhaven Nat. Lab., Upton, NY, USA
Abstract :
The simulation code KRAKEN confirms analytical predictions of head-tail stability criteria, in the presence of momentum dependent linear coupling. It also confirms that resistive wall transverse wake fields are not a serious threat to strong head-tail stability in RHIC, at the vulnerable stage of proton injection. Equation 10, derived from the perspective of two macroparticles, potentially offers a very convenient semi-numerical evaluation of the effects of arbitrary transverse wake potentials. It remains to be seen how well the two macroparticle results correlate with simulations using, say, 100 macroparticles. KRAKEN is still under rapid development. Future plans are to include resonant wakefields, multiple bunches, space charge wakefields, betatron detuning, and a connection to the detailed RHIC impedance database
Keywords :
beam handling techniques; colliding beam accelerators; electric impedance; high energy physics instrumentation computing; ion accelerators; numerical analysis; particle beam injection; particle beam stability; proton accelerators; space charge; storage rings; synchrotrons; KRAKEN code; RHIC impedances; Relativistic Heavy Ion Collider; analytical predictions; betatron detuning; head-tail stability; momentum dependent linear coupling; multiple bunches; numerical model; proton injection; resistive wall transverse wake fields; resonant wakefields; seminumerical evaluation; simulation code; space charge wakefields; transverse wake potentials; Analytical models; Databases; Equations; Impedance; Numerical models; Predictive models; Protons; Resonance; Space charge; Stability criteria;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505809
