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[Andreas Adelmann <andreas.adelmann AT psi.ch>]

Dear colleagues Yuanjie will soon go back home, after her one year visit at PSI. She will summarize her work here on 8. January 2010 WBGB/019 at 15.00 Title: Towards Quantitative Simulations of High Power Proton Cyclotrons Y. Bi   Abstract: We describe a large scale simulation effort and new features in OPAL, that leads to a better quantitative understanding of the existing PSI high power proton cyclotron facility. The 1.3 MW of beam power on target gives stringent requirements of the controlled and uncontrolled beam losses. A new particle matter interaction model taking into account energy loss, small angle multiple Coulomb scattering and nuclear scattering is implemented in OPAL. The new model together with the 3D space charge will increase the predicting capabilities of OPAL significantly. We present initial condition for the Ring simulation, obtained from the new time structure measurement and the profile monitors of the IW2 line. By adjusting the injection position and angle, the flattop voltage and phase, very good agreement between the simulation and measurement at the radial probe RRE4 is obtained. The relation between beam intensity and rms beam size, accelerating voltage is studied and compared with measurement. Ongoing effort demonstrating the validity of our model beyond 3 sigma of the beam core will be discussed. This capability is mandatory in the design and operation of the next generation high power proton drivers. Looking forward to this exiting seminar Andreas

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Dr. sc. math. Andreas (Andy) Adelmann
Staff Scientist
Paul Scherrer Institut WBGB/132 CH-5232 Villigen PSI
Phone Office: xx41 56 310 42 33 Fax: xx41 56 310 31 91
Phone Home: xx41 62 891 91 44
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The more exotic, the more abstract the knowledge, 
the more profound will be its consequences."
Leon Lederman 
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