Paper  Title  Page 

MOPD10  Linear and NonLinear Optimization of the PS2 Negative Momentum Compaction Lattice  67 


PS2 is a design study of a conventional magnet synchrotron considered to replace the existing PS at CERN. In this paper, studies on different aspect of single particle dynamics in the nominal PS2 Negative Momentum Compaction lattice are described. The global tuning flexibility of the ring and the geometric acceptance is demonstrated by a systematic scan of quadrupole settings. Frequency map analysis and dynamic aperture plots for two different chromaticity correction schemes are presented. The impact of magnet misalignments on the dynamic aperture is studied for one of them. A first study of the beam dynamics with magnetic multipole errors using frequency maps and the corresponding analytical tunespread footprints is reported. It is thus demonstrated that multipole errors determine to a large extend the beam dynamics in PS2. 

WEO2C04  Simulation of Spacecharge Effects in the Proposed CERN PS  524 


A new proton synchrotron, the PS2, was proposed to replace the current proton synchrotron at CERN for the LHC injector upgrade. Nonlinear space charge effects could cause significant beam emittance growth and particle losses and limit the performance of the PS2. In this paper, we report on simulation studies of the potential spacecharge effects at the PS2 using threedimensional selfconsistent macroparticle tracking. We will discuss the impact of spacecharge effects on the beam emittance growth, especially due to synchrobetatron coupling, aperture sizes, initial painted distribution, and RF ramping schemes. The computational model used in the simulation will also be discussed. 

