As a result the tracking speed is increased by a factor 3 with respect to the general CERN computing facility. Conversion programs and graphics interfaces now allow tracking to be done with both MAD and Sixtrack in an automated way. The MAD-9 project is being pursued, with the aim of making available to the community the latest developments in accelerator physics. It will be organized as modules around a small database accessible to other applications as well. An experiment was done on the SPS to measure the efficiency of a multi-stage collimation system.
Preliminary results are in reasonable agreement with simulations.
Studies have shown that fast indicators can be used for an approximate evaluation of the dynamic aperture. An interpolating law was found to evaluate the long term dynamic aperture from survival plots. Strategies for magnet sorting during installation were elaborated to partly compensate the effect of random errors. A sizable gain can be achieved in cases were random errors dominate. Collective Effects in LHC A critical review of resistive losses in the LHC beam screen, taking into account anomalous skin effect and surface roughness, has triggered a program of surface resistance measurements at different temperatures, frequencies and magnetic field intensities.