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Raich, U.

Paper Title Page
PM13 The PS Booster Fast Wire Scanner 122
 
  • S. Burger, C. Carli, K. Priestnall, U. Raich
    CERN, Geneva, Switzerland
  
  The very tight emittance budget for LHC type beams makes precise emittance measurements in the injector complex a necessity. The PS machine uses 2 fast wire scanners per transverse plane for emittance measurement of the circulating beams. In order to ease comparison the same type of wire scanners have been newly installed in the upstream machine, the PS Booster, where each of the 4 rings is equipped with 2 wire scanners measuring the horizontal and vertical profiles. Those wire scanners use new and more modern control and readout electronics featuring dedicated intelligent motor movement controllers, which relieves the very stringent real time constraints due to the very high speed of 20 m/s. In order to be able to measure primary beams at the very low injection energy of the Booster (50 MeV) secondary emission currents from the wire can be measured as well as secondary particle flows at higher primary particle energies during and after acceleration. The solution adopted for the control of the devices is described as well as preliminary results obtained during measurements made in 2002.  
DW02 Global Accelerator Network, Control Systems And Beam Diagnostics
Session 2: Wednesday (11:15--13:00 Hrs) 		260
 
  • U. Raich, H. Schmickler
    CERN, Geneva, Switzerland
  
  Falling funds force all accelerator centers to look for new sources of financing and for the most efficient way of implementing new projects. This very often leads to collaborations between institutes scattered around the globe, a problem well known to big high energy physics experiments. The collaborations working on big detectors e.g. for LHC started thinking about detector acquisition and control systems which can be remotely used from their respective home institutes with minimal support on the spot. This idea was taken up by A. Wagner from DESY for the TESLA machine, who proposed the “Global Accelerator Network” (GAN) enabling users from around the world to run an accelerator remotely. Questions around this subject that immediately come to mind
  • Is the GAN only relevant to big labs ? Or is it reasonable e.g. for operators or engineers in charge to do certain manipulations from home?
  • Are our instruments ready for the GAN?
  • Does the fact of being “GAN ready” increase the cost of the instruments?
  • What are the advantages and disadvantages?
  • Do we want these features? or do inconveniences prime over advantages?
  • Do any of the labs already have experience with GAN or any system going into this direction?
  • What does GAN mean for the relationship between controls and beam diagnostics (a sometimes difficult chapter)?
  • Can measurement systems be put onto the WEB and if yes, which ones
  • Where are the limitations?
  • Can the scope of GAN be expanded to “remote diagnostics and active maintenance” of equipment, i.e. collaborating partners maintain their product in service after commissioning.
  • What about common machine experiments with people sitting in different control rooms?
  • What communication systems have to be put in place for this?
  • Are there security issues and how do we deal with them?