DS  --  Discussion Sessions


Paper Title Page
DS01 Orbit Feedbacks for Synchrotron Light Sources
Session 1: Monday Afternoon (16:30--18:00 Hrs) 		225
 
  • M. Dehler
    PSI, Paul Scherrer Institut, Villigen, Switzerland
  • D. Bulfone
    ELETTRA, Sincrotrone Trieste, Trieste, Italy
  
  The session is meant to serve as a survey giving an overview on the current status of closed orbit stabilisation and on future needs. Therefore we would be interested to have from each laboratory/project, where appropriate, transparencies on the following discussion topics. The first general part are noise sources for the beam. The second part concentrates on closed orbit feedbacks including its components.  
DS02 Emittance Measurement Techniques
Session 2: Monday Afternoon (16:30--18:00 Hrs) 		226
 
  • O. Chubar
    ESRF, Grenoble, France
  
  I. Physical questions.

Short review of the existing techniques, methods and approaches (imaging, interference, projection, betatron coupling) with their advantages and limitations. New promising methods of emittance diagnostics (short contributions/messages from participants are expected). How to go from beam profile (size, divergence, etc.) measurements to emittance? Problems of indirect measurements.

II. Practical questions.

Emittance, brightness (brilliance), luminosity are very important "passport" characteristics of an accelerator. In practice, however, lack of time, man-power, sometimes low priority, make it not so easy to construct and maintain a good, reliable emittance diagnostic system. How this situation can be improved? What can be shared (ideas, software, hardware, personnel)? How to shorten a long way from a bright idea to a reliable system? Can final beam users (e.g. SR users) contribute/share their diagnostics systems or data?

 
DS03 Industrial Products for Beam Instrumentation
Session 3: Monday Afternoon (16:30--18:00 Hrs) 		227
 
  • H. Schmickler
    CERN, Geneva, Switzerland
  
  In various branches of high technology industry there has been considerable progress in the past years which could be used for beam instrumentation. The subject will be introduced by two short demonstrations:
  1. a demonstration of modern audio electronics with 24bit-96kHz ADC, digital signal electronics and application programs under windows on a PC, which allow to change the parameters of the signal treatment. Potential applications are data monitoring at constant sampling frequency, orbit feedbacks (including high power audio amplifiers), noise reduction on beam current transformers...
  2. digital treatment of video signals webcams, frame grabbers, CCD-data via USB, all one needs for image acquisitions, in particular interesting for profile measurements.
These introductory demonstrations will not last longer than 30 minutes. The remaining time will be used to pass through the audience collecting information into a two dimensional table, which shall contain as row index the accelerator and as column index the type of measurement. The contents of the table will be the "of the shelf" industrial product, that has been used/will be used to perform the task. This table with some explanation will be put into the conference proceedings, such that the interested parties can take the necessary contacts. 		 
DS04 Calibration and Stability of Diagnostics Equipment
Session 4: Tuesday Morning (11:30--13:00 Hrs) 		228
 
  • V. Schlott
    PSI, Paul Scherrer Institut, Villigen, Switzerland
  
  Calibration and Stability of Diagnostics Equipment Topics are divided in 3 categories:
  1. Beam Position Monitors (BPMs)
  2. Current Monitors
  3. Optical Monitors
  
DS05 Digital Signal Treatment in Beam Instrumentation
Discussion Session 5: Tuesday Morning (11:30--13:00 Hrs) 		230
 
  • T. Schilcher
    PSI, Paul Scherrer Institut, Villigen, Switzerland
  
  Digital Signal Processing has grown dramatically over the last five years. The evolution of digital logic and processors has opened up the use of digital signal processing in domains, which were reserved to analog signal processing.

In this discussion session we would like to review digital signal treatment for beam diagnostics application.

Emphasis shall be put on the following subjects:
Digital Signal Processing for:

  • image processing
  • BPMs
  • current monitors
  • beam loss monitors
  • feedback systems
  • others
  
DS06 Beam Loss Monitors
Discussion Session 6: Tuesday Morning (11:30--13:00 Hrs) 		231
 
  • K. Wittenburg
    DESY, Hamburg, Germany
  
 
  1. A very brief review of different beam loss monitors.
  2. Where can beam loss monitors help us?