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HK: Fachverband Hadronen und Kerne
HK 31: Accelerators and Instrumentation II
HK 31.2: Talk
Tuesday, March 17, 2009, 14:30–14:45, H-ZO 90
On the Way to High Dynamic Range Beam Profile Measurements — Jan Egberts1, Carsten Welsch2, 3, and •Sayyora Artikova1 — 1Max Planck Institut für Kernphysik — 2University of Liverpool — 3Cockcroft Institute of Accelerator Science and Technology
A thorough understanding of halo formation and its possible control is highly desirable for essentially all particle accelerators. Particles outside the beam core are not only lost for further experiments, they are also likely to hit the drift chamber and thereby activate the beam pipe, which makes work on the accelerator costly and time consuming.
A well-established technique for transverse beam profile measurements is synchrotron radiation (SR) for high energy and high luminosity accelerators like the LHC or CTF3. At much lower beam energies, an alternative for transverse beam profile measurements based on the direct measurement of light is optical transition radiation (OTR) or the insertion of a luminescent screen. What applies for essentially all these light generation processes, is that the light intensity is over a wide range proportional to the particle density, which makes the optical analysis of such light an ideal tool for beam profile measurements.
A particular challenge, however, is to distinguish the particles in the tail regions of the beam distribution from the much more intense beam core. In this contribution, we present results from laboratory measurements on two different devices that might form the technical base of a future beam halo monitor: the novel SpectraCam XDR camera system and a flexible masking technique based on a DMD micro mirror array.