| Paper |
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| THPLT003 |
Vibrating Wire Scanner Parameters Optimization
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2457 |
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- S.G. Arutunian, K.G. Bakshetyan, N.M. Dobrovolski, M.R. Mailian, V.A. Oganessian, H.E. Soghoyan, I.E. Vasiniuk
YerPhI, Yerevan
- K. Wittenburg
DESY, Hamburg
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The idea to use the metallic vibrating wire as a scanner of particles beams was experimentally confirmed [1, 2] and showed unprecedented sensibility and a huge dynamic rage of the output signal. In this work the response time of the system is estimated on the base of the dynamic model of heat transfer through the wire. A comparison of different materials of the wire is presented and the most suitable materials for different tasks are suggested. The dielectric materials are considered as possible materials of the wire, use of which allows to eliminate the electromagnetic induction from high current beams during the scanning of beam halo. The results of scanning of the iron ion beam of the mass spectrometer are presented. 1. Arutunian S.G., Avetisyan A.E., Dobrovolski N.M., Mailian M.R., Vasiniuk I.E, Wittenburg K., Reetz R., Problems of Installation of Vibrating Wire Scanners into Accelerator Vacuum Chamber. - Proc. 8-th Europ. Part. Accel. Conf. (3-7 June 2002, Paris, France), pp. 1837-1839. 2. Arutunian S.G., Dobrovolski N.M., Mailian M.R., Vasiniuk I.E., Vibrating wire scanner: first experimental results on the injector beam of Yerevan synchrotron.- Phys. Rev. Special Topics. - Accelerators and Beams, 2003, v. 6, 042801.
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| THPLT026 |
Beam Profile Measurements at PETRA with the Laserwire Compton Scattering Monitor
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2526 |
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- T. Kamps
BESSY GmbH, Berlin
- K. Balewski, H.-C. Lewin, S. Schreiber, K. Wittenburg
DESY, Hamburg
- G.A. Blair, G. Boorman, J. Carter, F. Poirier
Royal Holloway, University of London, Surrey
- S.T. Boogert
UCL, London
- T. Lefevre
CERN, Geneva
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The vertical beam profile at the PETRA positron storage ring has been measured using a laserwire scanner. A laserwire monitor is a device which can measure high brilliant beam profiles by scanning a finely focused laser beam non-invasively across the charged particle beam. Evaluation of the Compton scattered photon flux as a function of the laser beam position yields the transverse beam profile. The aim of the experiment at PETRA is to obtain the profile of the positron beam at several GeV energy and several nC bunch charge. Key elements of laserwire systems are currently being studied and are described in this paper such as laser beam optics, a fast scanning system and a photon calorimeter. Results are presented from positron beam profile scans using orbit bumps and a fast scanning scheme.
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