Author: Garcia-Garrigos, J.J.     [García-Garrigós, J.J.]
Paper Title Page
MOPPR042 Characterization Tests of a Stripline Beam Position Monitor for the CLIC Drive Beam 873
  • A. Benot-Morell, A. Faus-Golfe, J.J. García-Garrigós
    IFIC, Valencia, Spain
  • A. Benot-Morell, L. Søby
    CERN, Geneva, Switzerland
  • J.M. Nappa, J. Tassan-Viol, S. Vilalte
    IN2P3-LAPP, Annecy-le-Vieux, France
  • S.R. Smith
    SLAC, Menlo Park, California, USA
  Funding: FPA2010-21456-C02-01, SEIC-2010-00028
A prototype of a stripline Beam Position Monitor (BPM) with its associated readout electronics has been developed at CERN in collaboration with SLAC, LAPP and IFIC. In this paper, the design and simulations of the BPM with the analog readout chain and the BPM test bench are described, and the results of the first characterization tests are presented. The position resolution and accuracy parameters are expected to be below 2μm and 20μm respectively for a beam with a bunching frequency of 12GHz, an average current of 101A and a machine repetition rate of 50Hz.
MOPPR043 Design, Construction and Calibration of a First Prototype of Beam Position System for Hadron Therapy Facilities 876
  • A. Faus-Golfe, C. Belver-Aguilar, C. Blanch Gutierrez, J.J. García-Garrigós
    IFIC, Valencia, Spain
  • E. Benveniste, M. Haguenauer, P. Poilleux
    LLR, Palaiseau, France
  Funding: AIC10-D-000518 and AIC-D-2011-0673.
Beam Position Monitors (BPM) are essential elements in the instrumentation for the beam control in hadron therapy accelerators. The measurement of the beam position become more important at the secondary transport lines towards the patient room where this parameter must be completely determined. In this paper we describe the design, construction, read-out electronics and first calibration tests of a new type of BPM based on four scintillating fibers coupled to four photodiodes to detect the light produced by the fibers when intercepting the beam tails. The prototype will serve to evaluate the different design options in the mechanical and the read-out electronics implementation as well as to define the best processing method to get the beam position.
MOPPR044 Optics and Emittance Studies using the ATF2 Multi-OTR System 879
  • J. Alabau-Gonzalvo, C. Blanch Gutierrez, A. Faus-Golfe, J.J. García-Garrigós, J. Resta-López
    IFIC, Valencia, Spain
  • J. Cruz, D.J. McCormick, G.R. White, M. Woodley
    SLAC, Menlo Park, California, USA
  Funding: Funding Agency: FPA2010-21456-C02-01. Work supported in part by Department of Energy Contract DE-AC02-76SF00515.
A multi-OTR system (4 beam ellipse diagnostic devices based on optical transition radiation) was installed in the extraction line of ATF2 and has been fully operational since September 2011. The OTRs have been upgraded with a motorized zoom-control lens system to improve beam finding and accommodate different beam sizes. The system is being used routinely for beam size and emittance measurements as well as coupling correction. In this paper we present measurements performed during the winter run of 2011 and the early 2012 runs. We show the reconstruction of twiss parameters and emittance, discuss the reliability of the OTR system and show comparisons with simulations. We also present new work to calculate all 4 coupling terms and form the “4-D” intrinsic emittance of the beam utilizing all the information available from the 2-D beam profile images. We also show details and experimental results for performing a 1-shot automated coupling correction.