Author: Faus-Golfe, A.
Paper Title Page
MOPWA016 Increasing the Dynamic and Momentum Apertures of the ThomX Ring by Means of Octupole Correctors 121
 
  • J.F. Zhang, P. Bambade, A. Faus-Golfe, H. Monard
    LAL, Orsay, France
  • A. Faus-Golfe
    IFIC, Valencia, Spain
  • A. Loulergue
    SOLEIL, Gif-sur-Yvette, France
 
  Funding: Work is supported by ANR-10- EQPX-51 and ANR-11-IDEX-0003-02, and also by grants from Region Ile-de-France.
The electron ring of the compact Compton-backscattering X-ray source ThomX which is being built at LAL featured with a small circumference of 18 meters and a low beam energy 50-70 MeV, and its long term single particle dynamics is dominated by the non linear effects in the transverse and longitudinal planes. In this paper, we study the feasibilities to reduce the sextupole resonances and then increase the dynamic aperture and momentum aperture of the ThomX ring, using octupoles correctors.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPWA016  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
MOPHA008 Investigation of Beam Halo Using In Vacuum Diamond Sensor at ATF2 791
 
  • S. Liu, P. Bambade, F. Bogard, P. Cornebise, V. Kubytskyi, C. Sylvia
    LAL, Orsay, France
  • A. Faus-Golfe, N. Fuster-Martínez
    IFIC, Valencia, Spain
  • T. Tauchi, N. Terunuma
    KEK, Ibaraki, Japan
  • T. Tauchi, N. Terunuma
    Sokendai, Ibaraki, Japan
 
  Funding: Chinese Scholarship Council, CNRS and P2IO LABEX
Beam halo transverse distribution measurements are of great importance for the understanding of background sources of the nano-meter beam size monitor at the interaction point (IPBSM) of ATF2. One of the most critical issues for the beam halo measurement is to reach high dynamic range. Two in vacuum diamond sensor beam halo scanners (DSv) with four strips each have been developed for the investigation of beam halo transverse distributions at ATF2. The first DSv was installed for horizontal beam halo scanning after the interaction point (IP) of ATF2, in Nov. 2014. It aims to measure the beam halo distribution with large dynamic range (~106), and investigate the possibility of probing the Compton recoil electrons produced in the interaction with the IPBSM laser beams. Studies to characterize the DS performance and measurements of horizontal beam halo performed in Nov.-Dec. 2014 are presented.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-MOPHA008  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
TUPTY019 Realistic Beam Halo Model study in the Extraction Line of ATF2 2038
 
  • N. Fuster-Martínez, A. Faus-Golfe
    IFIC, Valencia, Spain
  • P. Bambade, S. Liu, S. Wallon
    LAL, Orsay, France
  • K. Kubo, T. Okugi, T. Tauchi, N. Terunuma
    KEK, Ibaraki, Japan
  • E. Marín, G.R. White
    SLAC, Menlo Park, California, USA
 
  Funding: Work supported by IDC-20101074, FPA2013-47883-C2-1-P and ANR-11-IDEX-0003-02
The understanding and control of the transverse beam halo distributions is an important issue to reduce sources of background noise in Future Linear Colliders (FLC) and specifically at ATF2. A realistic model of the beam halo in the old extraction line of the ATF damping ring was obtained in 2005, based on wire scanner measurements. Recently, new measurements were done in the new extraction line of ATF2, using both wire scanners, in 2013, and Optical Transition Radiation monitors (OTR), in 2014. The beam halo propagation through the ATF2 beamline by means of tracking simulations has been investigated using as input a purely Gaussian and uniform beam halo model.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-TUPTY019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPMN058 Transverse Impedance Measurements and DC Breakdown Tests on the First Stripline Kicker Prototype for the CLIC Damping Rings 3058
 
  • C. Belver-Aguilar, A. Faus-Golfe
    IFIC, Valencia, Spain
  • M.J. Barnes, H.A. Day
    CERN, Geneva, Switzerland
  • A. Faus-Golfe
    LAL, Orsay, France
  • F. Toral
    CIEMAT, Madrid, Spain
 
  A first stripline kicker prototype for beam extraction from the CLIC Damping Rings (DRs) has been designed at IFIC and CIEMAT, with excellent field homogeneity, good power transmission and low beam coupling impedance. The prototype has been built by the company Trinos Va\-cuum Projects, and laboratory tests and measurements have been carried out at CERN to characterize, without beam, the electromagnetic response of the striplines. In this paper, we present the measurements of the transverse beam coupling impedance, using the coaxial wire method, and a comparison with simulations. Furthermore, results of DC breakdown tests, using High Vol\-ta\-ge (HV) power supplies, are also reported.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMN058  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)  
 
WEPMN059 Design Study and Construction of a Transverse Beam Halo Collimation System for ATF2 3062
 
  • N. Fuster-Martínez, A. Faus-Golfe
    IFIC, Valencia, Spain
  • P. Bambade, S. Liu, S. Wallon
    LAL, Orsay, France
  • K. Kubo, T. Okugi, T. Tauchi, N. Terunuma
    KEK, Ibaraki, Japan
  • I. Podadera, F. Toral
    CIEMAT, Madrid, Spain
 
  Funding: Work supported by IDC-20121074, FPA2013-47883-C2-1-P and ANR-11-IDEX-0003-02
The feasibility and efficiency of a transverse beam halo collimation system for reducing the background in the ATF2 beamline has been studied in simulations. In this paper the design and construction of a retractable transverse beam halo collimator device is presented. The wakefield induced-impact of a realistic mechanical prototype has been studied with CST PS, as well as the wakefield beam dynamics impact by using the tracking code PLACET.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2015-WEPMN059  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)