Author: Gonnin, A.
Paper Title Page
MOPAB028 Estimation of Longitudinal Dimensions of Sub-Picosecond Electron Bunches with the 3-Phase Method 139
 
  • H. Purwar, C. Bruni, A. Gonnin
    LAL, Orsay, France
  • T. Vinatier
    DESY, Hamburg, Germany
 
  An estimation of the longitudinal dimensions for short electron bunches in an accelerating field is an important diagnostic and can be extremely helpful in evaluating the performance of an accelerator. We investigate a method for close estimation of bunch length for sub-picosecond electron bunches from the measurement of their energy spreads. Three or more measurements for the bunch energy spread are made by varying the phase of the accelerating structure and later a reconstruction of the bunch longitudinal dimensions, namely bunch length, initial energy spread and chirp at the entrance of the accelerating structure are obtained using the least square method. A comparison of the obtained results with ASTRA simulations is also included to validate the 3-phase method for sub-ps electron bunches. It is a simple method from both understanding (easy reconstruction using transport matrices) and experimental point of views (multiple measurements of energy spread with varying phase of the accelerating structure).  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB028  
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WEPVA043 Study of the Suitability of 3D Printing for Ultra-High Vacuum Applications 3356
 
  • S. Jenzer, M. Alves, N. Delerue, A. Gonnin, D. Grasset, F. Letellier-Cohen, B. Mercier, E. Mistretta, C. Prevost
    LAL, Orsay, France
  • A. Vion
    BV Proto, Sévenans, France
  • J-P. Wilmes
    AGS Fusion, Izernore, France
 
  Funding: IN2P3/CNRS
In the recent year additive fabrication (3D printing) has revolutionized mechanical engineering by allowing the quick production of mechanical components with complex shapes. So far most of these components are made in plastic and therefore can not be used in accelerator beam pipes. We have investigated samples printed using a metal 3D printer to study their behavior under vacuum. We report on our first tests showing that such samples are vacuum compatible and comparing pumping time.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA043  
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THPVA079 First Optics Design and Beam Performance Simulation of PRAE: Platform for Research and Applications With Electrons at Orsay 4637
 
  • A. Faus-Golfe, S. Barsuk, B. Borgo, D. Douillet, M. El Khaldi, L. Garolfi, A. Gonnin, M. Langlet, P. Lepercq, M. Omeich, V. Puill, C. Vallerand
    LAL, Orsay, France
  • P. Ausset, M. Ben Abdillah, S. Blivet, P. Duchesne, B. Genolini, M. Hoballah, G. Hull, R. Kunne, C. Le Galliard, J. Lesrel, D. Marchand, E. J-M. Voutier
    IPN, Orsay, France
  • A. Hrybok, A. Pastushenko
    National Taras Shevchenko University of Kyiv, Radiophysical Faculty, Kiev, Ukraine
  • A. Vnuchenko
    IFIC, Valencia, Spain
 
  The PRAE project aims at creating a multidisciplinary R&D facility in the Orsay campus gathering various scientific communities involved in radiobiology, subatomic physics, instrumentation and particle accelerators around an electron accelerator delivering a high-performance beam with energy up to 70 MeV and later 140 MeV, in order to perform a series of unique measurements and future challenging R&D. In addition PRAE will provide a major education and training asset for students and engineers yielding a regional instrument of advanced technology at the heart of the scientific, technological and academic complex of the Paris-Saclay University. In this paper we report the first optics design and performance evaluations of such a multidisciplinary machine, including a first description of future experiments and the required beam instrumentation.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA079  
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