WEA2WD —  WG-D   (07-Mar-18   11:00—12:30)
Chair: J. Pflueger, DESY, Hamburg, Germany
Paper Title Page
WEA2WD01 QUAPEVA: Variable High Gradient Permanent Magnet Quadrupole 89
 
  • C.A. Kitegi, T. André, M.-E. Couprie, A. Ghaithpresenter, J. Idam, A. Loulergue, F. Marteau, D. Oumbarek, M. Sebdaoui, M. Valléau, J. Vétéran
    SOLEIL, Gif-sur-Yvette, France
  • C. Benabderrahmane, J. Chavanne, G. Le Bec
    ESRF, Grenoble, France
  • O. Cosson, F. Forest, P. Jivkov, J.L. Lancelot
    Sigmaphi, Vannes, France
  • P. N'gotta
    MAX IV Laboratory, Lund University, Lund, Sweden
  • C. Vallerand
    LAL, Orsay, France
 
  We present the magnetic and the mechanical design of tunable high gradient permanent magnet (PM) quadrupoles. The tunable gradient of the so-called QUAPEVAS extends from 100T/m up to 200T/m. Seven of them with various lengths, ranging from 26mm up to 100mm, for different integrated quadrupole strengths were manufactured. The measured magnetic performance of these devices is also reported. These devices were successfully developed to transport laser plasma accelerated electron beam. Such applications have however less stringent multipole harmonic content constraints than diffraction limited Light sources. Trails for lowering the multipole harmonics will be discussed.  
slides icon Slides WEA2WD01 [3.093 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FLS2018-WEA2WD01  
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WEA2WD02
Design Study of the High Gradient Magnets for a Future Diffraction-Limited Light Source at MAX IV  
 
  • A.S. Vorozhtsov, P.F. Tavares
    MAX IV Laboratory, Lund University, Lund, Sweden
 
  The introduction of the multibend achromat lattice has ushered in a new era for storage-ring based light sources allowing order-of-magnitude improvements in source performance. A central ingredient in various engineering implementations of the MBA concept is the use of high gradient magnets with significantly smaller apertures than in previous generations of storage rings. Another increasingly common theme is the large scale use of permanent magnet technology. This paper describes the design study of 11 mm bore diameter high gradient magnets in frame of the upgrade concept for a future diffraction-limited light sources reaching the diffraction limit at X-ray wavelengths, i.e. providing emittances on the order of 10 pm·rad within the constraints of the existing MAX IV 3 GeV ring tunnel (528 m circumference). Preliminary lattice designs with 19 bends per achromat have been used as the starting point for the magnet design study. Two solutions such as conventional electromagnet and a hybrid magnet (combination of permanent magnet and electromagnet) are compared. The possible technical challenges that shall be overcome to realize this project are discussed.  
slides icon Slides WEA2WD02 [3.198 MB]  
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WEA2WD03 Analysis of Electron Trajectories in Harmonic Undulator with SCILAB's Model Based Design Codes 93
 
  • H. Jeevakhan, S. Kumar
    NITTTR, Bhopal, India
  • G. Mishra
    Devi Ahilya University, Indore, India
 
  Scilab's X-cos model-based simulation blocks has been used to simulate the trajectories of an electron traversing through an Harmonic undulator. The trajectory of electron along X and Y directions has been simulated from Numerical and analytical methods. Analysis given in the present paper is compared with the other codes. Parallel simulation of Harmonic undulator magnetic field along with trajectories of electron is given in the present analysis.  
slides icon Slides WEA2WD03 [0.652 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FLS2018-WEA2WD03  
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WEA2WD04 Harmonic Undulator Radiation with Dual Non Periodic Magnetic Components 98
 
  • H. Jeevakhan
    NITTTR, Bhopal, India
  • G. Mishra
    Devi Ahilya University, Indore, India
 
  Undulator radiation at third harmonics generated by harmonic undulator in the presence dual non periodic constant magnetic field. Electron trajectories along the x and y direction has been determined analytical and numerical methods. Generalized Bessel function is used to determine the intensity of radiation and Simpson's numerical method of integration is used to find the effect of constant magnetic fields. Comparison with previous analysis has also been presented.  
slides icon Slides WEA2WD04 [1.050 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-FLS2018-WEA2WD04  
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