Author: Gamelin, A.R.
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MOPOR002 Impedance Simulations and Measurements for ThomX Storage Ring 586
 
  • A.R. Gamelin, C. Bruni, V. Chaumat, D. Le Guidec, P. Lepercq, R. Marie
    LAL, Orsay, France
 
  Funding: Work is supported by ANR-10-EQPX-51, by grants from Région Ile-de-France, IN2P3 and Pheniics Doctoral School
ThomX is a compact Compton Backscattering Source (CBS) which is being built at LAL, Orsay, France. ThomX ring has a short circumference of 18 m and a design energy of 50 MeV. Due to the low energy of the beam and in order to avoid beam degradation it is important to evaluate the ring components impedance. A CST Particle Studio impedance simulation of the different components of the ring (BPM, bellows, optical chamber, etc.) is under way. It will be followed by a bench measurement of the longitudinal and transverse impedance using the coaxial wire method. This paper will detail the preliminary results of the ThomX storage ring impedance simulations and the measurement principle we will use.
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOR002  
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MOPOW051 High Level Control Command for ThomX Transfer Line 830
 
  • C. Bruni, I. Chaikovska, S. Chancé, N. Delerue, A.R. Gamelin, H. Guler, H. Monard, C. Vallerand
    LAL, Orsay, France
  • A. Loulergue
    SOLEIL, Gif-sur-Yvette, France
 
  ThomX Compact X ray source is a 50 MeV storage ring, and a linear accelerator based on a photo-injector. As the electron beam in the ring will not be damped by synchrotron radiation, the transfer line should rely on a precise injection in the ring. In order to fulfill this requirement, especially in terms of optics function and orbit correction, different tools have been prepared and tested on the accelerator toolbox of Matlab Middle Layer. We will present the different tools and the underlying physics for the ThomX transfer line.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW051  
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MOPOW052 Status of the Preparation to the Commissioning of the ThomX Storage Ring 833
 
  • I. Chaikovska, C. Bruni, S. Chancé, A.R. Gamelin, H. Monard
    LAL, Orsay, France
  • A. Loulergue
    SOLEIL, Gif-sur-Yvette, France
 
  Funding: Work is supported by the French Agence Nationale de la Recherche as part of the program EQUIPEX under reference ANR-10-EQPX-51, the Ile de France region, CNRS-IN2P3 and Université Paris Sud XI
ThomX is a compact Compton based X-ray source under construction at LAL in Orsay (France). The ThomX facility is composed by a 50-70 MeV linac, a transfer line and a 18 meters long Storage Ring (SR). The Compton scattering between the 50 MeV electron bunch of 1 nC and the 30 mJ laser pulses stacked in the Fabry-Perot cavity results in the production of photons with energies (up to 90 keV) with a maximum flux of 1013 photons/s. The ThomX construction will start shortly aiming to be completed in the middle of 2017. The preparation to the SR commissioning as far as a control system and beam physics applications are concerned is progressing gradually in order to prepare and test all the tools well ahead the start of the machine. The SR commissioning will face with many challenges providing the low energy, compactness, the nonlinear beam dynamics, the limited beam storage and need for the precision and stabilization in the Interaction Region. Several techniques used at the Synchrotron Light Sources should be modified/adapted to meet all the specificity of the ThomX. This is a report on preparation of the ThomX SR commissioning, its  status, planning, main challenges and expectations.
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPOW052  
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TUPOR002 Residual Ion Dynamics in ThomX Electron Storage Ring 1648
 
  • A.R. Gamelin, C. Bruni
    LAL, Orsay, France
 
  Funding: Work is supported by ANR-10-EQPX-51, by grants from Région Ile-de-France, IN2P3 and Pheniics Doctoral School.
ThomX is a compact Compton Backscattering Source (CBS) which is being built in Orsay, France. Ions produced from residual gas in the storage ring can induce several instabilities. However the electron beam stability is crucial to attain the nominal performances foreseen. In order to prevent instabilities ion cleaning is considered. Complete studies of the beam effect on the ions have been undertaken. It shows that there are preferential ion accumulation points depending on the storage ring lattice. This paper will detail the ion longitudinal and transverse dynamics considering the optics of ThomX storage ring.
 
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOR002  
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