Y. Peinaud

Publications (4)0 Total impact

• Source

  Available from: Eric Cormier

  Article: Production of gamma rays by pulsed laser beam Compton scattering off GeV-electrons using a non-planar four-mirror optical cavity

  T Akagi, S Araki, J. Bonis, I. Chaikovska, R. Chiche, R. Cizeron, M Cohen, E Cormier, P. Cornebise, N Delerue, [......], Y. Peinaud, L. Pinard, H Shimizu, V. Soskov, T Takahashi, R Tanaka, T. Terunuma, J. Urakawa, A. Variola, F Zomer
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  ABSTRACT: As part of the positron source R&D for future $e^+-e^-$ colliders and Compton based compact light sources, a high finesse non-planar four-mirror Fabry-Perot cavity has recently been installed at the ATF (KEK, Tsukuba, Japan). The first measurements of the gamma ray flux produced with a such cavity using a pulsed laser is presented here. We demonstrate the production of a flux of 2.7 $\pm$ 0.2 gamma rays per bunch crossing ($\sim3\times10^6$ gammas per second) during the commissioning.
  11/2011;
• Source

  Available from: Eric Cormier

  Article: Non-planar four-mirror optical cavity for high intensity gamma ray flux production by pulsed laser beam Compton scattering off GeV-electrons

  J. Bonis, R. Chiche, R. Cizeron, M Cohen, E Cormier, P. Cornebise, N Delerue, R. Flaminio, D. Jehanno, F. Labaye, M. Lacroix, R. Marie, B. Mercier, C. Michel, Y. Peinaud, L. Pinard, C. Prevost, V. Soskov, A. Variola, F Zomer
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  ABSTRACT: As part of the R&D toward the production of high flux of polarised Gamma-rays we have designed and built a non-planar four-mirror optical cavity with a high finesse and operated it at a particle accelerator. We report on the main challenges of such cavity, such as the design of a suitable laser based on fiber technology, the mechanical difficulties of having a high tunability and a high mechanical stability in an accelerator environment and the active stabilization of such cavity by implementing a double feedback loop in a FPGA.
  11/2011;
• Source

  Available from: Eric Cormier

  Article: High flux polarized gamma rays production: first measurements with a four-mirror cavity at the ATF

  Nicolas Delerue, J. Bonis, Iryna Chaikovska, R. Chiche, R. Cizeron, M Cohen, J. Colin, P. Cornebise, D. Jehanno, F. Labaye, [......], S. Funahashi, Y Honda, T Omori, H Shimizu, T. Terunuma, J. Urakawa, T Akagi, S Miyoshi, S Nagata, T Takahashi
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  ABSTRACT: The next generation of e+/e- colliders will require a very intense flux of gamma rays to allow high current polarized positrons to be produced. This can be achieved by converting polarized high energy photons in polarized pairs into a target. In that context, an optical system consisting of a laser and a four-mirror passive Fabry-Perot cavity has recently been installed at the Accelerator Test Facility (ATF) at KEK to produce a high flux of polarized gamma rays by inverse Compton scattering. In this contribution, we describe the experimental system and present preliminary results. An ultra-stable four-mirror non planar geometry has been implemented to ensure the polarization of the gamma rays produced. A fiber amplifier is used to inject about 10W in the high finesse cavity with a gain of 1000. A digital feedback system is used to keep the cavity at the length required for the optimal power enhancement. Preliminary measurements show that a flux of about $4\times10^6 \gamma$/s with an average energy of about 24 MeV was generated. Several upgrades currently in progress are also described.
  10/2011;
• Article: ThomX - Conceptual Design Report

  C. Bruni, R. Chiche, R. Cizeron, Y. Fedala, J. Haissinski, M Jacquet, D. Jehanno, M. Lacroix, L. Meignien, B. Mercier, [......], M. C. Nadeau, P. Walter, N. Artemiev, R. Flaminio, C. Michel, L. Pinard, B. Sassolas, J. P. Brasile, A Bravin, G. Leduc