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LAL-Orsay is developing an important effort on R&D and technology studies on RF power couplers for superconductive cavities. These are complex and high technology devices due to their basic functions: vacuum and temperature separation form the environment to the cavity. One of the most critical components of high power couplers is the ceramic RF window that(More)
According to the current, widely accepted paradigm, the evolutionary transition from hermaphroditism toward separate sexes occurs in two successive steps: an initial, intermediate step in which unisexual individuals, male or female, sterility mutants coexist with hermaphrodites and a final step that definitively establishes dioecy. Two nonexclusive(More)
The CLIC polarized positron source is based on a positron production scheme in which polarized photons are produced by a Compton process. In one option, Compton backscattering takes place in a so-called " Compton ring " , where an electron beam of 1 GeV interacts with circularly-polarized photons in an optical resonator. The resulting circularly-polarized(More)
The ultra high luminosity B-factory (SuperB) project of INFN [1, 2] requires a high performance and reliable injection system, providing electrons at 4 GeV and positrons at 7 GeV, to fulfill the very tight requirements of the collider. Due to the short beam lifetime, continuous injection of electrons and positrons in both High Energy Ring (HER) and Low(More)
The injection complex of the SuperB, B-factory project of the " Nicola Cabibbo Laboratory " [1], consists of a polarized electron gun, a positron production system, electron and positron linac sections, a positron Damping Ring and the transfer lines connecting these systems to the collider main rings. To keep the ultra high luminosity nearly constant,(More)
  • O. Dadoun, I. Chaikovska, +5 authors Claude Bernard IN2P3CNRS
  • 2010
The CLIC study considers the hybrid source using chan-neling as the baseline for unpolarised positron production. The hybrid source uses a few GeV electron beam impinging on a tungsten crystal target. With the crystal oriented on its < 111 > axis it results an intense relatively low energy photon beam. The later is then impinging on an amorphous tungsten(More)
The " Photo­Injector at LAL " (PHIL : http://phil.lal.in2p3.fr/) is a new electron beam accelerator at LAL. This accelerator is dedicated to test and characterise electrons photo­guns and high­frequency structures for futur accelerator projects (like the next generation lepton colliders, CLIC, ILC). This machine has been designed to produce low energy (E<10(More)
A rare homomorphic diallelic self-incompatibility (DSI) system discovered in Phillyrea angustifolia (family Oleaceae, subtribe Oleinae) can promote the transition from hermaphroditism to androdioecy. If widespread and stable in Oleaceae, DSI may explain the exceptionally high rate of androdioecious species reported in this plant family. Here, we set out to(More)
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