A Small but Efficient Collaboration for the Spiral2 Control System Development

http://accelconf.web.cern.ch/AccelConf/ICALEPCS2013/papers/tucobab01.pdfThe Spiral2 radioactive ion beam facility to be commissioned in 2014 at Ganil (Caen) is built within international collaborations. This also concerns the control system development shared by three laboratories: Ganil has to coordinate the control and automated systems work packages, CEA/IRFU is in charge of the "injector" (sources and low energy beam lines) and the LLRF, CNRS/IPHC provides the emittancemeters and a beam diagnostics platform. Besides the technology Epics based, this collaboration, although being handled with a few people, nevertheless requires an appropriate and tight organization to reach the objectives given by the project. This contribution describes how, started in 2006, the collaboration for controls has been managed both from the technological point of view and the organizational one, taking into account not only the previous experience, technical background or skill of each partner, but also their existing working practices and "cultural" approaches. A first feedback comes from successful beam tests carried out at Saclay and Grenoble; a next challenge is the migration to operation, Ganil having to run Spiral2 as the other members are moving to new projects

U.C.A.N.'s ultra wide band system: MAC and routing protocols

The European funded project U.C.A.N. (Ultra wide- band Concepts for Ad-hoc Networks) is in the process of designing and implementing an Ultra Wide Band (UWB) Impulse Radio (IR) single band communication system. This paper presents the MAC and routing protocols which are currently developed in U.C.A.N. project. Application scenarios for UWB systems are presented. The MAC protocol is an adaptation to UWB from the IEEE 802.15.3 draft standard for narrow-band WPANs. It uses the inherent ranging capability of UWB as a basis for advanced relaying and routing. Some MAC implementation issues on the demonstrator are described. Finally routing metrics and algorithm for the future system are detailed

Radioactive beam diagnostics status and development at the SPIRAL facility

International audienceIn 2001 the first radioactive beam will be accelerated in the CIME cyclotron of the SPIRAL project at GANIL. In order to be able to tune such low intensity beams in the cyclotron (down to few particles per second), a silicon and a scintillator detectors are mounted on probes. They measure the beam energy and the beam phase/RF in the cyclotron as a function of the radius. Such fragile diagnostics are meant to be used routinely from the control room by non-specialists in instrumentation and in presence of various beam intensities. Therefore, a program is developed to control and secure the acquisition procedure, the measurements and the isochronism correction. Additional detectors are installed at a fixed position in the ejection line before the experimental areas. Additionally, a diamond detector is foreseen to be installed in the machine to be tested in order to ease the CIME operation

Irradiation control of the “SPIRAL1” target by measuring the ion beam intensity: “CICS” Project

International audienceIn order to obtain a more precise control on the irradiation of the targets of the “SPIRAL1” installation and to optimize the experiments schedule as well as the exploitation costs, a new criterion of safety is respected. This new safety criterion is the maximum dose (maximum number of ions stopped in the Spiral1 Target). To control this, an AQ system has been put in operation and more specifically a new device has been set up in order to measure the ion beam intensity and to calculate the number of particules per second. This value can then be integrated over time. This device mainly consists of two redundant instrumentations, which are acquired via a real time industrial controller. The accuracy of measurement is estimated taking into account the variation of beam, of the environment and of the installation. This system obtained the agreement of the French nuclear safety authorities and is operational since September 2007

Les Antennes Ultra Large Bande

National audienc

Upgrade of the SPIRAL identification station for high-precision measurements of nuclear β decay

The low-energy identification station at SPIRAL (Système de Production d'Ions Radioactifs Accélérés en Ligne) has been upgraded for studying the β decays of short-lived radioactive isotopes and to perform high-precision half-life and branching-ratio measurements for superallowed Fermi and isospin T=1/2 mirror β decays. These new capabilities, combined with an existing Paul trap setup for measurements of β-ν angular-correlation coefficients, provide a powerful facility for investigating fundamental properties of the electroweak interaction through nuclear β decays. A detailed description of the design study, construction, and first results obtained from an in-beam commissioning experiment on the β+ decays 14 O and 17F is presented