Measurement and Control of the Beam Energy for the SPIRAL2 Accelerator

WEPF32, http://accelconf.web.cern.ch/AccelConf/ibic2013/International audienceThe first part of the SPIRAL2 facility, which entered last year in the construction phase at GANIL in France, will be composed of an ion source, a deuteron/proton source, a RFQ and a superconducting linear accelerator delivering high intensities, up to 5 mA and 40MeV for the deuteron beams. As part of theMEBT commissioning, the beam energy will be measured on the BTI (Bench of Intermediate Test) at the exit of the RFQ. At the exit of the LINAC, the system has to measure but also control the beam energy. The control consists in ensuring that the beam energy is under a limit by taking account of the measurement uncertainty. The energy is measured by a method of time of flight, the signal is captured by non-intercepting capacitive pick-ups. This paper presents also the results obtained in terms of uncertainties and dynamics of measures

Progress on the Beam Energy Monitor for the SPIRAL2 Accelerator.

WEPF29, posterInternational audienceThe first part of the SPIRAL2 project entered last year in the end of the construction phase at GANIL in France. The facility will be composed by an ion source, a deuteron/proton source, a RFQ and a superconducting linear accelerator. The driver is planned to accelerate high intensities, up to 5 mA and 40 MeV for the deuteron beams. A monitoring system was built to measure the beam energy on the BTI line (Bench of Intermediate Test) at the exit of the RFQ. As part of theMEBT commissioning, the beamenergy will be measured on the BTI with an Epics monitoring application. At the exit of the LINAC, another system will have to measure and control the beam energy. The control consists in ensuring that the beam energy stays under a limit by taking account of the measurement uncertainty. The energy is measured by a method of time of flight; the signal is captured by non-intercepting capacitive pick-ups. This paper describes the BTI monitor interface and presents the system evolution following the design review

Beam Intensity and Energy Control for the SPIRAL2 Facility

TUPB029 - ISBN 878-3-95450-122-9International audienceThe first part of the SPIRAL2 facility, which entered last year in the construction phase at GANIL in France, consists of an ion source, a deuteron and a proton source, a RFQ and a superconducting linear accelerator delivering high intensities, up to 5 mA and 40 MeV for the deuteron beams. Diagnostic developments have been done to control both beam intensity and energy by non-interceptive methods at the linac exit. The beam current is measured by using couples of ACCT-DCCT installed along the lines and the beam energy by using a time of flight device. This paper gives explanations about the technical solutions, the results and resolutions for measuring and controlling the beam

Intensity Control in GANIL's Experimental Rooms

TUPF31International audienceThe safety re-examination of existing GANIL facilities requires the implementation of a safety system which makes a control of the beam intensity sent to the experimental rooms possible. The aim is to demonstrate that beam intensities stay below the authorized limits defined by the safety GANIL group. The challenge is to be able to measure by a non-interceptive method a wide range of beam intensities from 5nA to 5 A with a maximum uncertainty of 5%, independently of the frequency (from 7 to 14.5MHz) and the beam energy (from 1.2 to 95MeV.A). After a comparative study, two types of high frequency diagnostics were selected, the capacitive pick-up and the fast current transformer. This paper presents the signal simulations from diagnostics with different beam energies, the uncertainty calculations and the results of the first tests with beam

The Minimal Supersymmetric Standard Model: Group Summary Report

CONTENTS: 1. Synopsis, 2. The MSSM Spectrum, 3. The Physical Parameters, 4. Higgs Boson Production and Decays, 5. SUSY Particle Production and Decays, 6. Experimental Bounds on SUSY Particle Masses, 7. References.Comment: 121 pages, latex + epsfig, graphicx, axodraw, Report of the MSSM working group for the Workshop "GDR-Supersym\'etrie",France. Rep. PM/98-4

Application des filtres transversaux a ccd, a une chaine de detection acoustique sous-marine. (Theme n° 13)

Les composants à transfert de charges peuvent être utilisés, en traitement du signal, comme calculateur spécialisé à faible consommation et à encombrement réduit. Dans le domaine de l'Acoustique sous-marine, nous présentons quelques applications d'un filtre transversal à pondérations figées et d'un filtre transversal programmable, dans des systèmes de détection embarqués. La réponse impulsionnelle du filtre de 512 étages à pondération figée, est un signal à fréquence F de phase quadratique et d'amplitude modulée selon une pondération de DOLPH-TCHEBYSCHEFF à 32 coefficients (B.T = 134 ; nombre moyen d'échantillons par période = 4). La qualification du composant dans la gamme de température 0°C ; 80°C a été réalisée. Pour une basse fréquence d'échantillonnage, nous montrons que la tenue en témpérature des caractéristiques du filtre dépend du taux de génération thermique de porteurs, caractérisé par le courant d'obscurité s'exprimant en nA/cm2. Pour des valeurs de ce paramètre inférieures à 20 nA/cm2, la dynamique, en compression d'impulsion pour une fréquence d'échantillonnage de 10 kHz est supérieure à 80 dB dans toute la gamme de température. Le filtre transversal réalise ainsi le traitement cohérent, par compression d'impulsion, d'un signal de 3 kHz de bande et de durée 44 ms, de même que l'analyse spectrale, par CZT, sur 72 points avec une résolution de 25 Hz d'un signal de fréquence centrale 2,8 kHz. Une maquette comprenant un module "compression d'impulsion", deux modules "Analyse spectrale" (pour détection asynchrone), ainsi que les filtres de pré-échantillonnage et les signaux de commande associés, a été réalisée sur l'équivalent de 1 carte au format européen de 233,4 x 220 mm, pour une consommation de 4W : soit un gain en volume par rapport à une solution numérique équivalente de 2 et un gain en consommation de 5. Nous présentons ensuite, un filtre transversal à 128 étages, programmable 0 ou 1. Ses caractéristiques électriques sont discutées dans le sens d'une plus grande dynamique pour une meilleure immunité aux variations des tensions d'alimentations. Enfin dans l'optique d'une intégration croissante et d'une plus faible consommation des matériels réalisés, le principe d'un opérateur de test de décision pour un système de détection, est exposé

Failure Mode and Effects Analysis of the Beam Intensity Control for the SPIRAL2 Accelerator

WEPF28, posterInternational audienceThe first phase of the SPIRAL2 project includes adriver and its associated new experimental areas (S3 andNFS caves). The accelerator, located in Caen (France), isbased on a linear solution composed of a normalconducting RFQ and a superconducting linac. Intenseprimary stable beams (deuterons, protons, light and heavyions) will be accelerated at various energies for nuclearphysics. The beam intensity monitoring is a part of the control ofthe operating range. A high level of requirements isimposed on the intensity control system. In 2013, aFailure Mode and Effects Analysis (FMEA) wasperformed by a specialized company helped by theGANIL’s Electronic Group. This paper presents theanalysis and evolutions of the electronic chain ofmeasurement and control