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

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

Recommandations sur les conditions d'amelioration des animaux de laboratoire (rats et souris).

National audienc

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

Energy and Longitudinal Bunch Measurements at the SPIRAL2 RFQ Exit

Poster, WEPG42International audienceA new step of the SPIRAL2 commissioning started in December 2015 with the accelerationof a first proton beamat the RFQ exit. A test bench, with all the differentdiagnostics which will be used on the SPIRAL2 accelerator, was installed directly afterthe first rebuncher of the MEBT line in order to qualify beams but also to test andmake reliable the diagnosticmonitors. In 2016, different ion beams are qualified bythe diagnostic test bench. This paper describes the results of the energy measurementsdone by a Time of Flightmonitor and the longitudinal measurements using afast faraday cup

Développement d’un logiciel sécuritaire pour la surveillance de l’énergie du faisceau de SPIRAL2

International audienceUn système de mesure et de contrôle de l’énergie du faisceau [1] est situé à la sortie du LINAC de l’accélérateur SPIRAL2. Ce dispositif est nécessaire, pour le réglage et le suivi du faisceau, pour assurer la protection thermique de l’accélérateur et pour contrôler le respect du domaine de fonctionnement de l’accélérateur. Ce système, en cours de conception, doit répondre à des exigences de sûreté de fonctionnement. Suite à une Analyse des Modes de Défaillances et de leurs Effets (AMDE) effectuée par un prestataire extérieur, un certain nombre de recommandations ont été formulées. Certaines d’entre elles concernent le développement du logiciel du microcontrôleur utilisé dans l’électronique de mesure et de contrôle de l’énergie.Après une description du principe de mesure de l’énergie, ce poster explique la méthodologie et le formalisme utilisés pour développer le logiciel, en sûreté et en qualité

Measurement Uncertainty Assessments of the SPIRAL2 ACCT/DCCT

PosterInternational audienceFour instrumentation chains with AC and DC Current Transformers (ACCT-DCCT)will equip the lines of SPIRAL2 facility to measure the beam intensity and line transmissions.These measures are essential to tune and supervise the beam, to assurethe thermal protection of the accelerator and to control that the intensities and transmissionsare below the authorized limits. As such, the uncertainties ofmeasurementchains must be taken into account in the threshold values. The electronic has beendesigned with high requirements of quality and dependability by following differentsteps; from prototyping, the qualification through an Analysis of FailureModes andEffects Analysis (FMEA) until final fabrication. This paper presents the measurementuncertainty assessments of the ACCT/DCCT chains