[en] Measurements at 19 beam kinetic energies between 1795 and 2235 MeV are reported for the pp elastic scattering spin correlation parameter A_00nn=A_NN=C_NN. The c.m. angular range is typically 60--100^o. The measurements were performed at Saturne II with a vertically polarized beam and target (transverse to the beam direction and scattering plane), a magnetic spectrometer and a recoil detector, both instrumented with multiwire proportional chambers, and beam polarimeters. These results are compared to previous data from Saturne II and elsewhere

[en] In the framework of the IFMIF-EVEDA phase (International Fusion Materials Irradiation Facility--Engineering Validation and Engineering Design Activities), the CEA-Saclay is in charged of the design and realization of the 140 mA cw deuteron source. The IFMIF EVEDA demonstrator will be installed in Japan in the next six years and will have to accelerate the deuteron beam up to 9 MeV. CEA will build the source and the low energy beam line (LEBT) and will test the cw high intensity deuteron production at Saclay. The SILHI source is an electron cyclotron resonance (ECR) source, operating at 2.45 GHz. In 2001, it produced more than 130 mA of deuteron beam in pulsed mode to minimize neutron production. Such a result pushes to develop a new ECR source based on the SILHI design and equipped with a specific extraction system. Several options of the accelerator column will be implemented in order to improve the reliability and the efficiency of the source. The IFMIF source and LEBT design will be reported

[en] Beginning with the TRISPAL project, halo formation has been extensively studied at CEA last 10 years. Effect of mismatching, non-linear forces, resonances, longitudinal-transverse coupling, intrabeam scattering, and interaction with the residual gas have been explored. They have been studied theoretically from both analytical models and dedicated simulation codes and, for some of them, experimentally from proton beam profile measurements over a high dynamic range in a 26 periods FODO channel. Our knowledge, strongly improved through collaborations with our worldwide colleagues, has been applied to the design of several linac projects, whose last are SPIRAL2 and RX2. The goal of this presentation is to summarise the contribution of the CEA teams to the understanding of the halo formation

[en] The deuteron vector polarization of extracted SATURNE II beam as a function of different ion source configurations was studied. In all measurements deuterons were considered as weakly bound protons and neutrons and quasielastic pp→pp+n reaction with the n as a spectator was measured. The Left-Right instrumental asymmetry of the beam polarimeter arms was determined using an unpolarized beam from the ion source Amalthee. The obtained correction factor was applied to asymmetries measured with the beam from the polarized ion source Hyperion in the vector-polarization states. The measurements were carried out at the deuteron beam kinetic energy of 0.80 GeV/nucleon, where the pp-elastic scattering analyzing power is near its maximum. The results showed that in the nominal conditions of the ion source the two so-called unpolarized states' were differently polarized, whereas the absolute values of the beam polarizations in the so-called polarized states' were approximately equal and opposite within errors. It was confirmed that the hexapole lens of the ion source produced beam polarization in the absence of any transition. A decrease of the hexapole current provides an extrema for the beam polarizations in the two unpolarized' states at different current values and slightly violates the equilibrium of polarizations for the ion source polarized states. (orig.)

[en] High-current accelerators are studied for several years at CEA-Saclay for applications such as waste transmutation, tritium production or material irradiation. For these projects, the ion source is a key component because its performances determine the accelerator design. A CW Proton and Deuteron ECR Source has been constructed and is now under test. The aim is to reach a 100mA beam current at 95 keV with a rms normalized emittance better than 0.2 7t.mm.mrad and a very high reliability. In this paper, the source, the low energy beam transport and the beam diagnostics are described. First measurements of the source parameters and beam performances are presented. (author)

[en] During the EVEDA (engineering validation and engineering design activities) phase of the International Fusion Materials Irradiation Facility (IFMIF) project, a 125 mA/9 MeV linear prototype accelerator (LIPAc) has to be built, tested and operated in Rokkasho-mura (Japan). Involved in this project for several years, CEA-Saclay designed the injector of this accelerator which is composed of an electron cyclotron resonance ion source, delivering a 140 mA deuteron beam at 100 keV, and a low energy beam transport (LEBT) line to match the beam for the injection into the radio-frequency quadrupole. In this paper, the components of the LIPAc injector are described.

The commissioning of the ion source and LEBT with beam started in November 2014. The different phases of the commissioning are explained and some noticeable experimental results obtained with a beam at 100 keV are presented. (paper)

[en] Full text: Under the framework of the Broader Approach (BA) Agreement, the Linear IFMIF Prototype Accelerator (LIPAc) has been launched with the objective to validate the low energy part (∼ MeV) of the two IFMIF linacs (40 MeV, 125 mA of D⁺ beam in continuous wave). Starting in mid-2007, the project is managed by two Home Teams (JA-HT and EU-HT) and coordinated by the Project Team at the BA site in Rokkasho with the aim to complete the validation activity with the commissioning and operating the whole LIPAc by June 2017. This paper describes the activities underway with a view to the arrival of the first components in Rokkasho at the beginning of 2013, following prior testing in Europe. (author)

[en] SILHI (High Intensity Light Ion Source) is an ECR ion source producing high intensity proton or deuteron beams at 95 keV. It is now installed in the IPHI site building, at the CEA/Saclay center. IPHI is a front end demonstrator of high power accelerator. The source regularly delivers more than 130 mA protons in cw mode and already produced more than 170 mA deuterons in pulsed mode at nominal energy. The last beam characterizations, including emittance measurements, space charge compensation analysis, and diagnostic improvements, will be reported. Taking into account the SILHI experience, new developments are in progress to build and test a 5 mA deuteron source working in cw mode. This new source will also operate at 2.45 GHz and permanent magnets will provide the magnetic configuration. This source, of which the design will be discussed, will have to fit in with the SPIRAL 2 accelerator developed at GANIL to produce radioactive ion beams. The H^- test stand status is briefly presented here and detailed in companion papers

[en] An analysis in terms of Reliability, Availability, Maintainability and Inspectability (RAMI) has been done for each system (Injector, MEBT, SRF Linac, RF system ) of the deuteron accelerators of the International Fusion Materials Irradiation Facility (IFMIF). The goal of these analyses is to estimate the availability of the accelerator facility based on the current design in order to compare it with the high IFMIF availability requirements. A first availability allocation between accelerator systems was performed to quantify the improvement demanded in terms of RAMI to achieve such requirements. These studies highlight the critical parts and parameters that most likely can have an impact on downtime. Individual fault tree analysis was done for each system of the accelerator with the software RiskSpectrum® PSA Professional. With such model, a deep analysis was done and therefore major unavailability contributors for each system were presented. Statistical analyses were developed to evaluate time dependency, parameters and events importance, sensitivities and uncertainties. Results gave indications for possible improvements, whenever feasible, for each accelerator system. These studies have been performed in collaboration between system designers and RAMI experts enabling the creation of RAMI models that reflect the current accelerator design. The parallel activity on the design and construction of the Linear IFMIF Prototype Accelerator (LIPAc) provides detailed design information and allows the finding of the improvements that the final accelerator could have. Because of the R and D character of the LIPAc, design improvements based on the results of the RAMI analysis could be the major differences between LIPAc and the IFMIF accelerator design