[en] The GTS-LHC ion source, designed and build by CEA Grenoble, was installed and commissioned at CERN in 2005. Since than the source has delivered oxygen and lead ion beams (O4+ and Pb27+ from the source, Pb54+ from the linac) for the commissioning of the Low Energy Ion Ring (LEIR). Results of this operation and attempts to improve the source performance and reliability, and the linac performance will be presented in this paper. (authors)

[en] ECRIS's dedicated to radioactive ion production must be as efficient as those used for production of stable elements, but in addition they are subject to more specific constraints such as radiation hardness, short atom-to-ion transformation time, beam purity and low cost. Up to now, different target/ion-source systems (TISSs) have been designed, using singly-charged ECRISs, multi-charged ion sources or an association of singly-to-multi-charged ECRISs. The main goals, constraints and advantages of different existing ECR setups will be compared before a more detailed description is given of the one designed for the SPIRAL II project and its future improvements. (authors)

[en] At the moment, a 70 MeV cyclotron is under construction by the IBA company. This cyclotron will be able to accelerate H- beam from a multi-cusp source and with a beam intensity in the range of 10 mA at the source extraction. A He1+2+ beam is also required. This beam will be produced by a PANTECHNIK ECR ion source (SUPERNANOCAN) with an extracted current of 1 to 2 mA. In this paper the studies and design of the two sources with a common axial injection in the cyclotron are described. (authors)

[en] The design of each component of the Multipurpose Superconducting ECR Ion Source (MS-ECRIS) has been completed and some items are ready. The magnets and the cryostat are under construction at ACCEL and the commissioning is scheduled for March 2007. The mechanical have been optimized and their construction is under way, the microwave system is under refurbishment and the 65 kV power supply is available and upgraded for afterglow operations. Pumping and extraction system were adapted to the EIS test-bench of GSI Darmstadt. The description of each part will be given in the paper along with a schedule of the forthcoming development and experiments. (authors)

[en] Previous experiments with organo-metallic compounds like ferrocene, nickelocene and magnesocene showed that a pure spectrum must be obtained on the residual gas mass analyser before running successfully on the ion source. In collaboration with the chemistry department of the University of Caen, LCMT-ENSI Caen, the synthesis of these metallocene compounds has been studied to provide enriched isotopic compounds to GANIL's users. The chemical transformation yields were 90%, 80% and 43%, respectively. Vanadocene, chromocene, colbatocene and ruthenocene compounds have first been studied with a gas mass analyser and then successfully tested on the ECR 4M ion source at GANIL. Some 15e mu A of V-51(11+), 20e mu A of Cr-52(11+), 22e mu A of Co-59(11+), and 17e mu A of Ru-102(11+) were achieved. The comparison between the results obtained on the gas mass analyser and the ion beams provided by the source has allowed us to validate this method of determining whether or not an organo-metallic compound could be a candidate for running on our ECR ion source. As the ECR ion sources are tuned and used alternately on the GANIL injectors, the available time for the tests is rare, so this method could be an alternative for the validation of new compounds. (authors)

[en] In the beginning of the 90 s, T. Taylor and his collaborators demonstrated ECR sources operating at low frequency (i.e. 2.45 GHz) are able to produce very intense single charge light ion beams. At CEA/Saclay, the SILHI source developments started in 1995. Since 1997 more than 100 mA proton or deuteron beams are routinely produced in pulsed or continuous mode. To comply with ADS reliability constraint, important improvements have been performed to increase the installation reliability. Moreover, to optimize the beam transport in the low energy beam line, the extraction system was carefully designed and space charge compensation studies were undertaken. An important step has been reached in 2005 with the development of a permanent magnet source able to produce a total beam of 109 mA at 85 kV. A new test bench named BETSI, especially dedicated to permanent magnet source developments, is presently under construction. It will allow analysing positive or negative extracted beams up to 50 keV and 100 mA. In addition, for several years work has been done to optimize the production of negative hydrogen ion beam with such an ECR source. Recent analysis pushed towards the construction of a new set up based on a multi-cusp magnetic configuration. After a brief overview of the CEA/Saclay source developments, this article will point out on the recent results and present status. (authors)

[en] The coupled cluster method is improved to calculate 0⁺⁺ glueball mass m/e² in 2+1-D SU(3) lattice gauge theory. In this method, the authors take the linear combination of connected hollow graphs as trial wavefunction and introduce the average for small wilson loop. The second order and the third order 0⁺⁺ glueball masses (m/e²) as the function of the coupling constant β 6/g² show good scaling behavior and good convergent behavior. The vacuum energy W₀ obtained by this method is lower than that by common method

[en] The authors calculate the contributions of extended technicolor (ETC) interaction to CP violation asymmetry parameter δ in top quark pair Production in topcolor-assisted multi-scale technicolor (TOPCMTC) model. Using the new LEP value of R_b, the authors give the numerical results. The authors' results show that ETC interactions can produce significantly effects on CP violation for a certain range of the parameters in TOPCMTC model. For 500 GeV≤√s≤1500 GeV, the value of parameter δ is in the range of 8.65 x 10^-3≤δ≤1.09 x 10^-2. The authors expect that this effect may be testable in the future NLC experiments

[en] The tensor coupling of the ω meson to nucleon in modified derivative scalar coupling (MDSC) model for finite nuclei was investigated. In addition to the spin-orbit splittings improved by the tensor coupling, the results show that the tensor force (or the effect of the tensor coupling) shows attractive in the interior of nuclei, and then becomes repulsive in the surface region. As a result, the single-particle states are more bound for very deep lying orbits, and less bound for those very near the Fermi energies

[en] The variations of moments of inertia of superdeformed (SD) bands ¹⁹⁴Hg(1) and ¹⁹²Hg(1) with angular momentum (rotational frequency) are investigated using the particle-number conserving (PNC) method for treating the cranked shell model. Calculations show that if both the monopole and Y₂₀ quadrupole pairing forces are taken into account, the observed ω variation of the moments of inertia of ¹⁹⁴Hg(1) and ¹⁹²Hg(1) can be reproduced very well both in the low-ω and high-ω ranges, in particular the J⁽²⁾ downturn of ¹⁹⁴Hg(1) and the flattening in J⁽²⁾ of ¹⁹²Hg(1) at ℎω≥0.40 MeV. On the contrast, the calculated J⁽²⁾'s with the Y_2+-1 or Y_2+-2 quadrupole pairing forces are in disagreement with the experiments. The microscopic mechanism of the ω variation of J⁽²⁾ is clearly exhibited in the PNC calculation (the contributions to J⁽²⁾ from various major shells and individual cranked Nilsson orbitals, the occupancy of each cranked Nilsson orbital etc). The ω variation of moment of inertia is the result of the competition among the shell effect (single particle motion in a deformed potential), pairing correlation, Pauli blocking effect and Coriolis (anti-pairing) interaction