Keyword: vacuum
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MOA01 Frontier Technologies and Future Directions in High Intensity ISOL RIB Production target, ion, proton, ISOL 1
  • P.G. Bricault, F. Ames, N. Bernier, M. Dombsky, P. Kunz, F.S. Labrecque, J. Lassen, A. Mjøs, M. Nozar, J. Wong
    TRIUMF, Canada's National Laboratory for Particle and Nuclear Physics, Vancouver, Canada
  Funding: TRIUMF is funded by a contribution from the federal government through the National Research Council of Canada
The future frontier of the ISOL technique is to increase the intensity of the RIB beams. In the ISOL technique there are several ways to increase substantially the production of rare isotope beam. The most expedient one is to increase the incident beam on target. Increasing the overall release efficiency and ionization efficiency are the other two easiest ways to increase the overall RIB intensity. Now with the TRIUMF/ISAC facility the ISOL RIB facility can operate routinely up to 50 kW, this is 100 μA on target. But, the driver beam intensity cannot increase without considering the radiation damage issues and the challenge to the ion source itself where ionization efficiency are dramatically affected by target out-gazing. The other technology challenge for the ISOL technique is the target material itself. The main concern is the capability of the target material to sustain high power density deposited by the driver beam. Refractory metals foil target are suitable but nevertheless very limited in the available species we can produce with those targets. Composite targets, either for carbide and oxide target material were developed at ISAC that can sustain very high power density.
slides icon Slides MOA01 [3.651 MB]  
PO09 Progress on the RFQ Beam Cooler Design for SPES Project ion, rfq, emittance, injection 68
  • M.M. Maggiore, F. Chiurlotto, M. Comunian, A. Dainelli, M. De Lazzari, A. Galatà, A. Minarello, A.M. Porcellato, S. Stark
    INFN/LNL, Legnaro (PD), Italy
  The SPES project is the new Radioactive Ion Beam facility under construction at Laboratori Nazionali of Legnaro, Italy. In this framework in order to improve the beam quality in terms of transversa emittance and energy spread, a study of a new RFQ beam cooler device is in progress. The electromagnetic design of the RFQ section and the electrostatic layout of the injection and extraction regions have been done. The study about the beam dynamic is going on by means of dedicated codes which allow to take into account the interaction of the ions with the buffer gas needed to cool the beams. The preliminary design of the device is carrying on at LNL since 2011 and the feasibility study is funded by V committee of INFN in the framework of REGATA experiment. Both beam dynamics study and the electromagnetic design are presented in this work.  
PO10 Performance of ALPI New Medium Beta Resonators cavity, cathode, pick-up, superconductivity 73
  • A.M. Porcellato, F. Chiurlotto, M. De Lazzari, A. Palmieri, V. Palmieri, S. Stark, F. Stivanello
    INFN/LNL, Legnaro (PD), Italy
  All the Nb sputtered medium beta cavities installed up to the last year in ALPI were produced by upgrading of old previously Pb plated substrates. For the first time this year we had the opportunity to test on line four 160 MHz, β=0.11 QWRs which were designed and built in order to be Nb sputtered. These resonators were sputtered in between 2007 and 2008 and they were tested at low fields (up to 3 MV/m) just after their production when they showed Q-zero values exceeding 1xE9. They were then stored for about three years in plastic bags and installed in ALPI only this year. The on line tests that we performed after installation showed Q-zero values reduced of about a factor five with respect to the ones measured in laboratory. It is the first time we could pick out a Q deterioration caused by storage in air. So far we have not recognized any Q–degradation both when the sputtered cavities were maintained in vacuum for many years and also when they were open to air for a few weeks for cryostat maintenance. In such a case, as it happened in the maintenance of cryostat CR19 housing high beta resonators, we could instead find some improvements in the Q-curves.  
TUB02 New Developments at the Tandem Accelerators Laboratory at IFIN-HH ion, ion-source, tandem-accelerator, controls 118
  • D.G. Ghita, I.C. Calinescu, S. Dobrescu, N.M. Marginean, I.O. Mitu, T.B. Sava, B. Savu
    IFIN, Magurele- Bucuresti, Romania
  • Gh. Cata-Danil, M.S. Dogaru, M. Enachescu, M.M. Gugiu, P. Ionescu, D.V. Mosu, A. Pantelica, D. Pantelica, A. Petre, I. Popescu, C.A. Simion, C. Stan-Sion, M. Statescu, N.V. Zamfir
    Horia Hulubei National Institute for Physics and Nuclear Engineering, Bucharest, Romania
  The upgrade of the 9 MV Tandem accelerator at IFIN-HH started in 2007. Remarkable improvements were done in the last 5 years that can be seen in the improved performance and reliability of the machine. Using original preparation techniques, some new beam species were tested for the first time in our laboratory. This opened the door to new experiments. A major improvement for the laboratory is the installation of 1 MV Tandetron accelerator dedicated to ultra-sensitive AMS measurements of C-14, Be-10, Al-26 and I-129, and 3 MV Tandetron accelerator dedicated to ion beam analysis. The main directions of the research activity in the laboratory will be shortly presented.  
slides icon Slides TUB02 [3.686 MB]  
WEC02 Status of the HIE-ISOLDE Project at CERN linac, cryomodule, emittance, cryogenics 175
  • Y. Kadi, A.P. Bernardes, Y. Blumenfeld, E. Bravin, S. Calatroni, R. Catherall, M.A. Fraser, B. Goddard, D. Parchet, E. Siesling, G. Vandoni, W. Venturini Delsolaro, D. Voulot, L.R. Williams
    CERN, Geneva, Switzerland
  The HIE-ISOLDE project represents a major upgrade of the ISOLDE facility with a mandate to significantly improve the quality and increase the intensity and energy of radioactive nuclear beams produced at CERN. The project will expand the experimental nuclear physics programme at ISOLDE by focusing on an upgrade of the existing REX linac with a 40 MV superconducting linac comprising thirty-two niobium-on-copper sputter-coated quarter-wave resonators housed in six cryomodules. The new linac will raise the energy of post-accelerated beams from 3 MeV/u to over 10 MeV/u. The upgrade will be staged to first deliver beam energies of 5.5 MeV/u using two high-β cryomodules placed downstream of REX, before the energy variable section of the existing linac is replaced with two low-β cryomodules and two additional high-β cryomodules are installed to attain over 10 MeV/u with full energy variability from as low as 0.45 MeV/u. An overview of the project including a status summary of the different R&D activities and the schedule will be given here.  
slides icon Slides WEC02 [19.513 MB]  
THB04 Development of the Intensity and Quality of the Heavy Ion Beams at GSI ion, rfq, emittance, injection 211
  • L.A. Dahl, W.A. Barth, M.C. Bellachioma, L. Groening, O.K. Kester, M.M. Kirk, D. Ondreka, N. Pyka, P.J. Spiller, J. Stadlmann, H. Vormann, S.G. Yaramyshev
    GSI, Darmstadt, Germany
  • L.H.J. Bozyk, Y. El-Hayek
    FIAS, Frankfurt am Main, Germany
  • C. Xiao
    IAP, Frankfurt am Main, Germany
  For injection into the future FAIR SIS100 synchrotron the GSI linear accelerator UNILAC and synchrotron SIS18 have to provide 1.5·1011 p/spill for the reference U28+ beam. The MeVVa ion source extracts 37 emA of U4+ beam. For improved transmission the RFQ vanes were revised and exchanged. A new ion source terminal with straightforward beam injection into the RFQ is calculated and partly realized for loss free beam transport to the RFQ. To improve the quality of the space charge dominated beam in the DFFD periodic focussing Alvarez section a transverse 4th order resonance was investigated by simulations and experimentally. The multi turn beam injection into the SIS18 requires emittances below βγεx/βγεy=0.8/2.5 [μm]. This suggests introducing a new concept for emittance transfer by solenoidal stripping. A set-up for experimental proof of principle will be installed at the foil stripper. The SIS18 has been equipped with NEG-coated chambers for all magnets and the injection septum. Newly installed ion catchers improve especially the dynamic vacuum pressure. The effect on progress in beam quality development and intensity will be reported.  
slides icon Slides THB04 [9.809 MB]