ISOLDE workshop and INTC Mats Lindroos Mats Lindroos
INTC open meeting • Technical report (M. Lindroos) – Progress on front end – Status of consolidation and planned shutdown work • Control system – New staff – TRIUMF-ISOLDE collaboration status • Scientific report (T. Nilsson) – Intense use of HRS due to GPS failure – Solid state physics program hampered by the difficulty of making collections at the HRS – Intense schedule for the autumn to recover some lost time – Projection of some 300 shifts of physics in 2001 – Announced a separator course in December • ISOLDE safety (U. Georg) – Experiemntal hall will become a radioactive laboratory in the shutdown – Consequences for users: access and movement of samples and equipment Mats Lindroos
INTC closed meeting • Technical report – JPD stressed that the PS division NOT has the necessary resources today to take over the operation of ISOLDE-REX • Scientific report – Noted that invested resources in getting the HRS running in 2000 has paid back – Noted that the work on the HRS high resolution mode has been hampered by the extensive use of the HRS in 2001 • Safety improvements – Expressed its full support for this work Mats Lindroos
Program (1) • Recent technical developments – Neutron converter target, R. Catherall (20’) – Status of REX- ISOLDE, F. Ames (20’) – New developments at RILIS, V. Fedoseev (20’) – First results from the ISOLDE spectroscopy station, L. Weissman (20’) – Future of HRS, T. Giles (10’) – Cooled beams at ISOLDE, A. Jokinen (10’) – HG- target test at ISOLDE, J. Lettry (10’) – New WWW database of PSB ISOLDE yields, U. Koester (10’) Mats Lindroos
Program (2) • Ways ahead for Isolde – The SPL project, R. Garoby (40’) – Storage ring for low- energy radioactive ions, M. Lindroos (20’) – Exotic probes for radioactive atoms, T. Nilsson* (20’) – A novel concept for neutrino beams by decay of fast 6 He ions*, P. Zucchelli (20’) Mats Lindroos
Program (3) • Solid State Physics – Past, Present and Future of Research in Solid State – Physics with Radiactive Isotopes, T. Wichert (50’) – Quadrupole contributions to the nuclear spin- lattice relaxation, G. Seewald (20’) – Coordination- number Dependence of magnetic hyperfine fields at 111Cd on Ni surfaces, K. Potzger (20’) – Temperature Dependence of EFG's on Surfaces, A. Weber (20’) • ISOL Spectroscopy I – Supersymmetry in nuclei*, F. Iachello* (50’) – The Search For Astrophysical Sites of the r process, F. Thielemann (50’) – News on N=~ Z nuclei: Recent results from GSI, E. Roeckl (30’) Mats Lindroos
Program (4) ISOL Spectroscopy II • – Beta decay of neutron- rich Pb and Bi, H. De Witte (15’) – Beta decay of neutron- rich copper isotopes, J. Van Roosbroeck (15’) – Beta- delayed multiparticle emission: past and near future, H. Fynbo (15’) – Towards a versatile high granularity particle detector, O. Tengblad (15’) – Recent studies of N ~ Z nuclei at ISOLDE, M. Oinonen (15’) – Latest results for r- process nuclides from high-selectivity laser ion source studies, A. Woehr (15’) – Physics with the WITCH experiment, M. Beck (15’) ISOL Spectroscopy III • – New developments in nuclear shell model* , S . Rombouts (50’) – Neutron- deficient nuclei in the A= 70 mass region with a new Total Absorption Gamma Spectrometer, E. Poirier & E. Nacher (30’) – Recent results from collinear laser spectroscopy, W. Geithner (20’) – Laser spectroscopy with an ion buncher, J . Billowes (20’) Mats Lindroos
Program (5) • ISOL Spectroscopy IV – Carbon clusters for mass references, K. Blaum (15’) – Recent mass measurements with ISOLTRAP, F. Herfurth (15’) – NICOLE status report, N. Severijns (20’) • In- beam spectroscopy – Physics with Neutron- Rich RIBs, D. Radford (50’) – Precision Spectroscopy in Single- Nucleon Knockout • Conclusions, J. Äystö (10 min) Mats Lindroos
My impressions • Young and creative community with many ideas for future physics at the ISOLDE and REX facilities • Good progress on technical developments • Attendance low due to a general saturation of meetings • If we can deliver the shifts the Users can make good use of them Mats Lindroos
A Test Intersecting Storage Ring (TISR) for ISOLDE Manfred Grieser, MPI, Heidelberg Mats Lindroos, CERN, Geneva With the support of: J. Jastrzebski, Warzawa University, Warzawa O.Kester, LMU, Munchen, D. Habs, LMU, Munchen S. Koscielniak, TRIUMF, Vancouver Mats Lindroos
Storage ring Mats Lindroos
Intersecting storage ring for antiprotonic and muonic radioactive ions HV platform ISOLDE back to ISOLDE 60 kV beam main beam line 60 keV PENNING to target Trap and Re- 7-gap resonators detector buncher array Separator MINIBALL IH- EBIS (q/A)/(q/A)= RFQ ' A/q<4.5 structure 1/150 HV platform 5 keV/u 300 keV/u 1.1-1.2 MeV/u 0.8-2.2 MeV/u 20-60 kV Injection ions Injection pbar/muons ecool ecool extraction extraction Mats Lindroos
Physics case • Probing of nuclear surface – “Halo model” vs “Neutron skin model” • Neutron Density Distributions Deduced from Antiprotonic Atoms A. Trzcinska, J. Jastrzebski, P. Lubinski, F. J. Hartmann, R. Schmidt, T. von Egidy, and B. Klos Phys. Rev. Lett 87, 2001 – Study of the annihilation residues with mass number one unit smaller than the target mass A t – Study in-beam antiprotonic x-rays Mats Lindroos
Luminosity N N = p ions L v c . m . S C beamsurfac e circumfere nce ∆ ε ε p ≅ β + + + h v v c πβ πβ c . m . p h v = ε ε β β π S beamsurfac e h v h v • Luminosity: – 10 5 ions, 10 9 antiprotons • dp/p=5 10 -4 • Emittance = 0.1 micrometer • Relative energy difference in c.m. = 5 eV – 10 18 cm -2 s -1 (10 -4 barn -1 s -1 ) – Cross sections for Alkalis (Na, Fr) partly stripped ≈ 10 -15 cm 2 • Problems – Intensity of ion beam at short half lives Mats Lindroos
Conclusions • Design of intersecting storage ring has been started and should continue • Possible to do experiments with AD and ISOLDE- REX (-2) facilities of today • Bunching of the beam could increase luminosity and enable in-beam x-ray spectroscopy • Proposal: – Build a Test Intersecting Storage Ring (TISR) at the present ISOLDE and AD facilities Mats Lindroos
TISR at CERN • Limit energy range, rigidity of 2.6 Tm – In the future a larger storage ring for high energies can be added – Cost would be reduced – Time perspective, < 5 years to physics! • Goal: – Explore merging beam method – Study peripheral neutron distribution in neutron rich radioactive nuclei • Such a facility would be a unique possibility for CERN in the field of nuclear physics (AD+ISOLDE) Mats Lindroos
Important • Physics case needs to be carefully studied – In progress (see PRL 87, 2001) • A collaborative effort necessary to build the facility (AD+ISOLDE communities) • Manpower and material costs for construction, commissioning and operation must be addressed from the beginning Mats Lindroos
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