ISOLDE workshop and INTC Mats Lindroos Mats Lindroos INTC open - - PowerPoint PPT Presentation

Mats Lindroos

ISOLDE workshop and INTC

Mats Lindroos

Mats Lindroos

INTC

• pen 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

• f fast 6He 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
• f 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

ecool extraction extraction Injection ions Injection pbar/muons ecool

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

• ne unit smaller than the

target mass At – Study in-beam antiprotonic x-rays

Mats Lindroos

Luminosity

• Luminosity:

– 105 ions, 109 antiprotons

• dp/p=5 10-4
• Emittance = 0.1 micrometer
• Relative energy difference in c.m. = 5 eV

– 1018 cm-2s-1 (10-4 barn-1s-1) – Cross sections for Alkalis (Na, Fr) partly stripped ≈ 10-15 cm2

π β β ε ε =         πβ ε + + πβ ε + ∆ β ≅ =

v h v h e beamsurfac v v h h m c m c nce circumfere e beamsurfac ions p

S p p c v v C S N N L

. . . .

• 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