Presentation on theme: "The High Intensity Stable Ion Beams Working Group HISIB-WG"— Presentation transcript:
1The High Intensity Stable Ion Beams Working Group HISIB-WG Marie-Helene Moscatello (GANIL)Annamaria Porcellato (Legnaro)Uli Ratzinger (GSI)Faical Azaiez (IPN-Orsay)Giacomo DeAngelis (Legnaro)Sigurd Hofmann (GSI)Rolf-Dietmar Herzberg (Liverpool)Rauno Julin (JYFL)ECOS: European COnsortium of Stable (beams)
2--The Science with high intensity stable ion beams 1st meeting (Paris, june 2004) : discussion of the group tasks and of the Work distribution--The Science with high intensity stable ion beams--Beam intensity limitations and technical developmentsfor various types of research lines!N=Z nuclei (in–beam spectroscopy and decay studies) : G. DeAngelisSHE search : S. HofmannSuper heavy nuclei (in-beam spectroscopy and decay studies) : R. D. HerzbergNeutron-deficient nuclei (in-beam spectroscopy and decay studies) : R. JulinExotic shapes and decay modes in nuclei : F. AzaiezNeutron rich nuclei using DIC reactions : F. Azaiez & G. DeAngelis--Status and future developments of existing facilitiesLEGNARO : A. PorcellatoGANIL : M. H. MoscatelloGSI : S. Hofmann&U. RatzingerJYVASKYLA : R. Julin
3Report to NuPECC at the Frascati meeting Beyond Z=112(FE reactions)Neutron rich nucleiat intermediate spins(DI reactions)NeutronDeficient nuclei(FE reactionsR)-In-beam studies-Production: ground state properties and decay studies
4identified two categories of experiments: Categories 1: ‘Studies at the target’Beam intensity limitations due to electronics and data acquisition: up to 100pnACategories 2: ‘Studies at the focal plan (of a spectrometer)’Beam intensity limitations due to target technology: up to 10 to 100pmA
52nd meeting (Legnaro, Oct 2004) : Discussion of the work progress -Report and discussions on the physics and the experimental issues-Discussion on the specifications of a dedicated facility-Report and discussions on the status and future developments of existing facilities
6The performance and requirements for the proposed high intensity stable beam facility:The stable beam facility will be designed to meet the science needs andhave capabilities beyond those presently available in Europe.-It should be able to accelerate all stable elements with a maximum energy rangingfrom 50MeV protons to 10MeV uranium and with beamintensities of more than 100pmA for the heaviest beams.-The accelerator should provide CW operation, excellent energy resolution,low transverse emittance,and flexible beam timing.A super-conducting linear accelerator in conjunction with a high performance ECRsource is a good solution that meets all requirements for the needed high intensitystable beam facility.
7Existing facilities and their future upgrade (in Europe)
8JYFL-Jyväskylä Beams - E > 5 MeV /nucleon Heavy and light ions available>1pμA p, He, B, C, N, O, Ar>100 pnA F, Ne, Mg, Al, Si, S, Cl, Ca, Fe, Cr, Ni,Cu, Zn, Kr>10 pnA Ti, Mn, Ge, Sr, Zr, Ru, XeECR developments for intensity upgradeA second cyclotron will be built and installed
9Near future switching from a Tandem to a q+ injector (PIAVE) LEGNARONear future switching from a Tandem to a q+ injector (PIAVE)MORE CURRENTHEAVIER MASSES
10GANIL : Available stable beams CSS1 beams: from 12C (4 to 13.5 A.MeV) to 238U (4 to 8 A.MeV)intensities: several pA for light ions and < 1 pA for A > 40possibility of simultaneous beams from SME and HE(using a stripper)CIME beams:from He to Xe (2 to 25 A.MeV depending on q/A)Intensities: up to 80pnA (safety limitation!)**with a direct beam line (DBL) from CIME to the G1 and G2
11GANIL LINAG: the driver of Spiral2 Spiral2: q/A=1/3 ions 1mA (Ar) from 0.75 to 14.5 A.MeVable to accelerate 5mA D+ beam up to 20 A.MeVlower intensities avalaible (Cr, Ni,…)2nd step: q/A=1/6 ions 1mA (Xe) from 0.75 to 6.5 MeV/A
12Particle Current in the GSI-Unilac (routine operation) IsotopeIon Source [pµA]Experiment [pµA]40Ca7+3.60.548Ca7+2.054Cr7+1.70.958Fe8+1.170Zn10+1.60.6IonSourceHLIAlvarezTransport line
13The UNILAC-upgrade at GSI New RFQ-structure:gain of the duty factorhigher injection energyincreased acceptanceAdditional 28 GHz-ion-source:intensity gain of factor twohigher charge states for increased duty factor6intensity-gain factor x10
14Guide lines for the document: -Certainly shorter! 3rd meeting (Jyvaskyla, march 2004) :-discussion of the first draft document-discussion of the conclusions and recommendationsToday :- report and discussions on the first draft (mainly the conclusions)of the working group!Guide lines for the document:-Certainly shorter!-Nuclear astrophysics?-The case of Dubna?-The conclusions!
15For the 1st category:The in-beam studies are envisaged to take advantage of the existingstable beam facilities at Jyväskylä and Legnaro.JYFL is currently capable of providing up to 100pnA of severalof the stable beam species and is actively pushing the necessaryion source R&D to extend the list of available beams.LNL is soon expected to reach this level of beam intensities also forvery heavy nuclear beams (up tp U) once PIAVE will routinely replacethe tandem as the injector for the ALPI linear acceleratorThe recommendation of the committee is to ensure a strong supportfrom both the nuclear physics community and the funding agenciesfor these two facilities not only for their accelerator system developmentbut also for the instrumentation and experimental infrastructure that areneeded to host dedicated research programs.
16An important recommendation: is the development of appropriate instrumentation that needs to keep step with the increasing beam currents.The in-beam spectroscopy (at the target) presents its own set of challenges:Cope with one to two order of magnitude counting rates and data acquisition(higher detector segmentation, digital electronics, time stamping andTriggerless data acquisition)
17For the 2nd categoryThe UNILAC upgrade will provide one order of magnitude greaterbeam intensities than today. This is a major improvement whichwill greatly enhance the program to search and study super heavyelements.The realisation of this up-grade is considered highly important andthe committee lends it its full support.
18LINAG, the SPIRAL2 driver is another attractive possibility as it fully matches the specification of the needed high intensitystable ion beam facility,a significant amount of beam time is foreseen to be used for theproduction of high intensity light and medium mass stable ion beamsThis project is recommended as a first step to the desired facility.It is an important proof of feasibility and test bunch for all technicalissues related to very high intensity heavy ion beams.
19It is clear that the use of the upgraded UNILAC and the very intense light and medium beams from LINAG is an attractive short-medium range perspectivefor the community from the point of view of the physics opportunitiesand also from the point of view of the possibilities of testing andimproving instruments and methods.The long term goal for a new dedicated high intensity stable ions facilityin Europe is considered to be one of the important issues to be discussedand considered in the next Long Range Plan of the nuclear physicscommunity.
20In order to be ready for this new project it is also highly important that research and development on the various related keys issues suchas target, spectrometers and ion sources, are initiated and organisedat the European in synergy with future RNB projects.