Target and Ion Source Development Thierry Stora Beams

Target and Ion Source Development Thierry Stora

Beams at ISOL facilities* CERN-ISOLDE (74 elements) GANIL-SPIRAL I (7 elements) ISAC-TRIUMF (67 elements) GANIL-SPIRAL I (&II) (1 st HIE-ISOLDE proposals to INTC in 2013 Already many more) * 1 development is ~ 2 -5 man. year effort if the technology is within scope 2 T. Stora EN-STI

Cross section ISOL Beam intensity and availability Ionization Efficiency Target thickness I = F s N erelease eion Proton beam Intensity RIB intensity: Release Efficiency Material science (nanostructured targets, molten salts, …) Chemistry (adsorption enthalpy, molecule formation, …) Ion sources (cathode, plasma, …) Targetry (secondary reactions molten metal shower, …) 3 T. Stora EN-STI

Beam developments in the past 8 years 1 st 8 B ISOL beams BF 2+ from nanotubes X 5 30 Na Re ion source X 10 20, 21 Mg sub- m Si. C Nano UCx 1 st Source From PSI 44 Ti. F + 3 70+Ni beams Nano Y 2 O 3 48 Cr x 250 1 st Fe Beams beams@JAEA 9, 17 C as Helicon Ion source 80 -82 Zn, 130 Cd Purification with quartz ( Hads) CO+ 9 Be(n, a)6 He VADIS Au beams X 5 208 Pb(t, 3 p)208 Hg by laser ionis. New Neutron converter Purification of lanthanide beams Gd. B 6 ion source cavity + RILIS 140 Nd, 140 -142 Sm: Molten salt Target 11 C as CO+ Th. O, Negative ion sources T. Stora EN-STI Nano Ca. O Target (Ar) X 3 -10 VADIS Ion source (72 Kr, 229 Rn) Purific. of Fr, Ra with LIST Trap

Recent results Negative beams : Ø Negative ion source prototype (Gd. B 6 tub ion, Menna et al. NIMB, 266(2008) 4391) Offline efficiencies 2015: e (Br-, I- ) = 17% @1700 C with some questions remaining Online TISD with Nb 535 and Th. O 540 targets, starting this week Y. Martinez, J. Ballof, T. Mendonca 5 T. Stora EN-STI

Recent results LIEBE (Liquid Lead Bismuth target loop for EURISOL) Prototype construction starting (detailled drawings) Offline tests foreseen end 2015 Online tests foreseen in 2016 6 T. Stora EN-STI

Recent results Ta. Fx+ ion beams 8 B beams Target unit #499: - Target material: Carbon nanotubes (MWNCT), ρ=0, 43 g/cm 3 - Standard Ta container, cold transfer line, VADIS ion source - SF 6 in container, (0, 37*10 -4 mbar*l/s, p(SF 6)~1 -2 bar) Release of 8 B & ISOLTRAP’s MR-To. F: Target unit #513 : (Same characterisics as #499, - No 8 BFn+ (n=1, 2, 3) or Oxyflourines detected - Positron activity on A=8 corresponds to 3*102 1/u. C higher SF 6 injection: 1 10 -4 mbar*l/s, ) - Proof that activity originates from 8 B still pending 8 BF HPG e x Decay: Release of 8 B & LA 1 (Tengblad et al. ): 8 B Positron - 8 BFn+ (n=1, 2) detected this time ! +2 - Positron activity on A=46 corresponds to Alphas 3104 -105/u. C (~1 n. A stable contaminant also detected) Target Si detector blue: this work black: Winter et. al, 2008, PRC ke. V Ch. Seiffert, J. Ballof, M. Delonca, B. C. Gonsalves, W. Hwang, R. Lica, M. Madurga Flores, T. M. Mendonca, J. P. Ramos, T. Stora, O. Tengblad, D. Torresi, K. Riisager, M. Borge, M. Owen, et al 7 T. Stora EN-STI

Recent results Nanomaterials Nano. UCx+MWCNT (Act. ILab, ENSAR) has been operated at IPNO-ALTO in Jun 2015 Good and stable yields of n-rich Rb and Cs (99, 100 Rb, 148 Cs) A. Gottberg et al. 37 K beta decay for IS 527 New UO 2 powder batch : 1 st unit UC 539 T. Mendonca et al. 8 Delivered stable 1 e 6 pps 37 K (>8 e 6 was expected) J. P. Ramos et al. T. Stora EN-STI

Organization Developments discussed 1 x/year at GUI meetings (New website under construction): http: //isolde. web. cern. ch/group-upgrade-isolde-gui Priorities (old): priority I : approved INTC proposals asking techn. dvlpt + missed scheduled beams Priority II : Lo. IS Priority III : R&D New Priorities: Priority I : aproved INTC Lo. I`s asking for techn dvlpt + missed scheduled beams Priority II : R&D 9 T. Stora EN-STI

Target evolutions In the past ten years, the developments have been such that any of the Target and Ion Source units contructed in 2016 won’t be identical to those that were used in 2006. 10 T. Stora EN-STI

Team & Collaborations • E. Barbero, B. Crepieux, M. Owen, S. Marzari: (STI-RBS) Target Production, infrastructures • • TISD team: Dr. T. Mendonca : Senior fellow, High power targetry (salt target, LIEBE project) : Jul 16 (4 months maternity leave) (Dr. ) M. Delonca : LIEBE project : Feb 17 J. Ballof : molecular beams (8 B, carbonyl of refractory elements) : Dec 17 J. P. Ramos : Target nanomaterials (EPFL) : Oct 15 +6 months Y. Martinez (KULeuven) : 50% 2018 WJ Whang (RISP) : Jul 15 • • • GANIL, IPNO, INFN, (ENSAR 2 ? ), + TRIUMF, JAEA, Mainz ITN (neutronics, UCx) EPFL, Aveiro, (materials) ESS, CEA, SCK●CEN-Myrrha, SINP, PSI (LIEBE project) R. Augusto (Fluka team) 11 T. Stora EN-STI