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L.M. Fraile, CERN PH/IS

L.M. Fraile, CERN PH/IS. Impact of technical issues Running statistics 2006 Report from SGUI Planning for 2007. ISOLDE scientific coordinator’s report INTC meeting, 15 February 2007. Failures 2006 (affecting Physics): Startup. Switchyard was blocked deflector at GHM bent when repaired

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L.M. Fraile, CERN PH/IS

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  1. L.M. Fraile, CERN PH/IS Impact of technical issues Running statistics 2006 Report from SGUI Planning for 2007 ISOLDE scientific coordinator’s report INTC meeting, 15 February 2007

  2. Failures 2006 (affecting Physics): Startup • Switchyard was blocked • deflector at GHM bent when repaired • Line polarity left inverted from 2005 • Tape station not working • Compressed air • The white powder phantom • Problematic target changes (i.e. UCx-W 322, 10 May) • Broken CeO HP 319 target + other (HV) CONSECUENCES IS427 cancelled 11 shift lost rescheduled IS401/442 modified physics aim + lost 2.5 shifts IS358 no physics outcome + lost 4.5 shifts [also RILIS] IS383/428 cancelled 17 rescheduled IS413 little physics outcome 5[also power cuts] IS442 modified collections 3

  3. Failures 2006: CERN Power cuts • 15 May ~ 6:40 • 16 May ~ 14:00 Ventilation PLC problem already appeared (security chain) GPS survived / HRS (UC W 272) affected (IS413/IS442) • 17 Jun ~ 2:40 • 22 Jun ~ 1:40 23 Jun, ventilation problem (security chain) Delays, shortened runs • 29 Jul ~ 7:45 Again VENTILATION controllers (PLCs) It had happened before (see above), took until 4 Aug to repair IS397 + REX-MD cancelled IS413 cut short IS434 (15 shifts) cancelled + IS368 not successful

  4. Main failures 2006: Beam issues et al. • Beam issues • Beam sent to ISOLDE without request, 19 Jun 2006 • Seen by contaminants on stable beam tuning • Focused beam on Ti W 323 target [IS437] • NORM beam (not staggered) onto Pb HP 256 [IS360/IS448 saved!] • Steering due to MBL201 losses / beam on converter • UC W n q 338, beam on target [IS411] • Protons hitting the target and not converter, UC W n q 330 [IS411] • BTY.QDE209 leak • 10 days to repair • IS397 cancelled + REX-MD (simultaneous EBIS cathode problem) • Delays IS393/IS413 and following week • Robot (target handling) • Delays, UC W n 330 • IS413 cut short, IS393 affected (ended by power cut) • Other: HV, target heating…

  5. Request for Schedule 2006 • Requested = 481 shifts • Schedule allows up to 350 • Maximum 10 UCx targets (+ developments) • Requests ~ 265 shifts • RILIS operation • Requests for 2006 amount to 230 experiment shifts • More than 2000 hours on line (exp. + dev. + prep.) • REX-ISOLDE • Beam requests = 174 shifts • Operations limited • Target development

  6. ISOLDE beam time summary 2006 • ISOLDE delivered 350.5 RIB shifts • 280 (80%) experiments INTC • 70.5 (20%) other • Standard target check + TISD + REX-MD • Coordinators reserve: recovery, LoIs • 34 research projects (“experiments”) • Integrated # protons = 7.55E+19 • Indicator… (cf. Ti target) • Far from 2E+20 radioprotection average limit → flexibility required • Recovered from the middle of the year • Running for 214 days (includes extension) • 183 in 2005

  7. ISOLDE beam time summary 2006

  8. ISOLDE shift distribution 2006

  9. Shift distribution 1998-2006 Number of shifts

  10. Key resources: targets • Actinide targets • 196 shifts (out of 350.5) [56%] • 11 new units (includes prototypes) • Fabrication for 2007 started

  11. Key resources: RILIS • 164 total RIB shifts • 146.5 shifts for INTC shifts • 2132 hours for online work • includes setup, etc • 120 h offline (development Hg [Po], offline Cu) • 20 IS projects + 1 LoI Beams: Mg, Cu, Ag, Mn, Zn, Cd, Sb, Sn, Po, Be

  12. REX-ISOLDE 2006 • 114 RIB shifts delivered to experiments • 9 more RIB shifts for development • Stable beam, setup time … • 11 experiments • Allocated time for REX-MD • Optimized setup/tuning by REX machine supervisors • E ≤ 2.9 MeV/u • Limited energy [9-gap] • E=3.15 MeV/u (8Li) • Efficiency > 5% average • Range 2.8% - 9.6% • Reliable • Good success rate

  13. REX-ISOLDE 2002-2006

  14. REX-ISOLDE 2006 IS418: Towards the doubly magic 100Sn (CERN/Lund) IS446: Investigation of the 8Li(d,p)9Li reaction at REX-ISOLDE (CERN) IS415: g-factors in Xe/Te (Bonn) IS411: B(E2) measurements around 132Sn (Munich) IS412: Towards the doubly magic 78Ni (Leuven) IS435: Coulex of Cu isotopes, N=40 (CERN/Leuven) IS409: Fusion reactions with n-rich Mg (Köln) IS410: Single particle and collective effects in n-rich Mg (Heidelberg) IS438: Elastic scattering and fusion studies in the reactions 10,11Be+64Zn (Catania) IS444: Exploring halo effects in scattering of 11Be on heavy targets at REX (Madrid/Sevilla)

  15. REX ISOLDE 2006 • New REX radioactive beams for Physics in 2006 • 8Li3+ • 10Be3+ • 29,31Mg9+ • 67,71,73Cu19+,20+ • 80Zn21+ • 144Xe34+ 45 radioactive isotopes of 17 elements • 5 years after 1st post-accelerated RIB (30 Oct 2001) • Charge breeding of heavy elements successful • Other developments

  16. Standing group for the upgrade of ISOLDE Target priorities • First priority: approved experiments • Second priority: letters of intent • Third priority: research and development

  17. Priority 1 [Approved experiments] REX-ISOLDE • 17F IS424 LaF+/F+ ongoing • n-rich Ba IS411 BaF+ EBIS problem 2006 • n-rich Te IS411/IS415 Quartz/RILIS • 11Li IS399 Yield… • Sr beams IS451 SrF+ EBIS problem 2006 • 182-184Hg IS452 Breeding/bckg • Ni IS412 C coating low yields

  18. Priority 1 [Approved experiments] • n-deficient Mg, 21Mg • IS427 COLLAPS [ongoing: Ti, SiC yields vs. Na background] • Br beams • IS431 NICOLE + I59 (decay) [ongoing: negative ion sources] • 62Ga • IS413 ISOLTRAP + IS406 TAGS [ongoing: TiO2-free ZrO2, RILIS?] • n-deficient Te beams • IS428 COMPLIS [ongoing: CeO + FEBIAD tested] • MiniMono ECR source • IS445 (REX + decay), IS420 (decay), [IS413] [Offline tests] • C beams • IS445 (REX + decay) [HfO target + MiniMono]

  19. Priority 2 [Letters of intent] • Po beams • LoI I57 In source spectroscopy [RILIS, done 2006] • Al beams (25Al, 26mAl) • LoI I63 Astrophysics [SiC tested, AlF+] • Ge beams • LoI I58 REX-ISOLDE (GeS+) [on hold]

  20. Priority 3 [R&D] • LIST RILIS + suppression of alkalis [ongoing] • Negative ion sources LaB6, KENIS, new developments [ongoing] • Studies of nanomaterials • Systematic studies of actinide targets • EURISOL • Other studies

  21. Accelerator schedule 2007 Approved 29 Nov 06 • ISOLDE dates 2007 • Protons start 16 Apr • Physics start 23 Apr • Protons stop 12 Nov i.e. 29 weeks for Physics Expected frequent changes of supercycles (as 2006)

  22. ISOLDE schedule 2007 • Support restricted by LHC startup • Limits in key resources • RILIS • UCx • REX available end of May • Miniball ready for Physics ~25 June • Schedule: • 580 RIB shifts left for approved experiments • New proposals and addenda INTC 15-16 Feb 2007

  23. Some highlights 2006

  24. IS412: CoulEx of 80Zn @ REX-ISOLDE • 80Zn @ REX-ISOLDE • 4.5 days stable data taking • RILIS on/off • E(2+) and B(E2,2+→ 0+) [J. van de Walle et al.]

  25. (1/2-) 71Cu 454 keV 7/2- (7/2-) 1190 p3/22+ (70Ni) (f7/2)-1 (7/2-) 981 104Pd 71Ga (5/2-) 534 DC for A=71 new (1/2-) 454 71Cu42 (3/2-) IS435: CoulEx of Cu isotopes [I. Stefanescu et al.] 71Cu (1/2-) 5/2- 120Sn DC for A=71 I. Stefanescu et al.

  26. BaF2-2 Ge-1 Beta 523 1/2+ ISOLDE beam BaF2-1 IS441: ATD in Sn region [H. Mach et al.] • Very pure Sn beam newly extracted as Sn34S+ molecule • 134Sn, 136Sn decays studied → 135Sb structure • New level at 523 keV, T1/2 = 1.2 ns • B(E2;1/2+ → 5/2+) ~ 14 W.u. (collective) • 136Te: B(E2, 2+ → 0+)

  27. e+ e+ A A A A A ZX ZX ZX ZX ZX e+ A A A Z-1Y Z-1Y Z-1Y A A ZX Z-1Y e+ e+ IS413: in-trap decay mass spectroscopy [A. Herlert et al.] not produced at ISOLDE 4He 4He + e+ 4He 4He 4He 20 cm z (mm) 4He 4He 4He 4He 61Fe+ 4He Preparation trap

  28. IS437: Trap-assisted decay spectroscopy at REXTRAP β-decay half-life and Qβ value of the superallowed 0+→0+ β-decay of 38Ca • ISOLDE molecular 38Ca19F+ beam • Break-up and cleaning of daughter 38mK at REXTRAP → pure 38Ca source • Half-life measurement after REXTRAP • Simultaneous mass measurement at ISOLTRAP (beam sharing) [B. Blank et al.] 38Ca simulation

  29. NMR 33Mg, MgO |A| (I+1/2) NMR HFS 33Mg A/g ≈ const ≈ -AI/2>0 ≈ A (I+1)/2<0 |A| (I+1/2) IS427 - COLLAPS: 33Mg [D. Yordanov, G. Neyens et al.]

  30. IS448:Pb(II) and Hg(II) binding to de novo designed proteins [L. Hemingssen et al.] • 199mHg-perturbed angular correlation of γ-rays (PAC) spectroscopy Fundamental knowledge of Pb(II) and Hg(II) interaction with proteins Structure and dynamics at de novo designed metal ion binding sites Clues to the molecular basis of toxicity of these heavy metals pH Titration of Hg-TRIL9C. Fourier transform of the PAC data (thin line) and of the fit (bold faced line). For all three experiments the TRIL9C:Hg(II) ratio was 12:1 (excess of peptide). pH 8.7 Transition from linear [HgS2] complex (pH 6.5) to trigonal [HgS3]-complex pH is a regulatory switch pH 7.9 pH 6.5

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