Recent Results from ISOLDE and new Opportunities with HIE- ISOLDE

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1 Recent Results from ISOLDE and new Opportunities with HIE- ISOLDE Mark Huyse IKS, K.U.Leuven, Belgium 7/05/2009 Mark Huyse 1

2 The many lives of ISOLDE Prof. Bjorn JONSON (Chalmers University of Technology) 7/05/2009 Mark Huyse 2

3 CERN accelerator complex 1.2x10 13 pps 1 or 1.4 GeV p 7 May 2008 CERN Academic Training Programme 7/05/2009 Mark Huyse 3

4 Mark Huyse 7/05/2009 Mark Huyse 4

5 RIB - Production reactions spallation GeV p 201 Fr fragmentation + + Spallation Fragmentation Fission n- (thermal or energetic), p-induced Photofission (e-beam) Fusion p n 238 U fission 11 Li 143 Cs X + + Y 7/05/2009 Mark Huyse 5

6 Target Ion-source matrix UC 66.9 % Target Target p+ p+ Converter Converter Target Standard 7/05/2009 Mark Huyse 6

7 Surface & plasma ionization 7/05/2009 Mark Huyse 7

8 Laser ionization 7/05/2009 Mark Huyse 8

9 ISOLDE Table of elements H Li Be ION SOURCE: + SURFACE hot PLASMA cooled LASER He B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr 7/05/2009 Mark Huyse 9

10 ISOLDE yields, So far >600 radioactive isotopes of >60 60 kev 7/05/2009 Mark Huyse 10

11 October 2001: a new dimension Post acceleration by REX-ISOLDE up to 3 MeV/u 7/05/2009 Mark Huyse 11

REX-ISOLDE OVERVIEW Nier-spectrometer Select Select the the correct correct A/q A/q and and separate separate the the radioactive radioactive ions ions from from the the residual residual gases.

4A 3-6 3-6 kev kev Breeding Breeding time time 3 3 to to >200 >200 ms ms Total Total capacity capacity 6 10 6 10 10 10 charges charges A/q A/q < < 4.5 4.

12 REX-ISOLDE OVERVIEW Nier-spectrometer Select Select the the correct correct A/q A/q and and separate separate the the radioactive radioactive ions ions from from the the residual residual gases. gases. A/q A/q resolution resolution ~150 ~150 Optional stripper EBIS EBIS Super Super conducting conducting solenoid, solenoid, 2 2 T Electron Electron beam beam < < 0.4A 0.4A kev kev Breeding Breeding time time 3 3 to to >200 >200 ms ms Total Total capacity capacity charges charges A/q A/q < < MASS SEPARATOR REXEBIS ISOLDE 9-GAP RESONATOR 7-GAP RESONATORS IH RFQ Rebuncher ISOLDE beam Primary target High energy driver beam Experiments Linac Linac 3.0 MeV/u 2.2 MeV/u 1.2 MeV/u Length Length m Freq. Freq. 101MHz 101MHz (202MHz (202MHz for for the the 9GP) 9GP) Duty Duty cycle cycle 1ms 1ms 100Hz 100Hz (10%) (10%) Energy Energy 300keV/u, 300keV/u, 1.2-3MeV/u 1.2-3MeV/u A/q A/q max. max (2.2MeV/u), (2.2MeV/u), (3MeV/u) (3MeV/u) 0.3 MeV/u Total Total efficiency :: % REXTRAP 7/05/2009 Mark Huyse kev REX-trap Cooling Cooling (10-20 (10-20 ms) ms) Buffer Buffer gas gas + + RF RF (He), (He), Li,...,U Li,...,U ions/pulse ions/pulse protons (Space charge effects >10 (Space charge effects >10 5 ) 5 )

13 World ISOL accelerated beams FACILITY DRIVER POWER (kw) USER BEAMS ACCELERATED ENERGY (MeV/u MeV/u) PHYSICS REACH LOUVAINE-LA LA- NEUVE (BELGIUM) MeV protons 6 6 He, 7 Be, 35 Ar Be, 10,11 C, 13 N, 15 O, 18 F, 18,19 Ne, C, N, O, F, Ne, 10 cyclotron Astrophysics Nuclear structure HRIBF Oak Ridge (USA) MeV p, d, α 1 7 Be, 17,18 F, 69 As, Cu, Ge, 69 As, Se, 92 Sr, 118,120,122,124 Ag, 128, Sn, 129,132,134,136 Te Cu, 67, Ga, 80, Ga, Sn, 129 Sb, Sb, 2-10 tandem (-ve ion source) Nuclear Structure, Astrophysics ISAC TRIUMF (CANADA) MeV protons 50 8,9,11 Li, , 22, Be, 18 F, 29 Na, 23 Mg, 26 Al linac Astrophysics, Condensed matter, Nuclear Structure SPIRAL GANIL (FRANCE) MeV/u heavy ions 6 6,8 He, 14,15,19-21 O, 18 F, 17-19,23 19, Ne, 33-35, 35, 44,46 Ar, Kr Ne, Ar, Kr 2-25 cyclotron Nuclear structure, Astrophysics REX ISOLDE (CERN) GeV protons 3 8,9 Li, Be,10 C, 17 F, Na, 28-28,30 28,30-32 Mg, Mn, Fe, 68 Ni, Cu, 74,76,78,80 Zn, 70 Se, 88,92 Kr, 96 Sr, 108 In, 106,108,110 Sn, 100,102,104,122,124,126 Cd, 138,140,142,144 Xe, 140,142,148 Ba 148 Pm, 153 Sm, 156 Eu, 182,184,186,188 Hg, 202,204 Rn linac Nuclear structure, Condensed matter, Astrophysics So far 63 radioactive isotopes of 24 elements 7/05/2009 Mark Huyse 13

14 Users & Science D 29% B 11% E 4% OTH 6% RO 2% CZ 1% I 1% IL 1% UK 4% NO 1% BG 1% DK 3% IRL <1% FIN 3% PL 5% P 3% S 5% F 19% 450 users 25 countries; 100 institutions 175 projects (4 years) 7/05/2009 Mark Huyse 14

15 A rich basket Solid-state studies Mass measurements Moments and radii Decay studies Coulomb excitation Elastic scattering Transfer reactions 7/05/2009 Mark Huyse 15

16 Thanks to The many lives of ISOLDE The primary beams of CERN Almost the whole nuclear chart is available when combined with e.g. 238 U Continuous target-ion source techniques Laser ion source Innovative beam manipulation Rex concept Innovative experimental set-ups Collaps, ISOLTRAP, MiniBall, Witch, Strong users community 7/05/2009 Mark Huyse 16

17 The fifth decade of ISOLDE 7/05/2009 Mark Huyse 17

18 Technical goals for HIE-ISOLDE ENERGY: REX energy upgrade and increase of current capacity Energy upgrade in 3 stages: 5.5 MeV and 10 MeV/u and lower energy capacity INTENSITY: ISOLDE proton driver beam intensity upgrade - strongly linked to PS Booster improvements including linac4 Faster cycling of the booster New target stations for ISOLDE New targets New target handling system QUALITY: ISOLDE radioactive ion beam quality more than half already financed through the ISOLDE collaboration Smaller longitudinal and transverse emittance Done RFQ cooler operational RILIS upgrade and LARIS construction Done Charge breeder upgrade Better mass resolution Continue target and ion source developments 7/05/2009 Mark Huyse 18

Upgrade of the on-line RILIS Diode Pumped Solid State Nd:YAG Lasers as replacement of Copper Vapor Lasers: CVL SSL 15 ns @ 11 khz 8 ns @ 10 khz Green Beams 45 W @ 511 nm Yellow Beams 35 W @ 578 nm

19 Upgrade of the on-line RILIS Diode Pumped Solid State Nd:YAG Lasers as replacement of Copper Vapor Lasers: CVL SSL khz 8 10 khz Green Beams nm Yellow Beams nm Green Beams nm UV Beam nm IR Beam nm Ga ion beam has been produced with the SSL Improvement of ionization efficiency by SSL : λ 2 = λ CVL λ 2 = λ SSL Two dye lasers were applied at 1 st step of excitation - x 2.2 λ 1 = 1 2 λ DL 46% λ 1 = 1 2 λ DL 54% 46% More power could be delivered to HRS target at the 2 nd step of excitation And CVLs are still available for runs 7/05/2009 Mark Huyse 19

20 Shape coexistence in the Pb region 182 Pb: T 1/2 55 ms 1 count/min 186 Pb A.Andreyev et al. Nature, 405, 30 (2000) ISOLDE; more than 30 years ago Resonant Laser Ionization Pb: H. De Witte et al. PRL 98 (2007) Po: T. Cocolios et al., under analysis 7/05/2009 Mark Huyse 20

ISCOOL: RFQ-COOLER Results + further studies High transmission efficiencies Space charge limits (up to 10 8 /s) 10 x decrease in emittance Easy beam tuning Bunching New

21 ISCOOL: RFQ-COOLER Results + further studies High transmission efficiencies Space charge limits (up to 10 8 /s) 10 x decrease in emittance Easy beam tuning Bunching New applications (see further) Yield measurements: continuous vs. bunched Losses due to trapping time 75 Ga Continuous photon counting Photons gated by ion bunch 7/05/2009 Mark Huyse 21

22 Spin assignment from in-source laser spectroscopy Yield of 75 Cu ~ 5x10 4 /uc 5 out of 6 peaks resolved Kieran Flanagan et al. 7/05/2009 Mark Huyse 22

23 Beam manipulation in REXTRAP and REX-EBIS Jarno Van De Walle et al. 7/05/2009 Mark Huyse 23

24 The proposed HIE-LINAC 3 stages installation 1.2 MeV/ u 3 MeV/ u 5.5 MeV/ u 10 MeV/ u Matteo Passini Review panel of HIE-LINAC R&D work June /05/2009 Mark Huyse 24

25 Beam parameters 7/05/2009 Mark Huyse 25

26 The proposed HIE-LINAC layout 7/05/2009 Mark Huyse 26

27 What becomes possible with the upgrade Intensity Not a step function but important for all users Quality of the beam ISCOOL Energy of the beam Solid-state physics 7/05/2009 Mark Huyse 27

28 Solid-state physics 7/05/2009 Mark Huyse 28

29 What becomes possible with the upgrade Intensity Not a step function but important for all users Quality of the beam ISCOOL Energy of the beam Solid-state physics Nuclear physics Decay studies 7/05/2009 Mark Huyse 29

30 Rare charged-particle decay studies a EC/β+ βdf γ γ γ γ γ γ γ γ γ Bf,i Bf,e Spontaneous fission Implantation-decay tagging Successfully used at LLN, TRIUMF, KVI Andrei Andreyev, Riccardo Raabe et al. 7/05/2009 Mark Huyse 30

31 What becomes possible with the upgrade Intensity Not a step function but important for all users Quality of the beam ISCOOL Energy of the beam Solid-state physics Nuclear physics Decay studies Coulomb excitation 7/05/2009 Mark Huyse 31

32 The Coulex program ,184,186,188 Hg 202,204 Rn ,108,110 Sn 70 Se 96 Sr, 88 Kr, 92 Kr 122,124 Cd 138,140 Xe 140,148,150 Ba 28 74,76,78,80 Zn 61,62 Mn, 61,62 Fe 67,69,71,73 Cu, 68 Cu, 70(m) Cu 68 Ni 30,31,32 Mg 20 7/05/2009 Mark Huyse 32

33 Coulomb excitation Hg 184 Hg 186 Hg 188 Hg 98+/-14 Hg x rays Hg x rays Cd Nick Bree, Andrew Petts et al. + + coincidences with /05/2009 Mark Huyse 33

34 A step function in the Coulomb excitation studies SPIRAL Coulex will preferentially populated states strongly coupled to g.s. Non-yrast states Distinction between prolate and oblate deformation Degree of collectivity and degree of mixing can be deduced 7/05/2009 Mark Huyse 34

35 What becomes possible with the upgrade Intensity Not a step function but important for all users Quality of the beam ISCOOL Energy of the beam Solid-state physics Nuclear physics Decay studies Coulomb excitation Nuclear reactions 7/05/2009 Mark Huyse 35

36 Nuclear reactions for astrophysics Lower energies are needed Adopted instrumentation See e.g. TUDA 7/05/2009 Mark Huyse 36

37 A step function in transfer reaction studies Due to the higher energy Higher cross sections Better detection sensitivity Less model dependence of spectroscopic factors Dedicated recoil spectrometer Courtesy Vinzenz Bildstein 7/05/2009 Mark Huyse 37

foil 0.5 mg/cm 2 Ti foil atomic ratio 3 H/Ti 1.

38 Search for the second 0 + state in 32 Mg applying a two-neutron transfer reaction Tritium loaded Titanium foil 0.5 mg/cm 2 Ti foil atomic ratio 3 H/Ti 1.5 Beam intensity 4x Mg/s 7/05/2009 Kathrin Mark Wimmer Huyseet al. 38

39 Roadmap to HIE-ISOLDE The HIE-ISOLDE project is a participative project Direct member state contributions should be at least 50% The first phase has been launched RFQ cooler UK, Germany, France and Finland RILIS replacement Sweden LINAC development and prototyping Belgium Different grant requests are in progress Discussion at the CERN level on the MidTermPlan are ongoing 7/05/2009 Mark Huyse 39

40 Thanks and you are all kindly invited to: 7/05/2009 Mark Huyse 40

Present ISOLDE facility Aims of HIE-ISOLDE upgrade First steps towards HIE-ISOLDE

The HIE-ISOLDE ISOLDE Project Alexander Herlert, CERN Present ISOLDE facility Aims of HIE-ISOLDE upgrade First steps towards HIE-ISOLDE Hirschegg Workshop 2008 B. Jonson s talk at the last ISOLDE workshop