L.M. Fraile, CERN PH/IS ISOLDE scientific coordinator’s report INTC meeting, 15 February 2007...

L.M. Fraile, CERN PH/ISL.M. Fraile, CERN PH/IS

ISOLDE scientific coordinator’s reportISOLDE scientific coordinator’s reportINTC meeting, 15 February 2007

ISOLDE scientific coordinator’s reportISOLDE scientific coordinator’s reportINTC meeting, 15 February 2007

Impact of technical issuesRunning statistics 2006Report from SGUIPlanning for 2007

L.M. Fraile INTC 15 February 2007

Failures 2006 (affecting Physics): Failures 2006 (affecting Physics): StartupStartup

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)

CONSECUENCESIS427 cancelled 11 shift lost rescheduledIS401/442 modified physics aim + lost 2.5 shiftsIS358 no physics outcome + lost 4.5 shifts [also RILIS]IS383/428 cancelled 17 rescheduledIS413 little physics outcome 5 [also power cuts]IS442 modified collections 3


Failures 2006: Failures 2006: CERN Power cutsCERN 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 ~ 7:45Again 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


Main failures 2006: Main failures 2006: Beam issues Beam issues et al.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…


Request for Schedule 2006Request 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


ISOLDE beam time summary 2006ISOLDE 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


ISOLDE shift distribution

0

50

100

150

200

250

300

350

400

2000 2001 2002 2003 2004 2005 2006

Nu

mb

er o

f sh

ifts

0.0

0.5

1.0

1.5

2.0

2.5

Sh

ifts

/da

y

Delivered shifts HRS shiftsGPS shifts Shifts per day

ISOLDE beam time summary 2006ISOLDE beam time summary 2006


ISOLDE shift distribution 2006ISOLDE shift distribution 2006

Development experiments

1.7%

Target & IS development (+REX

MD)13.8%

Coordinator's reserve

6.3%

Biology and Medicine

0.4%

Particle and Astrophysics

3.7% Atomic Physics11.1%

Solid State Physics10.0%

Weak Interaction and Nuclear

Physics53.2%


Shift distribution 1998-2006Shift distribution 1998-2006

0

20

40

60

80

100

120

140

160

180

200

Biology and Medicine

Particle and Astrophysics

Atomic Physics

Solid state physics

Weak Interaction andNuclear Physics

Num

ber

of s

hifts


Key resources: targetsKey resources: targets

Target distribution 2006

UC/ThC 56%

CeO 4%

Ti 4%

SiC 3% Sn 3% Pb 2%

ZrO 1%TISD 1%

Ta 11%

LaC 6%

Nb 6%

MgO 4%

Actinide targets→ 196 shifts (out of 350.5) [56%]→ 11 new units (includes prototypes)

→ Fabrication for 2007 started


Key resources: RILISKey resources: RILIS

RILIS % from INTC shifts 2006

Rest 48%

RILIS52%

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


REX-ISOLDE 2006REX-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

REX % from INTC shifts 2006

Rest ISOLDE59%

REX41%


REX-ISOLDE 2002-2006REX-ISOLDE 2002-2006

REX-ISOLDE RIB shift distribution

0

25

50

75

100

125

150

2002 2003 2004 2005 2006

Nu

mb

er o

f sh

ifts

0%

5%

10%

15%

20%

25%

30%

35%

40%

45%

REX-ISOLDE shiftsREX-ISOLDE shifts with MDPercentage of INTC shifts


REX-ISOLDE 2006REX-ISOLDE 2006

IS438: Elastic scattering and fusion studies in the reactions 10,11Be+64Zn (Catania)

IS412: Towards the doubly magic 78Ni (Leuven)

IS411: B(E2) measurements around 132Sn (Munich)

IS418: Towards the doubly magic 100Sn(CERN/Lund)

IS435: Coulex of Cu isotopes, N=40 (CERN/Leuven)

IS415: g-factors in Xe/Te (Bonn)

IS446: Investigation of the 8Li(d,p)9Li reaction at REX-ISOLDE (CERN)

IS409: Fusion reactions with n-rich Mg (Köln)

IS410: Single particle and collective effects in n-rich Mg (Heidelberg)

IS444: Exploring halo effects in scattering of 11Be on heavy targets at REX (Madrid/Sevilla)


REX ISOLDE 2006REX 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 successfulOther developments


Standing group for the upgrade of ISOLDEStanding group for the upgrade of ISOLDE

Target priorities

First priority: approved experiments Second priority: letters of intent Third priority: research and development


Priority 1 [Approved experiments]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


Priority 1 [Approved experiments]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]


Priority 2 [Letters of intent]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]


Priority 3 [R&D]Priority 3 [R&D]

LISTRILIS + suppression of alkalis [ongoing]

Negative ion sourcesLaB6, KENIS, new developments [ongoing]

Studies of nanomaterialsSystematic studies of actinide targetsEURISOLOther studies


Accelerator schedule 2007Accelerator 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)


ISOLDE schedule 2007ISOLDE 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


Some highlights 2006Some highlights 2006


IS412: CoulEx of IS412: CoulEx of 8080Zn @ REX-ISOLDEZn @ 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.]


IS435: CoulEx of Cu isotopesIS435: CoulEx of Cu isotopes

I. Stefanescu et al.

71Cu(1/2-)5/2-

120Sn

DC for A=71

104Pd

7/2-

71Cu

71Ga

(1/2-)454 keV

DC for A=71

(3/2-)

(5/2-)

(1/2-)

(7/2-)

(7/2-)

71Cu42

454

534

981

1190

(f7/2)-1

p3/22+ (70Ni)

new

[I. Stefanescu et al.]


IS441: ATD in Sn regionIS441: ATD in Sn region

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+)

523 1/2+Ge-1Beta

BaF

2 -1

BaF

2-2

ISOLDE beam

[H. Mach et al.]


ZXAZ-1YA e++

not producedat ISOLDE

100 mm

0

50

main electrodes

correction electrodes

Uz (V)

0

50

100

-50

-100

0 40 80

20 c

m

z (

mm

)

4He

4He

4He

4He

4He

4He

4He

4He

4He

4He

e+

e+

ZXA

ZXA

e+

ZXA

Z-1YA

Z-1YA

Z-1YA

ZXA

e+

ZXA

e+

[A. Herlert et al.]

IS413: in-trap decay mass spectroscopyIS413: in-trap decay mass spectroscopy

Preparation trap -6 -4 -2 0 2 4 6

240

260

280

300

320

mea

n T

OF

/ µ

s

(c - 1490700.3 Hz) / Hz

61Fe+


38Ca simulation

• 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.]

β-decay half-life and Qβ value of the superallowed 0+→0+ β-decay of 38Ca

IS437: Trap-assisted decay spectroscopy at REXTRAPIS437: Trap-assisted decay spectroscopy at REXTRAP


IS427 - COLLAPS: IS427 - COLLAPS: 3333MgMg

[D. Yordanov, G. Neyens et al.]

Preliminary results

g = - 0.4971(4) I = 3/2

NMR 33Mg, MgO

A/g ≈ const

HFS 33Mg

NMR

|A| (I+1/2) ≈ -AI/2>0≈ A (I+1)/2<0

|A| (I+1/2)


IS448:Pb(II) and Hg(II) binding to de novo IS448:Pb(II) and Hg(II) binding to de novo designed proteinsdesigned 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 8.7

pH 7.9

pH 6.5

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).

Transition from linear [HgS2] complex (pH 6.5) to trigonal [HgS3]-complex

pH is a regulatory switch

L.M. Fraile, CERN PH/IS ISOLDE scientific coordinator’s report INTC meeting, 15 February 2007...

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