Magdalena Kowalska, CERN PH-SME-IS

ISOLDE scientific coordinator’s reportISCC meeting, July 6, 2011

Beam requests and schedule 2011Experimental statisticsStatus of experiments and ISOLDE hallSafetyLong shutdown

New and active experiments at ISOLDE

81 active experiments for 2011 beam period (+10 LOIs) (55 data-taking and 26 in preparation); compared to 63 in 2010;

INTC February 2011• 12 new experiments: IS511 – IS522• 245 approved RIB shifts (out of 403 requested)• 6 experiments completed (2 REX experiments):

IS425, IS435, IS439, IS449, IS470, IS480

Injector schedule 2011 (v3.1)

ISOLDE dates:

protons from PSB April 27physics start ISOLDE May 2protons stop November 21(i.e. ~29 weeks for physicslike in 2010)

Several long periods of MDpartly with parasitic beam toISOLDE (not guaranteed)

Regular technical stops with no protons - 5.5 days in total (only stop 1 changed and influenced ISOLDE)

Beam requests and schedule 2011

• Beam requests (from approved experiments):• 657.5 RIB shifts requested by 59 INTC experiments (22 with no request)

• Compared to 627 in 2009 and 2010• Requested RILIS shifts: 376 57 % (359 in 2009 and 350 in 2010)• Requested REX-ISOLDE RIB shifts: 323.5 (273 in 2009 and 333 in 2010)

• Additional 60.5 shifts for TISD, LOIs + on-line MD …

• Scheduled runs:• 491.5 RIB shifts in total (469 in 2010)

• 440 RIB shifts for 48 experiments (432 in 2010)• 33 experiments not scheduled (11 of those requested beam)• 233 online RILIS shifts (ca. 2100h of online + offline operation)• 12 REX-ISOLDE runs for 14 experiments with 190.5 RIB shifts (43 %) (160 in 2010)

Beam requests and schedule 2011

ISOLDE running period 2011

ISOLDE program 2011(v2.2):

physics started May 2protons stop Nov. 21

29 weeksfor physics

• 48 IS experiments• 5 TISD runs• 8 LOIs• >490 RIB shifts

Scheduled:

GPS HRS

GPS robot problem

In the middle of wk24 GPS robot developed a problem: no GPS physics for up to 6 weeks:GPS runs in wk24-25 moved to HRS (WITCH and SSP); HRS run in wk26 cut by 1 day in setup and 2 days in physics ; SSP run and tilted-foil LOI in wk27 cancelled;

Schedule before:

Schedule after:

GPS HRS

Thanks to the ISOLDE technical teams for setting up beams in a reduced time and even on the weekend and late evenings!

Spare part arrives after 2 weeks: SSP run in wk27 reestablished;Only titled-foil LOI has to be cancelled (colliding with REX setup on HRS)

REX runs 2011

• 14 IS experiments• 1 online MD run• 1 LOI• 190 RIB shifts

Scheduled:

Targets 2011

• 27 target units planned• 12 for HRS• 15 for GPS• Some old or to-be-reused units• 11 new UC units (+ 1 ThC)

• TISD• 5-6 dedicated runs:

Sm RILISMg LISTDy RILIS(Pr RILIS)HfO-CPTo be defined at SGUI meeting

RILIS runs 2011

• 17 RILIS runs planned (combined in 14 runs)• several target tests• Ti:Sa lasers used for some runs• New beams: At, Sm, Dy, (Pr)• 14 elements

• >240 RIB shifts planned• Ca. 2100h operation

First online runs

• Successful TISD runs: Mg beam + LIST, RILIS rare earths: Sm, Dy, (Pr), At RILIS

• Successful physics:- Online emission channeling on 27Mg (after previous failed trials)- n-def Ga at COLLAPS – in spite of serious problems with ISCOOL and merging

switchyard- Beta-delayed fission on n-def Fr isotopes – in spite of sparking in ISCOOL- Most solid-state and biophysics runs with YO-HP, Ta-W, and Sn targets- n-deficient Pb isotopes: first run on MINIBALL in 2011- Coulex on 140Nd – first physics use of low work-function cavity + RILIS

• Partly successful physics:35Ar for WITCH – in spite of GPS unavailability, ISCOOL repair, and broken

target (proton scan and yield checks exceptionally on Saturday)

• Unsuccessful physics:Due to too strong contamination: 48Cr, 75Se, 77Br for SSP with YO-HP; Due to not enough beam: n-rich At and Dy for ISOLTRAP; 140Pr for COLLAPS

(other masses and magnetic moments measured instead)

Experimental statisticsCalendar years between proposal acceptance

and first counted shifts (for active proposals and those closed in 2010 and 2011)

(note: first attempts often result in 0 shifts counted, real waiting time is lower than that presented) Same

year1 year

2 years

3 years

Average < 1 year

Status of experiments

• CRIS beamline fully operational; alpha decay station being tested at ISOLDE

Status of experiments

• Beta-NMR tilted-foils setup ready and taking REX stable beam this week

Status of experiments

• WITCH intermediate field allows REX mass scaling (but due to other problems new REX settings for many masses are not yet available)

• WITCH got first preliminary physics results: in spite of opening up the setup 2 times just before the run

• ISOTRAP recovered quickly from a magnet quench (in February, exactly 1 year from the previous one)

• MINIBALL T-REX chamber used successfully for Coulex experiments

• GLM will soon see a new diffusion chamber (tested in b. 275 and to be tested at LA1)

• Digital perturbed angular correlation setup in b. 115 delivering high-quality data

• ASPIC will be revived: student from Korea assisted by A. Gottberg (Thierry’s fellow)

Status of experiments

• WITCH intermediate field allows REX mass scaling (but due to other problems new REX settings for many masses are not yet available)

• WITCH got first preliminary physics results: in spite of opening up the setup 2 times just before the run

• ISOTRAP recovered quickly from a magnet quench (in February, exactly 1 year from the previous one)

• MINIBALL T-REX chamber used successfully for Coulex experiments

• GLM will soon see a new diffusion chamber (tested in b. 275 and to be tested at LA1)

• Digital perturbed angular correlation setup in b. 115 delivering high-quality data

• ASPIC will be revived: student from Korea assisted by A. Gottberg (Thierry’s fellow)

News from ISOLDE• More free space in ISOLDE

extension, SAS area, and b. 275 thanks to clean-up actions during shutdown

• Rearrangement of the control room• New rules for kitchen use -> more

tidy• Jungle behind ISOLDE cut• Pre- and turbo-pumps for common

use available: contact J. Thiboud• Improved supply of electronics

modules (key with MK)• Simple digital DAQ system in

demand (MINIBALL tests, CRIS, ISOLTRAP)

• ISOLDE offices fully occupied during summer (students, visitors)

Safety

• Safety files for fixed experiments evaluated by safety responsibles: reports and steps to follow with local responsibles -> to be addressed until next running period

• Improved traceability of implanted samples: Karl’s database includes storage location and is available to RP personnel

• Extension of b. 115 and move of SSP lab from b.275 under way: funding guaranteed, planned for this shutdown

• ISOLDE will have a dedicated “RP expert” who will take care of sources, etc: J. Thiboud will follow a 2-week RP course in Lausanne (cost covered by RP)

• Key cabinet with access only for those with valid ISOLDE access will be installed next Monday in ISOLDE control room: place for common ISOLDE keys; traceability of who/and when took which key

• Problems with some RP shipments and source requests due to personnel issues at RP: informed the RP Group Leader, Doris Forkel-Wirth

Safety• Rearrangement of b. 115: all samples and sources stored in a well separated area;

chemistry and measurement area also separated

Long shutdown

• Most probable scenario: physics for everybody until December 2012Injectors restart in April/May 2014No Linac4 connectionTo be decided at the beginning of 2012

Thank you

Shift distributionShift distribution

Shift distributionShift distribution

Resources: targets 2010Resources: targets 2010

• Actinide targets• 244 shifts (out of 350) [72%]• 12 new units + 2 old (one not used)

• In total 25 targets• 21 new units• 1 not used

Resources: RILIS 2010Resources: RILIS 2010

• 158.5 total RIB shifts (155.5 in 2009)• 151 shifts for INTC experiments

• ~2000 hours for online work• includes setup, yield checks, etc.• >2100 hours total running time (incl. off-line tests)

• 20 IS experiments (20 in 2009)

• Beams: Mg, Cu, Ga, Tl, Be, Pb, Mn, Au, Be, Zn, Ag, At (all with Nd:YAG pump lasers and new dye lasers)

Resources: RILIS 2010Resources: RILIS 2010

Resources: REX 2010Resources: REX 2010

100 shifts

Latest Accelerator schedule 2011Latest Accelerator schedule 2011

protons to ISOLDE April 25physics start ISOLDE May 2protons stop November 20(i.e. 29 weeks for physics vs 29.5 in 2010)

Protons:December Research Board approves 34% proton pulses for ISOLDE

nTOF starts in March: ISOLDE can get 1 proton pulse more during nights

=> ISOLDE is guaranteed 34-37% proton pulses (ca.1.5uA)

ISOLDE dates (as in Nov.)

Beta-NMR

System for manipulating foils and connected parts machined in Rehovot (Ch. Sotty went there last week to see what needs changing); will be sent to CERN next week

Tests of scintillator efficiency planned for next week (when G. Georgiev comes to CERN)

Machining of remaining parts and installation of chamber: spring 2011

Running period 2011: system should be ready for 1st online tests

PhD students are presently analysing Miniball data from 2010

WITCH

• Additional shielding for REX mass separator installed and tested in December:• magnet at nominal field: losses when scaling masses•Magnet at ca 50% of the field: full mass scaling possible after re-steering the beam•Difficult access to REX diagnostics=> REX operation and scaling possible after finding new settings for each mass range; details to be discussed with Fredrik and Didier

• Physics run on 35Ar scheduled for week 46 had to be cancelled: WITCH trap damage due to over-baking

ISOLTRAP decay-spectroscopy station

• commissioning beamtime in Sep 2009

• first real online run in Nov 2010, assisting mass measurements: determination of excitation energy and assignment of state to 194Tl isomer

Cleanup

•Offline lab (bldg 275) cleanup: December

• ISOLDE extension cleanup: next week

Safety files for fixed installations

Required by the HSE unit for all CERN experiments; PH-DSO Christopher Griggs as our contact:

• WITCH and CRIS as test cases; files being finalised•Files in preparation by local responsibles until end of February • Feedback and checks of conformity (CE) during the year• Necessary changes implemented this year• Full safety file (most probably) ready for 2012 running period• Visiting installations: presently “safety table” in INTC proposals; a reduced safety file template in preparation

PH-DSO is very happy about our progress:“ISOLDE leads the way is matters of safety at CERN”

News on the ISOLDE web page

News on the ISOLDE web page

List of ISOLDE publications 2009-now:Science&Events -> Publications -> ISOLDE Publications -> Publications 2009-2010

Found:73 publications12 Phys. Rev. Lett.