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Technical report for ISOLDE

Technical report for ISOLDE. Mats Lindroos on behalf of the ISOLDE team. Outline. Shutdown work R&D priority list from upgrade group R&D work at ISOLDE Start-up with new control system REX integration, R&D and operation Technical support for ISOLDE experimental area Towards the future.

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Technical report for ISOLDE

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  1. Technical report for ISOLDE Mats Lindroos on behalf of the ISOLDE team

  2. Outline • Shutdown work • R&D priority list from upgrade group • R&D work at ISOLDE • Start-up with new control system • REX integration, R&D and operation • Technical support for ISOLDE experimental area • Towards the future

  3. Shutdown • Smooth shutdown with repair (and re-installation) of GPS front-end completed • Major “un-scheduled” power cut during start-up phase • ISOLDE facility “survived” • Major additional work for ISOLTRAP • Broken computers • New emergency power-cut procedures in the process of being established

  4. R&D priority list • ISOLDE upgrade group has established a priority list for ISOLDE R&D • http://isolde-upgrade.web.cern.ch/isolde-upgrade/

  5. Priority 1

  6. ATB-IF R&D • P-induced shock waves recorded on Ta, Pb (10 mm diameter cylinders) and CNGS shape Graphite targets. Perpendicular velocity measured every 200 ns, total movement ~30 microns. (Analysis on-going). • Laser induced cavitations in Water jet were measured, (Analysis on-going). • Systematic off-line target tests were extended to emittance measurements and stable mass-scan analysis (test results available on the web). • To ease stable beam exercise of surface ion-sources a mass-marker will be systematically added. • Off-line test of a solid state laser RILIS under way, emittance and absolute ionisation efficiency. (Kim, Thomas, Klaus & ATB-IF) • Front-end 6 being assembled (completion end of June) extended stable beam tests are foreseen (sept). • Pre-study of target vessels, ion-sources feed trough and connectors for 10 micro A beam started. • The emitance of a standard LaB6 negative surface ion-source was measured as a fuction of the electron suppression

  7. AB-OP • ECR source modified and commissioned for 2004 run • RF generator fault prevented Ar tests in April • RFQ cooler design completed • Fabrication of main vacuum vessel in Mainz • Discussion with LMU for fabrication of remianing pieces • Off-line source from MISTRAL mounted in building 275 (with faraday cage) for tests • Grant application in UK (Manchester) for power suuplies, RF generator and Vacuum system

  8. Shutdown 2003-2004: RILIS Development 1. Laser Beam Control On-line control of laser beam positioning using CCD cameras: “Laser Imager” program is available in the new Linux-based control system Image of UV beam at the CCD camera

  9. Shutdown 2003-2004: RILIS Development 2. New ionization schemes Optimal ionization schemes • Dysprosium • Step 1 – l1= 606 - 677 nm – scanned • Step 2 – l2= 606 - 677 nm – scanned • Step 3 – l3=510.6 & 578.21 nm (CVL) - fixed 510.6 nm 578.2 nm Ei=5.94 eV 607.5 nm 625.9 nm Dy RILIS efficiency = ~ 20% b.Yttrium Step 1 – l1= 407 - 414 nm (2w) – scanned Step 2 – l2= 565 - 677 nm – scanned Step 3 – l3= 510.55 nm (CVL) - fixed 510.6 nm Ei=6.22 eV 662.4 nm 414.3 nm Y RILIS efficiency = 80 x surface ion source efficiency

  10. REX-ISOLDE • All REX posts allocated • Work package plan for Operation, maintenance and R&D established • Working group (AB management) to follow full implementation of REX as a CERN facility • Migration of FEC from W95 to XP • Agreement made for CO post • Shutdown work completed • R&D on molecular beams, good results for SeCO and AlF R&D on cooling in REX trap • Hardware upgrade of EBIS (baking system, realignment, interlocks etc) • Mass separator - new beam diagnostic boxes • Commissioning of 9 gap IH structure • New ideas for further upgrade being discussed

  11. DE Cooling Ejection Accumulation B Beam preparation with REX-TRAP • Cooling method tests Cooling by buffer gas collisions 10-4 mbar Ne P. Delahaye Sideband cooling (actual method) Rotating Wall cooling (Investigated method) buffer gas buffer gas + c Dipolar Excitation Quadrupolar excitation quadrupolar rf field in the transversal plane c = q/m B Lorentz force is compressing the ion cloud

  12. Charge exchange process Sideband excitation Cooling by buffer gas collisions 10-4 mbar Ne 130Xe+ ions 40Ar+ ions 78Kr+ ions Of interest for the « ion catcher » devices • Molecule cooling for contaminants free beams • SeCO+, and AlF+ molecular beams tested • SnS+ to be tested P. Delahaye

  13. TOF SeCO

  14. New control system • New LINUX/JAVA based control system commissioned for ISOLDE • Scanners and wire grids still running under windows on dedicated consoles • W95->WXP • Please check USERS applications for XP compatibility • For “introduction” and feed-back please contact Tim Giles

  15. New controls

  16. Technical support at ISOLDE • Re-organization of technical support for ISOLDE in progress • Experimental area section in ATB group and new OP EIC post • Work package plan for all technical support for operation, maintenance and R&D in the experimental area established • More at next meeting…

  17. Towards the future… • Tendering in progress for hall extension • Building start July 2004 • Work on hall partition (with dust barrier) from 1 January to 15 March 2005 • Class A lab under construction • Work on partition 15 November to 15 February 2005

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