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Technical Report for the INTC and ISCC Meetings 16 th November 2009

Technical Report for the INTC and ISCC Meetings 16 th November 2009. Richard Catherall EN-STI-RBS. Outline. Operations throughout 2009 Targets REX Operation, Linac consolidation RILIS Incidents Robot failure, operations Safety Safety Audit New Procedures, Alara , DIMR

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Technical Report for the INTC and ISCC Meetings 16 th November 2009

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  1. Technical Report for the INTC and ISCC Meetings 16th November 2009 Richard Catherall EN-STI-RBS

  2. Outline • Operations throughout 2009 • Targets • REX • Operation, Linac consolidation • RILIS • Incidents • Robot failure, operations • Safety • Safety Audit • New Procedures, Alara, DIMR • 2009/2010 Shutdown Planning • HRS Front End #3 exchange • Vacuum controls consolidation • News from support groups • HIE- ISOLDE • Status

  3. Targets • Target Production • Production of 23 targets, 12 UC2-C. • VADIS – Versatile Arc Discharge Ion Source. • Operated successfully during 2009 • Adapted to different variants of ion sources/transfer lines. • Generated interest at other institutes • BeO target with n_converter for 6He production • Successful tests at the beginning of the year • GdB6 line for laser ionization of Nd • See presentation by T. Stora at ISOLDE Workshop. • Target drawings updated to Catia • Models used for simulations and developments

  4. (1) 72Kr MINIBALL Coulex/shape measu. 2.85 MeV/u  9-gap vacuum failure: run cancelled (2) 94,96Kr MINIBALL Coulex 2.85 MeV/u Isolde vacuum failure half way through the run (3) 62Mn/Fe MINIBALL Coulex 2.86 MeV/u -> Fe isotopes produced by in-trap decay of Mn PSB problems + linac RF (24h stop) (4) 138Xe MINIBALL Coulex/g-factor meas. 2.87 MeV/u (5) 29,30Na MINIBALL Coulex 2.85 MeV/u (6) 200Po MINIBALL Coulex/shape measu. 2.85 MeV/u -> Heavy beam 5% low energy eff. (7) 107,109Sn MINIBALL Coulex energy 2.85 MeV/u -> long run: 10 days (8) 11Be Transfer reactions at MINIBALL 2.86 MeV/u -> stripping foils + isotopically pure buffer gas Cathode failure during setup (9) 66Ni Transfer reactions at MINIBALL 2.9 MeV/u -> long run: 10 days REX campaign 2009 * A number of failures: one run cancelled several runs hampered by problems * Despite all problems we managed to deliver beams to (almost) all users * Some promising results: 200Po, in-trap decay, transfer reaction of 66Ni Courtesy of D. Voulot & F. Wenander

  5. REX-Low energy • REXTRAP control system upgrade • Now foreseen for 2010-2011 shutdown • All groups agree; detailed specification discussions ongoing • PAM - new PicoAmpereMeter for REXTRAP tested • In-house production by BE-BI • Variable integration time, noise level few 100 fA, very promising • To be implemented with the REXTRAP upgrade • REX separator shielding to WITCH magnetic field • Tested beam transport and A/q-scaling with B-field on • transport can work for limited B-field with large steering • A/q-scaling does not work • => WITCH magnet should not be energized while REX is setting up or delivering radioactive beam • Mass resolution tests finished + new in-trap decay results • See D. Voulot’s talk at the ISOLDE workshop Courtesy of D. Voulot & F. Wenander

  6. REX - Linac consolidation I • Linac RF cooling and ventilation New ventilation for the RF room + Modification of RF amplifier (water cooling with heat exchangers) -> improve temperature stability + cleanliness -> longer RF tube lifetime (25kCHF/piece) • Linac shielding Construction of shielding tunnel around the linac -> remove lead boxes on cavities -> faster and easier access to equipment -> less X-ray background at Miniball Courtesy of D. Voulot & F. Wenander

  7. Linac consolidation II • Beam instrumentation controls Replace old control system (RS485, MS Visual Basic Windows based system) with control server based on VME crate + dedicated VME cards -> CERN standard (piquet support, easier to maintain) -> modular system (possibility of extension and modifications) • New tuner mechanics for the 7-gaps Improve reliability and stability -> less RF interruptions -> under construction (maybe installed next year) Courtesy of D. Voulot & F. Wenander

  8. Beta-NMR setup from HMI Berlin Now under installation after REX Polarized beams Mobile Tilted Foil Setup at 2nd beam line Preliminary installed after 2nd beam-line magnet sample chamber scintillators, light guides and PM tubes vacuum system electronics beam-line quadrupole magnet Tests foreseen for June 2010 Stepper motor operational for foil inclination/rotation New larger foils arrived (40x12 mm2) Initial test scheduled for week 48Coulex of stable polarized 21Ne Use Miniball particle and gamma detectors Courtesy of D. Voulot & F. Wenander

  9. Main green beam Residual green beam New Nd:YAG lasers at ISOLDE RILIS Copper Vapor Lasers are replaced by Diode Pumped Solid State Nd:YAG Lasers Two lasers are available: one in use, second as a backup UV beam Laser generates 3 beams at 10 kHz: • Main green beam – 532nm, 70-80 W, 8 ns • Residual green beam – 532 nm, 12-28 W, 9 ns • UV beam - 355 nm, 18-20 W, 11 ns Courtesy of V. Fedosseev

  10. RILIS operation in 1994-2009 Laser ON time in 2009: 2143 h - total 1994 h - on-line Be, Ga, Ag, Nd, Po, Mn, Mg, Po, Sn, Mg, Mn, Be, Zn, Ni In 2009 Nd:YAG lasers have been used for ALL 14 RILIS runs Courtesy of V. Fedosseev

  11. Replacement of the scheme which uses the CVL green beam. Fortuitous Auto-ionizing transition at CVL wavelength AIS search at LARIS Outcome of RIS study of Mn at LARIS: Many new auto-ionizing states found Various promising Nd:YAG based schemes tested New scheme applied at RILIS Efficiency > 8 % A new RILIS scheme for manganese - LARIS result Courtesy of V. Fedosseev

  12. Robot Incidents HRS • Robot failed to pick up target correctly and became jammed at Front End. This after failing 2 weeks earlier. • Human intervention required to retrieve situation. • High collective and individual dose for participants. • The failure, due to the robot incorrectly pulling the target to its pre-defined position was identified and corrected…but at a cost. Correct target pick up Target #407 failed pick-up

  13. GPS – a separate incident Left 1 Right 2 Shelf 3 • Pre-programmed pick and place cycle • Pre-defined locations • E.g. Take target from Front End to door position 322 • Incident occurred because 321 coordinates were saved as position 322. • Human error? Overwritten values…Save as!! • Program manipulation error, software? • Action: • Do not use this shelf position this year. • Test other shelf positions without target before use. • Re-program robot correctly during next shutdown. Shelf 2 Shelf 1 Door #3

  14. Operation - Incidents • GPS.FC490 • Bent due to collision with deflector plate. Interlocks overridden? • Beam losses in BTY line/protons on converter • Caused a reduction in p-beam intensity during Ag run in May/June. • Vacuum control problems including RFQ vacuum • Initiated by CERN-wide power cuts • Water in the hall • Condensation in the air conditioning equipment situated above the control room. • Excessive sparking at FE’s • Dehumidifier fuse • Including dirty extraction electrode tip. • HRS.FC20 isolated because of impossibility to move it. • Failure to remove target #415 from HRS FE#3 last week. • Nmr resets on HRS magnets • Failure of plc’s for target and ion source power supplies • Including 24V power supply failures • Linac 2 vacuum leak • Repair of septa magnet in PS

  15. Operations • Despite all the problems, an overall successful year for physic’s at ISOLDE. • Thanks to the contributions of all the support groups involved • More support from other groups: • BE-CO, TE-MSC, EN-ICE, EN-MME, PH-ADO… …and all those boarding the HIE-ISOLDE project.

  16. Safety • Two issues that have triggered a change in the approach to safety at ISOLDE. • The Internal Safety Audit and their recommendations • The failure of the HRS Robot to correctly retrieve a used target x 2.

  17. Internal Safety Audit • An exercise recommended by the management for all installations at CERN • ISOLDE being the first after the LHC • A series of meetings between the appointed auditors and the various groups associated with the operation of ISOLDE • A report published with recommendations for different departments • The inter-departmental sharing of tasks between the DSOs of EN and BE with respect to ISOLDE remains to be formalized at the level of the Sector. • …shall finalise the inventory of hazards and document the control measures (procedures and systems)… • …that all interventions under their responsibility are carried out following the optimization principles stipulated in the Safety Code F. • ALARA: As Low As Reasonably Achievable and the adoption of the ALARA Committee.

  18. Robot Incidents • Three reports produced. • Presented at FOM (Facilities Operation Meeting), IEFC (Injectors and Experimental Facilities Committee). • Used as an example to endorse the adoption of the DIMR: Dossier D’Intervention en Milieu Radioactif • Relatively new procedure to the PS complex still under approval. • Combined with an ALARA committee • Different procedures according to radiation levels/contamination/expected absorbed dose of participants • Most interventions at ISOLDE are Level 3 (highest). • Timely. • No more “quick” interventions without completing the DIMR. • Knock on effects for operation.

  19. Shutdown Planning 2009/2010 • 2 major interventions projected for the shutdown 2009/2010. • Replacement of the HRS FE#3 by FE#6 • Including “Boris tube” insulators and cables • Motivation: FE#3 has gone beyond its expected lifetime in terms of absorbed radiation dose. Installation in controlled conditions. • Failure of HRS Frontend to decouple actual target as from last Wednesday. • Renovation of vacuum system controls • All vacuum sections of ISOLDE excluding REX • Motivation: frequent vacuum control breakdowns, aging and obsolete equipment. Benefit from support from the Vacuum Group.

  20. The New ISOLDE Frontends Frontends (1, 2), 3, 4 Frontends (5), 6, 7 Stefano Marzari & EN-STI-RBS team ISOLDE WORKSHOP

  21. Front End #6 ImprovementsSee presentations by S. Marzari and T. Giles in ISOLDE workshop Detachable front part Smaller volume Compressed air motors Improved optics Ceramic insulator Improved alignment system Linear potentiometers New controls

  22. Boris Tube Insulators The removal of the Front end provides a unique opportunity to replace the repairedinsulator (2007) . Implies a complete exchange of the cablingthrough the BT Salle HT Boris tube Séparateur HRS Faraday cage HRS

  23. Planning of FE exchange • Phase 1 - Removal of FE#3 • 13th – 15th January • Phase 2 - Removal of Boris tube cables and insulator exchange • 18th – 22nd January • Phase 3 - Cabling of BT and ground elements • 25th January – 12th February • Phase 4 - Installation of FE#6, alignment • 15th – 19th February • Phase 5 - Coupling, vacuum and electrical • 22nd – 24th February • Phase 6 - Tests, mechanical, vacuum, power • 3rd March -> • Key dates • Cold check out 5th April • Off-line run – 19th April • Protons to ISOLDE – 26th April • Warning: Planning subject to change according to progress on both FE installation and vacuum controls upgrade progress!!

  24. Vacuum • Complete renewal of ISOLDE vacuum controls • Collaboration between TE-VSC and EN-ICE • New plc’s, controllers and crates • New vacuum controls - PVSS • Major cabling overhaul • Work already started on unused beam-lines • Once started…no looking back! PID for ISOLDE Courtesy of G. Vandoni

  25. Vacuum • Main Controlled Equipments • 200 Valves • 120 Gauges • 50 Pumps • 110 Crates • New Cables (Installation EN/EL) • Tunnel HRS/GPS : 70 Cables • Hall : 155 Cables • CR&“Primaire RA” : 60 Cables Courtesy of S. Blanchard

  26. News from Support Groups • BE-OP • Employment of D. Voulot as from 1st January 2010. • PH-SME • Employment of technician J. Thiboud (2 years) for WITCH and REX • SC-RP • Supplementary RP technician for shutdown period. • EN-STI • Successful negotiation of 2 Fellows in collaboration with ESS, Lund. Target area upgrade and liquid metal loop project. • Approval of 3.5MCHF for target area upgrade project starting 2010. • Opening of post for a Safety Engineer within EN-STI-RBS • Technical student starting today (6 months) for safety file of ISOLDE. • Opening of post for Laser Physicist in EN-STI-LP • Increase in general consolidation to 250kCHF for 2010.

  27. Courtesy of Y. Kadi and M. Pasini

  28. HIE-ISOLDE Schedule • Important milestones for Energy Upgrade: • Start project Jan 1st 2010 • Cryogenics building ready Dec 2011 • Installation infrastructures completed Dec 2012 • Cryogenics installed and commissioned Jun 2013 • High energy beam line (5.5 MeV/u) installed by March 2013 • Full Linac (10 MeV/u) installed by Jan 2014 • Commissioning completed by June 2014 inline with L4 and PSB commissioning (Oct. 2013 to July 2014)

  29. Current Cost The current cost of HIE-ISOLDE 1 is 36 MCHF materials and 124 FTE (71 staff + 53 Fellows/Phd) This includes the beam quality improvement and part of the linac design study & prototyping costs (5 MCHF including FTE) that have already been spent, and necessary consolidation costs. Of the assured external funding (see below) 5 MCHF remains unspent

  30. R&D activity on HIE-LINAC • RF – Beam dynamics studies • High b cavity prototype • Copper substrate manufacturing • Chemical etching • Nb sputtering • RF sub-system prototypes • Tuner • Power coupler • SC solenoid prototype • Cryomodule design • In parallel preparation of a test stand for QWR at CERN Y. Kadi HIE-ISOLDE Proposal, IEFC, August 21, 2009

  31. Zone au rez de chaussélibre Cage de faraday

  32. High –beta cavity final welding and cleaning THPPO010 M. Pasini SRF09 Berlin, 20-25.09 2009

  33. SC solenoid prototype (Nb3-Sn technology) Mechanical drawings for the model are completed M. Pasini SRF09 Berlin, 20-25.09 2009

  34. Cryomodule design • Features: • Single vacuum cryostat • Side loading of the cold masses • Independent alignment of the cavities w.r.t. solenoid • Heat shield cooled by He cold gas M. Pasini SRF09 Berlin, 20-25.09 2009

  35. Summary (1/2) HIE ISOLDE R&D activity is in good health and ongoing: • Cavity prototype completed. Tests to be done @ TRIUMF before the end of the year • Cryomodule concept design completed, will start detailed design as soon as manpower is available • Preparation of test bench at CERN of QWR resonators (new test cryostat is planned to be ready by Feb/Mar 2010) • Complete Cavity configuration test is planned by the end of 2010. M. Pasini SRF09 Berlin, 20-25.09 2009

  36. Summary (2/2) • Fellow for RF Cavity Tests => launch fabrication of 5 series cavities (50% paid by SPL) • Fellow for Cryomodule detailed design due by mid-2010 • Fellow for radiation protection => validate layout • Prepare Resource-loaded Plan for CERN Management => release resources as early as possible (mid-2010/2011) • If construction starts by mid-2010, then installation and commissioning of the first 2 cryo-modules for 2013 M. Pasini SRF09 Berlin, 20-25.09 2009

  37. Research Training Themes Addressed by this ITN Proposal Y. Kadi HIE-ISOLDE Proposal, IEFC, August 21, 2009

  38. Thank you for your attention

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