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Emanuel Karantzoulis, Alessandro Fabris , Sincrotrone Trieste, Trieste, Italy.

Emanuel Karantzoulis, Alessandro Fabris , Sincrotrone Trieste, Trieste, Italy. Status of Elettra. Acknowledgments: S. Bassanese, P. Borsi, A. Carniel, S. Krecic, M. Svandrlik, R. Visintini. Overview /Pre-injector/Booster/Storage ring/Conclusions. OUTLINE New injector Pre-injector

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Emanuel Karantzoulis, Alessandro Fabris , Sincrotrone Trieste, Trieste, Italy.

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  1. Emanuel Karantzoulis, Alessandro Fabris, Sincrotrone Trieste, Trieste, Italy. Status of Elettra Acknowledgments: S. Bassanese, P. Borsi, A. Carniel, S. Krecic, M. Svandrlik, R. Visintini

  2. 2 Overview /Pre-injector/Booster/Storage ring/Conclusions • OUTLINE • New injector • Pre-injector • Booster • Elettra performance and statistics • Conclusions

  3. 3 Overview /Pre-injector/Booster/Storage ring/Conclusions 2008 2007

  4. Overview /Pre-injector/Booster/Storage ring/Conclusions • NEW ELETTRA INJECTOR • GENERAL PROJECT ASSESMENT • Project timeframe: March 2005-March 2008. • Concluded on budget and on time. • 100 man-year of personnel matrixed to the project. • BOOSTER MILESTONES: • Building construction: September 2005 - July 2007 • Installations: April 2007 - August 2007. • Commissioning from September 2007. • First injection for users: March 3rd, 2008 as planned. 4

  5. Overview /Pre-injector/Booster/Storage ring/Conclusions • Pre-injector energy: 110 MeV maximum, 100 MeV operating • Operating improvements: • Pre-injector synchronous with Elettra RF master oscillator. • Safe operating conditions of pre-injector during storms: • power interruptions could damage the HV cabinet or klystron itself. • Interruption relay of HV modulator on UPS • Act on the thyratron trigger interlock time. • Work in progress ( to be completed in 2008): • Completion and test of spare modulator. • Construction of a spare gun. Buncher direct and reflected power vs. RF freq. Section direct and reflected power vs. RF freq. 5

  6. Overview /Pre-injector/Booster/Storage ring/Conclusions • Booster Operational Progress • Full energy injection at 2 GeV for users (March 3) with 3 HC tuned (ramping frequency: 1.5 Hz). • 2 GeV injection with IDs at user gaps (test). • Full energy injection at 2.4 GeV (April 13-machine shifts). • Major dipole pwr converter fault (April 16). • Restored 2 GeV injection from August 29 (ramping frequency: 2.4 Hz). • 2.4 GeV full energy injection (November 25). 6

  7. Overview /Pre-injector/Booster/Storage ring/Conclusions • Power converters status • Dipole: 2.4 GeV @ 3 Hz will be tested in this run. • Quadrupoles: 2.5 GeV @ 3 Hz reached. • Sextupoles: delivered. To be tested on the load, we continue to operate with the spare corrector supplies. • Refurbishing activities (possible only during Elettra shutdowns): • Improved layout and cards to lower interference from EM noise, improve grounding, eliminate communication errors. • New IGBT trigger cards embedding low level protection to reduce number of failures and improve functionality. • Work in progress: ripple and stability. At present X10 above At present X3 above 7

  8. Overview /Pre-injector/Booster/Storage ring/Conclusions (5.39,3.42) 8

  9. Overview /Pre-injector/Booster/Storage ring/Conclusions • Maximum injection efficiency > 95% 1.0 Hz Ratio 2.18 so 1.4/2.18=0.642 i.e ~100 % efficiency • Booster max current above design value (5 mA/shot) 1.5 Hz Again efficiency >95% 9

  10. Overview /Pre-injector/Booster/Storage ring/Conclusions Impact on Elettra operation 0.75 or 0.9 GeV (accelerator physics time) for SR-FEL and SISSI CIR 10

  11. Overview /Pre-injector/Booster/Storage ring/Conclusions • RF UPGRADE • One 150 kW plant (2 x 80 kW IOTs) • Upgraded one of the two transmitter with a new tube (TH793-1 from THALES) and circuit type assembly in October 08. • Up to now IOTs’ lifetime is not comparable with klystrons’. 11

  12. Overview /Pre-injector/Booster/Storage ring/Conclusions Up to date: 3144 scheduled hours of user operation out of a total of 4032 (77.9%) • Up to date: 3144 scheduled hours of user operation out of a total of 4032 (77.9%) • Uptime: 95.3 excluding storms, 91.9 % including storms, 322 h 12

  13. Overview /Pre-injector/Booster/Storage ring/Conclusions • PRE-INJECTOR: performs quite well, working to improve. • BOOSTER • PS are the major source of problems. • Next steps: • Bring PS’s in tolerances (and also any other system if necessary). • Complete instrumentation. • Increase stability and reliability. • Reach and establish operation at 3 Hz and 2.4 GeV. • STORAGE RING • Elettra is already showing the beneficial signs of the full energy injection. • Next steps: • Reduce refill times to ~ 10 minutes (reduce ID gaps at injection, keep GOF on during refills). • Keep current above 200 mA (2 refills/day). • Dedicate more machine shift for studies to implement top-up. 13

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