Emanuel Karantzoulis, Alessandro Fabris,

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Status of Elettra

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

Acknowledgments S. Bassanese, P. Borsi, A.
Carniel, S. Krecic, M. Svandrlik, R. Visintini
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Overview /Pre-injector/Booster/Storage
ring/Conclusions

• OUTLINE
• New injector
• Pre-injector
• Booster
• Elettra performance and statistics
• Conclusions

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

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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.
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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).

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Overview /Pre-injector/Booster/Storage
ring/Conclusions

• Power converters status
• Dipole 2.4 GeV _at_ 3 Hz will be tested in this
  run.
• Quadrupoles 2.5 GeV _at_ 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
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Overview /Pre-injector/Booster/Storage
ring/Conclusions
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Overview /Pre-injector/Booster/Storage
ring/Conclusions

• Maximum injection efficiency gt 95

1.0 Hz
Ratio 2.18 so 1.4/2.180.642 i.e 100
efficiency

• Booster max current above design value (5
  mA/shot)

1.5 Hz
Again efficiency gt95
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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
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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.

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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
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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 PSs 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.

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