Proton Improvement Plan Bob Zwaska January 7, 2013 All-Experimenters Meeting.

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Presentation transcript:

Proton Improvement Plan Bob Zwaska January 7, 2013 All-Experimenters Meeting

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 2 Summary Preparing for beam  Most installations for this shutdown are complete: RFQ Linac Vacuum / Motor Control Center Booster Absorber Booster Solid State Booster Vacuum & Water Much work to go:  Linac & Booster RF systems  Loss minimization

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 3 New RFQ Installed

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 4 RFQ Status RFQ is Installed and commissioned  November mA into Linac Tank 1 – goal is 40 Used for treating patients since Dec. 11  28 mA at Tank 3 Transverse emittances are 2x smaller than previously with Cockcroft-Waltons Tuning is ongoing  Possibility of beam exiting RFQ at large angle leading to losses Correctors will be added

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 5 Linac Status Linac vacuum and Motor Control Center upgrades performed over shutdown 66 MeV beam has been delivered for NTF patient treatment 400 MeV start up initiated the week of December 17  First beam to the dump Dec.18th Commissioning continues Efficiency still lower than expected at high energies (~ 10% lower):  Ongoing problems with LRF5 which has been running at 7% lower gradient. Significant impact on poor efficiency and high losses observed.  Phase matching is not totally optimized yet. It will help when HEP beam resumes by the end of this month  Problems with instrumentation (unprecedented behavior of the HE motor controller of the wire scanners). Wires are unidirectional. They seem not to be retrieving to the opposite position once inserted. Investigation will resume after the holiday break.  Nevertheless, beam was observed at the dump area. More work to cleaning accelerate and dump the beam to the absorber continues.

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 6 Booster Solid State Upgrade Will be completed during shutdown Major benefits to reliability and the cost of operation To Be Done Nearly Done Prototype Upgraded

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 7 Booster RF Cavity Refurbishment RF cavity and tuner refurbishment is proceeding and will continue while running 4/19 Cavities refurbished To Be Done Removed Being Refurb. Refurbished

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 8 Spare Cavity Ferrite Testing Cavity Modeling Refurbished Solid State Cavity Tuner Rebuild Failed Tuner Connection Booster RF Repaired Tuner Connection

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 9 Booster Upgrades Major LCW replumbing and vacuum work also completed New notcher and absorber installed  Will create cleaner notches in the beam, and direct the notched beam into a controlled dump location

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 10 Booster Startup Booster work is wrapping up this week Startup will occur towards the end of next week New notch absorber and RF will be commissioned Aperture alignment and potential magnet moves will occur Beam studies for optics and cogging will continue Will wait for MI & RR for high-throughput startup  In the meantime, we will test cavities for high-pulse rate

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 11 Long-Term Items Linac RF Systems Modernization  High cost of upkeep  High-risk for failure in both modulator and power amplifier  Have developed an alternative klystron amplifier that solves both the above problems Ready to build a prototype! – addressing finance issues Booster RF Cavities  Need to be refurbished to operate at higher rates  Have now refurbished four cavities ( /19) to operate at 15 Hz Yet to be proven with beam As of a year ago, it was unclear whether cavities could ever run at 15 Hz  Need at least three additional, new stations for RF control to limit losses Provides a consistent accelerating voltage  More cavities may be needed, depending on results of refurbishment New cavities offer the possible of reduced losses and improved performance  Refurbishing continues and design work is underway for additional cavities.

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 12 Summary Proton Source ready for startup  Numerous PIP upgrades during the shutdown  There was additional non-PIP work (not covered here) Should experience immediate operational improvements from:  RFQ  Linac and Booster utilities  Solid-state upgrade  Notch Absorber  Four refurbished cavities Work will continue  RF systems are the major focus  Several activities to decrease losses / increase intensity  More utility / reliability work is pending

Jan. 7, 2013 Bob Zwaska All-Experimenters Meeting 13 Proton Improvement Plan Bob Zwaska January 7, 2013 All-Experimenters Meeting