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Proton Source Status Update: Progress and Challenges in NuMI and MiniBooNE Operations

The latest update on the Proton Source reveals that the NuMI project is progressing ahead of schedule regarding per cycle intensity, yet some issues persist, such as problems with pbar cooling and MI losses during slip stacking cycles. The average cycle time currently is about 3 seconds, and efforts are being made to lock the cycle criteria. Although total protons are slightly behind, both NuMI and MiniBooNE remain on track. Upcoming projects include ORBUMP and Dump relocation, with shutdown scheduled for Tevatron by 10/31. Major upgrades are planned for the Proton Source system, showing promise for future operations.

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Proton Source Status Update: Progress and Challenges in NuMI and MiniBooNE Operations

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  1. Status of the Proton Source Eric Prebys

  2. General Status • NuMI moving along • Ahead of schedule on per cycle intensity (~2E13) • Have not yet locked complex to 2 second cycle • Problems with pbar cooling • Problems with MI losses on slip stacked cycle • Average cycle time ~3 seconds • Working on criteria for locking cycle • ~more or less on schedule for total NuMI beam • Booster has calmed down a bit • Rash of hot weather failures seems so have peaked • Slip stacking “response team” work less disruptive • More focus on reducing total losses and increasing total intensity. • Reduced cycle rate means less protons to pBar • NuMI and MiniBooNE can be more or less on schedule even though total protons are a bit behind.

  3. Total Hourly Proton Rate “Summertime Blues” + focus on stacking issues

  4. NuMI Progress

  5. Integrated Delivery (MiniBooNE)

  6. 2005 Shutdown • Major Projects: • ORBUMP + 400 MeV Line (F. Garcia): • Preparation schedule in OK shape • Need 28 work days + ~5 days cool down • Dump relocation (B. Pellico): • Preparation in good shape • ~25 work days (no cooldown needed) • Shutdown schedule • Tevatron Scheduled to turn off 10/31 • Driven by D0 Silicon Layer 0 upgrade • 13 weeks scheduled • Options for Injector complex (Linac+Booster+MI): • Remain up for ~4 weeks to do stacking and eCool studies: • NuMI and MiniBooNE could run • Pushes Booster work into Christmas (figure 2 additional weeks) • Would push to turn off MB and NuMI 1wk before • Shut down promptly on 10/31: • Defer studies until end • Complete work just before Christmas • Consider shutting down or reducing NuMI and MB ~1 week beforehand • Still possible we might bag the whole thing until the spring • Hopefully, things will firm up at the next Run II PMG (7/20) Favored by division

  7. Longer Term (Proton Plan Status) • Internal review next week • New design handbook • New cost and schedule • Major changes • Full circle on Main Injector RF • Existing system can go to ~5.9E13 protons • ~Enough for slip stacked pBar and NuMI (2+9) operation • Don’t need complete dual RF upgrade • Good news for MiniBooNE: This frees up money and manpower for Proton Source projects: • Full blown Booster corrector upgrade • Linac LLRF upgrade • Major Booster RF modulator refurbishment • Bad news for MiniBooNE: • Will likely start slip stacking to NuMI some time on 2006, rather than 2007

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