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Proton Source Startup

Proton Source Startup. Eric Prebys, Proton Source Dept. Head. Proton Source Shutdown Projects. Linac: New Lambertson: DONE Major LCW upgrade: DONE Modified “notchable” ion source in H-: DONE Booster: New collimator system: DONE Four new MI-8 (EDWA) magnets: DONE

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Proton Source Startup

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  1. Proton Source Startup Eric Prebys, Proton Source Dept. Head

  2. Proton Source Shutdown Projects • Linac: • New Lambertson: DONE • Major LCW upgrade: DONE • Modified “notchable” ion source in H-: DONE • Booster: • New collimator system: DONE • Four new MI-8 (EDWA) magnets: DONE • Rearrangement of Long 3 extraction region to reduce “dogleg problem”: DONE except for final alignment • New power supply on MP01: DONE • New Mode 16 damping system: DONE • “Beam whacker” beam profile monitor: DONE • Swap planes of ionization profile monitor: DONE • Replace all hoses on 96 magnet water “candy canes” (unplanned):DONE. • Booster vertical network: DONE, being processed. • Complete new vacuum redout system: Being completed • Install protoype RF cavities: deferred • Vertical magnet moves: deferred Booster startup plan - Prebys

  3. Startup Plan (pre-Nov 17) • Week of 10/27 • Bring Booster up, verify basic operation. • Zero trims and re-measure 3-mults with new lattice. • Studies evenings. • 11/1,11/2 • Test extraction to MiniBooNE • Week of 11/3 -> End of shutdown: • Optimize new lattice. • Move radial feedback to Long 6 (for collimators). • Limited collimator tests. • Begin to establish tight limits on individual loss locations. • Studies evenings • Extract on weekends if requested by MI. • 11/17: Complex back up. Proton source “better” than before Booster startup plan - Prebys

  4. Booster Collimator System • Problem: • One of our existing safety systems (B:BPL5MA) calculates beam power loss by counting lost protons. • This will not work with the collimation system. • Must tighten up our limits on the individual loss monitors. Basic Idea… A scraping foil deflects the orbit of halo particles… …and they are absorbed by thick collimators in the next periods. Booster startup plan - Prebys

  5. Post-shutdown commissioning • Lattice optimization: 2 weeks – 1 month of “ordinary tuning”: • Begin collimator commissioning (1-2 months semi-parasitic): • Bypass B:BPL5MA limit. • Run secondaries in until the begin to attenuate the beam, then back off slightly. • Adjust primary positions to minimize (uncontrolled loss)/(transported beam) • Re-optimize orbit for each collimator setting. • Measure loss patterns and establish tight limits. • Integrate collimators into normal operation. Booster startup plan - Prebys

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