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Weeks in Review: 05/19/03 –06/02/03

Stores and Operations Summary Standard Plots. Weeks in Review: 05/19/03 –06/02/03. Keith Gollwitzer – FNAL. Stores Summary. TeV Summary. Fixes T:HE17 Trips that caused quenches Bad cable connector inside of relay rack Trim power supplies LLRF filter to remove 100Hz

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Weeks in Review: 05/19/03 –06/02/03

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  1. Stores and Operations Summary Standard Plots Weeks in Review: 05/19/03 –06/02/03 Keith Gollwitzer – FNAL

  2. Stores Summary K. Gollwitzer - FNAL

  3. TeV Summary • Fixes • T:HE17 Trips that caused quenches • Bad cable connector inside of relay rack • Trim power supplies • LLRF filter to remove 100Hz • Small tune changes at 980GeV stop pbars from being coherent • Studies • 2 studies looking at injection line matching and vertical dispersion • Lattice measurements at flat-top & low beta • Tunes as a function of octuple and helix separation • Confirmed that F0 lambertson is now largest impedance • Much checkout of ramps (coupling, chromaticity…) • BPM characterization K. Gollwitzer - FNAL

  4. Moving F0 Lambertson Coherent Beam Current Lambertson Position K. Gollwitzer - FNAL

  5. Main Injector & Recycler • MI studies • Slip Stacking • 2.5MHz acceleration • NUMI multibatch • Recycler Accesses • RGA scans to confirm locality of contamination • Replacement of contaminated vacuum gate valve • Removal of leaking stochastic cooling tank • Recycler studies • Vacuum as function of beam intensity • RF manipulation and longitudinal emittance growth • General recovery from access work K. Gollwitzer - FNAL

  6. NUMI Multibatch 84 Booster Bunches 9 Beam Turns 6 Booster Batches Intensity > 2E13 K. Gollwitzer - FNAL

  7. Antiproton Source • Problems • 2 Lithium Lens replacements • Most pulses (20 months of service); transformer went bad • Installation error led to early demise of lens • Lens water system problems (conductivity cell & valve) • Bad AP3 shunt caused bad transfers for 2 shots • Water pump broke  lost stack • Broke a dipole and 2 quad shunts • Studies • Tunes across Accumulator aperture • Measurement of the Accumulator momentum aperture • Quad BPM study • Extraction lattice measurements • Fast stacking K. Gollwitzer - FNAL

  8. Attempt at Fast Stacking Pbar production decreases Stack rate remains the same Stack cycle from 2.4 to 2.0 sec Goal is to increase stack rate by shortening cycle time and decreasing ARF1 bucket area. The tradeoff: leaving more pbars on injection orbit K. Gollwitzer - FNAL

  9. Proton Source & SY120 • Proton Source • LRF Tubes • One of BNL spares delivered to FNAL • LRF5 Rested when possible; has been replaced today • Back to no spares • Concern with hot areas of Booster • SY120 • Three studies periods • Extract beam on $21 but no evidence of proton beam in P3 line • See beam spray on P3 multiwires • Magnet polarities checked during access • Steering/alignment is suspect K. Gollwitzer - FNAL

  10. Narrow in P1 and P2; wide beam in P3 P3 wires P1 and P2 wires K. Gollwitzer - FNAL

  11. Study week + shutdown week = average week? Shutdown Investigation of poor pbar efficiency Quench – Beginning of ramp Studies K. Gollwitzer - FNAL

  12. Integrated Luminosity & Goals Goal curves were defined in Oct 02 K. Gollwitzer - FNAL

  13. Brief Summary • Two weeks • Short accesses • Study Shifts • Some running and a holiday weekend • Shutdown • Recovery • Goal for this week • Stack and Store K. Gollwitzer - FNAL

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