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Studies Review: 08/25/03 – 09/08/03

Detailed summary of machine studies, procedures, updates, and results at FNAL Stores from August 25th to September 8th, 2003. Includes TeV studies, new ramp helix, optics commissioning, maintenance work, and more.

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Studies Review: 08/25/03 – 09/08/03

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  1. Machine Studies Weeks Studies Review: 08/25/03 – 09/08/03 Doug Moehs – FNAL

  2. Stores Summary Doug Moehs (Phil. 4:6-9)

  3. Brief Study Summary • Focused on machine studies for the last 2 weeks • Semiparasitic studies • whenever stacking for a store • 10% of timeline • Dedicated study periods separated by aprox. 16 hours. Period 1: 8-12 hours of Pbar and/or MI studies Period 2: 8-12 hours of TeV studies • 2 stores between study periods • Stack and store through the weekends • In addition to studies, over the last 2 weeks: • Approximately 140 store hours over the last two weeks • Integrated just under 10 pb-1 Doug Moehs (Phil. 4:6-9)

  4. TeV Studies and Changes • Studies • Losses during the squeeze and at CDF • Commissioned new high energy ramp helix • Recommissioned transverse dampers • Commissioned new optics at 150 GeV • Standard maintenance studies included: • Two 36x4 stores to find a cogging problem • Work on the TEL • 16 Hour accesses to optimize the Fall shutdown • Cold lift measurements • As found measurements Doug Moehs (Phil. 4:6-9)

  5. Machine Updates • Main Injector • Commissioned 2.5 MHz transfers along with Antiproton Source • Measure current optics of MI-8 line • SY120 • 8 hour shutdown: Installed and tested new septa motors • Preparation for “slow” resonant extraction • Fast extraction: physics run • Slip stacking • NuMI multi-batch acceleration: • Achieved intensities up to 2.3E13 with 5% loss • 2.5MHz acceleration • MI transverse dampers Doug Moehs (Phil. 4:6-9)

  6. Machine Updates • Antiproton Source • Debuncher studies • Reverse proton studies • Complete set of admittance measurements • Proton emittance growth • Accumulator dispersion • AP2 BPMs • Accumulator tunes across the aperture • measurements automated Doug Moehs (Phil. 4:6-9)

  7. Automated Tune Measurement Doug Moehs (Phil. 4:6-9)

  8. Machine Updates • Recycler • 8 hour shutdown: Installed final 2 houses of new BPMs • Commissioning new BPM system • Commissioning Ion Clearing Current Monitors • Old BPMs used in place of ion gauges • Proton Source • Cogging studies for NuMI-multibatch injection • Turned off MiniBooNE at 08:00 on September 2 • Activation in the Linac reduced by a Factor of 2 Doug Moehs (Phil. 4:6-9)

  9. Linac Activation Reduction Associated with Turning off MiniBooNE Ratio of one foot measurements on 9/7/03 and 9/2/03 The last bar is an average of all data points Slide provided by Elliott McCrory Doug Moehs (Phil. 4:6-9)

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