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Spill Options

Spill Options. Current operation is 4 second slow spill once per minute (6 sec. total, 12 hours/day or 5%). We have in the past changed from 4 sec to 1 sec, but done it manually requiring a handful of experts, Taking one or more shifts. Now 4 sec or 1 sec Slow spill length controlled by

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Spill Options

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  1. Spill Options Current operation is 4 second slow spill once per minute (6 sec. total, 12 hours/day or 5%) We have in the past changed from 4 sec to 1 sec, but done it manually requiring a handful of experts, Taking one or more shifts • Now 4 sec or 1 sec Slow spill length controlled by • automated-Operations, event type, and few parameters (Denton Morris, Dave Capista, Wally Kissel, Paul Allcorn, Peter Prieto, Charlie Briegel, Chuck Brown) • New operartional mode: “Pings” 5ms duration fast spill • per ping, 4 pings per pulse

  2. Changes to Main Injector QXR for Pings • Added an external 150V 15A Power supply. • 2nd Power Supply provides current to QXR Regulator so it can fast extract. • Controls added hardware generating Ping events ($33) through TCLK. Up to 8 events per spill. • MI-30 test showing QXR can extract beam during1 sec cycle and a 4 sec cycle . Pings can be generated during either one.

  3. QXR and Harmonic Quads extracting MI Beam during Slow Spill Only 4 second spill

  4. Mixed Mode: QXR During Slow Spill and Pings The ILC test mode would operate in 1 sec pulse for a total of 4 pings per pulse

  5. MI Beam during Pings 2 pings in 0.5 sec, ILC mode: 1 ping every 0.2 seconds (5Hz)

  6. 5 Millisecond Ping at end of Mtest Line

  7. 3 Millisecond Ping at end of Mtest Line

  8. 1 Millisecond Ping at end Mtest Line

  9. Pings to MT6

  10. Issue: Possibility of TeV Quench due to Pings TeV Abort threshold is .4 R/S Pings cause losses in the TeV in order of .025 R/S at F49 and .05 R/S at F11

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