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PHOBOS Run 5 Progress

PHOBOS Run 5 Progress. Peter Steinberg Brookhaven National Laboratory February 23, 2005. Last 2 Weeks. Vacuum breakdowns started ~Feb 10 Lost about 20% of data in last 2 weeks Estimate “good” data by < 300 m rad/sec. Radiation Levels. -Z. Run Statistics Last Week. End 200. End 62.4.

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PHOBOS Run 5 Progress

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  1. PHOBOSRun 5 Progress Peter SteinbergBrookhaven National Laboratory February 23, 2005

  2. Last 2 Weeks • Vacuum breakdowns started ~Feb 10 • Lost about 20% of data in last 2 weeks • Estimate “good” data by < 300mrad/sec

  3. Radiation Levels -Z

  4. Run Statistics Last Week End200 End62.4 Run ’04 AuAuTotal Fewer polarity flips at request of CAD Smaller CuCu system requires ~3x more (720M events) for equivalent no. of tracks

  5. New Run Statistics Plot End200 End62.4 400M event“minimum” Run ’04 AuAuTotal

  6. Projections & Polarities End200 End62.4 400M event“goal” 1 week Run ’04 AuAuTotal ~7 days ~5 days ~7 days

  7. Special Requests for Running • Schedule for polarity flips • Tomorrow morning (B) & March 2-3 (A) • Strong request for short field-off run • One ½ store (2hrs) at zero field (1-2M events) sometime next week • Can we do this in the 2nd half of a good store?

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