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Recent Antiproton Source Operations

This report summarizes recent antiproton source operations, achievements, and future plans for improving the accelerator system at Fermilab. Key highlights include record beam currents, progress in stacked antiproton production, and ongoing studies for system enhancement.

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Recent Antiproton Source Operations

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  1. Recent Antiproton Source Operations Keith Gollwitzer Antiproton Source Department Accelerator Division Fermilab 5 May 2008

  2. 10mm-2 2220V 2400V 10mm-3 2600V Steel 1830V Stack Rate (mA/hr) Stack Size (mA) 1/1/2008 2/1 3/1 4/1 5/1

  3. 10mm-2 2220V 2400V 10mm-3 2600V Steel 1830V Stack Rate (mA/hr) Stack Size (mA) 1/1/2008 2/1 3/1 4/1 5/1 Record Accumulator Beam Current 313.58mA February 21

  4. 10mm-2 2220V 2400V 10mm-3 2600V Steel 1830V Stack Rate (mA/hr) Stack Size (mA) 1/1/2008 2/1 3/1 4/1 5/1 Jan 29 25.19mA May 5 26.09mA May 3 25.95mA Jan 8 24.69mA Apr 6 25.32mA Apr 8 25.90mA Mar 26 25.29mA Progression of Stacked Antiprotons in 1 hour Record

  5. 10mm-5 Lens-transformer assembly is complete and ready for testing 10mm-3 Lens-transformer assembly has a new stripline and is the spare Stripline failure early March

  6. Studies and Tuning • Debuncher Momentum Cooling Systems • Gain Ramps – determined no affect for 2.2sec cycle • Double Notch Filter • Not achieving desired notch depth • Thinking about new notch filter equalizer • Individual band equalizers - designed first; await chance to install • Accumulator Stacktail System • Delta Kicker to compensate for transverse heating by system • Some quick gains seen • “Centering” of 2 kicker tanks achieved the same effect; need to do all 10 • May still get benefit with new equalizers • Accumulator Transverse Cooling Systems • Individual band equalizers – first should be ready soon • AP2/Debuncher Optics • More circulating beam by moving Debuncher tunes • Decreases Debuncher cooling effectiveness – reverted to design tunes • More beam into Debuncher with some AP2 optics changes - ongoing • Mechanics of transfers out of Accumulator • Rapid transfers covered last All Experimenters’ Meeting

  7. May 4 Jan 1 0 Stack rate (mA/hr) 24 32 0 Stack size (mA) 80

  8. Summary • The Antiproton Source is running well • Outlook is promising • Recent Records • 313.58mA in Accumulator • 26.09mA in 1 hour • 3065.6mA in 1 week (Mon-Mon 00:00)

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