Recent Antiproton Source Operations Keith Gollwitzer Antiproton Source

10 mm-2 2220 V 2400 V 10 mm-3 2600 V Stack Rate (m. A/hr)

Progression of Stacked Antiprotons in 1 hour Record 2/1 3/1 4/1 5/1 May 5

10 mm-5 Lens-transformer assembly is complete and ready for testing 10 mm-3 Lens-transformer assembly

Studies and Tuning • Debuncher Momentum Cooling Systems – Gain Ramps – determined no

32 24 May 4 0 Stack rate (m. A/hr) Jan 1 0 Stack size

Summary • The Antiproton Source is running well • Outlook is promising • Recent

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

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

10 mm-2 2220 V 2400 V 10 mm-3 2600 V Stack Rate (m. A/hr) Steel 1830 V Record Accumulator Beam Current 313. 58 m. A February 21 Stack Size (m. A) 1/1/2008 2/1 3/1 4/1 5/1

Progression of Stacked Antiprotons in 1 hour Record 2/1 3/1 4/1 5/1 May 5 26. 09 m. A May 3 25. 95 m. A Apr 8 25. 90 m. A Apr 6 25. 32 m. A Mar 26 25. 29 m. A Stack Size (m. A) 1/1/2008 Jan 29 25. 19 m. A Jan 8 24. 69 m. A Stack Rate (m. A/hr) 10 mm-3 2600 V 10 mm-2 2220 V 2400 V Steel 1830 V

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

Studies and Tuning • Debuncher Momentum Cooling Systems – Gain Ramps – determined no affect for 2. 2 sec 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 • AP 2/Debuncher Optics – More circulating beam by moving Debuncher tunes • Decreases Debuncher cooling effectiveness – reverted to design tunes – More beam into Debuncher with some AP 2 optics changes - ongoing • Mechanics of transfers out of Accumulator – Rapid transfers covered last All Experimenters’ Meeting

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

Summary • The Antiproton Source is running well • Outlook is promising • Recent Records – 313. 58 m. A in Accumulator – 26. 09 m. A in 1 hour – 3065. 6 m. A in 1 week (Mon-Mon 00: 00)