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APEX Schedule Update: March 22, 2006 - Store and Resonance Correction Analysis

On March 22, 2006, the APEX team conducted critical store and injection processes, focusing on 2/3 resonance corrections and sextupole polarity checks. Initial results indicated a loss sensitivity at BBQ locations and confirmed technical issues with the horizontal AC dipole, affecting performance. A detailed examination of beam parameters revealed a significant vertical beta* discrepancy between IP8 and IP6. The APEX schedule planned follow-up sessions for March 28-29, 2006, with discussions on maintenance and studies related to intensity and polarization.

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APEX Schedule Update: March 22, 2006 - Store and Resonance Correction Analysis

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  1. APEX Schedule March 22 2006 Store 6x6 Store injection injection 2/3 resonance correction Luo + team Sextupole Polarity Check Luo Satogata 10 Hz orbit Feedback Montag Michnoff Schultheiss DA with AC dipole Bai Pilat Bengtsson Ptitsyn, Luo Optics Bai Michnoff Back 2 Physics Stoch. Cooling kicker Brennan Blaskiewicz BBQ sensitivity Cameron 8am 10am 11am 12pm 3pm 5pm 7pm 8pm Kicker aligned now Low intensity bunch demonstrated Confirmed sensitivity to losses at BBQ location Feed-back not ready (DSP) Development continues

  2. horizontal ac dipole wasn’t firing • due to technical glitches • vertically, the maximum coherent • we Got without lossing beam is 0.2mm • in the middle of arcs and 1mm at Q3 • The preliminary measurement shows • the vertical beta* at IP8 is about • 30% larger than IP6 Mei Bai

  3. Sextupole polarity Luo, Satogata, Cameron

  4. 2/3 correction at injection Detailed plan for next time formulated Excitation with AC dipole

  5. APEX Schedule March 28-29 2006 End of store or 6 x 6 Store 6x6 injection 2/3 resonance correction Bengtsson Luo Calaga Satogata Bai Sextupole Polarity Check Luo Satogata DA with AC dipole Bai Pilat Bengtsson Skew chromaticity Tepikian Long range Beam beam Fischer BBQ sensitivity Cameron Optics Bai Michnoff BBQ sensitivity Cameron 8pm 9pm 12am 1am 2am 3am 5am 8am • Scheduled APEX canceled this week • Studies after maintenance if intensity/polarization too low • for physics • Make-up some hours for APEX next week

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