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RHIC Status Update: First Week Insights on Luminosity and Machine Developments

In this first-week update, V. Ptitsyn discusses the recent status of the RHIC (Relativistic Heavy Ion Collider) including luminosity with 54 bunches and ongoing developments. Major improvements include reducing the collision vertex, ramping storage cavities to 400kV, and implementing a quad pumping technique for better longitudinal matching from AGS to RHIC. The meeting addresses key issues such as the scaling of collision rates with the number of bunches, as well as enhancing transverse and longitudinal emittance control. Updates on the PHENIX and STAR ZDC collision rates are also provided.

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RHIC Status Update: First Week Insights on Luminosity and Machine Developments

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  1. RHIC Status V.Ptitsyn

  2. First week: Luminosity 54 bunches 87(86) bunches 54 bunches 03/14/06 Time Meeting V.Ptitsyn

  3. First week: Polarization 03/14/06 Time Meeting V.Ptitsyn

  4. 03/14/06 Time Meeting V.Ptitsyn

  5. 03/14/06 Time Meeting V.Ptitsyn

  6. Recent machine developments • Main developments during the last week: • Reducing the collision vertex: • Ramping storage cavities to 400kV at the store (used in first part of the week) • Quad pumping technique: better longitudinal matching from AGS to RHIS. • Nonlinear IR corrections (Blue, sext. and skew-sext.) • Emittance and collision rate dependences. • Blue snake adjustments • Yellow transmission efficiency improvements on the ramp • Major present issues: • Achieve proper scaling of the collision rates with number of bunches. • Tighten transverse and longitudinal emittance control. • PHENIX and STAR ZDC collision rate difference 03/14/06 Time Meeting V.Ptitsyn

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