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RHIC Status. V.Ptitsyn. First week: Luminosity. 54 bunches. 87(86) bunches. 54 bunches. First week: Polarization. Recent machine developments. Main developments during the last week: Reducing the collision vertex:
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RHIC Status V.Ptitsyn
First week: Luminosity 54 bunches 87(86) bunches 54 bunches 03/14/06 Time Meeting V.Ptitsyn
First week: Polarization 03/14/06 Time Meeting V.Ptitsyn
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