TIME Meeting, M. Minty, January 18, 2011

Instrumentation SystemsRHIC RUN-11 Startup

ramp development with simultaneous orbit, tune, and coupling feedback new timing setup procedure (defer)

new global orbit feedback (defer)

Ramp Development, RHIC RUN-11

leading cause of failure:poor orbit control

post-shutdown commissioning:

RUN-9 : 13 ramps until blue/yellow at 250 GeV RUN-11: 4 ramps until blue/yellow at 250 GeV

post mortem, RUN-9:

Ramp Development, RHIC RUN-11tune / coupling feedback - Y. Luo, A. Marusic, K. Mernick, M. Minty, M. Wilinski, + operations

RUN-8 RUN-9 RUN-11

TU

NES

CO

UPLI

NG

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history: proof-of-principle in RUN-6 (P. Cameron, Y. Luo, R. Jones et al) considerable modifications just before and during RUN-9 operational in RUN-10

RUN-9 RUN-11 (blue)

Ramp Development, RHIC RUN-11orbit feedback – A. Marusic, M. Minty, V. Ptitsyn, G. Robert-Demolaize

ORBITS measured just after attaining first ramp to 250 GeV:

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hori

zonta

lvert

ical

history: proof-of-principle in RUN-10 BPM polarity reversal, early RUN-10

RUN-11 (yellow)

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