Instrumentation brain-storming

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Presentation transcript:

Instrumentation brain-storming R. De Maria WP2 meeting

IP orbit feedback Today the machine is sufficiently reproducible not to need an orbit feedback at the IP. For HL-LHC it might not be case for the lowest value of β* possible. Xmeasured (t)=Xtrue(t)+Oerror(t, Ib, …) Std(Xerror(t, Ib, …)) <2 µm when sampled at 10 Hz for the 36000 consecutive samples (10 hours) 0.5 1011<Ib<2.2 1011, |Xtrue|< 15 mm samples should be delivered to the feedback DSP within 20 ms delay

AC Dipole optics measurement Today amplitude data from AC dipole measurements is not sufficiently accurate to measure β-function in the Q1-Q4 areas as compared with K-modulation. Amplitude data would allow much faster optics measurements if available. DFT(Xmeasured (t), ω)=Serror(ω,Ib,<X>…) DFT(Xtrue(t), ω) |Serror(ω,Ib, <X>,…)-1|<0.02 and phase( Serror(ω,Ib, <X>,…) )<0.0001 16384 sample turn by turn samples for: 0.8 1010<Ib<1.2 1010, |Xtrue|< 15 m 0.1<ω<0.4 Few single bunches