Dear Peter, I was considering the statement that you made that we could obtain 38 kHz effective rate in an ideal world. If our kicker were perfectly effective and instantly deflected the beam whenever a muon passed through it, then this would be true. But, as you have shown, it takes time for the signal to reach the kicker and it doesn't kick perfectly, so we lose some events due to pileup. I have calculated the "ideal" rate we would observe in the case that no sneakers exist, as well as the case that we actually have, where the full beam is unsuppressed for ~550 ns and then we have some extinction factor of 100. I considered the possibilities that a muon is vetoed because a sneaker comes in on the right (later times), or because the muon came in too close to a sneaker during the previous fill. I have not taken into account the increase in pileup veto due to the muSCA/muSClo signals. In the attachment, I have the ideal NPP rate in red, and the actual PP observed rate in blue, as a function of incident unkicked rate. For our current running conditions we havea a kick fraction of 0.63 and a rate of 25 kHz, implying our beam is about 70 kHz incident. This comes out to some low 20s of kHz which is close to the 0.8 PP efficiency times the 25 kHz scaler 9. Ultimately we still have a lot of room to imprve if we could increase the beam rate by a factor of 2, but after that the returns are diminishing for our physical setup, and the maximum PP rate is only about 25 kHz. Mostly I was just interested in seeing the maximum theoretical rate with our setup. Best Regards, Brendan
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rates.png
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