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Collimation optimizations. Yuri setup 9 collimators for PCAP; we still use these collimators but their apertures are significantly optimized here. We add collimators: 1 @ PCAP, 1 @ PPATEL and 3 @ LTR. It turns out that the primary-beam power loss in magnets and drifts smaller than 100 W/m.

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## Collimation optimizations

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**Collimation optimizations**• Yuri setup 9 collimators for PCAP; we still use these collimators but their apertures are significantly optimized here. • We add collimators: 1 @ PCAP, 1 @ PPATEL and 3 @ LTR. • It turns out that the primary-beam power loss in magnets and drifts smaller than 100 W/m. • And only loose ~1.7% of capture efficiency with installation of these collimators. • Start initial distribution with shielded target and quarter wave transformation.**Capture efficiency**• W/o collimation system: the capture efficiency from the target to DR is: 17.1% • W/ the optimized collimation system: the capture efficiency from the target to DR is: 15.4%. • These collimators did not collimate wanted particles but reduce power loss in N.C. magnets, N.C. RF structures to 100 W/m.**6-D Phase spaces at the end**X’ Y’ x y Captured in DR Beyond trans. acceptance Beyond longi. acceptance t**Power loss and capture efficiency(Assure 3E10 captured at**DR)

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