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This document outlines the integrated design and functionality of the 2001 NLC (Next Linear Collider) Final Focus and Collimation systems. It discusses the implementation of tail folding octupoles for effective energy collimation and adjustments in beam dynamics. Tracking results, various configurations, and the effects of synchrotron radiation are evaluated, providing insights into the system’s performance metrics under different conditions. The document also highlights new techniques for beam tail collimation, improving beam stability and precision.
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2001 Collimation System & FF integrated design (NLC) Octupole Doublets FD A Final Focus Final Focuscollimation IP A Energy collimation FD Betatroncollimation A IP FD IP FD IP S SA SA SA A New scheme of the Collimation Section and Final Focus with ODs All the tracking results shown in the previous slides include the CS
2001 NLC BDS Tail folding octupoles are ON. 16sxx51sy Tail folding octupoles are OFF. 11sxx46sy
RoadMap Report BDS (Kuroda) NLC JLC Energy collimation
RoadMap Report BDS (Kuroda) Tail folding octupoles are ON. 16sxx51sy Tail folding octupoles are OFF. 11sxx46sy
Synchrotron Radiation qx qy RM BDS Final Doublets SR TFO ON qx=2.66mrad qy=9.24mrad 16sx,IP8.11mm 51sy,IP6.25mm TFO OFF qx=2.66mrad qy=9.24mrad 11sx,IP5.47mm 46sy,IP5.64mm IP Last Bending q=-67.5mrad XIP=-6.08mm Final Doublets Half aperture 10mm
Energy Collimation Section SPE aperture SPE ABE Kuroda, SAD, 10000macro, IP sp=3.0-3 99.21% sp,IP= 0.2951 sp =1.0-2 57.34% sp,IP= 0.4441 sp =2.0-2 30.79% sp,IP= 0.4626 sp =3.0-2 20.60% sp,IP= 0.4616 Aperture, sp,IP=0.9% SPE Ax=1.6mm -> 3.1mm ABE Ax=3.4mm -> 5.8mm
Betatron Collimation Section Kuroda, SAD, 10000macro, IP X: –30 to 30sx Random Y: –70 to 70sy Random sp =1.0-2 Gauss Final Focus CollimationのAB10 がBeam tailのCollimationに効い ている。 AB10 Ax=17.96sx Ay=50.74sy IP Init SPE AB10