The document provides an overview of the ISIS synchrotron, including its operation, components, and challenges. Key points: - ISIS accelerates proton beams from 70 MeV to 800 MeV using repeated low-voltage RF acceleration over thousands of turns in a circular ring. - Focusing quadrupole magnets are used to maintain the transverse beam size and stability. Injection and extraction systems introduce and remove beams from the ring. - Operating a high-intensity machine like ISIS presents challenges in tightly controlling fractional beam losses to minimize activation and prevent damage.

1. An Introduction to the ISIS Synchrotron Chris Warsop

5. 52 m

15. The ISIS Machine Cycle Extraction Acceleration Trapping Injection

18. New DHRF Cavities 6 h=2 cavities 2 h=4 cavities 2 h=4 cavities

19. Some Measurements of Longitudinal Motion Injected Chopped Beam (100 ns, 1/15 of circumference) RF Off RF On

27. Injection – Simplest Model Injection Septum Magnet Injected Particles Machine Circumference Transverse Displacement

35. Measurements of Transverse Motion Transverse oscillation observed at one point in ring over 30 turns

36. Measurements of Transverse Motion Development of Horizontal and Vertical Profiles -0.5 – 1.5 ms

39. Diagnostics ~ Some Machine Details