Title :
Design of a γt-jump system for Fermilab Main Injector
Author :
Chou, W. ; Brown, B.C. ; Fang, S. ; Leibfritz, J. ; Ng, K.Y. ; Pfeffer, H. ; Terechkine, I.
Author_Institution :
Fermi Nat. Accel. Lab., Batavia, IL, USA
Abstract :
In order to control the beam emittance and reduce the particle losses during the transition crossing at high intensity, a conceptual design of a γt-jump system for the FNAL Main Injector is presented. It is a first-order system employing local dispersion inserts at existing dispersion free straight sections. The goal is to provide a jump of Δγt from +1 to -1 within 0.5 ms. The system consists of 8 sets of pulsed quadrupole triplets. These quads have pole tips of hyperbolic shape and thin laminations. The power supply uses a GTO as the fast switch and a resonant circuit with a 1 kHz resonant frequency. The elliptical beam tube is made of Inconel 718, which has high electrical resistivity and high strength. Details of the lattice layout and subsystems design are presented
Keywords :
accelerator magnets; particle beam injection; power supplies to apparatus; proton accelerators; switched mode power supplies; synchrotrons; thyristor circuits; γt-jump system; 1 kHz; FNAL Main Injector; Fermilab; GTO; Inconel 718; Main Injector; beam emittance; beam tube; dispersion inserts; particle losses; power supply; pulsed quadrupole triplets; Control systems; Lamination; Particle beam injection; Particle beams; Power supplies; Pulsed power supplies; RLC circuits; Shape; Switches; Switching circuits;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.749906
