Title :
Design of the injection kicker magnet system for CERN´s 14 TeV proton collider LHC
Author :
Ducimetière, L. ; Jansson, U. ; Schröder, G.H. ; Vossenberg, E.B. ; Barnes, M.J. ; Wait, G.D.
Author_Institution :
SL Div., CERN, Geneva, Switzerland
Abstract :
Two counter-rotating proton beams will be injected into the LHC at an energy of 450 GeV by two kicker magnet systems, producing magnetic field pulses of approximately 750 ns rise time and 6.6 /spl mu/s flat top duration. To avoid dilution of the beam emittance during injection, a stringent design requirement of the system is a flat top ripple of the magnetic field of less than /spl plusmn/0.5%. Both injection systems are composed of 4 travelling wave kicker magnets of 2.17 m length each, powered by pulse forming networks (PFNs) and matched to their characteristic impedance. To achieve the high required kick strength of 1.2 Tm, for a compact and cost efficient design, a comparably low characteristic impedance of 5 /spl Omega/ has been chosen. The electrical circuit of the system is being designed with the help of PSpice computer modelling. Most known parasitic elements are included in the model to obtain a realistic pulse response prediction. The present paper reports on design and modeling results of the LHC injection kicker magnet system that has several novel and demanding design requirements.
Keywords :
SPICE; accelerator magnets; circuit analysis computing; colliding beam accelerators; particle beam injection; power supplies to apparatus; proton accelerators; pulsed power technology; storage rings; synchrotrons; 14 TeV; 2.17 m; 450 GeV; 6.6 mus; 750 ns; CERN; LHC proton collider; PSpice computer modelling; beam emittance; electrical circuit; flat top ripple; injection kicker magnet system; low characteristic impedance; magnetic field pulses; magnetic field ripple; parasitic elements; pulse forming networks; pulse response prediction; travelling wave kicker magnets; Costs; Impedance; Large Hadron Collider; Magnetic fields; Magnetic separation; Particle beam injection; Particle beams; Protons; Structural beams; Superconducting magnets;
Conference_Titel :
Pulsed Power Conference, 1995. Digest of Technical Papers., Tenth IEEE International
Conference_Location :
Albuquerque, NM, USA
Print_ISBN :
0-7803-2791-8
DOI :
10.1109/PPC.1995.599814