Title :
Slow-wave electrode structures for the ESS 2.5 MeV fast chopper
Author :
Clarke-Gayther, Michael A.
Author_Institution :
CLRC RAL, Didcot, UK
Abstract :
Slow-wave electrode designs for the European Spallation Source (ESS) 2.5 MeV fast beam chopper are described. Broad-band transmission line properties for the initial planar and helical designs have been refined by modelling electromagnetic fields in the Finite Difference Time Domain (FDTD) ´Microwave Studio´ code. A compact, radiation hard, vacuum compatible helical structure made from linked strip-line and micro-strip sections has been developed. Simulated characteristics in the frequency and time domain, and the effects of E-field non-uniformity are presented.
Keywords :
beam choppers; beam handling equipment; finite difference time-domain analysis; neutron sources; slow wave structures; 2.5 MeV; E-field nonuniformity; European Spallation Source; broadband transmission line properties; electromagnetic field modeling; fast beam chopper; finite difference time domain; slow-wave electrode designs; slow-wave electrode structures; Choppers; Electrodes; Electronic switching systems; Finite difference methods; Frequency; Particle beams; Planar transmission lines; Power transmission lines; Space vector pulse width modulation; Time domain analysis;
Conference_Titel :
Particle Accelerator Conference, 2003. PAC 2003. Proceedings of the
Print_ISBN :
0-7803-7738-9
DOI :
10.1109/PAC.2003.1288565
