Title :
Simulations of currents in X-band accelerator structures using 2D and 3D particle-in-cell code
Author :
Dolgashev, Valery A. ; Tantawi, Sami G.
Author_Institution :
Stanford Linear Accel. Center, Stanford Univ., CA, USA
Abstract :
The accelerating gradient is one of the crucial parameters affecting design, construction and cost of next-generation linear accelerators. For a specified final energy, the gradient sets the accelerator length, and for a given accelerating structure (and pulse repetition rate) it determines the power consumption. Accelerating gradients in the order of 100 MV/m have been reached in short (~ 20 cm) standing wave and traveling wave X-band accelerating structures. But, recent experiments have shown damage to traveling wave accelerating structures at gradients as low as 50 MV/m after 1000 hours of operation. RF breakdown is a probable cause of this damage. An extensive experimental and theoretical program to determine a safe operating gradient for the Next Linear Collider (NLC) is under way in SLAC. The present work is a part of that program
Keywords :
accelerator RF systems; beam handling equipment; electron accelerators; electron beams; high energy physics instrumentation computing; linear colliders; particle beam dynamics; 1000 h; 20 cm; NLC; Next Linear Collider; PIC; SLAC; X-band accelerator structures; accelerating gradient; accelerator length; next-generation linear accelerators; particle-in-cell code; power consumption; pulse repetition rate; radiofrequency breakdown; safe operating gradient; traveling wave accelerating structure damage; Acceleration; Costs; Electric breakdown; Geometry; Linear accelerators; Particle accelerators; Physics; Radio frequency; Rectangular waveguides; Solid modeling;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.988260
