CERN Accelerating science

Article
Report number	SLAC-PUB-11767
Title	Studies of Room Temperature Accelerator Structures for the ILC Positron Source
Author(s)	Wang, Juwen W ; Adolphsen, Chris ; Bharadwaj, V K ; Bowden, Gordon B ; Dolgashev, Valery A ; Jones, Roger M ; Jongewaard, Erik N ; Lewandowski, James R ; Li, Zenghai ; Miller, Roger H
Affiliation	(SLAC)
Publication	2005
Imprint	May 2005
Number of pages	3
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2827
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	ILC
Abstract	There are many challenges in the design of the normal-conducting portion of ILC positron injector system such as achieving adequate cooling with the high rf and particle loss heating, and sustaining high accelerator gradients during millisecond-long pulses in a strong magnetic field. The proposed design for the positron injector contains both standing-wave and traveling-wave L-band accelerator structures for high RF efficiency, low cost and ease of fabrication. This paper presents results from studies of particle energy deposition for both undulator based and conventional positron sources, cooling system design, accelerator structure optimization, RF pulse heating, cavity frequency stabilization, and RF feed system design.