Design of Planar Millimeter-Wave Metallic Structures for Wakefield Acceleration

Zhang, L. and He, W. and Jamison, S. and Whyte, C.G. and Ronald, K. and Phelps, A.D.R. and Cross, A.W. (2019) Design of Planar Millimeter-Wave Metallic Structures for Wakefield Acceleration. Journal of Infrared, Millimeter, and Terahertz Waves, 40 (1). pp. 48-62. ISSN 1866-6892

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Abstract

Linear accelerators operating at millimeter or sub-terahertz frequencies and short pulse duration have the advantages of lower power consumption and high repetition rate. In this paper planar metallic accelerating structures with different modes operating at 210 GHz were designed. A tolerance study was also carried out to determine the sensitivities of the geometric parameters to the wakefield acceleration performance. The generated Wakefield was simulated using the beam parameter of the Compact Linear Advanced Research Accelerator (CLARA) test facility at Daresbury Laboratory. For a 55 MeV single electron bunch with charge of 250 pC and a bunch length of 0.27 mm (0.9 ps), an equivalent acceleration gradient of 20 MV/m was achieved in the simulation. The relatively modest acceleration gradient was limited by the charge in a single bunch. The acceleration gradient could be further improved by using a bunch train which has larger total bunch charge. From the simulation, the acceleration gradient of 100 MV/m can be generated when it is driven by a 10-bunch beam train.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Infrared, Millimeter, and Terahertz Waves
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/3100/3108
Subjects:
ID Code:
130727
Deposited By:
Deposited On:
29 Jan 2020 15:45
Refereed?:
Yes
Published?:
Published
Last Modified:
29 Mar 2020 06:22