Title :
An experimental test of the theory of the stimulated dielectric wakefield accelerator
Author :
Fang, J.-M. ; Marshall, T.C. ; Hirshfield, J.L. ; LaPointe, M.A. ; Zhang, T.-B. ; Wang, X.J.
Author_Institution :
Columbia Univ., New York, NY, USA
Abstract :
We have installed a dielectric-lined wakefield accelerator at the Accelerator Test Facility (ATF), Brookhaven National Laboratory. The first experiment, reported here, uses a single 0.2 nC, 10 psec bunch of 40 MeV electrons to excite the multi-mode TM0m wakefields which trail the bunch. The device is configured as a cylindrical waveguide containing an annular alumina liner; the electrons move along the axis of symmetry inside a 3 mm diameter bore hole. The spectrum of modes set up by the electron bunch is picked up by a radial probe and detected by a spectrum analyzer; this is compared with theory. This spectrum can be used to construct the axial wakefield pattern
Keywords :
dielectric-loaded waveguides; electron accelerators; particle beam bunching; wakefield accelerators; 40 MeV; Accelerator Test Facility; annular alumina liner; axial wakefield pattern; cylindrical waveguide; dielectric-lined wakefield accelerator; electron bunch; multi-mode TM0m wakefields; spectrum analyzer; stimulated dielectric wakefield accelerator; Boring; Charge carrier processes; Dielectrics; Electrons; Laboratories; Life estimation; Probes; Spectral analysis; Test facilities; Testing;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792392
