TY - JOUR
T1 - A low-energy-spread rf accelerator for a far-infrared free electron laser
AU - van der Geer, C.A.J.
AU - Bakker, R.J.
AU - van der Meer, A.F.G.
AU - van Amersfoort, P.W.
AU - Gillespie, W.A.
AU - Saxon, G.
AU - Poole, M.W.
N1 - Copyright 2008 Elsevier B.V., All rights reserved.
PY - 1993
Y1 - 1993
N2 - A high electron current and a small energy spread are essential for the operation of a free electron laser (FEL). In this paper we discuss the design and performance of the accelerator for FELIX, the free electron laser for infrared experiments. The system consists of a thermionic gun, a prebuncher, a buncher and two standard commercial linac sections. The gun is operated with a pulse duration of 280 ps and a bunch charge of 200 pC. After compression to 35 ps by the prebuncher, the bunches are accelerated to 4 MeV in the buncher and simultaneously compressed to 6 ps. The principle of the method is that the order of the electrons is conserved in the buncher, so that the resulting more or less linear energy-phase relationship along each bunch can be compensated effectively against space charge forces and the accelerating field gradient in the linacs, via an appropriate choice of the phase of the rf wave. Behind the linacs an rms energy spread of 0.30% has been measured.
AB - A high electron current and a small energy spread are essential for the operation of a free electron laser (FEL). In this paper we discuss the design and performance of the accelerator for FELIX, the free electron laser for infrared experiments. The system consists of a thermionic gun, a prebuncher, a buncher and two standard commercial linac sections. The gun is operated with a pulse duration of 280 ps and a bunch charge of 200 pC. After compression to 35 ps by the prebuncher, the bunches are accelerated to 4 MeV in the buncher and simultaneously compressed to 6 ps. The principle of the method is that the order of the electrons is conserved in the buncher, so that the resulting more or less linear energy-phase relationship along each bunch can be compensated effectively against space charge forces and the accelerating field gradient in the linacs, via an appropriate choice of the phase of the rf wave. Behind the linacs an rms energy spread of 0.30% has been measured.
UR - http://www.scopus.com/inward/record.url?scp=0027677177&partnerID=8YFLogxK
U2 - 10.1016/0168-9002(93)90828-6
DO - 10.1016/0168-9002(93)90828-6
M3 - Article
AN - SCOPUS:0027677177
SN - 0168-9002
VL - 334
SP - 607
EP - 616
JO - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectometers, Detectors and Associated Equipment
IS - 2-3
ER -