CERN Accelerating science

Article
Report number	CERN-PS-2000-052-LP ; CLIC-Note-455
Title	An Injector for the CLIC Test Facility (CTF3)
Author(s)	Braun, H (CERN) ; Pittin, R (CERN) ; Rinolfi, Louis (CERN) ; Zhou, F (CERN) ; Mouton, B (Orsay) ; Miller, R (SLAC) ; Yeremian, A D (SLAC)
Publication	2000
Imprint	24 Aug 2000
Number of pages	4
In:	20th International Linear Accelerator Conference, Monterey, CA, USA, 21 - 25 Aug 2000, pp.e-proc. MOB02
Subject category	Accelerators and Storage Rings
Accelerator/Facility, Experiment	CLIC ; CTF3
Abstract	The CLIC Test Facility (CTF3) is an intermediate step to demonstrate the technical feasibility of the key concepts of the new RF power source for CLIC. CTF3 will use electron beams with an energy range adjustable from 170 MeV (3.5 A) to 380 MeV (with low current). The injector is based on a thermionic gun followed by a classical bunching system embedded in a long solenoidal field. As an alternative, an RF photo-injector is also being studied. The beam dynamics studies on how to reach the stringent beam parameters at the exit of the injector are presented. Simulations performed with the EGUN code showed that a current of 7 A can be obtained with an emittance less than 10 mm.mrad at the gun exit. PARMELA results are presented and compared to the requested beam performance at the injector exit. Sub-Harmonic Bunchers (SHB) are foreseen, to switch the phase of the bunch trains by 180 degrees from even to odd RF buckets. Specific issues of the thermionic gun and of the SHB with fast phase switch are discussed.

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