Title :
Model work on a transfer structure for CLIC
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
A structure is needed to produce the acceleration in the CLIC (CERN Linear Collider) main linac 12-ns, 30-GHz, and 40-MW RF pulses. The structure input is four trains (spaced by 2.84 ns) of 11 drive bunchlets (10/sup 12/ e, sigma <1 mm) separated by 33.3 ps. A concept based on a smooth beam chamber with coupling holes into waveguides and the TEM wave associated with the drive beam bunchlets is proposed and analyzed in scale models. The TEM wave is simulated with transmission lines. The structure response is measured in the frequency domain and then multiplied with the bunchlet spectrum, yielding, via a subsequent inverse Fourier transform, the amplitude and phase versus time of the resulting 30-GHz pulse.<>
Keywords :
Fourier transforms; beam handling equipment; linear accelerators; rectangular waveguides; CERN Linear Collider; CLIC; RF pulses; TEM wave; acceleration; bunchlet spectrum; coupling holes; drive beam bunchlets; frequency domain; inverse Fourier transform; main linac; scale models; smooth beam chamber; structure input; structure response; transfer structure; transmission lines; waveguides; Acceleration; Frequency domain analysis; Frequency measurement; Linear particle accelerator; Optical coupling; Phase measurement; Pulse measurements; Radio frequency; Time measurement; Transmission line measurements;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.165248
