Title :
Progress on the CLIC final focus system
Author :
Napoly, O. ; Sievers, P. ; Taylor, T. ; Zotter, B.
Author_Institution :
CERN, Geneva, Switzerland
Abstract :
The final focus system has been adapted to the revised parameter list for CLIC (CERN Linear Collider). It is expected that lower emittances are obtainable in the damping rings and the blowup in the main linac can be contained to 25%. In that case the luminosity would no longer be limited by synchrotron radiation in the final quadrupoles, and a luminosity above 10/sup 33/ cm/sup -2/ s/sup -1/ could be reached for bunches colliding head on. However, finite crossing angles are required so the disrupted beam can pass through a special aperture in the first interaction region quadrupole. The reduction of luminosity due to this crossing angle and due to unavoidable misalignments has been studied as a function of bunch length with a particle tracking code. Two designs of quadrupoles are being evaluated.<>
Keywords :
beam handling equipment; focusing; linear accelerators; CERN Linear Collider; CLIC final focus system; blowup; bunch length; damping rings; disrupted beam; final quadrupoles; finite crossing angles; first interaction region; luminosity; main linac; misalignments; particle tracking code; synchrotron radiation; Apertures; Damping; Electrooptic effects; Linear particle accelerator; Magnetic heads; Particle beams; Particle tracking; Permanent magnets; Ray tracing; Synchrotron radiation;
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.1991.165243
