Title :
A large aperture final focus system for TESLA
Author_Institution :
DAPNIA-SEA, Gif-sur-Yvette, France
Abstract :
An alternative set of beam parameters at the IP is presented for TESLA. Thanks to a larger aspect ratio, it allows a substantial reduction of the beamstrahlung effect. The optics of a final focus system based on the standard sextupole correction of the chromatic aberrations is described. The particularity of this system is, along with the 3 m long last drift space, the large aperture of the last quadrupoles is possibly superconducting, which permits the clearance of the disrupted beams and beamstrahlung photons. Due to the large bunch separation in TESLA, head-on collisions are therefore possible with this system. Its energy acceptance and misalignment tolerances are analyzed
Keywords :
aberrations; beam handling equipment; beam handling techniques; electron accelerators; electron optics; focusing; linear accelerators; TESLA; aspect ratio; beam parameters; beamstrahlung effect; bunch separation; chromatic aberrations; disrupted beams; electron optics; energy acceptance; head-on collisions; interaction point; large aperture final focus system; last drift space; last quadrupoles; misalignment tolerances; sextupole correction; superconducting accelerator; Apertures; Energy loss; Energy resolution; Linear particle accelerator; Particle beams; Stimulated emission; Synchrotron radiation;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308832
