Title :
A practical algorithm for chromaticity correction in linear collider final focus systems
Author_Institution :
SLAC, Stanford Univ., CA, USA
Abstract :
The details of a tuning algorithm are described for minimizing the chromatic error in a final focus system, using the two families of sextupoles incorporated in a chromatic correction section. The chromatic errors are characterized by the beam waist location of off-energy particles with respect to the interaction point location. It is shown that linear combinations of changes in strength to the two sextupole families can move the waist position of off-energy beams independently in the X and Y planes. Measurements at the SLC (SLAC Linear Collider) have shown that the off-energy waist position can be measured as a function of the sextupole multiknob to minimize chromaticity.<>
Keywords :
beam handling techniques; electron accelerators; focusing; linear accelerators; SLAC Linear Collider; SLC; beam waist location; chromaticity correction; interaction point location; linear collider final focus systems; multiknob; off-energy beams; off-energy particles; sextupoles; tuning algorithm; waist position; Carbon capture and storage; Colliding beam devices; Degradation; Dispersion; Error correction; Linear accelerators; Particle beams; Phase measurement; Position measurement; Size measurement;
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.1991.165253
