Dispersion and betatron matching into the linac
- 9 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
In high energy linear colliders, the low emittauce beam from a damping ring has to be preserved all the way to the linac, in the linac and to the interaction point. In particu- lar, the Ring-To-Linac (RTL) section of the SLAC Linear Collider (SLC) should provide an exact betatron and dis- persion match from the damping ring to the linac. A beam with a non-zero dispersion shows up immediately as an increased emittance, while with a betatron mismatch the beam filaments in the linac. Experimental tests and tuning procedures have shown that the linearized beta matching algorithms are insufficient if the actual transport liue has some unknown errors not included in the model. Also, ad- justing quadrupole strengths steers the beam if it is offset in the quadrupole magnets. These and other effects have lead to a lengthy tuning process, which in the end improves the matching, but is not optimal. Different ideas will be discussed which should improve this matching procedure and make it a more reliable, faster and simpler process.Keywords
This publication has 4 references indexed in Scilit:
- The physical way of standardizing magnetsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Transverse phase space in the presence of dispersionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Wire scanners for beam size and emittance measurements at the SLCPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002
- Chromatic correction in the SLC bunch length compressorsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2002