Study of the Optics Parameters in the LT-LTB-BI Transfer Line

The Twiss parameters and dispersion in the Linac II to Booster transfer line (LT-LTB-BI) have been measured during the 2003 run. For the Twiss parameters, we find very good agreement between simulation and measurement. Furthermore, the line appears to be very well matched at the Booster injection point. Also for the dispersion, we find very good agreement of simulation and measurements. We have computed and experimentally tested a new optics, which nullifies the dispersion and dispersion derivative in the last part of the line (achromatic line). Although such a solution exists on paper, it was found that good transmission and minimised dispersion are conflicting constraints.