Emittance measurement and modeling of the ALS 50 MeV linac to booster line

The Twiss parameters and emittance have been measured for the ALS linac through non-linear /spl chisup 2/ fitting of the measured beam size (fixed location) vs. focal strength of a quadrupole triplet. The obtained values have been used to calculate the expected beam size and dispersion along the linac-to-booster transport line giving good agreement with measurements. The efforts resulted in superior injection into the booster.<>