This paper presents measurements of the beam transmission performed on the 4-rod RFQ currently under operation at Fermilab. The beam current has been measured at the RFQ exit as a function of the magnetic field strength in the two LEBT solenoids. This measurement is compared with scans performed on the FermiGrid with the beam dynamics code TRACK. A particular attention is given to the impact, on the RFQ beam transmission, of the space-charge neutralization in the LEBT.
@article{arxiv.1411.3614,
title = {Transmission efficiency measurement at the FNAL 4-rod RFQ},
author = {J. -P. Carneiro and F. G. Garcia and J. -F Ostiguy and A. Saini and R. Zwaska and B. Mustapha and P. Ostroumov},
journal= {arXiv preprint arXiv:1411.3614},
year = {2014}
}