Transmission efficiency measurement at the FNAL 4-rod RFQ
J.-P. Carneiro, F.G. Garcia, J.-F Ostiguy, A. Saini, R. Zwaska, (Fermilab) B. Mustapha, P. Ostroumov (Argonne)
TL;DR
This paper reports on measurements of beam transmission efficiency in Fermilab's 4-rod RFQ, analyzing the effects of magnetic fields and space-charge neutralization, and comparing experimental data with beam dynamics simulations.
Contribution
It provides new experimental data on RFQ transmission efficiency and evaluates the impact of space-charge neutralization using both measurements and simulations.
Findings
Beam transmission varies with magnetic field strength.
Space-charge neutralization significantly affects RFQ transmission.
Simulation results align with experimental measurements.
Abstract
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.
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Taxonomy
TopicsParticle accelerators and beam dynamics · Particle Accelerators and Free-Electron Lasers · Superconducting Materials and Applications