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@InProceedings{richard:napac2019-tupls08,
author = {C.J. Richard and J.-P. Carneiro and L.R. Prost and A.V. Shemyakin},
title = {{Analysis of Allison Scanner Phase Portraits Using Action-Phase Coordinates}},
booktitle = {Proc. NAPAC'19},
pages = {467--470},
paper = {TUPLS08},
language = {english},
keywords = {MEBT, optics, quadrupole, ECR, focusing},
venue = {Lansing, MI, USA},
series = {North American Particle Accelerator Conference},
number = {4},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {10},
year = {2019},
issn = {2673-7000},
isbn = {978-3-95450-223-3},
doi = {10.18429/JACoW-NAPAC2019-TUPLS08},
url = {http://jacow.org/napac2019/papers/tupls08.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-TUPLS08},
abstract = {Allison scanners provide detailed information on the beam transverse phase space. An effective way for analyzing the beam distribution from these measurements is to use action-phase coordinates, where beam propagation in a linear lattice is reduced to advancing the phase. This report presents such analysis for measurements performed with a 2.1 MeV, 5 mA H⁻ beam in the MEBT of the PIP2IT test accelerator at Fermilab. In part, with the choice of calculating the Twiss parameters over the high intensity portion of the beam, the beam core is found to be phase-independent with intensity decreasing exponentially with action, while the beam tails exhibit a clear phase dependence that is stable over the beam line.},
}