The Joint Accelerator Conferences Website (JACoW) is an international collaboration that publishes the proceedings of accelerator conferences held around the world.
@InProceedings{fukushima:napac2019-wezba3,
author = {K. Fukushima and T. Maruta and P.N. Ostroumov and T. Yoshimoto},
title = {{No Beam-Loss Quadrupole Scan for Transverse Phase Space Measurements}},
booktitle = {Proc. NAPAC'19},
pages = {650--652},
paper = {WEZBA3},
language = {english},
keywords = {quadrupole, linac, emittance, cryomodule, beam-losses},
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-WEZBA3},
url = {http://jacow.org/napac2019/papers/wezba3.pdf},
note = {https://doi.org/10.18429/JACoW-NAPAC2019-WEZBA3},
abstract = {Facility for Rare Isotope Beams (FRIB) at Michigan State University is based on a high power heavy ion linac and beam commissioning is under way. For evaluation of beam Twiss parameters and rms emittance, we routinely use multiple profile measurements while the strength of an upstream quadrupole is varied. The change of the quadrupole strength results in a beam mismatch downstream of the profile monitor which can cause beam losses. This is not acceptable in a high energy beamline. To avoid this transverse mismatch, we developed a beam matching procedure by optimization of quadrupoles’ setting downstream of the profile monitor. Using this procedure we were able to eliminate beam losses during the quadrupole scan, and evaluate beam Twiss parameters and rms emittance. Examples of using this procedure in the folding segment of the FRIB linac will be reported.},
}