LINAC2022 - List of Authors (Ostroumov, P.N.)

Paper

Title

Page

Developments Towards FRIB Upgrade to 400 MeV/u for Heaviest Uranium Ions

653

K.E. McGee, K. Elliott, A. Ganshyn, W. Hartung, S.H. Kim, P.N. Ostroumov, J.T. Popielarski, L. Popielarski, A. Taylor, T. Xu
FRIB, East Lansing, Michigan, USA
G.V. Eremeev, F. Furuta, M. Martinello, O.S. Melnychuk, A.V. Netepenko
Fermilab, Batavia, Illinois, USA
B.M. Guilfoyle, M.P. Kelly, T. Reid
ANL, Lemont, Illinois, USA

High-Q₀ medium-velocity (beta opt = 0.6) 5-cell elliptical cavities for superconducting linacs are critical technology for advancing current and future projects such as the Proton Improvement Plan II linac and the proposed energy upgrade of Michigan State University’s Facility For Rare Isotope Beams linac, FRIB400. Previous work established the validity of the novel geometry of the FRIB400 prototype 644 MHz 5-cell elliptical β = 0.65 cavities for future high Q₀ development. In collaboration with FNAL, two leading-edge high-Q₀ recipes, N-doping and Mid-T baking, were tested in the 5-cell format. 2/0 N-doping + cold electropolishing was successful at achieving FRIB400 and PIP-II Q₀ requirements, achieving an unprecedented 3.8 x 10¹⁰ at 17.5 MV/m, satisfying the FRIB400 Q₀ requirements by 1.75 times in a low-gauss environment. Mid-T baking exceeded FRIB400 Q₀ requirements by 1.4 times, and benefitted from decreased residual resistance compared to the N-doped cavity test. Systematic ultrasonic thickness measurements in single-cell revealed bulk (150 microns) EP with the modified EP tool is consistent across the inner surfaces of the cavity walls.

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Slides TH1AA02 [44.708 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TH1AA02

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Received ※ 11 August 2022 — Revised ※ 22 August 2022 — Accepted ※ 23 September 2022 — Issue date ※ 14 October 2022

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TH1AA05

R&D of Liquid Lithium Stripper at FRIB

668

T. Kanemura, N.K. Bultman, R. Madendorp, F. Marti, T. Maruta, Y. Momozaki, J.A. Nolen, P.N. Ostroumov, A.S. Plastun, J. Wei, Q. Zhao
FRIB, East Lansing, Michigan, USA
D.B. Chojnowski, Y. Momozaki, J.A. Nolen, C.B. Reed, J.R. Specht
ANL, Lemont, Illinois, USA
M.J. LaVere
MSU, East Lansing, Michigan, USA

Funding: The U.S. Department of Energy, Office of Science, Office of Nuclear Physics. The Facility for Rare Isotope Beams (FRIB) is a DOE Office of Science User Facility under Award Number DE-SC0000661
Charge stripping is one of the most important processes in the acceleration of intense heavy ion beams, and the charge stripper greatly affects the performance of the accelerator facility. In this talk, the design method and the achieved performance of the liquid lithium stripper recently developed for FRIB will be reported.

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Slides TH1AA05 [1.663 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TH1AA05

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Received ※ 10 August 2022 — Revised ※ 20 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 16 September 2022

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper	Title	Page
TH1AA02	Developments Towards FRIB Upgrade to 400 MeV/u for Heaviest Uranium Ions	653
	K.E. McGee, K. Elliott, A. Ganshyn, W. Hartung, S.H. Kim, P.N. Ostroumov, J.T. Popielarski, L. Popielarski, A. Taylor, T. Xu FRIB, East Lansing, Michigan, USA G.V. Eremeev, F. Furuta, M. Martinello, O.S. Melnychuk, A.V. Netepenko Fermilab, Batavia, Illinois, USA B.M. Guilfoyle, M.P. Kelly, T. Reid ANL, Lemont, Illinois, USA
	High-Q₀ medium-velocity (beta opt = 0.6) 5-cell elliptical cavities for superconducting linacs are critical technology for advancing current and future projects such as the Proton Improvement Plan II linac and the proposed energy upgrade of Michigan State University’s Facility For Rare Isotope Beams linac, FRIB400. Previous work established the validity of the novel geometry of the FRIB400 prototype 644 MHz 5-cell elliptical β = 0.65 cavities for future high Q₀ development. In collaboration with FNAL, two leading-edge high-Q₀ recipes, N-doping and Mid-T baking, were tested in the 5-cell format. 2/0 N-doping + cold electropolishing was successful at achieving FRIB400 and PIP-II Q₀ requirements, achieving an unprecedented 3.8 x 10¹⁰ at 17.5 MV/m, satisfying the FRIB400 Q₀ requirements by 1.75 times in a low-gauss environment. Mid-T baking exceeded FRIB400 Q₀ requirements by 1.4 times, and benefitted from decreased residual resistance compared to the N-doped cavity test. Systematic ultrasonic thickness measurements in single-cell revealed bulk (150 microns) EP with the modified EP tool is consistent across the inner surfaces of the cavity walls.

	please see instructions how to view/control embeded videos
	Slides TH1AA02 [44.708 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TH1AA02
About •	Received ※ 11 August 2022 — Revised ※ 22 August 2022 — Accepted ※ 23 September 2022 — Issue date ※ 14 October 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TH1AA05	R&D of Liquid Lithium Stripper at FRIB	668
	T. Kanemura, N.K. Bultman, R. Madendorp, F. Marti, T. Maruta, Y. Momozaki, J.A. Nolen, P.N. Ostroumov, A.S. Plastun, J. Wei, Q. Zhao FRIB, East Lansing, Michigan, USA D.B. Chojnowski, Y. Momozaki, J.A. Nolen, C.B. Reed, J.R. Specht ANL, Lemont, Illinois, USA M.J. LaVere MSU, East Lansing, Michigan, USA
	Funding: The U.S. Department of Energy, Office of Science, Office of Nuclear Physics. The Facility for Rare Isotope Beams (FRIB) is a DOE Office of Science User Facility under Award Number DE-SC0000661 Charge stripping is one of the most important processes in the acceleration of intense heavy ion beams, and the charge stripper greatly affects the performance of the accelerator facility. In this talk, the design method and the achieved performance of the liquid lithium stripper recently developed for FRIB will be reported.

	please see instructions how to view/control embeded videos
	Slides TH1AA05 [1.663 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TH1AA05
About •	Received ※ 10 August 2022 — Revised ※ 20 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 16 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)