IPAC2022 - Table of Session: TUOZSP (Contributed Orals: Circular and Linear Colliders)

Paper	Title	Page
TUOZSP1	Prospects for Optics Measuements in FCC-ee	827
	J. Keintzel, R. Tomás García, F. Zimmermann CERN, Meyrin, Switzerland
	Within the framework of the Future Circular Collider Feasibility Study, the design of the electron-positron collider FCC-ee is optimised, as a possible future double collider ring, currently foreseen to start operation during the 2040s. With close to 100 km of circumference and strong synchrotron radiation damping at highest beam energy, adequate beam measurements are needed to control the optics at the desired level. Various possible techniques to measure the optics in FCC-ee are explored, including the option of turn-by-turn measurements in combination with an AC-dipole.
	Slides TUOZSP1 [2.738 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUOZSP1
About •	Received ※ 08 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 28 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUOZSP2	Chromatic X-Y Coupling Correction by Tilting Sextupole Magnets in the SuperKEKB Positron Ring
	M. Masuzawa, K. Egawa, Y. Funakoshi, T. Kawamoto, H. Koiso, A. Morita, S. Nakamura, K. Ohmi, Y. Ohnishi, R. Sugahara, H. Sugimoto, R. Ueki, D. Zhou KEK, Ibaraki, Japan K. Oide CERN, Meyrin, Switzerland
	Chromatic x-y coupling correction at the interaction point was carried out using skew sextupole field created by tilting the sextupole magnets in the SuperKEKB positron ring. Twenty four sextupole magnets are mounted on a tilting table and their tilt angles can be varied form - 30 degree to + 30 degree remotely to control the ratio of the skew to normal sextupole magnetic field components. In the 2021c run, one of the chromatic coupling parameters was varied using different setups of the tilting angles of the 24 sextupole magnets for the first time in a collider. It was found that the emittance growth at the primary (nux-nuy-nus=n) and secondary (nux-nuy-2nus=n) synchro-beta resonance lines can be controlled by tilting the sextupole magnets. Luminosity increase followed after optimizing the chromatic coupling parameters and finding a better tune working point. The study results are summarized in the paper.
	Slides TUOZSP2 [19.499 MB]
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TUOZSP3	The European ERL Roadmap	831
	A. Hutton JLab, Newport News, Virginia, USA M. Klein The University of Liverpool, Liverpool, United Kingdom B.C. Kuskepresenter HZB, Berlin, Germany
	Funding: AH supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177 Following the European Strategy process in 2019, five Roadmap Panels were set up to prepare the technologies needed for future accelerators and colliders: high-field magnets, SRF, muon colliders, plasma wakefield accelerators and Energy Recovery Linacs (ERLs). The ERL Roadmap Panel, consisting of ERL experts from around the world, first developed an overview of current and future ERLs. From this it was possible to carry out a gap analysis to see what R&D would be needed, from which the Roadmap could be developed. The European ERL Roadmap focused on three main aspects: 1) the continuation and development of facility programs for which no additional funds are needed, S-DALINAC in Darmstadt and MESA in Mainz; 2) technology development for room-temperature HOM damping and twin-axis SRF cavities; 3) the timely upgrade of bERLinPro for 100 mA current and the construction of PERLE at Orsay as a dedicated 10 MW power multi-turn facility. The roadmap entails a vision of future energy frontier electron-positron and electron-hadron collider and describes a high quality ERL program for 4.4 K SRF technology at high Q₀. The presentation will address the ERL Roadmap process and result in detail.
	Slides TUOZSP3 [2.868 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUOZSP3
About •	Received ※ 02 June 2022 — Revised ※ 17 June 2022 — Accepted ※ 25 June 2022 — Issue date ※ 29 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Prospects for Optics Measuements in FCC-ee

827

J. Keintzel, R. Tomás García, F. Zimmermann
CERN, Meyrin, Switzerland

Within the framework of the Future Circular Collider Feasibility Study, the design of the electron-positron collider FCC-ee is optimised, as a possible future double collider ring, currently foreseen to start operation during the 2040s. With close to 100 km of circumference and strong synchrotron radiation damping at highest beam energy, adequate beam measurements are needed to control the optics at the desired level. Various possible techniques to measure the optics in FCC-ee are explored, including the option of turn-by-turn measurements in combination with an AC-dipole.

Slides TUOZSP1 [2.738 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUOZSP1

About •

Received ※ 08 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 17 June 2022 — Issue date ※ 28 June 2022

Cite •

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

TUOZSP2

Chromatic X-Y Coupling Correction by Tilting Sextupole Magnets in the SuperKEKB Positron Ring

M. Masuzawa, K. Egawa, Y. Funakoshi, T. Kawamoto, H. Koiso, A. Morita, S. Nakamura, K. Ohmi, Y. Ohnishi, R. Sugahara, H. Sugimoto, R. Ueki, D. Zhou
KEK, Ibaraki, Japan
K. Oide
CERN, Meyrin, Switzerland

Chromatic x-y coupling correction at the interaction point was carried out using skew sextupole field created by tilting the sextupole magnets in the SuperKEKB positron ring. Twenty four sextupole magnets are mounted on a tilting table and their tilt angles can be varied form - 30 degree to + 30 degree remotely to control the ratio of the skew to normal sextupole magnetic field components. In the 2021c run, one of the chromatic coupling parameters was varied using different setups of the tilting angles of the 24 sextupole magnets for the first time in a collider. It was found that the emittance growth at the primary (nux-nuy-nus=n) and secondary (nux-nuy-2nus=n) synchro-beta resonance lines can be controlled by tilting the sextupole magnets. Luminosity increase followed after optimizing the chromatic coupling parameters and finding a better tune working point. The study results are summarized in the paper.

Slides TUOZSP2 [19.499 MB]

Cite •

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

TUOZSP3

The European ERL Roadmap

831

A. Hutton
JLab, Newport News, Virginia, USA
M. Klein
The University of Liverpool, Liverpool, United Kingdom
B.C. Kuskepresenter
HZB, Berlin, Germany

Funding: AH supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC05-06OR23177
Following the European Strategy process in 2019, five Roadmap Panels were set up to prepare the technologies needed for future accelerators and colliders: high-field magnets, SRF, muon colliders, plasma wakefield accelerators and Energy Recovery Linacs (ERLs). The ERL Roadmap Panel, consisting of ERL experts from around the world, first developed an overview of current and future ERLs. From this it was possible to carry out a gap analysis to see what R&D would be needed, from which the Roadmap could be developed. The European ERL Roadmap focused on three main aspects: 1) the continuation and development of facility programs for which no additional funds are needed, S-DALINAC in Darmstadt and MESA in Mainz; 2) technology development for room-temperature HOM damping and twin-axis SRF cavities; 3) the timely upgrade of bERLinPro for 100 mA current and the construction of PERLE at Orsay as a dedicated 10 MW power multi-turn facility. The roadmap entails a vision of future energy frontier electron-positron and electron-hadron collider and describes a high quality ERL program for 4.4 K SRF technology at high Q₀. The presentation will address the ERL Roadmap process and result in detail.

Slides TUOZSP3 [2.868 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUOZSP3

About •

Received ※ 02 June 2022 — Revised ※ 17 June 2022 — Accepted ※ 25 June 2022 — Issue date ※ 29 June 2022

Cite •

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