HB2023 - Table of Session: MOA4I (Plenary Presentations WGs A-E)

Paper

Title

Page

Design of a Fixed-Field Accelerating Ring for High Power Applications

38

S. Machida
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

A fixed field accelerating ring (FFA) has some advantage to achieve high beam power over conventional ring accelerators. It would be also a sustainable option as future proton drivers. We will discuss the design of an FFA taking a future upgrade plan of ISIS (ISIS-II) as an example.

Slides MOA4I1 [14.313 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-MOA4I1

About •

Received ※ 01 October 2023 — Revised ※ 05 October 2023 — Accepted ※ 15 October 2023 — Issued ※ 21 October 2023

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MOA4I2

Space-charge Limits and Possible Mitigation Approaches in the FAIR Synchrotrons

A. Oeftiger, O. Boine-Frankenheim
GSI, Darmstadt, Germany

To fully exploit the potential of the new Facility for Antiproton and Ion Research (FAIR), the key synchrotrons SIS18 and SIS100 should be operated at the "space charge limit" for light- and heavy-ion beams at a tolerable low beam loss of a few percent per cycle. A detailed 3D tracking model with collective effects (space charge and impedance) has been established including a realistic magnet field error model and the Landau Damping octupoles. The error model for SIS100 is based on precise bench measurements of the main magnets, the one for SIS18 on a novel data-driven beam-based approach named Deep Lie Map Network. Simulations of the full one-second SIS100 accumulation plateau determine the maximum achievable bunch intensity and the corresponding low-loss working point region. Several mitigation approaches have been scrutinised for their impact on the space charge limit: beta-beat correction to suppress the half-integer resonance, bunch flattening via double harmonic RF, and pulsed electron lenses (e-lenses). An optimum configuration for pulsed e-lens operation has been determined, options for additional coherent stabilisation as a Landau damping e-lens are currently studied.

Slides MOA4I2 [3.697 MB]

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MOA4I3

Collective Effects in Lepton Circular Colliders and Synchrotron Light Sources

M. Zobov
LNF-INFN, Frascati, Italy
M. Migliorati
INFN-Roma1, Rome, Italy

In this seminar we discuss differences and similarities in beam dynamics of high current and high brightness beams in lepton and hadron circular accelerators. A particular attention is given to an interplay of different collective phenomena affecting the lepton machine performance.

Slides MOA4I3 [2.914 MB]

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Paper	Title	Page
MOA4I1	Design of a Fixed-Field Accelerating Ring for High Power Applications	38
	S. Machida STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	A fixed field accelerating ring (FFA) has some advantage to achieve high beam power over conventional ring accelerators. It would be also a sustainable option as future proton drivers. We will discuss the design of an FFA taking a future upgrade plan of ISIS (ISIS-II) as an example.
	Slides MOA4I1 [14.313 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-MOA4I1
About •	Received ※ 01 October 2023 — Revised ※ 05 October 2023 — Accepted ※ 15 October 2023 — Issued ※ 21 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOA4I2	Space-charge Limits and Possible Mitigation Approaches in the FAIR Synchrotrons
	A. Oeftiger, O. Boine-Frankenheim GSI, Darmstadt, Germany
	To fully exploit the potential of the new Facility for Antiproton and Ion Research (FAIR), the key synchrotrons SIS18 and SIS100 should be operated at the "space charge limit" for light- and heavy-ion beams at a tolerable low beam loss of a few percent per cycle. A detailed 3D tracking model with collective effects (space charge and impedance) has been established including a realistic magnet field error model and the Landau Damping octupoles. The error model for SIS100 is based on precise bench measurements of the main magnets, the one for SIS18 on a novel data-driven beam-based approach named Deep Lie Map Network. Simulations of the full one-second SIS100 accumulation plateau determine the maximum achievable bunch intensity and the corresponding low-loss working point region. Several mitigation approaches have been scrutinised for their impact on the space charge limit: beta-beat correction to suppress the half-integer resonance, bunch flattening via double harmonic RF, and pulsed electron lenses (e-lenses). An optimum configuration for pulsed e-lens operation has been determined, options for additional coherent stabilisation as a Landau damping e-lens are currently studied.
	Slides MOA4I2 [3.697 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOA4I3	Collective Effects in Lepton Circular Colliders and Synchrotron Light Sources
	M. Zobov LNF-INFN, Frascati, Italy M. Migliorati INFN-Roma1, Rome, Italy
	In this seminar we discuss differences and similarities in beam dynamics of high current and high brightness beams in lepton and hadron circular accelerators. A particular attention is given to an interplay of different collective phenomena affecting the lepton machine performance.
	Slides MOA4I3 [2.914 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)