FLS2023 - List of Authors (Militsyn, B.L.)

Paper	Title	Page
TU4P13	An Introduction to the UK XFEL Conceptual Design and Options Analysis	103
	D.J. Dunning, D. Angal-Kalinin, J.A. Clarke, J. Henderson, S.L. Mathisen, B.L. Militsyn, M.D. Roper, E.W. Snedden, N. Thompson, D.A. Walsh, P.H. Williams STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom P. Aden, B.D. Fell STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom D. Angal-Kalinin, J.A. Clarke, D.J. Dunning, J. Henderson, B.L. Militsyn, N. Thompson, P.H. Williams Cockcroft Institute, Warrington, Cheshire, United Kingdom J.L. Collier, J.S. Green STFC/RAL, Chilton, Didcot, Oxon, United Kingdom J.P. Marangos Imperial College of Science and Technology, Department of Physics, London, United Kingdom
	In October 2022, the UK XFEL project entered a new phase to explore how best to deliver the advanced XFEL capabilities identified in the project’s Science Case. This phase includes developing a conceptual design for a unique new machine to fulfil the required capabilities and more. It also examines the possibility of investment opportunities at existing XFELs to deliver the same aims, and a comparison of the various options will be made. The desired next-generation capabilities include transform-limited operation across the entire X-ray range with pulse durations ranging from 100 as to 100 fs; evenly spaced high rep. rate pulses for enhanced data acquisition rates; optimised multi-colour FEL pulse delivery and a full array of synchronised sources (XUV-THz sources, electron beams and high power/high energy lasers). The project also incorporates sustainability as a key criteria. This contribution gives an overview of progress to date and future plans.
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P13
About •	Received ※ 23 August 2023 — Revised ※ 25 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU3D5	Electron RF Injectors for Next Generation FELs
	B.L. Militsyn STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	A modern trend in the next generation of X-ray Free Electron Lasers (FEL) is the development of tools for the investigation of dynamic processes on the (sub)atomic scale that requires photon beams with energies of 20-25 keV with a repetition rate of 1 MHz or higher. At reasonable energies of the drive linac of 8-10 GeV optimum FEL performance requires an electron beam with emittance of 0.1 mm.mrad or lower. Higher value of the emittance leads to essential degradation in FEL performance and significant increase in required undulator length. In this work we try to estimate the ultimate beam brightness and bunch repetition rate that may be achieved with existing electron injector technologies and outline possible ways of obtaining beams with the parameters required for future FELs. In particular, we will discuss possible injector designs for the ongoing UK XFEL project.
	Slides TU3D5 [3.260 MB]
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TU4P12	Injection Into XFELs, a Review of Trends and Challenges	99
	C. Davut UMAN, Manchester, United Kingdom Ö. Apsimon Cockcroft Institute, Warrington, Cheshire, United Kingdom B.L. Militsyn, S.S. Percival STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	Funding: Science and Technology Facilities Council, STFC In this contribution, we review the low-energy electron injectors for existing X-ray Free-Electron Laser (XFEL) facilities focusing on the buncher and booster sections. The technology choices are parallel to the increasing demand for stricter six-dimensional phase space quality. The current capability for beam parameters and future requirements are laid out alongside a discussion on challenges and technological bottlenecks. In light of this review, preliminary results for a high capability injector providing high repetition rate, and continuous wave emission is presented as an option for the UK XFEL.
DOI •	reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P12
About •	Received ※ 23 August 2023 — Revised ※ 24 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

An Introduction to the UK XFEL Conceptual Design and Options Analysis

103

D.J. Dunning, D. Angal-Kalinin, J.A. Clarke, J. Henderson, S.L. Mathisen, B.L. Militsyn, M.D. Roper, E.W. Snedden, N. Thompson, D.A. Walsh, P.H. Williams
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
P. Aden, B.D. Fell
STFC/DL, Daresbury, Warrington, Cheshire, United Kingdom
D. Angal-Kalinin, J.A. Clarke, D.J. Dunning, J. Henderson, B.L. Militsyn, N. Thompson, P.H. Williams
Cockcroft Institute, Warrington, Cheshire, United Kingdom
J.L. Collier, J.S. Green
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
J.P. Marangos
Imperial College of Science and Technology, Department of Physics, London, United Kingdom

In October 2022, the UK XFEL project entered a new phase to explore how best to deliver the advanced XFEL capabilities identified in the project’s Science Case. This phase includes developing a conceptual design for a unique new machine to fulfil the required capabilities and more. It also examines the possibility of investment opportunities at existing XFELs to deliver the same aims, and a comparison of the various options will be made. The desired next-generation capabilities include transform-limited operation across the entire X-ray range with pulse durations ranging from 100 as to 100 fs; evenly spaced high rep. rate pulses for enhanced data acquisition rates; optimised multi-colour FEL pulse delivery and a full array of synchronised sources (XUV-THz sources, electron beams and high power/high energy lasers). The project also incorporates sustainability as a key criteria. This contribution gives an overview of progress to date and future plans.

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P13

About •

Received ※ 23 August 2023 — Revised ※ 25 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023

Cite •

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

TU3D5

Electron RF Injectors for Next Generation FELs

B.L. Militsyn
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

A modern trend in the next generation of X-ray Free Electron Lasers (FEL) is the development of tools for the investigation of dynamic processes on the (sub)atomic scale that requires photon beams with energies of 20-25 keV with a repetition rate of 1 MHz or higher. At reasonable energies of the drive linac of 8-10 GeV optimum FEL performance requires an electron beam with emittance of 0.1 mm.mrad or lower. Higher value of the emittance leads to essential degradation in FEL performance and significant increase in required undulator length. In this work we try to estimate the ultimate beam brightness and bunch repetition rate that may be achieved with existing electron injector technologies and outline possible ways of obtaining beams with the parameters required for future FELs. In particular, we will discuss possible injector designs for the ongoing UK XFEL project.

Slides TU3D5 [3.260 MB]

Cite •

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

TU4P12

Injection Into XFELs, a Review of Trends and Challenges

99

C. Davut
UMAN, Manchester, United Kingdom
Ö. Apsimon
Cockcroft Institute, Warrington, Cheshire, United Kingdom
B.L. Militsyn, S.S. Percival
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

Funding: Science and Technology Facilities Council, STFC
In this contribution, we review the low-energy electron injectors for existing X-ray Free-Electron Laser (XFEL) facilities focusing on the buncher and booster sections. The technology choices are parallel to the increasing demand for stricter six-dimensional phase space quality. The current capability for beam parameters and future requirements are laid out alongside a discussion on challenges and technological bottlenecks. In light of this review, preliminary results for a high capability injector providing high repetition rate, and continuous wave emission is presented as an option for the UK XFEL.

DOI •

reference for this paper ※ doi:10.18429/JACoW-FLS2023-TU4P12

About •

Received ※ 23 August 2023 — Revised ※ 24 August 2023 — Accepted ※ 30 August 2023 — Issued ※ 02 December 2023

Cite •

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