LINAC2022 - List of Authors (Apsimon, R.)

Paper	Title	Page
TUPORI19	Beam Dynamics Framework Incorporating Acceleration Used to Define the Minimum Aperture of RF Cavity For FODO-like Focusing Scheme for Proton Radiotherapy Linac	589
SUPCRI04	use link to see paper's listing under its alternate paper code
	M.J.W. Southerby, R. Apsimon Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
	Funding: Supported by the Cockcroft Institute Core Grant, ST/P002056/1. In this paper, we present a generalised analytical framework for beam dynamics studies and lattice designs, while incorporating longitudinal acceleration of bunches of charged particles. We study a ’FODO-like’ scheme, whereby we have an alternating array of focusing and defocusing quadrupoles and study how this differs from a standard FODO lattice due to acceleration. We present optimisation techniques to provide quadrupole parameters, cavity lengths, and required drift lengths under different constraints.
	Poster TUPORI19 [0.997 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI19
About •	Received ※ 23 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 01 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPORI20	The Impact of Beam Loading Transients on the RF System and Beam Breakup Instabilities in Energy Recovery Linacs	593
	S. Setiniyaz Lancaster University, Lancaster, United Kingdom R. Apsimon, M.J.W. Southerby Cockcroft Institute, Lancaster University, Lancaster, United Kingdom P.H. Williams STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom
	In multi-turn Energy Recovery Linacs (ERLs), the filling pattern describes the order that which bunches are injected into the ERL ring. The filling patterns and recombination schemes together can create various beam loading patterns/transients, which can have a big impact on the RF system, namely the cavity fundamental mode voltage, required RF power, and beam breakup instability. In this work, we demonstrate one can lower the cavity voltage fluctuation and rf power consumption by carefully choosing the right transient by using an analytical model and simulation.
	Poster TUPORI20 [0.659 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI20
About •	Received ※ 19 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 31 August 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WE2AA02	RELIEF: Tanning of Leather with e-beam	645
	R. Apsimon, D.A. Turner Cockcroft Institute, Lancaster University, Lancaster, United Kingdom K.A. Dewhurst CERN, Meyrin, Switzerland S. Setiniyaz Lancaster University, Lancaster, United Kingdom R. Seviour University of Huddersfield, Huddersfield, United Kingdom W.R. Wise University of Northampton, Northampton, United Kingdom
	Funding: STFC through the grant reference ST/S002189/1, and the Cockcroft Institute core grant, STFC grant reference ST/P002056/1. Tanning of leather for clothing, shoes and handbags uses potentially harmful chemicals that are often run off into local water supplies or require a large carbon footprint to safely recover these pollutants. In regions of the world with significant leather production this can lead to a significant environmental impact. However recent studies have suggested that leather can instead be tanned using a combination of electron beams in a process inspired by the industrial crosslinking of polymers, to drastically reduce the quantity of wastewater produced in the process; thereby resulting in a reduced environmental impact as well as potential cost savings on wastewater treatment. In this talk, initial studies of leather tanning will be presented as well as accelerator designs for use in leather irradiation.

	please see instructions how to view/control embeded videos
	Slides WE2AA02 [1.803 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-WE2AA02
About •	Received ※ 02 August 2022 — Revised ※ 16 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 16 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Beam Dynamics Framework Incorporating Acceleration Used to Define the Minimum Aperture of RF Cavity For FODO-like Focusing Scheme for Proton Radiotherapy Linac

589

SUPCRI04

use link to see paper's listing under its alternate paper code

M.J.W. Southerby, R. Apsimon
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom

Funding: Supported by the Cockcroft Institute Core Grant, ST/P002056/1.
In this paper, we present a generalised analytical framework for beam dynamics studies and lattice designs, while incorporating longitudinal acceleration of bunches of charged particles. We study a ’FODO-like’ scheme, whereby we have an alternating array of focusing and defocusing quadrupoles and study how this differs from a standard FODO lattice due to acceleration. We present optimisation techniques to provide quadrupole parameters, cavity lengths, and required drift lengths under different constraints.

Poster TUPORI19 [0.997 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI19

About •

Received ※ 23 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 01 September 2022

Cite •

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

TUPORI20

The Impact of Beam Loading Transients on the RF System and Beam Breakup Instabilities in Energy Recovery Linacs

593

S. Setiniyaz
Lancaster University, Lancaster, United Kingdom
R. Apsimon, M.J.W. Southerby
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
P.H. Williams
STFC/DL/ASTeC, Daresbury, Warrington, Cheshire, United Kingdom

In multi-turn Energy Recovery Linacs (ERLs), the filling pattern describes the order that which bunches are injected into the ERL ring. The filling patterns and recombination schemes together can create various beam loading patterns/transients, which can have a big impact on the RF system, namely the cavity fundamental mode voltage, required RF power, and beam breakup instability. In this work, we demonstrate one can lower the cavity voltage fluctuation and rf power consumption by carefully choosing the right transient by using an analytical model and simulation.

Poster TUPORI20 [0.659 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI20

About •

Received ※ 19 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 29 August 2022 — Issue date ※ 31 August 2022

Cite •

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

WE2AA02

RELIEF: Tanning of Leather with e-beam

645

R. Apsimon, D.A. Turner
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
K.A. Dewhurst
CERN, Meyrin, Switzerland
S. Setiniyaz
Lancaster University, Lancaster, United Kingdom
R. Seviour
University of Huddersfield, Huddersfield, United Kingdom
W.R. Wise
University of Northampton, Northampton, United Kingdom

Funding: STFC through the grant reference ST/S002189/1, and the Cockcroft Institute core grant, STFC grant reference ST/P002056/1.
Tanning of leather for clothing, shoes and handbags uses potentially harmful chemicals that are often run off into local water supplies or require a large carbon footprint to safely recover these pollutants. In regions of the world with significant leather production this can lead to a significant environmental impact. However recent studies have suggested that leather can instead be tanned using a combination of electron beams in a process inspired by the industrial crosslinking of polymers, to drastically reduce the quantity of wastewater produced in the process; thereby resulting in a reduced environmental impact as well as potential cost savings on wastewater treatment. In this talk, initial studies of leather tanning will be presented as well as accelerator designs for use in leather irradiation.

please see instructions how to view/control embeded videos

Slides WE2AA02 [1.803 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-WE2AA02

About •

Received ※ 02 August 2022 — Revised ※ 16 August 2022 — Accepted ※ 31 August 2022 — Issue date ※ 16 September 2022

Cite •

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