HB2023 - List of Keywords (LEBT)

Paper	Title	Other Keywords	Page
TUC1C2	The Impact of High-Dimensional Phase Space Correlations on the Beam Dynamics in a Linear Accelerator	rfq, linac, MEBT, simulation	68
	A.M. Hoover, A.V. Aleksandrov, S.M. Cousineau, K.J. Ruisard, A.P. Shishlo, A.P. Zhukov ORNL, Oak Ridge, TN, USA
	Hadron beams develop intensity-dependent transverse-longitudinal correlations within radio-frequency quadrupole (RFQ) accelerating structures. These correlations are only visible in six-dimensional phase space and are destroyed by reconstructions from low-dimensional projections. In this work, we estimate the effect of artificial decorrelation on the beam dynamics in the Spallation Neutron Source (SNS) linac and Beam Test Facility (BTF). We show that the evolution of a realistic initial distribution and its decorrelated twin converge during the early acceleration stages; thus, low-dimensional projections are probably sufficient for detailed predictions in high-power linacs.
	Slides TUC1C2 [6.573 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-TUC1C2
About •	Received ※ 01 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 13 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUA3I3	ESS Normal Conducting Linac Commissioning Results	MMI, DTL, MEBT, linac	118
	Y. Levinsen, M.E. Eshraqi, N. Milas, R. Miyamoto, D. Noll ESS, Lund, Sweden
	The European Spallation Source is designed to be the world’s brightest neutron source once in operation, driven by a 5 MW proton linac. The linac consists of a normal conducting front end followed by a superconducting linac. The normal conducting part has been commissioned in several stages, with the latest stage involving all but one DTL tank now in 2023. During this commissioning period, we successfully transported a 50 us pulse of the nominal 62.5 mA beam current. We will present an overview of the commissioning results, with a focus on what we achieved in this latest stage.
	Slides TUA3I3 [31.400 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA3I3
About •	Received ※ 04 October 2023 — Revised ※ 11 October 2023 — Accepted ※ 13 October 2023 — Issued ※ 15 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THBP08	Simulation Studies on the Low Energy Beam Transfer (LEBT) System of the ISIS Neutron Spallation Source	ion-source, rfq, solenoid, space-charge	454
	S.A. Ahmadiannamin, D.C. Faircloth, S.R. Lawrie, A.P. Letchford, T.M. Sarmento, O.A. Tarvainen STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	The transmission efficiency and beam dynamic parameters of the low-energy beam transfer (LEBT) section of proton accelerators, serving as a neutron spallation source, have a critical impact on beam loss in subsequent sections of the linear accelerator. Due to variations and mismatches, the beam parameters at the entrance of the radio-frequency quadrupole (RFQ) change, significantly affecting the transmission efficiency of the RFQ and the matching between RFQ and drift tube linac (DTL) structures. Recognizing the importance of this concept, particle-in-cell studies were conducted to optimize the LEBT section of the ISIS accelerator. This study presents the results of simulations.
	Poster THBP08 [1.081 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP08
About •	Received ※ 01 October 2023 — Revised ※ 05 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 30 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRA1I1	Status of the IOTA Proton Injector	proton, rfq, electron, MEBT	629
	D.R. Edstrom, D.R. Broemmelsiek, K. Carlson, J.-P. Carneiro, H. Piekarz, A.L. Romanov, A.V. Shemyakin, A. Valishev Fermilab, Batavia, Illinois, USA
	Funding: This work has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. The IOTA Proton Injector (IPI), currently under installation at the Fermilab Accelerator Science and Technology facility, is a beamline capable of delivering 20-mA pulses of protons at 2.5 MeV to the Integrable Optics Test Accelerator (IOTA) ring. First beam in the IPI beamline is anticipated in 2023, when it will operate alongside the existing electron injector beamline to facilitate further fundamental physics research and continued development of novel accelerator technologies in the IOTA ring. This report details the expected operational profile, known challenges, and the current state of installation.
	Slides FRA1I1 [6.466 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-FRA1I1
About •	Received ※ 08 October 2023 — Revised ※ 09 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 11 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

FRC1I1	The Beam Destinations for the Commissioning of the ESS High Power Normal Conducting Linac	DTL, proton, MMI, linac	643
	E.M. Donegani, V. Grishin, E. Laface, C. Neto, A. Olsson, L. Page, T.J. Shea ESS, Lund, Sweden V.V. Bertrand PANTECHNIK, Bayeux, France I. Bustinduy ESS Bilbao, Zamudio, Spain M. Ruelas RadiaBeam, Santa Monica, California, USA
	At the European Spallation Source (ESS) in Lund (Sweden), the commissioning of the high-power normal conducting linac started in 2018. This paper deals with the beam destinations for the commissioning phases with initially the proton source and LEBT, then the MEBT and lately four DTL sections. The beam destinations were designed to withstand the ESS commissioning beam modes (with proton current up to 62.5mA, pulse length up to 50E-6s and repetition rates up to 14Hz). The EPICS-based control system allows measurements of the proton current and pulse length in real-time; it controls the motion and the power suppliers, and it also monitors the water cooling systems. Special focus will be on the results of thermo-mechanical simulations in MCNP/ANSYS to ensure safe absorption and dissipation of the volumetric power-deposition. The devices’ materials were chosen not only to cope with the high-power proton-beam, but also to be vacuum-compatible, to minimize the activation of the beam destinations themselves and the residual dose nearby. The results of neutronics simulations will be summarized with special focus on the shielding strategy, the operational limits and relocation procedures.
	Slides FRC1I1 [6.348 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-HB2023-FRC1I1
About •	Received ※ 29 September 2023 — Revised ※ 07 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 13 October 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUC1C2

The Impact of High-Dimensional Phase Space Correlations on the Beam Dynamics in a Linear Accelerator

rfq, linac, MEBT, simulation

68

A.M. Hoover, A.V. Aleksandrov, S.M. Cousineau, K.J. Ruisard, A.P. Shishlo, A.P. Zhukov
ORNL, Oak Ridge, TN, USA

Hadron beams develop intensity-dependent transverse-longitudinal correlations within radio-frequency quadrupole (RFQ) accelerating structures. These correlations are only visible in six-dimensional phase space and are destroyed by reconstructions from low-dimensional projections. In this work, we estimate the effect of artificial decorrelation on the beam dynamics in the Spallation Neutron Source (SNS) linac and Beam Test Facility (BTF). We show that the evolution of a realistic initial distribution and its decorrelated twin converge during the early acceleration stages; thus, low-dimensional projections are probably sufficient for detailed predictions in high-power linacs.

Slides TUC1C2 [6.573 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-TUC1C2

About •

Received ※ 01 October 2023 — Revised ※ 06 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 13 October 2023

Cite •

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

TUA3I3

ESS Normal Conducting Linac Commissioning Results

MMI, DTL, MEBT, linac

118

Y. Levinsen, M.E. Eshraqi, N. Milas, R. Miyamoto, D. Noll
ESS, Lund, Sweden

The European Spallation Source is designed to be the world’s brightest neutron source once in operation, driven by a 5 MW proton linac. The linac consists of a normal conducting front end followed by a superconducting linac. The normal conducting part has been commissioned in several stages, with the latest stage involving all but one DTL tank now in 2023. During this commissioning period, we successfully transported a 50 us pulse of the nominal 62.5 mA beam current. We will present an overview of the commissioning results, with a focus on what we achieved in this latest stage.

Slides TUA3I3 [31.400 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-TUA3I3

About •

Received ※ 04 October 2023 — Revised ※ 11 October 2023 — Accepted ※ 13 October 2023 — Issued ※ 15 October 2023

Cite •

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

THBP08

Simulation Studies on the Low Energy Beam Transfer (LEBT) System of the ISIS Neutron Spallation Source

ion-source, rfq, solenoid, space-charge

454

S.A. Ahmadiannamin, D.C. Faircloth, S.R. Lawrie, A.P. Letchford, T.M. Sarmento, O.A. Tarvainen
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

The transmission efficiency and beam dynamic parameters of the low-energy beam transfer (LEBT) section of proton accelerators, serving as a neutron spallation source, have a critical impact on beam loss in subsequent sections of the linear accelerator. Due to variations and mismatches, the beam parameters at the entrance of the radio-frequency quadrupole (RFQ) change, significantly affecting the transmission efficiency of the RFQ and the matching between RFQ and drift tube linac (DTL) structures. Recognizing the importance of this concept, particle-in-cell studies were conducted to optimize the LEBT section of the ISIS accelerator. This study presents the results of simulations.

Poster THBP08 [1.081 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-THBP08

About •

Received ※ 01 October 2023 — Revised ※ 05 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 30 October 2023

Cite •

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

FRA1I1

Status of the IOTA Proton Injector

proton, rfq, electron, MEBT

629

D.R. Edstrom, D.R. Broemmelsiek, K. Carlson, J.-P. Carneiro, H. Piekarz, A.L. Romanov, A.V. Shemyakin, A. Valishev
Fermilab, Batavia, Illinois, USA

Funding: This work has been authored by Fermi Research Alliance, LLC under Contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics.
The IOTA Proton Injector (IPI), currently under installation at the Fermilab Accelerator Science and Technology facility, is a beamline capable of delivering 20-mA pulses of protons at 2.5 MeV to the Integrable Optics Test Accelerator (IOTA) ring. First beam in the IPI beamline is anticipated in 2023, when it will operate alongside the existing electron injector beamline to facilitate further fundamental physics research and continued development of novel accelerator technologies in the IOTA ring. This report details the expected operational profile, known challenges, and the current state of installation.

Slides FRA1I1 [6.466 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-FRA1I1

About •

Received ※ 08 October 2023 — Revised ※ 09 October 2023 — Accepted ※ 11 October 2023 — Issued ※ 11 October 2023

Cite •

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

FRC1I1

The Beam Destinations for the Commissioning of the ESS High Power Normal Conducting Linac

DTL, proton, MMI, linac

643

E.M. Donegani, V. Grishin, E. Laface, C. Neto, A. Olsson, L. Page, T.J. Shea
ESS, Lund, Sweden
V.V. Bertrand
PANTECHNIK, Bayeux, France
I. Bustinduy
ESS Bilbao, Zamudio, Spain
M. Ruelas
RadiaBeam, Santa Monica, California, USA

At the European Spallation Source (ESS) in Lund (Sweden), the commissioning of the high-power normal conducting linac started in 2018. This paper deals with the beam destinations for the commissioning phases with initially the proton source and LEBT, then the MEBT and lately four DTL sections. The beam destinations were designed to withstand the ESS commissioning beam modes (with proton current up to 62.5mA, pulse length up to 50E-6s and repetition rates up to 14Hz). The EPICS-based control system allows measurements of the proton current and pulse length in real-time; it controls the motion and the power suppliers, and it also monitors the water cooling systems. Special focus will be on the results of thermo-mechanical simulations in MCNP/ANSYS to ensure safe absorption and dissipation of the volumetric power-deposition. The devices’ materials were chosen not only to cope with the high-power proton-beam, but also to be vacuum-compatible, to minimize the activation of the beam destinations themselves and the residual dose nearby. The results of neutronics simulations will be summarized with special focus on the shielding strategy, the operational limits and relocation procedures.

Slides FRC1I1 [6.348 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-HB2023-FRC1I1

About •

Received ※ 29 September 2023 — Revised ※ 07 October 2023 — Accepted ※ 10 October 2023 — Issued ※ 13 October 2023

Cite •

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