LINAC2022 - List of Keywords (LEBT)

Paper	Title	Other Keywords	Page
MO1PA02	Beam Commissioning of Normal Conducting Part and Status of ESS Project	MMI, linac, DTL, rfq	18
	R. Miyamoto, C. Amstutz, S. Armanet, R.A. Baron, E.C. Bergman, A.K. Bhattacharyya, B.E. Bolling, W. Borg, S. Calic, M. Carroll, J. Cereijo García, J. Christensson, J.D. Christie, H. Danared, C.S. Derrez, E.M. Donegani, S. Ekström, M. Eriksson, M. Eshraqi, J.F. Esteban Müller, K. Falkland, A. Forsat, S. Gabourin, A. Garcia Sosa, A.A. Gorzawski, V. Grishin, P.O. Gustavsson, S. Haghtalab, V.A. Harahap, H. Hassanzadegan, W. Hees, J.J. Jamróz, A. Jansson, M. Jensen, B. Jones, M. Juni Ferreira, M. Kalafatic, I. Kittelmann, H. Kocevar, S. Kövecses de Carvalho, E. Laface, B. Lagoguez, Y. Levinsen, M. Lindroos, A. Lundmark, M. Mansouri, C. Marrelli, C.A. Martins, J.P.S. Martins, S. Micic, N. Milas, M. Mohammednezhad, R. Montaño, M. Muñoz, G. Mörk, D.J.P. Nicosia, B. Nilsson, D. Noll, A. Nordt, T. Olsson, L. Page, D. Paulic, S. Pavinato, A. Petrushenko, D.C. Plostinar, J. Riegert, A. Rizzo, K.E. Rosengren, K. Rosquist, M. Serluca, T.J. Shea, A. Simelio, S. Slettebak, H. Spoelstra, A.M. Svensson, L. Svensson, R. Tarkeshian, L. Tchelidze, C.A. Thomas, E. Trachanas, K. Vestin, R.H. Zeng, P.L. van Velze, N. Öst ESS, Lund, Sweden C. Baltador, L. Bellan, M. Comunian, F. Grespan, A. Pisent INFN/LNL, Legnaro (PD), Italy I. Bustinduy, A. Conde, D. Fernández-Cañoto, N. Garmendia, P.J. González, G. Harper, A. Kaftoosian, J. Martin, I. Mazkiaran, J.L. Muñoz, A.R. Páramo, S. Varnasseri, A.Z. Zugazaga ESS Bilbao, Zamudio, Spain A.C. Chauveau, P. Hamel, O. Piquet CEA-IRFU, Gif-sur-Yvette, France
	The European Spallation Source, currently under construction in Lund Sweden, will be a spallation neutron source driven by a superconducting proton linac with a design power of 5 MW. The linac features a high peak current of 62.5 mA and long pulse length of 2.86 ms with a repetition rate of 14 Hz. The normal conducting part of the linac has been undergoing beam commissioning in multiple steps, and the main focus of the beam commissioning has been on bringing systems into operation, including auxiliary ones. In 2022, beam was transported to the end of the first tank of the five-tank drift tube linac. This paper provides a summary of the beam commissioning activities at ESS and the current status of the linac.

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	Slides MO1PA02 [18.907 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO1PA02
About •	Received ※ 20 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 21 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOJO08	Upgrade and Commissioning of the 60 keV Low Energy Beam Transport Line for the Frankfurt Neutron Source FRANZ	ion-source, proton, rfq, MMI	352
	H. Hähnel, A. Ateş, G. Blank, M.S. Breidt, D. Bänsch, R. Gössling, T. Metz, H. Podlech, U. Ratzinger, A. Rüffer, K. Volk, C. Wagner IAP, Frankfurt am Main, Germany R.H. Hollinger, C. Zhang GSI, Darmstadt, Germany H. Podlech HFHF, Frankfurt am Main, Germany
	The Low Energy Beam Transport line (LEBT) for the Frankfurt Neutron Source (FRANZ) has been redesigned to accommodate a 60 keV proton beam. Driven by a CHORDIS ion source, operating at 35 kV, a newly designed electrostatic postaccelerator has beeen installed to reach the desired beam energy of 60 keV. Additional upgrades to the beamline include two steerer pairs, several optical diagnostics sections and an additional faraday cup. We present the results of beam commissioning up to the point of RFQ injection. Emittance measurements were performed to prepare matching to the RFQ and improve the beam dynamics model of the low energy beamline. Due to the successful operation of the beamline at 60 keV, retrofitting of the RFQ for the new energy has been initiated.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO08
About •	Received ※ 22 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 05 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOJO12	Development of Emittance Meter Instrument for MYRRHA	emittance, controls, EPICS, radiation	368
	A. Rodríguez Páramo, I. Bustinduy, S. Masa, R. Miracoli, V. Toyos, S. Varnasseri ESS Bilbao, Zamudio, Spain L. De Keukeleere, F. Doucet, A. Ponton, A. Tanquintic SCK•CEN, Mol, Belgium J. Herranz Proactive Research and Development, Sabadell, Spain
	For the commissioning of the Myrrha proton Linac an Emittance Meter Instrument (EMI) has been foreseen. The EMI will be installed in a dedicated test bench for linac commissioning. The test bench will be initially placed after the RFQ with energies of 1.5 MeV, and in later stages moved to other sections of the Normal Con-ducting Linac for operation at 6 and 17 MeV. The Myrrha EMI will be composed by two slit and grid subsystems for measurement of the phase space in the horizontal and vertical directions. For collimating the beam, graphite slits are used, and the beam aperture is measured in the SEM grids placed downstream. Then, the control system performs signal amplification, data acquisition, and motion control, with the different sys-tems integrated in an EPICs IOC. The system, manufactured by ESS-Bilbao and Proac-tive R&D, has been tested on the ESS-Bilbao 45 keV and soon will be integrated in Myrrha facilities. We present the EMI design, with irradiation analysis and emittance reconstruction, and the integration tests results.
	Poster TUPOJO12 [1.141 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO12
About •	Received ※ 19 August 2022 — Revised ※ 30 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 07 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOPA04	First Beam Matching and Transmission Studies on the ESS RFQ	rfq, MMI, emittance, space-charge	414
	D. Noll, R.A. Baron, C.S. Derrez, E.M. Donegani, M. Eshraqi, F. Grespan, H. Hassanzadegan, B. Jones, Y. Levinsen, N. Milas, R. Miyamoto, D.C. Plostinar, A.G. Sosa, R. Zeng ESS, Lund, Sweden A.C. Chauveau, O. Piquet CEA-IRFU, Gif-sur-Yvette, France
	The European Spallation Source will be driven by a 5 MW linear accelerator, producing 2.86 ms long proton beam pulses with a peak current of 62.5 mA at 14 Hz. Following the source commissioning in 2018 and 2019, the RFQ was successfully conditioned and subsequently commissioned with beam in 2021. In this paper, we will present results of studies on beam matching to the RFQ, both for low and high current beam modes, and will compare these results to model predictions.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA04
About •	Received ※ 26 August 2022 — Accepted ※ 05 September 2022 — Issue date ※ 05 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPORI17	Emittance Measurement from the Proton Testbeam at KAHVELab	emittance, simulation, proton, rfq	581
	D. Halis YTU, Istanbul, Turkey S. Aciksoz, E.V. Ozcan Bogazici University, Bebek / Istanbul, Turkey A. Adiguzel, S. Esen, S. Oz Istanbul University, Istanbul, Turkey H. Cetinkaya Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey T.B. Ilhan Bogaziçi University, Kandilli Accelerator, Istanbul, Turkey A. Kilicgedik Marmara University, Istanbul, Turkey S. Ogur Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France G. Unel UCI, Irvine, California, USA
	Funding: This study is supported by Istanbul University Scientific Research Commission Project ID 33250 and TUBITAK Project no : 119M774. A testbeam using a Radio Frequency Quadrupole (RFQ) operating at 800 MHz, to accelerate a 1.5mA proton beam to 2MeV energy has been designed, manufactured and is currently being commissioned at KAHVELab, Istanbul. The beam from the microwave discharge ion source (IS) must be matched to the RFQ via an optimized Low Energy Beam Transport (LEBT) line. The LEBT line consists of two solenoid magnets, two stereer magnets and a beam diagnostics station named MBOX. All the beamline components are locally designed, simulated, manufactured and tested with local resources. The MBOX should be able to measure the beam current and profile, as well as the beam emittance, to ensure an accurate match between IS and RFQ. It includes a number of diagnostic tools: a Faraday Cup, a scintillator screen, and a pepper pot plate (PP). An analysis software is developed and tested for the PP photo analysis. This contribution will present the proton beamline components and will focus on the MBOX measurements, especially on the PP emittance analysis.
	Poster TUPORI17 [5.641 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI17
About •	Received ※ 23 August 2022 — Revised ※ 09 September 2022 — Accepted ※ 26 September 2022 — Issue date ※ 29 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPORI23	Investigation of the Beam Propagation Through the FNAL LEBT	ion-source, linac, emittance, rfq	597
	D.C. Jones, D.S. Bollinger, V.V. Kapin, K. Seiya Fermilab, Batavia, Illinois, USA
	Fermilab Preaccelerator sends 25 mA H⁻ beam with a 30 µs pulse length at 15 Hz. The machine’s uptime was increased in 2012 by the replacement of the Cockcroft Walton accelerator with an RFQ system to take the beam from 35 keV to 750 keV; however, this came with a reduction in transmitted beam between the source and the entrance to Tank 1 of the LINAC. Fermilab currently operates with less than 50% of the beam current from the ion source making it to the entrance of tank 1. In an effort to understand the causes of this reduction in transmission efficiency a vertically movable paddle was installed between the first two solenoids allowing the beam size to be investigated before entering the RFQ. Comparing this data to the emittance measurements done after the first solenoid in the Ion Source R&D lab a more complete picture of the beams propagation through the LEBT has begun to be established when compared with the simulation results. We will present these results here.
	Poster TUPORI23 [0.510 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI23
About •	Received ※ 14 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 15 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPORI29	Space Charge and Electron Confinement in High Current Low Energy Transport Lines: Experience and Simulations From IFMIF/EVEDA and ESS Commissioning	rfq, electron, extraction, ion-source	618
	L. Bellan, M. Comunian, F. Grespan, A. Pisent INFN/LNL, Legnaro (PD), Italy E.M. Donegani, M. Eshraqi, F. Grespan, B. Jones, E. Laface, Y. Levinsen, N. Milas, R. Miyamoto, D. Noll, D.C. Plostinar, A.G. Sosa ESS, Lund, Sweden L. Neri INFN/LNS, Catania, Italy
	The mechanism of space charge compensation given by the residual gas ionization is a key factor for the emittance containment in the low energy beam transport (LEBT) lines of high intensity hadron injectors. A typical front end including a microwave Ion source, a LEBT and Radio Frequency Quadrupole (RFQ), is equipped with two repellers at each interface to prevent electrons from flowing back, to the source, or forward, to the RFQ. In this paper we will emphasize the importance of the ion Source and LEBT repellers on giving the appropriate boundary conditions for the space-charge compensation building-up mechanism. The theory and simulations are supported by experiments performed in the high intensity facility such as ESS and IFMIF/EVEDA.
	Slides TUPORI29 [1.633 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI29
About •	Received ※ 23 August 2022 — Revised ※ 03 September 2022 — Accepted ※ 06 September 2022 — Issue date ※ 15 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPORI19	HSMDIS Performance on the ESS Ion Source	MMI, ion-source, linac, plasma	863
	L. Neri, G. Castro, L. Celona, S. Gammino, O. Leonardi, A. Miraglia INFN/LNS, Catania, Italy C. Baltador, L. Bellan, M. Comunian, F. Grespan INFN/LNL, Legnaro (PD), Italy B. Jones, E. Laface, R. Miyamoto, A.G. Sosa ESS, Lund, Sweden
	The ESS ion source, developed at INFN-LNS and installed at the ESS facility, is fully working and in operation for the linac beam commissioning. The commissioning of the source was done in Catania and in Lund showing high reproducibility related to the beam diagnostic parameters that can be measured with the subset of equipment currently available in Lund. The analysis of the data collected during the commissioning in Catania discloses the possibility to use a new source configuration named High Stability Microwave Discharge Ion Source (HSMDIS), able to improve beam stability and lower the beam emittance. This paper shows the capability to increase the beam current intensity, with preserving beam stability, by changing only the microwave power. Linearity was tested from 10 to 120 mA to be able to provide the lower values needed for the different phases of the accelerator commissioning and higher values for future accelerator development. The source stability is evaluated through intra-pulse stability and pulse-to-pulse stability. Reference: L. Neri, L. Celona "High stability microwave discharge ion sources" Sci Rep 12, 3064 (2022). https://doi.org/10.1038/s41598-022-06937-7
	Slides THPORI19 [37.408 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPORI19
About •	Received ※ 24 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 16 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MO1PA02

Beam Commissioning of Normal Conducting Part and Status of ESS Project

MMI, linac, DTL, rfq

18

R. Miyamoto, C. Amstutz, S. Armanet, R.A. Baron, E.C. Bergman, A.K. Bhattacharyya, B.E. Bolling, W. Borg, S. Calic, M. Carroll, J. Cereijo García, J. Christensson, J.D. Christie, H. Danared, C.S. Derrez, E.M. Donegani, S. Ekström, M. Eriksson, M. Eshraqi, J.F. Esteban Müller, K. Falkland, A. Forsat, S. Gabourin, A. Garcia Sosa, A.A. Gorzawski, V. Grishin, P.O. Gustavsson, S. Haghtalab, V.A. Harahap, H. Hassanzadegan, W. Hees, J.J. Jamróz, A. Jansson, M. Jensen, B. Jones, M. Juni Ferreira, M. Kalafatic, I. Kittelmann, H. Kocevar, S. Kövecses de Carvalho, E. Laface, B. Lagoguez, Y. Levinsen, M. Lindroos, A. Lundmark, M. Mansouri, C. Marrelli, C.A. Martins, J.P.S. Martins, S. Micic, N. Milas, M. Mohammednezhad, R. Montaño, M. Muñoz, G. Mörk, D.J.P. Nicosia, B. Nilsson, D. Noll, A. Nordt, T. Olsson, L. Page, D. Paulic, S. Pavinato, A. Petrushenko, D.C. Plostinar, J. Riegert, A. Rizzo, K.E. Rosengren, K. Rosquist, M. Serluca, T.J. Shea, A. Simelio, S. Slettebak, H. Spoelstra, A.M. Svensson, L. Svensson, R. Tarkeshian, L. Tchelidze, C.A. Thomas, E. Trachanas, K. Vestin, R.H. Zeng, P.L. van Velze, N. Öst
ESS, Lund, Sweden
C. Baltador, L. Bellan, M. Comunian, F. Grespan, A. Pisent
INFN/LNL, Legnaro (PD), Italy
I. Bustinduy, A. Conde, D. Fernández-Cañoto, N. Garmendia, P.J. González, G. Harper, A. Kaftoosian, J. Martin, I. Mazkiaran, J.L. Muñoz, A.R. Páramo, S. Varnasseri, A.Z. Zugazaga
ESS Bilbao, Zamudio, Spain
A.C. Chauveau, P. Hamel, O. Piquet
CEA-IRFU, Gif-sur-Yvette, France

The European Spallation Source, currently under construction in Lund Sweden, will be a spallation neutron source driven by a superconducting proton linac with a design power of 5 MW. The linac features a high peak current of 62.5 mA and long pulse length of 2.86 ms with a repetition rate of 14 Hz. The normal conducting part of the linac has been undergoing beam commissioning in multiple steps, and the main focus of the beam commissioning has been on bringing systems into operation, including auxiliary ones. In 2022, beam was transported to the end of the first tank of the five-tank drift tube linac. This paper provides a summary of the beam commissioning activities at ESS and the current status of the linac.

please see instructions how to view/control embeded videos

Slides MO1PA02 [18.907 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-MO1PA02

About •

Received ※ 20 August 2022 — Revised ※ 27 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 21 September 2022

Cite •

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

TUPOJO08

Upgrade and Commissioning of the 60 keV Low Energy Beam Transport Line for the Frankfurt Neutron Source FRANZ

ion-source, proton, rfq, MMI

352

H. Hähnel, A. Ateş, G. Blank, M.S. Breidt, D. Bänsch, R. Gössling, T. Metz, H. Podlech, U. Ratzinger, A. Rüffer, K. Volk, C. Wagner
IAP, Frankfurt am Main, Germany
R.H. Hollinger, C. Zhang
GSI, Darmstadt, Germany
H. Podlech
HFHF, Frankfurt am Main, Germany

The Low Energy Beam Transport line (LEBT) for the Frankfurt Neutron Source (FRANZ) has been redesigned to accommodate a 60 keV proton beam. Driven by a CHORDIS ion source, operating at 35 kV, a newly designed electrostatic postaccelerator has beeen installed to reach the desired beam energy of 60 keV. Additional upgrades to the beamline include two steerer pairs, several optical diagnostics sections and an additional faraday cup. We present the results of beam commissioning up to the point of RFQ injection. Emittance measurements were performed to prepare matching to the RFQ and improve the beam dynamics model of the low energy beamline. Due to the successful operation of the beamline at 60 keV, retrofitting of the RFQ for the new energy has been initiated.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO08

About •

Received ※ 22 August 2022 — Revised ※ 28 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 05 September 2022

Cite •

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

TUPOJO12

Development of Emittance Meter Instrument for MYRRHA

emittance, controls, EPICS, radiation

368

A. Rodríguez Páramo, I. Bustinduy, S. Masa, R. Miracoli, V. Toyos, S. Varnasseri
ESS Bilbao, Zamudio, Spain
L. De Keukeleere, F. Doucet, A. Ponton, A. Tanquintic
SCK•CEN, Mol, Belgium
J. Herranz
Proactive Research and Development, Sabadell, Spain

For the commissioning of the Myrrha proton Linac an Emittance Meter Instrument (EMI) has been foreseen. The EMI will be installed in a dedicated test bench for linac commissioning. The test bench will be initially placed after the RFQ with energies of 1.5 MeV, and in later stages moved to other sections of the Normal Con-ducting Linac for operation at 6 and 17 MeV. The Myrrha EMI will be composed by two slit and grid subsystems for measurement of the phase space in the horizontal and vertical directions. For collimating the beam, graphite slits are used, and the beam aperture is measured in the SEM grids placed downstream. Then, the control system performs signal amplification, data acquisition, and motion control, with the different sys-tems integrated in an EPICs IOC. The system, manufactured by ESS-Bilbao and Proac-tive R&D, has been tested on the ESS-Bilbao 45 keV and soon will be integrated in Myrrha facilities. We present the EMI design, with irradiation analysis and emittance reconstruction, and the integration tests results.

Poster TUPOJO12 [1.141 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOJO12

About •

Received ※ 19 August 2022 — Revised ※ 30 August 2022 — Accepted ※ 02 September 2022 — Issue date ※ 07 September 2022

Cite •

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

TUPOPA04

First Beam Matching and Transmission Studies on the ESS RFQ

rfq, MMI, emittance, space-charge

414

D. Noll, R.A. Baron, C.S. Derrez, E.M. Donegani, M. Eshraqi, F. Grespan, H. Hassanzadegan, B. Jones, Y. Levinsen, N. Milas, R. Miyamoto, D.C. Plostinar, A.G. Sosa, R. Zeng
ESS, Lund, Sweden
A.C. Chauveau, O. Piquet
CEA-IRFU, Gif-sur-Yvette, France

The European Spallation Source will be driven by a 5 MW linear accelerator, producing 2.86 ms long proton beam pulses with a peak current of 62.5 mA at 14 Hz. Following the source commissioning in 2018 and 2019, the RFQ was successfully conditioned and subsequently commissioned with beam in 2021. In this paper, we will present results of studies on beam matching to the RFQ, both for low and high current beam modes, and will compare these results to model predictions.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPOPA04

About •

Received ※ 26 August 2022 — Accepted ※ 05 September 2022 — Issue date ※ 05 September 2022

Cite •

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

TUPORI17

Emittance Measurement from the Proton Testbeam at KAHVELab

emittance, simulation, proton, rfq

581

D. Halis
YTU, Istanbul, Turkey
S. Aciksoz, E.V. Ozcan
Bogazici University, Bebek / Istanbul, Turkey
A. Adiguzel, S. Esen, S. Oz
Istanbul University, Istanbul, Turkey
H. Cetinkaya
Dumlupinar University, Faculty of Science and Arts, Kutahya, Turkey
T.B. Ilhan
Bogaziçi University, Kandilli Accelerator, Istanbul, Turkey
A. Kilicgedik
Marmara University, Istanbul, Turkey
S. Ogur
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
G. Unel
UCI, Irvine, California, USA

Funding: This study is supported by Istanbul University Scientific Research Commission Project ID 33250 and TUBITAK Project no : 119M774.
A testbeam using a Radio Frequency Quadrupole (RFQ) operating at 800 MHz, to accelerate a 1.5mA proton beam to 2MeV energy has been designed, manufactured and is currently being commissioned at KAHVELab, Istanbul. The beam from the microwave discharge ion source (IS) must be matched to the RFQ via an optimized Low Energy Beam Transport (LEBT) line. The LEBT line consists of two solenoid magnets, two stereer magnets and a beam diagnostics station named MBOX. All the beamline components are locally designed, simulated, manufactured and tested with local resources. The MBOX should be able to measure the beam current and profile, as well as the beam emittance, to ensure an accurate match between IS and RFQ. It includes a number of diagnostic tools: a Faraday Cup, a scintillator screen, and a pepper pot plate (PP). An analysis software is developed and tested for the PP photo analysis. This contribution will present the proton beamline components and will focus on the MBOX measurements, especially on the PP emittance analysis.

Poster TUPORI17 [5.641 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI17

About •

Received ※ 23 August 2022 — Revised ※ 09 September 2022 — Accepted ※ 26 September 2022 — Issue date ※ 29 September 2022

Cite •

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

TUPORI23

Investigation of the Beam Propagation Through the FNAL LEBT

ion-source, linac, emittance, rfq

597

D.C. Jones, D.S. Bollinger, V.V. Kapin, K. Seiya
Fermilab, Batavia, Illinois, USA

Fermilab Preaccelerator sends 25 mA H⁻ beam with a 30 µs pulse length at 15 Hz. The machine’s uptime was increased in 2012 by the replacement of the Cockcroft Walton accelerator with an RFQ system to take the beam from 35 keV to 750 keV; however, this came with a reduction in transmitted beam between the source and the entrance to Tank 1 of the LINAC. Fermilab currently operates with less than 50% of the beam current from the ion source making it to the entrance of tank 1. In an effort to understand the causes of this reduction in transmission efficiency a vertically movable paddle was installed between the first two solenoids allowing the beam size to be investigated before entering the RFQ. Comparing this data to the emittance measurements done after the first solenoid in the Ion Source R&D lab a more complete picture of the beams propagation through the LEBT has begun to be established when compared with the simulation results. We will present these results here.

Poster TUPORI23 [0.510 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI23

About •

Received ※ 14 August 2022 — Revised ※ 19 August 2022 — Accepted ※ 30 August 2022 — Issue date ※ 15 September 2022

Cite •

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

TUPORI29

Space Charge and Electron Confinement in High Current Low Energy Transport Lines: Experience and Simulations From IFMIF/EVEDA and ESS Commissioning

rfq, electron, extraction, ion-source

618

L. Bellan, M. Comunian, F. Grespan, A. Pisent
INFN/LNL, Legnaro (PD), Italy
E.M. Donegani, M. Eshraqi, F. Grespan, B. Jones, E. Laface, Y. Levinsen, N. Milas, R. Miyamoto, D. Noll, D.C. Plostinar, A.G. Sosa
ESS, Lund, Sweden
L. Neri
INFN/LNS, Catania, Italy

The mechanism of space charge compensation given by the residual gas ionization is a key factor for the emittance containment in the low energy beam transport (LEBT) lines of high intensity hadron injectors. A typical front end including a microwave Ion source, a LEBT and Radio Frequency Quadrupole (RFQ), is equipped with two repellers at each interface to prevent electrons from flowing back, to the source, or forward, to the RFQ. In this paper we will emphasize the importance of the ion Source and LEBT repellers on giving the appropriate boundary conditions for the space-charge compensation building-up mechanism. The theory and simulations are supported by experiments performed in the high intensity facility such as ESS and IFMIF/EVEDA.

Slides TUPORI29 [1.633 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-TUPORI29

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Received ※ 23 August 2022 — Revised ※ 03 September 2022 — Accepted ※ 06 September 2022 — Issue date ※ 15 September 2022

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

THPORI19

HSMDIS Performance on the ESS Ion Source

MMI, ion-source, linac, plasma

863

L. Neri, G. Castro, L. Celona, S. Gammino, O. Leonardi, A. Miraglia
INFN/LNS, Catania, Italy
C. Baltador, L. Bellan, M. Comunian, F. Grespan
INFN/LNL, Legnaro (PD), Italy
B. Jones, E. Laface, R. Miyamoto, A.G. Sosa
ESS, Lund, Sweden

The ESS ion source, developed at INFN-LNS and installed at the ESS facility, is fully working and in operation for the linac beam commissioning. The commissioning of the source was done in Catania and in Lund showing high reproducibility related to the beam diagnostic parameters that can be measured with the subset of equipment currently available in Lund. The analysis of the data collected during the commissioning in Catania discloses the possibility to use a new source configuration named High Stability Microwave Discharge Ion Source (HSMDIS), able to improve beam stability and lower the beam emittance. This paper shows the capability to increase the beam current intensity, with preserving beam stability, by changing only the microwave power. Linearity was tested from 10 to 120 mA to be able to provide the lower values needed for the different phases of the accelerator commissioning and higher values for future accelerator development. The source stability is evaluated through intra-pulse stability and pulse-to-pulse stability.
Reference:
L. Neri, L. Celona "High stability microwave discharge ion sources" Sci Rep 12, 3064 (2022). https://doi.org/10.1038/s41598-022-06937-7

Slides THPORI19 [37.408 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2022-THPORI19

About •

Received ※ 24 August 2022 — Revised ※ 29 August 2022 — Accepted ※ 01 September 2022 — Issue date ※ 16 September 2022

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