HIAT2022 - List of Keywords (experiment)

Paper	Title	Other Keywords	Page
MO3C2	Establishment of the New Particle Therapy Research Center (PARTREC) at UMCG Groningen	radiation, proton, cyclotron, detector	20
	A. Gerbershagen, L. Barazzuol, S. Both, S. Brandenburg, R.P. Coppes, P.G. Dendooven, B.N. Jones, J.M. Schippers, E.R. Van Der Graaf, P. Van Luijk, M.-J. van Goethem PARTREC, Groningen, The Netherlands
	After 25 years of successful research in the nuclear and radiation physics domain, the KVI-CART research center in Groningen is upgraded and re-established as the PARticle Therapy REsearch Center (PARTREC). Using the superconducting cyclotron AGOR and being embedded within the University Medical Center Groningen, it operates in close collaboration with the Groningen Proton Therapy Center. PARTREC uniquely combines radiation physics, medical physics, biology and radiotherapy research with an R&D program to improve hadron therapy technology and advanced radiation therapy for cancer. A number of further upgrades, scheduled for completion in 2023, will establish a wide range of irradiation modalities, such as pencil beam scanning, shoot-through with high energy protons and SOBP for protons, helium and carbon ions. Delivery of spatial fractionation (GRID) and dose rates over 300 Gy/s (FLASH) are envisioned. In addition, PARTREC delivers a variety of ion beams and infrastructure for radiation hardness experiments conducted by scientific and commercial communities, and nuclear science research in collaboration with the Faculty of Science and Engineering of the University of Groningen.
	Slides MO3C2 [12.702 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO3C2
About •	Received ※ 16 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MO4C3	Development, Fabrication and Testing of the RF-Kicker for the Acculinna-2 Fragment Separator	kicker, cavity, coupling, operation	37
	W. Beeckman, F. Forest, O. Tasset-Maye, E.J. Voisin SIGMAPHI S.A., Vannes, France A. Bechtold NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany A.S. Fomichev, A.V. Gorshkov, S.A. Krupko, G.M. Ter-Akopian JINR/FLNR, Moscow region, Russia
	The Acculinna-2 radioactive beam separator was designed and built between 2012 and 2014, then installed and tested by Sigmaphi in 2015 and in full operation since 2016 at the Flerov laboratory of JINR in Dubna. In order to achieve efficient separation of neutron-deficient species, an RF kicker was foreseen since the beginning of the project but was put on hold for many years. In 2016 Sigmaphi got a contract to study, build, install and test an RF kicker with a variable frequency ranging between 15 and 21 MHz and capable of producing 15kV/cm transverse electric fields in a 10 cm gap over a 1m long distance.# The presentation first recalls the rationale of an RF-kicker to separate neutron-deficient species. It then goes through the different steps of the study, initial choice of the cavity structure, first dimensioning from analytical formulas, finite elements computations and tuning methods envisioned, down to a final preliminary design.# A 1/10 scaled mock-up of this final shape was built and tested as a check before building the full-size cavity. The NTG company was then contracted to perform, in a joint collaboration with Sigmaphi, the final study, detailed design, construction and factory testing of the real cavity. The presentation highlights the fabrication and tests of both mock-up and real size cavities through a series of pictures.# The complete RF-kicker, with its power supply, control and pumping systems was installed on the Acculinna-2 beamline in June 2019. Because the U400M cyclotron was due to shut down by mid-2020, the Acculinna-2 team decided to use the separator to accumulate as much data as possible, to be processed during the 2 years closing time. A 1-week time window for kicker testing was only available in February 2020, a short but sufficient time lapse to successfully drive the cavity at full power and test it over a wide frequency range. Unfortunately, because of cyclotron closure, no beam tests have been performed so far. The latest availabl
	Slides MO4C3 [16.742 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO4C3
About •	Received ※ 26 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 15 September 2022 — Issue date ※ 29 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU1C4	A 3D Printed IH-Type Linac Structure - Proof-of-Concept for Additive Manufacturing of Linac RF Cavities	cavity, vacuum, linac, simulation	41
	H. Hähnel, A. Ateş, U. Ratzinger IAP, Frankfurt am Main, Germany
	Funding: This research was funded by BBMBF grant number 05P21RFRB2. Additive manufacturing ("AM" or "3D printing") has become a powerful tool for rapid prototyping and manufacturing of complex geometries. A 433 MHz IH-DTL cavity has been constructed to act as a proof of concept for additive manufacturing of linac components. In this case, the internal drift tube structure has been produced from 1.4404 stainless steel using 3D printing. We present the concept of the cavity as well as first results of vacuum testing and materials testing. Vacuum levels sufficient for linac operation have been reached with the AM linac structure.
	Slides TU1C4 [5.326 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU1C4
About •	Received ※ 20 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 20 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TU3C3	Preparation of Low-Energy Heavy Ion Beams in a Compact Linear Accelerator/Decelerator	injection, electron, rfq, ion-source	63
	Z. Andelkovic, S. Fedotova, W. Geithner, P. Gerhard, F. Herfurth, I. Kraus, M.T. Maier, A. Reiter, G. Vorobyev GSI, Darmstadt, Germany N.S. Stallkamp IKF, Frankfurt am Main, Germany
	High precision tests of fundamental theories can often unfold their full potential only by using highly charged ions (HCI) at very low energies. Although in light of the envisaged energies at FAIR, experiments in the keV to MeV range may sound like backpedaling, these two techniques are in fact complementary, since the production of heavy HCI is virtually impossible without prior acceleration and electron stripping. However, subsequent preparation, transport, storage and detection of low-energy HCI bring new, surprising sets of problems and limitations. Here we will give an overview of the CRYRING@ESR local injector and the HITRAP linear decelerator. These two facilities consist out of one or two accelerator or decelerator stages, with a total length of around 10 meters, making them "compact" in comparison to other GSI accelerators. The following sections describe their main design parameters, the achieved ion numbers, challenges of beam detection, as well as some special features such as multi-turn injection and single-shot energy analyzers. The conclusion will present the current status and will also give an outlook of the planned applications of low-energy ions at the FAIR facility.
	Slides TU3C3 [3.244 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU3C3
About •	Received ※ 20 June 2022 — Revised ※ 01 July 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP10	High Power Tests of a New 4-Rod RFQ with Focus on Thermal Stability	rfq, operation, controls, MMI	93
	S.R. Wagner, D. Koser, H. Podlech IAP, Frankfurt am Main, Germany M. Basten GSI, Darmstadt, Germany M. Basten HIM, Mainz, Germany H. Podlech HFHF, Frankfurt am Main, Germany
	Due to strong limitations regarding operational stability of the existing HLI-RFQ a new design and prototype were commissioned. Three main problems were observed at the existing RFQ: A strong thermal sensitivity, modulated reflected power, and insufficient stability of the contact springs connecting the stems with the tuning plates. Although the last problem was easily solved, the first two remained and greatly hindered operations. To resolve this issue and ensure stable injection into the HLI, a new RFQ-prototype, optimized in terms of vibration suppression and cooling efficiency, was designed at the Institute of Applied Physics (IAP) of Goethe University Frankfurt. To test the performance of this prototype, high power tests with more than 25 kW/m were performed at GSI. During those, it was possible to demonstrate operational stability in terms of thermal load and mechanical vibrations, calculating the thermal detuning, and proof the reliability of the proposed design.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP10
About •	Received ※ 21 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 30 September 2022 — Issue date ※ 30 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP14	Study of Injection Line of the Cyclotrons C70XP of Arronax	emittance, injection, cyclotron, quadrupole	100
	T. Durand, R. Bellamy, C. Castel, F. Haddad, C. Koumeir, F. Poirier, H. Trichet Cyclotron ARRONAX, Saint-Herblain, France T. Adam, P.G. Graehling, M. Heine, C. Maazouzi, F.R. Osswald IPHC, Strasbourg Cedex 2, France F. Haddad SUBATECH, Nantes, France
	Funding: Work supported by grants from the French National Agency for Research, Arronax-Plus n°ANR-11-EQPX-0004, IRON n°ANR-11-LABX-18-01 and Next n°ANR-16-IDE-0007 and PhD scholarship from the IN2P3/CNRS. The cyclotron C70XP is an accelerator built for the production of non-conventional radionuclides for nuclear medicine, research in physics, radio-chemistry and biology. Its injection section has been designed for 4 types of ions (HH⁺, D-, He2+ & H⁻), 3 types of ions reach the end of the beamline (H⁺, He2+ & D⁺) at the maximum energy of 70 MeV (H⁻ & He2+). It is important that regular and standard runs provide similar beam features with a good emittance quality. An investigation, focused on the beam in the injection, cover beam measurements and potential beam geometry constraints. The beam transverse characteristics in the injection line has been studied with an Allison-type emittance meter and a simple instrumented collimator installed inside the injection line . With these 2 devices, it is scrutinized how the beam emittance evolves as a function of settings of the injection magnets and the source parameters . Dependencies found between the emittance, beam hotspots and tunings are discussed, as well as the protection performed by the collimator. Future of this work with a potential collimator design is introduced. F.Poirier and al., ’The Injection and Chopper-Based System at Arronax C70XP Cyclotron’ **F. Poirier and al., ’Installation, Use and Follow-Up of an Emittance-Meter at the Arronax Cyclotron 70XP’
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP14
About •	Received ※ 21 June 2022 — Revised ※ 27 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP16	Seven Decades of Science with Accelerators at IPHC	neutron, proton, detector, target	104
	F.R. Osswald IPHC, Strasbourg Cedex 2, France
	The Institut Pluridisciplinaire Hubert Curien (IPHC) is a laboratory with solid foundations and perspectives to overcome future challenges. It is a component of the Centre National de Recherche Scientifique (CNRS) and the university of Strasbourg. It has been founded in 2006 after fusion of three local laboratories in the field of ecology/environment, chemistry and subatomic physics. The activities related with subatomic physics presents a rich history which goes back to the 40’s and is now evolving towards new challenges at the frontier of the innovation with the contribution of other sciences as biology, chemistry, medicine and radiotherapy. The paper will recover a number of past and current activities with emphasis on the link between research and technology.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP16
About •	Received ※ 13 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 30 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WE1I3	FRIB Commissioning	linac, target, operation, MMI	118
	P.N. Ostroumov, F. Casagrande, K. Fukushima, K. Hwang, M. Ikegami, T. Kanemura, S.H. Kim, S.M. Lidia, G. Machicoane, T. Maruta, D.G. Morris, A.S. Plastun, H.T. Ren, J. Wei, T. Xu, T. Zhang, Q. Zhao, S. Zhao FRIB, East Lansing, Michigan, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University. The Facility for Rare Isotope Beams (FRIB), a major nuclear physics facility for research with fast, stopped and reaccelerated rare isotope beams, was successfully commissioned and is in operation. The acceleration of Xe, Kr, and Ar ion beams above 210 MeV/u using all 46 cryomodules with 324 superconducting cavities was demonstrated. Several key technologies were successful-ly developed and implemented for the world’s highest energy continuous wave heavy ion beams, such as full-scale cryogenics and superconducting radiofrequency resonator system, stripping of heavy ions with a thin liquid lithium film, and simultaneous acceleration of multiple-charge-state heavy ion beams. In December 2021, we demonstrated the production and identification of 84Se isotopes and, in January 2022, commissioned the FRIB fragment separator by delivering a 210 MeV/u argon beam to the separator’s focal plane. The first two user experiments with primary 48Ca and 82Se beams have been successfully conducted in May-June 2022.
	Slides WE1I3 [6.543 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE1I3
About •	Received ※ 21 June 2022 — Revised ※ 29 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 29 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WE2I1	The New GANIL Beams: Commissioning of SPIRAL 2 Accelerator and Resent Developments	linac, cyclotron, MMI, ion-source	124
	H. Franberg Delahaye GANIL, Caen, France
	The GANIL installation at Caen in France has been operating with warm temperatures cyclotrons for heavy ion beam physics since 1983. The accelerated stables beams widely ranges from Carbon to Uranium beams. Low energy and post accelerated radioactive ion beams are also being provided. The GANIL laboratory has newly increased their different ion beams available with the installation and commissioning of a superconducting linear accelerator ’ SPIRAL 2 and its experimental areas. The construction started in 2011, the first beam was extracted at low energy in late 2014 with pre-acceleration in 2017 and since 2019 the new installation delivers beam for nuclear physics experiments. This paper will cover the commissioning of the SPIRAL 2 installation at GANIL with its superconducting LINAC - but also the latest development of stable and radioactive beams at the cyclotrons.
	Slides WE2I1 [7.801 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE2I1
About •	Received ※ 20 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 25 September 2022 — Issue date ※ 28 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TH1I2	Reinforcement Learning and Bayesian Optimization for Ion Linac Operations	controls, simulation, quadrupole, rfq	130
	J.L. Martinez Marin, B.R. Blomberg, K.J. Bunnell, G.M. Dunn, E. Letcher, B. Mustapha, D. Stanton ANL, Lemont, Illinois, USA
	Funding: This work was supported by the U.S. Department of Energy, under Contract No. DE-AC02-06CH11357. This research used the ATLAS facility, which is a DOE Office of Nuclear Physics User Facility. The use of artificial intelligence can significantly reduce the time needed to tune an accelerator system such as the Argonne Tandem Linear Accelerator System (ATLAS) where a new beam is tuned once or twice a week. After establishing automatic data collection procedures and having analysed the data, machine learning models were developed and tested to tune subsections of the linac. Models based on Reinforcement Learning (RL) and Bayesian Optimization (BO) were developed, their respec-tive results are discussed and compared. RL and BO are well known AI techniques, often used for control systems. The results were obtained for a subsection of ATLAS that contains complex elements such as the radio-frequency quadrupole (RFQ). The models will be later generalized to the whole ATLAS linac, and similar models can be devel-oped for any accelerator with a modern control system.
	Slides TH1I2 [4.617 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TH1I2
About •	Received ※ 09 July 2022 — Revised ※ 10 August 2022 — Accepted ※ 19 September 2022 — Issue date ※ 19 September 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MO3C2

Establishment of the New Particle Therapy Research Center (PARTREC) at UMCG Groningen

radiation, proton, cyclotron, detector

20

A. Gerbershagen, L. Barazzuol, S. Both, S. Brandenburg, R.P. Coppes, P.G. Dendooven, B.N. Jones, J.M. Schippers, E.R. Van Der Graaf, P. Van Luijk, M.-J. van Goethem
PARTREC, Groningen, The Netherlands

After 25 years of successful research in the nuclear and radiation physics domain, the KVI-CART research center in Groningen is upgraded and re-established as the PARticle Therapy REsearch Center (PARTREC). Using the superconducting cyclotron AGOR and being embedded within the University Medical Center Groningen, it operates in close collaboration with the Groningen Proton Therapy Center. PARTREC uniquely combines radiation physics, medical physics, biology and radiotherapy research with an R&D program to improve hadron therapy technology and advanced radiation therapy for cancer. A number of further upgrades, scheduled for completion in 2023, will establish a wide range of irradiation modalities, such as pencil beam scanning, shoot-through with high energy protons and SOBP for protons, helium and carbon ions. Delivery of spatial fractionation (GRID) and dose rates over 300 Gy/s (FLASH) are envisioned. In addition, PARTREC delivers a variety of ion beams and infrastructure for radiation hardness experiments conducted by scientific and commercial communities, and nuclear science research in collaboration with the Faculty of Science and Engineering of the University of Groningen.

Slides MO3C2 [12.702 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO3C2

About •

Received ※ 16 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022

Cite •

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

MO4C3

Development, Fabrication and Testing of the RF-Kicker for the Acculinna-2 Fragment Separator

kicker, cavity, coupling, operation

37

W. Beeckman, F. Forest, O. Tasset-Maye, E.J. Voisin
SIGMAPHI S.A., Vannes, France
A. Bechtold
NTG Neue Technologien GmbH & Co KG, Gelnhausen, Germany
A.S. Fomichev, A.V. Gorshkov, S.A. Krupko, G.M. Ter-Akopian
JINR/FLNR, Moscow region, Russia

The Acculinna-2 radioactive beam separator was designed and built between 2012 and 2014, then installed and tested by Sigmaphi in 2015 and in full operation since 2016 at the Flerov laboratory of JINR in Dubna. In order to achieve efficient separation of neutron-deficient species, an RF kicker was foreseen since the beginning of the project but was put on hold for many years. In 2016 Sigmaphi got a contract to study, build, install and test an RF kicker with a variable frequency ranging between 15 and 21 MHz and capable of producing 15kV/cm transverse electric fields in a 10 cm gap over a 1m long distance.# The presentation first recalls the rationale of an RF-kicker to separate neutron-deficient species. It then goes through the different steps of the study, initial choice of the cavity structure, first dimensioning from analytical formulas, finite elements computations and tuning methods envisioned, down to a final preliminary design.# A 1/10 scaled mock-up of this final shape was built and tested as a check before building the full-size cavity. The NTG company was then contracted to perform, in a joint collaboration with Sigmaphi, the final study, detailed design, construction and factory testing of the real cavity. The presentation highlights the fabrication and tests of both mock-up and real size cavities through a series of pictures.# The complete RF-kicker, with its power supply, control and pumping systems was installed on the Acculinna-2 beamline in June 2019. Because the U400M cyclotron was due to shut down by mid-2020, the Acculinna-2 team decided to use the separator to accumulate as much data as possible, to be processed during the 2 years closing time. A 1-week time window for kicker testing was only available in February 2020, a short but sufficient time lapse to successfully drive the cavity at full power and test it over a wide frequency range. Unfortunately, because of cyclotron closure, no beam tests have been performed so far. The latest availabl

Slides MO4C3 [16.742 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-MO4C3

About •

Received ※ 26 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 15 September 2022 — Issue date ※ 29 September 2022

Cite •

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

TU1C4

A 3D Printed IH-Type Linac Structure - Proof-of-Concept for Additive Manufacturing of Linac RF Cavities

cavity, vacuum, linac, simulation

41

H. Hähnel, A. Ateş, U. Ratzinger
IAP, Frankfurt am Main, Germany

Funding: This research was funded by BBMBF grant number 05P21RFRB2.
Additive manufacturing ("AM" or "3D printing") has become a powerful tool for rapid prototyping and manufacturing of complex geometries. A 433 MHz IH-DTL cavity has been constructed to act as a proof of concept for additive manufacturing of linac components. In this case, the internal drift tube structure has been produced from 1.4404 stainless steel using 3D printing. We present the concept of the cavity as well as first results of vacuum testing and materials testing. Vacuum levels sufficient for linac operation have been reached with the AM linac structure.

Slides TU1C4 [5.326 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU1C4

About •

Received ※ 20 June 2022 — Revised ※ 30 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 20 September 2022

Cite •

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

TU3C3

Preparation of Low-Energy Heavy Ion Beams in a Compact Linear Accelerator/Decelerator

injection, electron, rfq, ion-source

63

Z. Andelkovic, S. Fedotova, W. Geithner, P. Gerhard, F. Herfurth, I. Kraus, M.T. Maier, A. Reiter, G. Vorobyev
GSI, Darmstadt, Germany
N.S. Stallkamp
IKF, Frankfurt am Main, Germany

High precision tests of fundamental theories can often unfold their full potential only by using highly charged ions (HCI) at very low energies. Although in light of the envisaged energies at FAIR, experiments in the keV to MeV range may sound like backpedaling, these two techniques are in fact complementary, since the production of heavy HCI is virtually impossible without prior acceleration and electron stripping. However, subsequent preparation, transport, storage and detection of low-energy HCI bring new, surprising sets of problems and limitations. Here we will give an overview of the CRYRING@ESR local injector and the HITRAP linear decelerator. These two facilities consist out of one or two accelerator or decelerator stages, with a total length of around 10 meters, making them "compact" in comparison to other GSI accelerators. The following sections describe their main design parameters, the achieved ion numbers, challenges of beam detection, as well as some special features such as multi-turn injection and single-shot energy analyzers. The conclusion will present the current status and will also give an outlook of the planned applications of low-energy ions at the FAIR facility.

Slides TU3C3 [3.244 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TU3C3

About •

Received ※ 20 June 2022 — Revised ※ 01 July 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022

Cite •

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

TUP10

High Power Tests of a New 4-Rod RFQ with Focus on Thermal Stability

rfq, operation, controls, MMI

93

S.R. Wagner, D. Koser, H. Podlech
IAP, Frankfurt am Main, Germany
M. Basten
GSI, Darmstadt, Germany
M. Basten
HIM, Mainz, Germany
H. Podlech
HFHF, Frankfurt am Main, Germany

Due to strong limitations regarding operational stability of the existing HLI-RFQ a new design and prototype were commissioned. Three main problems were observed at the existing RFQ: A strong thermal sensitivity, modulated reflected power, and insufficient stability of the contact springs connecting the stems with the tuning plates. Although the last problem was easily solved, the first two remained and greatly hindered operations. To resolve this issue and ensure stable injection into the HLI, a new RFQ-prototype, optimized in terms of vibration suppression and cooling efficiency, was designed at the Institute of Applied Physics (IAP) of Goethe University Frankfurt. To test the performance of this prototype, high power tests with more than 25 kW/m were performed at GSI. During those, it was possible to demonstrate operational stability in terms of thermal load and mechanical vibrations, calculating the thermal detuning, and proof the reliability of the proposed design.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP10

About •

Received ※ 21 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 30 September 2022 — Issue date ※ 30 September 2022

Cite •

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

TUP14

Study of Injection Line of the Cyclotrons C70XP of Arronax

emittance, injection, cyclotron, quadrupole

100

T. Durand, R. Bellamy, C. Castel, F. Haddad, C. Koumeir, F. Poirier, H. Trichet
Cyclotron ARRONAX, Saint-Herblain, France
T. Adam, P.G. Graehling, M. Heine, C. Maazouzi, F.R. Osswald
IPHC, Strasbourg Cedex 2, France
F. Haddad
SUBATECH, Nantes, France

Funding: Work supported by grants from the French National Agency for Research, Arronax-Plus n°ANR-11-EQPX-0004, IRON n°ANR-11-LABX-18-01 and Next n°ANR-16-IDE-0007 and PhD scholarship from the IN2P3/CNRS.
The cyclotron C70XP is an accelerator built for the production of non-conventional radionuclides for nuclear medicine, research in physics, radio-chemistry and biology. Its injection section has been designed for 4 types of ions (HH⁺, D-, He2+ & H⁻), 3 types of ions reach the end of the beamline (H⁺, He2+ & D⁺) at the maximum energy of 70 MeV (H⁻ & He2+). It is important that regular and standard runs provide similar beam features with a good emittance quality. An investigation, focused on the beam in the injection, cover beam measurements and potential beam geometry constraints. The beam transverse characteristics in the injection line has been studied with an Allison-type emittance meter and a simple instrumented collimator installed inside the injection line *. With these 2 devices, it is scrutinized how the beam emittance evolves as a function of settings of the injection magnets and the source parameters **. Dependencies found between the emittance, beam hotspots and tunings are discussed, as well as the protection performed by the collimator. Future of this work with a potential collimator design is introduced.
*F.Poirier and al., ’The Injection and Chopper-Based System at Arronax C70XP Cyclotron’
**F. Poirier and al., ’Installation, Use and Follow-Up of an Emittance-Meter at the Arronax Cyclotron 70XP’

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP14

About •

Received ※ 21 June 2022 — Revised ※ 27 June 2022 — Accepted ※ 01 July 2022 — Issue date ※ 10 August 2022

Cite •

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

TUP16

Seven Decades of Science with Accelerators at IPHC

neutron, proton, detector, target

104

F.R. Osswald
IPHC, Strasbourg Cedex 2, France

The Institut Pluridisciplinaire Hubert Curien (IPHC) is a laboratory with solid foundations and perspectives to overcome future challenges. It is a component of the Centre National de Recherche Scientifique (CNRS) and the university of Strasbourg. It has been founded in 2006 after fusion of three local laboratories in the field of ecology/environment, chemistry and subatomic physics. The activities related with subatomic physics presents a rich history which goes back to the 40’s and is now evolving towards new challenges at the frontier of the innovation with the contribution of other sciences as biology, chemistry, medicine and radiotherapy. The paper will recover a number of past and current activities with emphasis on the link between research and technology.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TUP16

About •

Received ※ 13 June 2022 — Revised ※ 28 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 30 September 2022

Cite •

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

WE1I3

FRIB Commissioning

linac, target, operation, MMI

118

P.N. Ostroumov, F. Casagrande, K. Fukushima, K. Hwang, M. Ikegami, T. Kanemura, S.H. Kim, S.M. Lidia, G. Machicoane, T. Maruta, D.G. Morris, A.S. Plastun, H.T. Ren, J. Wei, T. Xu, T. Zhang, Q. Zhao, S. Zhao
FRIB, East Lansing, Michigan, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661, the State of Michigan and Michigan State University.
The Facility for Rare Isotope Beams (FRIB), a major nuclear physics facility for research with fast, stopped and reaccelerated rare isotope beams, was successfully commissioned and is in operation. The acceleration of Xe, Kr, and Ar ion beams above 210 MeV/u using all 46 cryomodules with 324 superconducting cavities was demonstrated. Several key technologies were successful-ly developed and implemented for the world’s highest energy continuous wave heavy ion beams, such as full-scale cryogenics and superconducting radiofrequency resonator system, stripping of heavy ions with a thin liquid lithium film, and simultaneous acceleration of multiple-charge-state heavy ion beams. In December 2021, we demonstrated the production and identification of 84Se isotopes and, in January 2022, commissioned the FRIB fragment separator by delivering a 210 MeV/u argon beam to the separator’s focal plane. The first two user experiments with primary 48Ca and 82Se beams have been successfully conducted in May-June 2022.

Slides WE1I3 [6.543 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE1I3

About •

Received ※ 21 June 2022 — Revised ※ 29 June 2022 — Accepted ※ 10 August 2022 — Issue date ※ 29 September 2022

Cite •

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

WE2I1

The New GANIL Beams: Commissioning of SPIRAL 2 Accelerator and Resent Developments

linac, cyclotron, MMI, ion-source

124

H. Franberg Delahaye
GANIL, Caen, France

The GANIL installation at Caen in France has been operating with warm temperatures cyclotrons for heavy ion beam physics since 1983. The accelerated stables beams widely ranges from Carbon to Uranium beams. Low energy and post accelerated radioactive ion beams are also being provided. The GANIL laboratory has newly increased their different ion beams available with the installation and commissioning of a superconducting linear accelerator ’ SPIRAL 2 and its experimental areas. The construction started in 2011, the first beam was extracted at low energy in late 2014 with pre-acceleration in 2017 and since 2019 the new installation delivers beam for nuclear physics experiments. This paper will cover the commissioning of the SPIRAL 2 installation at GANIL with its superconducting LINAC - but also the latest development of stable and radioactive beams at the cyclotrons.

Slides WE2I1 [7.801 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-WE2I1

About •

Received ※ 20 June 2022 — Revised ※ 10 August 2022 — Accepted ※ 25 September 2022 — Issue date ※ 28 September 2022

Cite •

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

TH1I2

Reinforcement Learning and Bayesian Optimization for Ion Linac Operations

controls, simulation, quadrupole, rfq

130

J.L. Martinez Marin, B.R. Blomberg, K.J. Bunnell, G.M. Dunn, E. Letcher, B. Mustapha, D. Stanton
ANL, Lemont, Illinois, USA

Funding: This work was supported by the U.S. Department of Energy, under Contract No. DE-AC02-06CH11357. This research used the ATLAS facility, which is a DOE Office of Nuclear Physics User Facility.
The use of artificial intelligence can significantly reduce the time needed to tune an accelerator system such as the Argonne Tandem Linear Accelerator System (ATLAS) where a new beam is tuned once or twice a week. After establishing automatic data collection procedures and having analysed the data, machine learning models were developed and tested to tune subsections of the linac. Models based on Reinforcement Learning (RL) and Bayesian Optimization (BO) were developed, their respec-tive results are discussed and compared. RL and BO are well known AI techniques, often used for control systems. The results were obtained for a subsection of ATLAS that contains complex elements such as the radio-frequency quadrupole (RFQ). The models will be later generalized to the whole ATLAS linac, and similar models can be devel-oped for any accelerator with a modern control system.

Slides TH1I2 [4.617 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-HIAT2022-TH1I2

About •

Received ※ 09 July 2022 — Revised ※ 10 August 2022 — Accepted ※ 19 September 2022 — Issue date ※ 19 September 2022

Cite •

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