IPAC2021 - List of Authors (Podlech, H.)

Paper	Title	Page
MOPAB192	LILac Energy Upgrade to 13 MeV	651
	B. Koubek, S. Altürk, M. Busch, H. Höltermann, J.D. Kaiser, H. Podlech, U. Ratzinger, M. Schuett, M. Schwarz, W. Schweizer, D. Strehl, R. Tiede, C. Trageser BEVATECH, Frankfurt, Germany A. Brunzel, P. Nonn, H. Schlarb DESY, Hamburg, Germany A.V. Butenko, D.E. Donets, B.V. Golovenskiy, A. Govorov, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.A. Monchinsky, D.O. Ponkin, K.V. Shevchenko, I.V. Shirikov, E. Syresin JINR, Dubna, Moscow Region, Russia
	In the frame of the NICA (Nuclotron-based Ion Collider fAcility) ion collider upgrade a new light ion LINAC for protons and ions will be built in collaboration between JINR and BEVATECH GmbH. While ions with a mass-to-charge ratio up to 3 will be fed into the NUCLOTRON ring with an energy of 7 MeV/u, protons are supposed to be accelerated up to an energy of 13 MeV using a third IH structure. This energy upgrade comprises a third IH structure, a dual-use Debuncher cavity as well as an extension of the LLRF control system built on MicroTCA technology.
	Poster MOPAB192 [4.914 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB192
About •	paper received ※ 11 May 2021 paper accepted ※ 31 May 2021 issue date ※ 20 August 2021
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WEPAB176	Acceleration of He⁺ Beams for Injection Into NICA Booster During its First Run	3016
	K.A. Levterov, V.P. Akimov, D.S. Letkin, D.O. Leushin, V.V. Mialkovskiy JINR/VBLHEP, Dubna, Moscow region, Russia A.M. Bazanov, A.V. Butenko, D.E. Donets, D. Egorov, A.R. Galimov, B.V. Golovenskiy, A. Govorov, V.V. Kobets, A.D. Kovalenko, D.A. Lyuosev, A.A. Martynov, V.A. Monchinsky, D.O. Ponkin, I.V. Shirikov, A.O. Sidorin, E. Syresin, G.V. Trubnikov, A. Tuzikov JINR, Dubna, Moscow Region, Russia H. Höltermann, H. Podlech BEVATECH, Frankfurt, Germany U. Ratzinger, A. Schempp IAP, Frankfurt am Main, Germany
	Heavy Ion Linear Accelerator (HILAC) is designed to accelerate the heavy ions with ratio A/Z<=6.25 produced by ESIS ion source up to the 3.2 MeV for the injection into superconducting synchrotron (SC) Booster. HILAC was commissioned in 2018 using the carbon beams from Laser Ion Source (LIS). The project output energy was verified. Transmission could be estimated only for DTL structure because of the presence at the RFQ input the mixture of ions with different charge states extracted from laser-plasma. To estimate transmission through the whole linac the ion source producing the only species He⁺ was designed. The beams of He⁺ ions were used for the first run of SC Booster. The design of the helium ion source and results of the He⁺ beam acceleration and injection are described.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB176
About •	paper received ※ 19 May 2021 paper accepted ※ 11 June 2021 issue date ※ 22 August 2021
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WEPAB202	Thermal Analysis of a Compact Split-Coaxial CW RFQ for the IsoDAR RFQ-DIP	3097
	D. Koser, J.M. Conrad, D. Winklehner MIT, Cambridge, Massachusetts, USA H. Podlech, U. Ratzinger, M. Schuett BEVATECH, Frankfurt, Germany
	The RFQ direct injection project (RFQ-DIP) for the neutrino physics experiment IsoDAR aims at an efficient injection of a high-current H²⁺ beam into the dedicated 60 MeV driver cyclotron. Therefore, it is intended to use a compact 32.8 MHz RFQ structure of the split-coaxial type as a pre-buncher. To determine the thermal elongation of the 1.4 m long electrode rods as well as the thermal frequency detuning of the RF structure at a maximum nominal power load of 3.6 kW, an extensive thermal and structural mechanical analysis using COMSOL Multiphysics was conducted. The water heating along the cooling channels as well as the properties of heat transfer from the copper structure to the cooling water were taken into account, which required CFD simulations of the cooling water flow in the turbulent regime. Here we present the methods and results of the sophisticated thermal and structural mechanical simulations using COMSOL and provide a comparison to more simplistic simulations conducted with CST Studio Suite.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB202
About •	paper received ※ 20 May 2021 paper accepted ※ 01 July 2021 issue date ※ 14 August 2021
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THPAB167	Technical Design of an RFQ Injector for the IsoDAR Cyclotron	4075
	H. Höltermann, D. Koser, B. Koubek, H. Podlech, U. Ratzinger, M. Schuett, M. Syha BEVATECH, Frankfurt, Germany J.M. Conrad, J. Smolsky, L.H. Waites, D. Winklehner MIT, Cambridge, Massachusetts, USA
	For the IsoDAR (Isotope Decay-At-Rest) experiment, a high intensity (10 mA CW) primary proton beam is needed. To generate this beam, H²⁺ is accelerated in a cyclotron and stripped into protons after extraction. An RFQ, partially embedded in the cyclotron yoke, will be used to bunch and axially inject H²⁺ ions into the main accelerator. The strong RFQ bunching capabilities will be used to optimize the overall injection efficiency. To keep the setup compact the distance between the ion source and RFQ can be kept very short as well. In this paper, we describe the technical design of the RFQ. We focus on two critical aspects: 1. The use of a split-coaxial structure, necessitated by the low frequency of 32.8 MHz (matching the cyclotron RF) and the desired small tank diameter; 2. The high current, CW operation, requiring a good cooling concept for the RFQ tank and vanes.
	Poster THPAB167 [2.162 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB167
About •	paper received ※ 14 May 2021 paper accepted ※ 27 July 2021 issue date ※ 21 August 2021
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MOPAB205	Minerva (MYRRHA Phase 1) RFQ Beam Commissioning	675
	A. Gatera, J. Belmans, F. Davin, W. De Cock, F. Doucet, L. Parez, F. Pompon, A. Ponton, D. Vandeplassche SCK•CEN, Mol, Belgium F. Bouly LPSC, Grenoble Cedex, France C. Joly, L. Perrot Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France H. Podlech IAP, Frankfurt am Main, Germany J. Tamura JAEA/J-PARC, Tokai-mura, Japan C. Zhang GSI, Darmstadt, Germany
	Funding: Part of this work was supported by the European Commission Framework Programme H₂020, MYRTE project nr. 662186 The MYRRHA project aims at coupling a 600 MeV proton accelerator to a subcritical fission core operating at a thermal power of 60 MW. The nominal proton beam for this ADS has an intensity of 4 mA and is delivered in a quasi-CW mode. Phase 1 of the project will realize a 100 MeV, 4 mA superconducting linac with the mission of ensuring the ADS requirements in terms of reliability and fault tolerance. As part of the reliability optimization program the integrated prototyping of the MINERVA injector is ongoing. The front-end of the injector is composed of an ECR proton source, a 2.6 m long LEBT (low energy beam transport line) and a four-rod RFQ accelerating the beam to 1.5 MeV. The present contribution focuses on the current beam tests on the RFQ, including beam matching, RF conditioning, assessment of the cavities’ performances and accelerated beam characterisation.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB205
About •	paper received ※ 19 May 2021 paper accepted ※ 31 May 2021 issue date ※ 24 August 2021
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TUPAB200	Status of the Electron Lens for Space Charge Compensation in SIS18	1880
	K. Schulte-Urlichs, S. Artikova, D. Ondreka, P.J. Spiller GSI, Darmstadt, Germany P. Apse-Apsitis, I. Steiks Riga Technical University, Riga, Latvia M. Droba, O. Meusel, H. Podlech, K.I. Thoma IAP, Frankfurt am Main, Germany
	At GSI a project has been initiated to investigate the option of space charge compensation (SCC) by use of an electron lens in order to overcome space charge (SC) limits in the synchrotrons SIS18 and SIS100 for the Facility for Antiproton and Ion Research (FAIR). The repeated crossing of resonance lines due to the synchrotron motion in bunched beams is considered one of the main drivers of SC induced beam loss in the synchrotrons. Electron lenses provide a compensation of ion beam SC by virtue of their negative charge interacting with the ions in the overlap region while a time-varying compensation can be achieved by the modulation of the electron beam. In order to demonstrate space charge compensation of bunched ion beams, an electron lens is under development for the application in SIS18. In this contribution, the status of the electron lens design will be reported putting special emphasis on its main components: the RF modulated electron gun, that is being developed within an ARIES collaboration, and the magnet system.
	Poster TUPAB200 [1.869 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB200
About •	paper received ※ 19 May 2021 paper accepted ※ 23 June 2021 issue date ※ 17 August 2021
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

LILac Energy Upgrade to 13 MeV

651

B. Koubek, S. Altürk, M. Busch, H. Höltermann, J.D. Kaiser, H. Podlech, U. Ratzinger, M. Schuett, M. Schwarz, W. Schweizer, D. Strehl, R. Tiede, C. Trageser
BEVATECH, Frankfurt, Germany
A. Brunzel, P. Nonn, H. Schlarb
DESY, Hamburg, Germany
A.V. Butenko, D.E. Donets, B.V. Golovenskiy, A. Govorov, K.A. Levterov, D.A. Lyuosev, A.A. Martynov, V.A. Monchinsky, D.O. Ponkin, K.V. Shevchenko, I.V. Shirikov, E. Syresin
JINR, Dubna, Moscow Region, Russia

In the frame of the NICA (Nuclotron-based Ion Collider fAcility) ion collider upgrade a new light ion LINAC for protons and ions will be built in collaboration between JINR and BEVATECH GmbH. While ions with a mass-to-charge ratio up to 3 will be fed into the NUCLOTRON ring with an energy of 7 MeV/u, protons are supposed to be accelerated up to an energy of 13 MeV using a third IH structure. This energy upgrade comprises a third IH structure, a dual-use Debuncher cavity as well as an extension of the LLRF control system built on MicroTCA technology.

Poster MOPAB192 [4.914 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB192

About •

paper received ※ 11 May 2021 paper accepted ※ 31 May 2021 issue date ※ 20 August 2021

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

WEPAB176

Acceleration of He⁺ Beams for Injection Into NICA Booster During its First Run

3016

K.A. Levterov, V.P. Akimov, D.S. Letkin, D.O. Leushin, V.V. Mialkovskiy
JINR/VBLHEP, Dubna, Moscow region, Russia
A.M. Bazanov, A.V. Butenko, D.E. Donets, D. Egorov, A.R. Galimov, B.V. Golovenskiy, A. Govorov, V.V. Kobets, A.D. Kovalenko, D.A. Lyuosev, A.A. Martynov, V.A. Monchinsky, D.O. Ponkin, I.V. Shirikov, A.O. Sidorin, E. Syresin, G.V. Trubnikov, A. Tuzikov
JINR, Dubna, Moscow Region, Russia
H. Höltermann, H. Podlech
BEVATECH, Frankfurt, Germany
U. Ratzinger, A. Schempp
IAP, Frankfurt am Main, Germany

Heavy Ion Linear Accelerator (HILAC) is designed to accelerate the heavy ions with ratio A/Z<=6.25 produced by ESIS ion source up to the 3.2 MeV for the injection into superconducting synchrotron (SC) Booster. HILAC was commissioned in 2018 using the carbon beams from Laser Ion Source (LIS). The project output energy was verified. Transmission could be estimated only for DTL structure because of the presence at the RFQ input the mixture of ions with different charge states extracted from laser-plasma. To estimate transmission through the whole linac the ion source producing the only species He⁺ was designed. The beams of He⁺ ions were used for the first run of SC Booster. The design of the helium ion source and results of the He⁺ beam acceleration and injection are described.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB176

About •

paper received ※ 19 May 2021 paper accepted ※ 11 June 2021 issue date ※ 22 August 2021

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

WEPAB202

Thermal Analysis of a Compact Split-Coaxial CW RFQ for the IsoDAR RFQ-DIP

3097

D. Koser, J.M. Conrad, D. Winklehner
MIT, Cambridge, Massachusetts, USA
H. Podlech, U. Ratzinger, M. Schuett
BEVATECH, Frankfurt, Germany

The RFQ direct injection project (RFQ-DIP) for the neutrino physics experiment IsoDAR aims at an efficient injection of a high-current H²⁺ beam into the dedicated 60 MeV driver cyclotron. Therefore, it is intended to use a compact 32.8 MHz RFQ structure of the split-coaxial type as a pre-buncher. To determine the thermal elongation of the 1.4 m long electrode rods as well as the thermal frequency detuning of the RF structure at a maximum nominal power load of 3.6 kW, an extensive thermal and structural mechanical analysis using COMSOL Multiphysics was conducted. The water heating along the cooling channels as well as the properties of heat transfer from the copper structure to the cooling water were taken into account, which required CFD simulations of the cooling water flow in the turbulent regime. Here we present the methods and results of the sophisticated thermal and structural mechanical simulations using COMSOL and provide a comparison to more simplistic simulations conducted with CST Studio Suite.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-WEPAB202

About •

paper received ※ 20 May 2021 paper accepted ※ 01 July 2021 issue date ※ 14 August 2021

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

THPAB167

Technical Design of an RFQ Injector for the IsoDAR Cyclotron

4075

H. Höltermann, D. Koser, B. Koubek, H. Podlech, U. Ratzinger, M. Schuett, M. Syha
BEVATECH, Frankfurt, Germany
J.M. Conrad, J. Smolsky, L.H. Waites, D. Winklehner
MIT, Cambridge, Massachusetts, USA

For the IsoDAR (Isotope Decay-At-Rest) experiment, a high intensity (10 mA CW) primary proton beam is needed. To generate this beam, H²⁺ is accelerated in a cyclotron and stripped into protons after extraction. An RFQ, partially embedded in the cyclotron yoke, will be used to bunch and axially inject H²⁺ ions into the main accelerator. The strong RFQ bunching capabilities will be used to optimize the overall injection efficiency. To keep the setup compact the distance between the ion source and RFQ can be kept very short as well. In this paper, we describe the technical design of the RFQ. We focus on two critical aspects: 1. The use of a split-coaxial structure, necessitated by the low frequency of 32.8 MHz (matching the cyclotron RF) and the desired small tank diameter; 2. The high current, CW operation, requiring a good cooling concept for the RFQ tank and vanes.

Poster THPAB167 [2.162 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB167

About •

paper received ※ 14 May 2021 paper accepted ※ 27 July 2021 issue date ※ 21 August 2021

Export •

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

MOPAB205

Minerva (MYRRHA Phase 1) RFQ Beam Commissioning

675

A. Gatera, J. Belmans, F. Davin, W. De Cock, F. Doucet, L. Parez, F. Pompon, A. Ponton, D. Vandeplassche
SCK•CEN, Mol, Belgium
F. Bouly
LPSC, Grenoble Cedex, France
C. Joly, L. Perrot
Université Paris-Saclay, CNRS/IN2P3, IJCLab, Orsay, France
H. Podlech
IAP, Frankfurt am Main, Germany
J. Tamura
JAEA/J-PARC, Tokai-mura, Japan
C. Zhang
GSI, Darmstadt, Germany

Funding: Part of this work was supported by the European Commission Framework Programme H₂020, MYRTE project nr. 662186
The MYRRHA project aims at coupling a 600 MeV proton accelerator to a subcritical fission core operating at a thermal power of 60 MW. The nominal proton beam for this ADS has an intensity of 4 mA and is delivered in a quasi-CW mode. Phase 1 of the project will realize a 100 MeV, 4 mA superconducting linac with the mission of ensuring the ADS requirements in terms of reliability and fault tolerance. As part of the reliability optimization program the integrated prototyping of the MINERVA injector is ongoing. The front-end of the injector is composed of an ECR proton source, a 2.6 m long LEBT (low energy beam transport line) and a four-rod RFQ accelerating the beam to 1.5 MeV. The present contribution focuses on the current beam tests on the RFQ, including beam matching, RF conditioning, assessment of the cavities’ performances and accelerated beam characterisation.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-MOPAB205

About •

paper received ※ 19 May 2021 paper accepted ※ 31 May 2021 issue date ※ 24 August 2021

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

TUPAB200

Status of the Electron Lens for Space Charge Compensation in SIS18

1880

K. Schulte-Urlichs, S. Artikova, D. Ondreka, P.J. Spiller
GSI, Darmstadt, Germany
P. Apse-Apsitis, I. Steiks
Riga Technical University, Riga, Latvia
M. Droba, O. Meusel, H. Podlech, K.I. Thoma
IAP, Frankfurt am Main, Germany

At GSI a project has been initiated to investigate the option of space charge compensation (SCC) by use of an electron lens in order to overcome space charge (SC) limits in the synchrotrons SIS18 and SIS100 for the Facility for Antiproton and Ion Research (FAIR). The repeated crossing of resonance lines due to the synchrotron motion in bunched beams is considered one of the main drivers of SC induced beam loss in the synchrotrons. Electron lenses provide a compensation of ion beam SC by virtue of their negative charge interacting with the ions in the overlap region while a time-varying compensation can be achieved by the modulation of the electron beam. In order to demonstrate space charge compensation of bunched ion beams, an electron lens is under development for the application in SIS18. In this contribution, the status of the electron lens design will be reported putting special emphasis on its main components: the RF modulated electron gun, that is being developed within an ARIES collaboration, and the magnet system.

Poster TUPAB200 [1.869 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB200

About •

paper received ※ 19 May 2021 paper accepted ※ 23 June 2021 issue date ※ 17 August 2021

Export •

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