Cyclotrons2019 - List of Keywords (vacuum)

Paper	Title	Other Keywords	Page
MOP008	Mechanical Design of Beam Lines for a 230 MeV SC Cyclotron at CIAE	dipole, proton, quadrupole, cyclotron	42
	M. Yin, S. An, F.P. Guan, Y.L. Lv, G.F. Pan, F. Wang, F. Wang, S.M. Wei, L.P. Wen, T.J. Zhang, F.Zhu. Zhu CIAE, Beijing, People’s Republic of China
	Funding: This work was supported in part by the National Natural Science Foundation of China under Grant 11475269 and 11375274. To develop the proton beam transfer system which used in the field of proton therapy, the mechanical design of proton beam lines based on the CYCIAE-230 has been finished at the China Institute of Atomic Energy (CIAE). The proton beam transfer system includes the beam lines, beam dump, gantry, nozzle, couch, image guidance system, etc. Two beam lines are designed at CIAE this moment. One is for the nozzle system, the other is for the beam dump. The beam lines include four systems: the energy selection system, the beam transportation systems, gantry system, beam dump. The beam lines are very compact in order to match the beam optics and the space limitation. The gantry can be rotated ±180°. There are several key components in beam lines, such as magnets, degrader, beam diagnostics component, vacuum component, etc. The designed mechanical tolerance of the magnets is limited less than 0.1 mm. There are at least four targets on each magnets for collimation and all the components can be adjusted in three dimensions. The magnets are being manufactured now. The mechanical design of proton beam lines based on the CYCIAE-230 will be presented in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP008
About •	paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP013	Mechanical Modifications of the Median Plane for the Superconducting Cyclotron Upgrade	extraction, cyclotron, superconducting-magnet, simulation	51
	G. Gallo, L. Allegra, L. Calabretta, A.C. Caruso, G. Costa, E. Messina, M.S. Musumeci, D. Rifuggiato, E. Zappalà INFN/LNS, Catania, Italy
	The Superconducting Cyclotron (CS) is a three sectors, compact accelerator with a wide operating diagram, capable of accelerating heavy ions with q/A from 0.1 to 0.5 up to energies from 2 to 100 MeV/u. Recently a significant upgrade has been proposed to increase the light ion beam intensity by means of extraction by stripping. For the implementation of the new extraction mode, many relevant modifications are needed in the median plane. The biggest upgrade action is the replacement of the present superconducting magnet with a new one, compatible with the beam trajectory and envelope in the extraction by stripping. The extraction by stripping mode implies the installation of two stripper systems, one in a hill and the other in a valley, that allow to extract all the ions requested by the users. Finally, since the present electrostatic extraction mode will be maintained, several relevant mechanical issues have to be faced when switching from one extraction mode to the other one, the location of one electrostatic deflector being the same as the stripper system. The focus of this paper will be the presentation of the different mechanical features involved in the upgrade.
	Poster MOP013 [1.583 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP013
About •	paper received ※ 12 September 2019 paper accepted ※ 24 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP024	Development of a Replacement for the Long Radial Probe in the Ring Cyclotron	cyclotron, plasma, simulation, cavity	86
	R. Dölling, G.G. Gamma, V. Ovinnikov, M. Rohrer, P. Rüttimann, R. Senn PSI, Villigen PSI, Switzerland
	The long radial probe in PSI’s Ring cyclotron delivers a radial pattern of all but the first few turns. In recent years, the measurement has been plagued by artefacts and mechanical problems. We report here on the development of a replacement, which should also provide a more flexible basis for extended measurement capabilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP024
About •	paper received ※ 20 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP025	Fast Recharging of Electrostatic Injection and Extraction Septa After Breakdown	ISOL, plasma, septum, cyclotron	90
	R. Dölling PSI, Villigen PSI, Switzerland J. Brutscher Private Address, Dresden, Germany
	We propose to recharge an electrostatic injection or extraction septum in a high-power cyclotron fast enough to omit the need for switching off the beam at a high voltage breakdown.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP025
About •	paper received ※ 20 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOP034	Beam Stripping Interactions Implemented in Cyclotrons with OPAL Simulation Code	cyclotron, electron, simulation, experiment	109
	P. Calvo, C. Oliver CIEMAT, Madrid, Spain A. Adelmann, M. Frey, A. Gsell, J. Snuverink PSI, Villigen PSI, Switzerland
	Beam transmission optimization and losses characterization, where beam stripping interactions are a key issue, play an important role in the design and operation of compact cyclotrons. A beam stripping model has been implemented in the three-dimensional object-oriented parallel code OPAL-cycl, a flavor of the OPAL framework. The model includes Monte Carlo methods for interaction with residual gas and dissociation by electromagnetic stripping. The model has been verified with theoretical models and it has been applied to the AMIT cyclotron according to design conditions.
	Poster MOP034 [0.880 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP034
About •	paper received ※ 12 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP009	Cyclotron Cavity Pollution Recovery	cavity, cyclotron, multipactoring, electron	169
	J. Dabin, B. Adant, P. Cailliau, K. Ellis, E. Forton, J. Mandrillon, T.S. Ponter, P. Verbruggen IBA, Louvain-la-Neuve, Belgium
	In a cyclotron, RF cavities are usually among the most reliable subsystems, provided minimal care and maintenance. Nevertheless, several parameters may affect cavity performance after several years of operation. To name a few typical causes of degradation are: decreasing vacuum quality, various gas loads or gas qualities triggering adverse effects, deposition of highly emissive material on the cavity due to overheating of components like pass-through connectors, accidental use of chemicals or not-suitable greases. The cavity status can be monitored but, in the worst cases, the RF tuning may become difficult and it is important to apply methods in order to recover a better cavity Q-factor. In this paper, cases of cavity pollution will be shown, their potential root causes discussed and some recovery methods described.
	Poster TUP009 [0.398 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP009
About •	paper received ※ 12 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP022	Status of a 70 MeV Cyclotron System for ISOL Driver of Rare Isotope Science Project in Korea	cyclotron, target, ISOL, diagnostics	205
	J.-W. Kim, J. Kang, J.H. Kim, T.S. Shin IBS, Daejeon, Republic of Korea
	A 70 MeV H⁻ cyclotron commercially available for medical isotope production will be used as an ISOL driver for rare isotope science project in Korea. The cyclotron is scheduled to be installed in 2021 for beam commissioning in the following year. In fact the building to house the cyclotron is currently almost complete so that the cyclotron system newly contracted needs to fit into the existing building, which brings some challenges in equipment installation and adaptation to utilities. Two beam lines to transport high-current proton beams into ISOL targets have been designed and are described along with other issues associated with the interface of the ISOL system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP022
About •	paper received ※ 12 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUP033	Concept of 15 Mev Cyclotron for Medical Isotopes Production	cyclotron, proton, cavity, acceleration	233
	O. Karamyshev JINR, Dubna, Moscow Region, Russia
	The purpose of this article is to show the prospects of cyclotrons with resistive coils and prove that even in such a well-established field there is still room for innovation. The concept of a 15 MeV cyclotron accelerating HÂ¯ ions with a current of up to 1 mA is presented. The design features significantly lower weight and power consumption, compared to the majority of existing cyclotrons of the same energy.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP033
About •	paper received ※ 15 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THC04	3D Printing for High Vacuum Applications	laser, experiment, operation, background	317
	C.R. Wolf HS Coburg, Coburg, Germany F.B. Beck, L. Franz, V.M. Neumaier Ernes, Coburg, Germany
	This thesis deals with the manufacture of parts made by 3D printing for high vacuum application. Different components are printed and examined for their vacuum suitability. As shown furthermore, conventionally made standard components can be welded vacuum-tightly to 3D-printed parts, which enables cost-effective production of more complex components, such as a vacuum chamber. In addition, functional components can already be realized during the manufacturing process. The integration of a system of flow channels directly into the wall of a vacuum-chamber is just one example. Thus, such a vacuum-chamber can be heated during evacuation and effectively cooled in later operation.
	Slides THC04 [3.310 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-THC04
About •	paper received ※ 29 August 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOP008

Mechanical Design of Beam Lines for a 230 MeV SC Cyclotron at CIAE

dipole, proton, quadrupole, cyclotron

42

M. Yin, S. An, F.P. Guan, Y.L. Lv, G.F. Pan, F. Wang, F. Wang, S.M. Wei, L.P. Wen, T.J. Zhang, F.Zhu. Zhu
CIAE, Beijing, People’s Republic of China

Funding: This work was supported in part by the National Natural Science Foundation of China under Grant 11475269 and 11375274.
To develop the proton beam transfer system which used in the field of proton therapy, the mechanical design of proton beam lines based on the CYCIAE-230 has been finished at the China Institute of Atomic Energy (CIAE). The proton beam transfer system includes the beam lines, beam dump, gantry, nozzle, couch, image guidance system, etc. Two beam lines are designed at CIAE this moment. One is for the nozzle system, the other is for the beam dump. The beam lines include four systems: the energy selection system, the beam transportation systems, gantry system, beam dump. The beam lines are very compact in order to match the beam optics and the space limitation. The gantry can be rotated ±180°. There are several key components in beam lines, such as magnets, degrader, beam diagnostics component, vacuum component, etc. The designed mechanical tolerance of the magnets is limited less than 0.1 mm. There are at least four targets on each magnets for collimation and all the components can be adjusted in three dimensions. The magnets are being manufactured now. The mechanical design of proton beam lines based on the CYCIAE-230 will be presented in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP008

About •

paper received ※ 15 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

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

MOP013

Mechanical Modifications of the Median Plane for the Superconducting Cyclotron Upgrade

extraction, cyclotron, superconducting-magnet, simulation

51

G. Gallo, L. Allegra, L. Calabretta, A.C. Caruso, G. Costa, E. Messina, M.S. Musumeci, D. Rifuggiato, E. Zappalà
INFN/LNS, Catania, Italy

The Superconducting Cyclotron (CS) is a three sectors, compact accelerator with a wide operating diagram, capable of accelerating heavy ions with q/A from 0.1 to 0.5 up to energies from 2 to 100 MeV/u. Recently a significant upgrade has been proposed to increase the light ion beam intensity by means of extraction by stripping. For the implementation of the new extraction mode, many relevant modifications are needed in the median plane. The biggest upgrade action is the replacement of the present superconducting magnet with a new one, compatible with the beam trajectory and envelope in the extraction by stripping. The extraction by stripping mode implies the installation of two stripper systems, one in a hill and the other in a valley, that allow to extract all the ions requested by the users. Finally, since the present electrostatic extraction mode will be maintained, several relevant mechanical issues have to be faced when switching from one extraction mode to the other one, the location of one electrostatic deflector being the same as the stripper system. The focus of this paper will be the presentation of the different mechanical features involved in the upgrade.

Poster MOP013 [1.583 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP013

About •

paper received ※ 12 September 2019 paper accepted ※ 24 September 2019 issue date ※ 20 June 2020

Export •

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

MOP024

Development of a Replacement for the Long Radial Probe in the Ring Cyclotron

cyclotron, plasma, simulation, cavity

86

R. Dölling, G.G. Gamma, V. Ovinnikov, M. Rohrer, P. Rüttimann, R. Senn
PSI, Villigen PSI, Switzerland

The long radial probe in PSI’s Ring cyclotron delivers a radial pattern of all but the first few turns. In recent years, the measurement has been plagued by artefacts and mechanical problems. We report here on the development of a replacement, which should also provide a more flexible basis for extended measurement capabilities.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP024

About •

paper received ※ 20 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

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

MOP025

Fast Recharging of Electrostatic Injection and Extraction Septa After Breakdown

ISOL, plasma, septum, cyclotron

90

R. Dölling
PSI, Villigen PSI, Switzerland
J. Brutscher
Private Address, Dresden, Germany

We propose to recharge an electrostatic injection or extraction septum in a high-power cyclotron fast enough to omit the need for switching off the beam at a high voltage breakdown.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP025

About •

paper received ※ 20 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

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

MOP034

Beam Stripping Interactions Implemented in Cyclotrons with OPAL Simulation Code

cyclotron, electron, simulation, experiment

109

P. Calvo, C. Oliver
CIEMAT, Madrid, Spain
A. Adelmann, M. Frey, A. Gsell, J. Snuverink
PSI, Villigen PSI, Switzerland

Beam transmission optimization and losses characterization, where beam stripping interactions are a key issue, play an important role in the design and operation of compact cyclotrons. A beam stripping model has been implemented in the three-dimensional object-oriented parallel code OPAL-cycl, a flavor of the OPAL framework. The model includes Monte Carlo methods for interaction with residual gas and dissociation by electromagnetic stripping. The model has been verified with theoretical models and it has been applied to the AMIT cyclotron according to design conditions.

Poster MOP034 [0.880 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-MOP034

About •

paper received ※ 12 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

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

TUP009

Cyclotron Cavity Pollution Recovery

cavity, cyclotron, multipactoring, electron

169

J. Dabin, B. Adant, P. Cailliau, K. Ellis, E. Forton, J. Mandrillon, T.S. Ponter, P. Verbruggen
IBA, Louvain-la-Neuve, Belgium

In a cyclotron, RF cavities are usually among the most reliable subsystems, provided minimal care and maintenance. Nevertheless, several parameters may affect cavity performance after several years of operation. To name a few typical causes of degradation are: decreasing vacuum quality, various gas loads or gas qualities triggering adverse effects, deposition of highly emissive material on the cavity due to overheating of components like pass-through connectors, accidental use of chemicals or not-suitable greases. The cavity status can be monitored but, in the worst cases, the RF tuning may become difficult and it is important to apply methods in order to recover a better cavity Q-factor. In this paper, cases of cavity pollution will be shown, their potential root causes discussed and some recovery methods described.

Poster TUP009 [0.398 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP009

About •

paper received ※ 12 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020

Export •

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

TUP022

Status of a 70 MeV Cyclotron System for ISOL Driver of Rare Isotope Science Project in Korea

cyclotron, target, ISOL, diagnostics

205

J.-W. Kim, J. Kang, J.H. Kim, T.S. Shin
IBS, Daejeon, Republic of Korea

A 70 MeV H⁻ cyclotron commercially available for medical isotope production will be used as an ISOL driver for rare isotope science project in Korea. The cyclotron is scheduled to be installed in 2021 for beam commissioning in the following year. In fact the building to house the cyclotron is currently almost complete so that the cyclotron system newly contracted needs to fit into the existing building, which brings some challenges in equipment installation and adaptation to utilities. Two beam lines to transport high-current proton beams into ISOL targets have been designed and are described along with other issues associated with the interface of the ISOL system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP022

About •

paper received ※ 12 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020

Export •

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

TUP033

Concept of 15 Mev Cyclotron for Medical Isotopes Production

cyclotron, proton, cavity, acceleration

233

O. Karamyshev
JINR, Dubna, Moscow Region, Russia

The purpose of this article is to show the prospects of cyclotrons with resistive coils and prove that even in such a well-established field there is still room for innovation. The concept of a 15 MeV cyclotron accelerating HÂ¯ ions with a current of up to 1 mA is presented. The design features significantly lower weight and power consumption, compared to the majority of existing cyclotrons of the same energy.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUP033

About •

paper received ※ 15 September 2019 paper accepted ※ 25 September 2019 issue date ※ 20 June 2020

Export •

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

THC04

3D Printing for High Vacuum Applications

laser, experiment, operation, background

317

C.R. Wolf
HS Coburg, Coburg, Germany
F.B. Beck, L. Franz, V.M. Neumaier
Ernes, Coburg, Germany

This thesis deals with the manufacture of parts made by 3D printing for high vacuum application. Different components are printed and examined for their vacuum suitability. As shown furthermore, conventionally made standard components can be welded vacuum-tightly to 3D-printed parts, which enables cost-effective production of more complex components, such as a vacuum chamber. In addition, functional components can already be realized during the manufacturing process. The integration of a system of flow channels directly into the wall of a vacuum-chamber is just one example. Thus, such a vacuum-chamber can be heated during evacuation and effectively cooled in later operation.

Slides THC04 [3.310 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-THC04

About •

paper received ※ 29 August 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

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