IPAC2017 - Classification: 03 Novel Particle Sources and Acceleration Techniques / T01 Proton and Ion Sources

Paper	Title	Page
TUPIK002	H-, D-, C2-: A Comparison of RF andFilament Powered Volume-Cusp Ion Sources	1685
	S.V. Melanson, M.P. Dehnel, D.E. Potkins D-Pace, Nelson, British Columbia, Canada H.C. McDonald, C. Philpott BSL, Auckland, New Zealand
	Today's industrial ion source applications often require high beam currents with long source lifetime and low maintenance. Filament powered ion sources produce high beam currents but are limited by the short lifetime (~5000 mA*h) of the filament, while RF ion sources with external antennas do not require such maintenance. By changing the filament back plate of our TRIUMF licensed ion source to the ceramic window, planar coil antenna and 13.56 MHz RF amplifier of our University of Jyväskylä licensed ion source, we are able to directly compare the effect of the two technologies for powering sources on negative ion production in volume-cusp ion sources for the case of H-, D- and C2- using our ion source test facility.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK002
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TUPIK020	Application of Optical Emission Spectroscopy to High Current Proton Sources	1721
	G. Castro, L. Celona, S. Gammino, O. Leonardi, D. Mascali, M. Mazzaglia, E. Naselli, L. Neri, D. Nicolosi, R. Reitano, G. Torrisi INFN/LNS, Catania, Italy F. Leone INAF-OACT, Catania, Italy M. Mazzaglia, R. Reitano Universita Degli Studi Di Catania, Catania, Italy E. Naselli Catania University, Catania, Italy B. Zaniol Consorzio RFX, Padova, Italy
	Optical Emission Spectroscopy (OES) represents a very reliable technique to carry out non-invasive measurements of plasma density and plasma temperature in the range of tens of eV. Instead of other diagnostics, it also allows to characterize the different populations of neutrals and ionized particles constituting the plasma. At INFN-LNS, OES techniques have been developed and applied to characterize the plasma generated by the Flexible Plasma Trap, an ion source used as testbench of the proton source built for European Spallation Source. This work presents the characterization of the parameters of a hydrogen plasma in different conditions of neutral pressure, microwave power and magnetic field profile along with the perspectives for further upgrades of the OES diagnostics system.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK020
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TUPIK021	Microwave Injection and Coupling Optimization in ECR and MDIS Ion Sources	1724
	G. Torrisi, A.C. Caruso, G. Castro, L. Celona, S. Gammino, O. Leonardi, A. Longhitano, D. Mascali, E. Naselli, L. Neri, G. Sorbello INFN/LNS, Catania, Italy E. Naselli Catania University, Catania, Italy G. Sorbello University of Catania, Catania, Italy
	The fundamental aspect of coupling between microwave and plasma of the Electron Cyclotron Resonance Ion Source (ECRIS) and Microwave Discharge Ion Source (MDIS) is hereinafter treated together with ad hoc microwave-based plasma diagnostics, as a key element for the next progress and variations with respect to the classical ECR heating mechanism. The future challenges for the production of higher-charge states, higher beam intensity, and high absolute ionization efficiency also demand for the exploration of new heating schemes and synergy between experiments and modeling. An overview concerning microwave transport and coupling issues in plasma-based ion sources for particle accelerator will be given in the paper, along with perspectives for the design of next generation sources.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK021
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TUPIK030	Characterization of the AMIT Internal Ion Source With a Devoted DC Extraction Test Bench	1740
	D. Obradors-Campos, M.B. Ahedo, J.M. Barcala, J. Calero, P. Calvo, M.A. Domínguez, E.F. Estévez, J.M. Figarola, L. García-Tabarés, D. Gavela, P. Gómez, A. Guirao, J.L. Gutiérrez, J.I. Lagares, D. López, L.M. Martínez, J. Munilla, C. Oliver, J.M. Pérez Morales, I. Podadera, E. RodrÃguez GarcÃa, F. Toral, R. Varela, C. Vázquez CIEMAT, Madrid, Spain R. Iturbe, B. López ANTEC Magnets SLU, Vizcaya, Spain
	Funding: Work partially funded under the Resolution of the Spanish Ministery of Economy, Industry and Competitiveness dated May 24 th, 2016 and project FIS2013-40860-R With the main aim of a compact machine for 18F and 11C radioisotope production, AMIT cyclotron relies on a superconducting 4T magnet with an internal cold cathode PIG ion source for H⁻ production. Given the limited access to the ion source in the cyclotron as well the reduced number of beam diagnostics, an experimental facility was proposed for the commissioning of such ion source. The versatility of this test bench, which includes a movable puller, gives us the opportunity to validate and characterize the ion source behavior as well as to optimize the H⁻ production. In a first stage, the discharge characteristics of the ion source has been studied in the CIEMAT IST facilities.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK030
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WEOBB2	Beam Commissioning of the High Intensity Proton Source Developed at INFN-LNS for the European Spallation Source	2530
	L. Neri, L. Allegra, A. Amato, G. Calabrese, A.C. Caruso, G. Castro, L. Celona, F. Chines, G. Gallo, S. Gammino, O. Leonardi, A. Longhitano, G. Manno, S. Marletta, D. Mascali, M. Mazzaglia, A. Miraglia, S. Passarello, G. Pastore, A. Seminara, A. Spartà, G. Torrisi, S. Vinciguerra INFN/LNS, Catania, Italy
	At the Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud (INFN-LNS) the beam commissioning of the high intensity Proton Source for the European Spallation Source (PS-ESS) started in November 2016. Beam stability at high current intensity is one of the most important parameter for the first steps of the ongoing commissioning. Promising results were obtained since the first source start with a 6 mm diameter extraction hole. The increase of the extraction hole to 8 mm allowed improving PS-ESS performances and obtaining the values required by the ESS accelerator. In this work, extracted beam current characteristics together with Doppler shift and emittance measurements are presented, as well as the description of the next phases before the installation at ESS in Lund.
	Slides WEOBB2 [2.457 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOBB2
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Paper

Title

Page

H-, D-, C2-: A Comparison of RF andFilament Powered Volume-Cusp Ion Sources

1685

S.V. Melanson, M.P. Dehnel, D.E. Potkins
D-Pace, Nelson, British Columbia, Canada
H.C. McDonald, C. Philpott
BSL, Auckland, New Zealand

Today's industrial ion source applications often require high beam currents with long source lifetime and low maintenance. Filament powered ion sources produce high beam currents but are limited by the short lifetime (~5000 mA*h) of the filament, while RF ion sources with external antennas do not require such maintenance. By changing the filament back plate of our TRIUMF licensed ion source to the ceramic window, planar coil antenna and 13.56 MHz RF amplifier of our University of Jyväskylä licensed ion source, we are able to directly compare the effect of the two technologies for powering sources on negative ion production in volume-cusp ion sources for the case of H-, D- and C2- using our ion source test facility.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK002

Export •

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

TUPIK020

Application of Optical Emission Spectroscopy to High Current Proton Sources

1721

G. Castro, L. Celona, S. Gammino, O. Leonardi, D. Mascali, M. Mazzaglia, E. Naselli, L. Neri, D. Nicolosi, R. Reitano, G. Torrisi
INFN/LNS, Catania, Italy
F. Leone
INAF-OACT, Catania, Italy
M. Mazzaglia, R. Reitano
Universita Degli Studi Di Catania, Catania, Italy
E. Naselli
Catania University, Catania, Italy
B. Zaniol
Consorzio RFX, Padova, Italy

Optical Emission Spectroscopy (OES) represents a very reliable technique to carry out non-invasive measurements of plasma density and plasma temperature in the range of tens of eV. Instead of other diagnostics, it also allows to characterize the different populations of neutrals and ionized particles constituting the plasma. At INFN-LNS, OES techniques have been developed and applied to characterize the plasma generated by the Flexible Plasma Trap, an ion source used as testbench of the proton source built for European Spallation Source. This work presents the characterization of the parameters of a hydrogen plasma in different conditions of neutral pressure, microwave power and magnetic field profile along with the perspectives for further upgrades of the OES diagnostics system.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK020

Export •

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

TUPIK021

Microwave Injection and Coupling Optimization in ECR and MDIS Ion Sources

1724

G. Torrisi, A.C. Caruso, G. Castro, L. Celona, S. Gammino, O. Leonardi, A. Longhitano, D. Mascali, E. Naselli, L. Neri, G. Sorbello
INFN/LNS, Catania, Italy
E. Naselli
Catania University, Catania, Italy
G. Sorbello
University of Catania, Catania, Italy

The fundamental aspect of coupling between microwave and plasma of the Electron Cyclotron Resonance Ion Source (ECRIS) and Microwave Discharge Ion Source (MDIS) is hereinafter treated together with ad hoc microwave-based plasma diagnostics, as a key element for the next progress and variations with respect to the classical ECR heating mechanism. The future challenges for the production of higher-charge states, higher beam intensity, and high absolute ionization efficiency also demand for the exploration of new heating schemes and synergy between experiments and modeling. An overview concerning microwave transport and coupling issues in plasma-based ion sources for particle accelerator will be given in the paper, along with perspectives for the design of next generation sources.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK021

Export •

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

TUPIK030

Characterization of the AMIT Internal Ion Source With a Devoted DC Extraction Test Bench

1740

D. Obradors-Campos, M.B. Ahedo, J.M. Barcala, J. Calero, P. Calvo, M.A. Domínguez, E.F. Estévez, J.M. Figarola, L. García-Tabarés, D. Gavela, P. Gómez, A. Guirao, J.L. Gutiérrez, J.I. Lagares, D. López, L.M. Martínez, J. Munilla, C. Oliver, J.M. Pérez Morales, I. Podadera, E. RodrÃguez GarcÃa, F. Toral, R. Varela, C. Vázquez
CIEMAT, Madrid, Spain
R. Iturbe, B. López
ANTEC Magnets SLU, Vizcaya, Spain

Funding: Work partially funded under the Resolution of the Spanish Ministery of Economy, Industry and Competitiveness dated May 24 th, 2016 and project FIS2013-40860-R
With the main aim of a compact machine for 18F and 11C radioisotope production, AMIT cyclotron relies on a superconducting 4T magnet with an internal cold cathode PIG ion source for H⁻ production. Given the limited access to the ion source in the cyclotron as well the reduced number of beam diagnostics, an experimental facility was proposed for the commissioning of such ion source. The versatility of this test bench, which includes a movable puller, gives us the opportunity to validate and characterize the ion source behavior as well as to optimize the H⁻ production. In a first stage, the discharge characteristics of the ion source has been studied in the CIEMAT IST facilities.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK030

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

WEOBB2

Beam Commissioning of the High Intensity Proton Source Developed at INFN-LNS for the European Spallation Source

2530

L. Neri, L. Allegra, A. Amato, G. Calabrese, A.C. Caruso, G. Castro, L. Celona, F. Chines, G. Gallo, S. Gammino, O. Leonardi, A. Longhitano, G. Manno, S. Marletta, D. Mascali, M. Mazzaglia, A. Miraglia, S. Passarello, G. Pastore, A. Seminara, A. Spartà, G. Torrisi, S. Vinciguerra
INFN/LNS, Catania, Italy

At the Istituto Nazionale di Fisica Nucleare Laboratori Nazionali del Sud (INFN-LNS) the beam commissioning of the high intensity Proton Source for the European Spallation Source (PS-ESS) started in November 2016. Beam stability at high current intensity is one of the most important parameter for the first steps of the ongoing commissioning. Promising results were obtained since the first source start with a 6 mm diameter extraction hole. The increase of the extraction hole to 8 mm allowed improving PS-ESS performances and obtaining the values required by the ESS accelerator. In this work, extracted beam current characteristics together with Doppler shift and emittance measurements are presented, as well as the description of the next phases before the installation at ESS in Lund.

Slides WEOBB2 [2.457 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEOBB2

Export •

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