ECRIS2016 - List of Keywords (injection)

Paper	Title	Other Keywords	Page
MOBO02	Possible Optimizations of Existing Magnet Structures for the Next Generation of ECRIS	ion, ECR, sextupole, ECRIS	5
	D. Xie, G.L. Sabbi, D.S. Todd LBNL, Berkeley, California, USA W. Lu IMP/CAS, Lanzhou, People's Republic of China
	Constructing a minimum-B structure with higher magnetic fields is the prerequisite for the next generation of Electron Cyclotron Resonance Ion Sources (ECRIS): ion sources that will operate at substantially higher heating frequencies than those currently in use. There are three leading candidates of Nb3Sn coil structures for use in future ECRISs: a Mixed Axial and Radial field System (MARS) that merges the sextupole racetrack coils and partial end-solenoids into an exotic closed-loop-coil; a classical Sextupole-In-Solenoids design; and a Solenoids-In-Sextupole configuration. Focusing on efficient magnetic field generation, this article briefly reviews the advantages and disadvantages of each of these magnet structures. Though Sextupole-In-Solenoids and Solenoids-In-Sextupole magnetic structures using NbTi conductor have been validated by current ECRISs, improvements of these magnet structures remain possible. Possible optimizations to the two existing magnet structures, such as using a non-conventional sextupole magnet consisting of either V-bend or skew racetrack coils, are discussed. The development status of a MARS NbTi magnet at LBNL for a new ECRIS will be also presented.
	Slides MOBO02 [3.864 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOBO02
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MOFO01	SPIRAL1 Charge Breeder: Performances and Status	ion, experiment, operation, plasma	35
	L. Maunoury, O. Bajeat, C. Barthe-Dejean, P. Delahaye, M. Dubois, R. Frigot, P. Jardin, A. Jeanne, O. Kamalou, P. Lecomte, O. Osmond, G. Peschard, A. Savalle GANIL, Caen, France J. Angot, T. Lamy, P. Sole LPSC, Grenoble Cedex, France
	In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breeder based on a LPSC Phoenix ECRIS, first tested at ISOLDE* has been modified as to benefit of the last enhancements of this device from the 1+ / n+ community*. Prior to its installation in the middle of the low energy beam line of the SPIRAL1 facility, it has been tested at the 1+/n+ LPSC test bench to validate its operation performances. Charge breeding efficiencies as well as charge breeding times have been measured for noble gases and alkali elements. The experimental results demonstrated that the modifications done were on the right track leading the SPIRAL1 charge breeder to the top worldwide in terms of performances. The experimental outcomes have proved the strong interrelationship between the charge breeding efficiency and the charge breeding times which are still under active discussion. P. Delahaye et al, Review of Scientific Instruments. 77, 03B105 (2006) ** R. Vondrasek et al, Review of Scientific Instruments 83 113303 (2012)
	Slides MOFO01 [10.461 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOFO01
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TUAO01	The Proton Source for the European Spallation Source (PS-ESS): Installation and Commissioning at INFN-LNS	ion, plasma, proton, MMI	39
	L. Celona, L. Allegra, A. Amato, G. Calabrese, A.C. Caruso, G. Castro, F. Chines, G. Gallo, S. Gammino, O. Leonardi, A. Longhitano, G. Manno, S. Marletta, D. Mascali, A. Massara, A. Maugeri, M. Mazzaglia, L. Neri, S. Passarello, G. Pastore, A. Seminara, A. Spartà, G. Torrisi, S. Vinciguerra INFN/LNS, Catania, Italy S. Di Martino, P. Nicotra Si.A.Tel SRL, Catania, Italy
	A 2.45 GHz ' 0.1 T microwave discharge Proton Source has been designed and assembled at INFN-LNS for the European Spallation Source (PS-ESS) in order to produce pulsed beams of protons up to 74 mA nominal current, at 75 keV of energy, with a transverse emittance containing 99 % of the nominal proton current below 2.25 π mm mrad and a beam stability of ± 2 %. The challenging performances of the machine have triggered specific studies on the maximization of the proton fraction inside the plasma and of the overall plasma density, including dedicated modelling of the wave-to-plasma interaction and ionization processes. The plasma conditioning phase started in July and excellent RF to plasma coupling, more than 99.5% is evident since the beginning. Reflected power fluctuation less than 0.05 % was measured providing a great starting point to reach the beam stability requested by the ESS accelerator.
	Slides TUAO01 [14.571 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-TUAO01
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TUAO05	First Plasma of the PHOENIX V3 ECR Ion Source	ion, plasma, MMI, ECR	48
	T. Thuillier, J. Angot, L. Bonny, J. Jacob, T. Lamy, P. Sole LPSC, Grenoble Cedex, France J.L. Flambard, L. Maunoury GANIL, Caen, France T. Kalvas JYFL, Jyväskylä, Finland C. Peaucelle IN2P3 IPNL, Villeurbanne, France
	Funding: This project was partially funded by the EU Grant Agreement 283745. PHOENIX V3 is an upgrade of the PHOENIX V2 ECR ion source granted by the European CRISP project. This new ECRIS features a larger plasma chamber and a re-duced vacuum pressure under operation. The V3 source will replace the V2 one on the SPIRAL2 accelerator in 2018. The first plasma of PHOENIX V3 was achieved on May 9th 2016. The early commissioning of the V3 source at low 18 GHz power demonstrates as expected an en-hancement of the high charge state production and Ar¹⁴⁺ intensity already exceeds the V2 one. Further enhance-ments are expected the outgassing will be achieved and the full RF power will be injected in the source.
	Slides TUAO05 [7.050 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-TUAO05
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WEPP15	Design, Construction and Commissioning of the New Superconducting Ion Source AISHa	ion, plasma, ECR, MMI	109
	L. Celona, G. Castro, F. Chines, G. Ciavola, G. Costa, S. Gammino, O. Leonardi, S. Marletta, D. Mascali, F. Noto, G. Pastore, G. Torrisi, S. Vinciguerra INFN/LNS, Catania, Italy
	At INFN-LNS a new superconducting ECRIS named AISHa has been designed with the aim to provide highly charged ion beams with low ripple, high stability and high reproducibility, also fulfilling the needs of hospital installations (e.g. L-He free, easy to use, etc.). It is a hybrid ion source based on a permanent magnet hexapole providing 1.3 T on plasma chamber walls, and four superconducting coils for the axial trapping. The axial magnetic system is very flexible in order to minimize the hot electron component and to optimize the ECR heating by controlling the field gradients and the resonance length. The design of the hexapole aimed to minimize the demagnetization due to SC coils. The magnetic system measurement confirmed the effectiveness of the adopted solutions. Innovative solutions have been also implemented as it concerns the RF system design. It will permit to operate in single/double frequency mode, supported by variable frequency high power klystron generators, thus exploiting at the same time the FTE Frequency Tuning Effect and the Two Frequency Heating. The source has been assembled at the INFN-LNS site and the commissioning phase already started.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP15
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP35	Four-Dimension Transverse Phase-Space Distribution Measured by a Pepper-Pot Emittance Meter	ion, emittance, ECR, plasma	125
	T. Nagatomo, O. Kamigaito, M. Kase, T. Nakagawa RIKEN Nishina Center, Wako, Japan J.W. Stetson NSCL, East Lansing, Michigan, USA V. Tzoganis Cockcroft Institute, Warrington, Cheshire, United Kingdom
	Four-dimensional (4-D) transverse emittance of the highly charged heavy ion beam extracted from ECR ion source is invariant under linear 4-D symplectic operation. Thus, it is essential quantity to improve the beam quality. Measurement of the 4-D phase-space distribution provides quantitative and essential information to improve the efficiency of beam transport. We have developed an on-line pepper-pot-type emittance meter, which is a suitable device to obtain the 4-D phase-space distribution from an image of beamlets passing through the well-aligned pinholes. The emittance meter consists of a thin metal plate with a pinhole array, which is translated along the beam axis, and an imaging screen (P46) with a MCP. We optimized the analysis procedure to obtain the distribution so that the elapsed time of the process was shortened as less than 1 second, and which was enough short for on-line measurements. We will discuss the quality of the obtained 4-D distribution by comparing it with the one obtained from a simulation. Further, we will also discuss how the gas pressure of LEBT affects the 4-D distribution to establish to improve the beam brightness.
	Poster WEPP35 [2.753 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP35
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPP40	Fast Sputtering Measurement Studies using Uranium with the NSCL ECR Ion Sources	ion, plasma, ECR, high-voltage	129
	D.E. Neben, J. Fogleman, A.N. Pham, S. Renteria, L. Tobos NSCL, East Lansing, Michigan, USA D. Leitner LBNL, Berkeley, California, USA G. Machicoane FRIB, East Lansing, Michigan, USA G. Parsey MSU, East Lansing, Michigan, USA J.P. Verboncoeur Michigan State University, East Lansing, Michigan, USA
	Funding: Michigan State University and the National Science Foundation: NSF Award Number PHY-1415462 Existing heavy ion facilities such as the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University rely on Electron Cyclotron Resonance (ECR) ion sources as injectors of highly charged ion beams. Long ion confinement times are necessary to produce dense populations of highly charged ions because of steadily decreasing ionization cross sections with increasing charge state. To further understand ion extraction and confinement we are using a fast sputtering technique first developed at Argonne National Laboratory [1] to introduce a small amount of uranium metal into the plasma at a well-defined time. In addition we utilize an axial x-ray apparatus [2] to characterize the hot electron plasma population via its bremsstrahlung emission. R. Vondrasek, et. Al., Rev. Sci. Instrum. 73, 548 (2002) *T. Ropponen, et. Al., Proceedings of ECRIS2010, Grenoble France (2010)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP40
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOBO02

Possible Optimizations of Existing Magnet Structures for the Next Generation of ECRIS

ion, ECR, sextupole, ECRIS

5

D. Xie, G.L. Sabbi, D.S. Todd
LBNL, Berkeley, California, USA
W. Lu
IMP/CAS, Lanzhou, People's Republic of China

Constructing a minimum-B structure with higher magnetic fields is the prerequisite for the next generation of Electron Cyclotron Resonance Ion Sources (ECRIS): ion sources that will operate at substantially higher heating frequencies than those currently in use. There are three leading candidates of Nb3Sn coil structures for use in future ECRISs: a Mixed Axial and Radial field System (MARS) that merges the sextupole racetrack coils and partial end-solenoids into an exotic closed-loop-coil; a classical Sextupole-In-Solenoids design; and a Solenoids-In-Sextupole configuration. Focusing on efficient magnetic field generation, this article briefly reviews the advantages and disadvantages of each of these magnet structures. Though Sextupole-In-Solenoids and Solenoids-In-Sextupole magnetic structures using NbTi conductor have been validated by current ECRISs, improvements of these magnet structures remain possible. Possible optimizations to the two existing magnet structures, such as using a non-conventional sextupole magnet consisting of either V-bend or skew racetrack coils, are discussed. The development status of a MARS NbTi magnet at LBNL for a new ECRIS will be also presented.

Slides MOBO02 [3.864 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOBO02

Export •

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

MOFO01

SPIRAL1 Charge Breeder: Performances and Status

ion, experiment, operation, plasma

35

L. Maunoury, O. Bajeat, C. Barthe-Dejean, P. Delahaye, M. Dubois, R. Frigot, P. Jardin, A. Jeanne, O. Kamalou, P. Lecomte, O. Osmond, G. Peschard, A. Savalle
GANIL, Caen, France
J. Angot, T. Lamy, P. Sole
LPSC, Grenoble Cedex, France

In the framework of the SPIRAL1 upgrade under progress at the GANIL lab, the charge breeder based on a LPSC Phoenix ECRIS, first tested at ISOLDE* has been modified as to benefit of the last enhancements of this device from the 1+ / n+ community**. Prior to its installation in the middle of the low energy beam line of the SPIRAL1 facility, it has been tested at the 1+/n+ LPSC test bench to validate its operation performances. Charge breeding efficiencies as well as charge breeding times have been measured for noble gases and alkali elements. The experimental results demonstrated that the modifications done were on the right track leading the SPIRAL1 charge breeder to the top worldwide in terms of performances. The experimental outcomes have proved the strong interrelationship between the charge breeding efficiency and the charge breeding times which are still under active discussion.
* P. Delahaye et al, Review of Scientific Instruments. 77, 03B105 (2006)
** R. Vondrasek et al, Review of Scientific Instruments 83 113303 (2012)

Slides MOFO01 [10.461 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-MOFO01

Export •

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

TUAO01

The Proton Source for the European Spallation Source (PS-ESS): Installation and Commissioning at INFN-LNS

ion, plasma, proton, MMI

39

L. Celona, L. Allegra, A. Amato, G. Calabrese, A.C. Caruso, G. Castro, F. Chines, G. Gallo, S. Gammino, O. Leonardi, A. Longhitano, G. Manno, S. Marletta, D. Mascali, A. Massara, A. Maugeri, M. Mazzaglia, L. Neri, S. Passarello, G. Pastore, A. Seminara, A. Spartà, G. Torrisi, S. Vinciguerra
INFN/LNS, Catania, Italy
S. Di Martino, P. Nicotra
Si.A.Tel SRL, Catania, Italy

A 2.45 GHz ' 0.1 T microwave discharge Proton Source has been designed and assembled at INFN-LNS for the European Spallation Source (PS-ESS) in order to produce pulsed beams of protons up to 74 mA nominal current, at 75 keV of energy, with a transverse emittance containing 99 % of the nominal proton current below 2.25 π mm mrad and a beam stability of ± 2 %. The challenging performances of the machine have triggered specific studies on the maximization of the proton fraction inside the plasma and of the overall plasma density, including dedicated modelling of the wave-to-plasma interaction and ionization processes. The plasma conditioning phase started in July and excellent RF to plasma coupling, more than 99.5% is evident since the beginning. Reflected power fluctuation less than 0.05 % was measured providing a great starting point to reach the beam stability requested by the ESS accelerator.

Slides TUAO01 [14.571 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-TUAO01

Export •

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

TUAO05

First Plasma of the PHOENIX V3 ECR Ion Source

ion, plasma, MMI, ECR

48

T. Thuillier, J. Angot, L. Bonny, J. Jacob, T. Lamy, P. Sole
LPSC, Grenoble Cedex, France
J.L. Flambard, L. Maunoury
GANIL, Caen, France
T. Kalvas
JYFL, Jyväskylä, Finland
C. Peaucelle
IN2P3 IPNL, Villeurbanne, France

Funding: This project was partially funded by the EU Grant Agreement 283745.
PHOENIX V3 is an upgrade of the PHOENIX V2 ECR ion source granted by the European CRISP project. This new ECRIS features a larger plasma chamber and a re-duced vacuum pressure under operation. The V3 source will replace the V2 one on the SPIRAL2 accelerator in 2018. The first plasma of PHOENIX V3 was achieved on May 9th 2016. The early commissioning of the V3 source at low 18 GHz power demonstrates as expected an en-hancement of the high charge state production and Ar¹⁴⁺ intensity already exceeds the V2 one. Further enhance-ments are expected the outgassing will be achieved and the full RF power will be injected in the source.

Slides TUAO05 [7.050 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-TUAO05

Export •

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

WEPP15

Design, Construction and Commissioning of the New Superconducting Ion Source AISHa

ion, plasma, ECR, MMI

109

L. Celona, G. Castro, F. Chines, G. Ciavola, G. Costa, S. Gammino, O. Leonardi, S. Marletta, D. Mascali, F. Noto, G. Pastore, G. Torrisi, S. Vinciguerra
INFN/LNS, Catania, Italy

At INFN-LNS a new superconducting ECRIS named AISHa has been designed with the aim to provide highly charged ion beams with low ripple, high stability and high reproducibility, also fulfilling the needs of hospital installations (e.g. L-He free, easy to use, etc.). It is a hybrid ion source based on a permanent magnet hexapole providing 1.3 T on plasma chamber walls, and four superconducting coils for the axial trapping. The axial magnetic system is very flexible in order to minimize the hot electron component and to optimize the ECR heating by controlling the field gradients and the resonance length. The design of the hexapole aimed to minimize the demagnetization due to SC coils. The magnetic system measurement confirmed the effectiveness of the adopted solutions. Innovative solutions have been also implemented as it concerns the RF system design. It will permit to operate in single/double frequency mode, supported by variable frequency high power klystron generators, thus exploiting at the same time the FTE Frequency Tuning Effect and the Two Frequency Heating. The source has been assembled at the INFN-LNS site and the commissioning phase already started.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP15

Export •

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

WEPP35

Four-Dimension Transverse Phase-Space Distribution Measured by a Pepper-Pot Emittance Meter

ion, emittance, ECR, plasma

125

T. Nagatomo, O. Kamigaito, M. Kase, T. Nakagawa
RIKEN Nishina Center, Wako, Japan
J.W. Stetson
NSCL, East Lansing, Michigan, USA
V. Tzoganis
Cockcroft Institute, Warrington, Cheshire, United Kingdom

Four-dimensional (4-D) transverse emittance of the highly charged heavy ion beam extracted from ECR ion source is invariant under linear 4-D symplectic operation. Thus, it is essential quantity to improve the beam quality. Measurement of the 4-D phase-space distribution provides quantitative and essential information to improve the efficiency of beam transport. We have developed an on-line pepper-pot-type emittance meter, which is a suitable device to obtain the 4-D phase-space distribution from an image of beamlets passing through the well-aligned pinholes. The emittance meter consists of a thin metal plate with a pinhole array, which is translated along the beam axis, and an imaging screen (P46) with a MCP. We optimized the analysis procedure to obtain the distribution so that the elapsed time of the process was shortened as less than 1 second, and which was enough short for on-line measurements. We will discuss the quality of the obtained 4-D distribution by comparing it with the one obtained from a simulation. Further, we will also discuss how the gas pressure of LEBT affects the 4-D distribution to establish to improve the beam brightness.

Poster WEPP35 [2.753 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP35

Export •

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

WEPP40

Fast Sputtering Measurement Studies using Uranium with the NSCL ECR Ion Sources

ion, plasma, ECR, high-voltage

129

D.E. Neben, J. Fogleman, A.N. Pham, S. Renteria, L. Tobos
NSCL, East Lansing, Michigan, USA
D. Leitner
LBNL, Berkeley, California, USA
G. Machicoane
FRIB, East Lansing, Michigan, USA
G. Parsey
MSU, East Lansing, Michigan, USA
J.P. Verboncoeur
Michigan State University, East Lansing, Michigan, USA

Funding: Michigan State University and the National Science Foundation: NSF Award Number PHY-1415462
Existing heavy ion facilities such as the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University rely on Electron Cyclotron Resonance (ECR) ion sources as injectors of highly charged ion beams. Long ion confinement times are necessary to produce dense populations of highly charged ions because of steadily decreasing ionization cross sections with increasing charge state. To further understand ion extraction and confinement we are using a fast sputtering technique first developed at Argonne National Laboratory [1] to introduce a small amount of uranium metal into the plasma at a well-defined time. In addition we utilize an axial x-ray apparatus [2] to characterize the hot electron plasma population via its bremsstrahlung emission.
*R. Vondrasek, et. Al., Rev. Sci. Instrum. 73, 548 (2002)
**T. Ropponen, et. Al., Proceedings of ECRIS2010, Grenoble France (2010)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-ECRIS2016-WEPP40

Export •

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