ECRIS2010 - List of Authors (Villari, A.C.C.)

Paper

Title

Page

PK-ISIS: a New Superconducting ECR Ion Source at Pantechnik

26

A.C.C. Villari, C. Bieth, W. Bougy, B.N. Brionne, X. Donzel, G. Gaubert, R. Leroy, A. Sineau, O. Tasset, C. Vallerand
PANTECHNIK, BAYEUX, France
T. Thuillier
LPSC, Grenoble, France

The new ECR ion source PK-ISIS was recently commissioned at Pantechnik. Three superconducting coils generate the axial magnetic field configuration while the radial magnetic field is done with multi-layer permanent magnets. Special care was devoted in the design of the hexapolar structure, allowing a maximum magnetic field of 1.32 T at the wall of the 82 mm diameter plasma chamber. The three superconducting coils using Low Temperature Superconducting wires are cooled by a single double stage cryo-cooler (4.2 K). Cryogen-free technology is used, providing reliability, easy maintenance at low cost. The maximum installed RF power (18.0 GHz) is of 2 kW. Metallic beams can be produced with an oven (Tmax = 1400 °C) installed with an angle of 5° with respect to the source axis or a sputtering system, mounted in the axis of the source. The beam extraction system is constituted of three electrodes in accel-decel configuration. Description of the source and results of the magnetic measurements will be given. Performances of the source in terms of beam intensities and charge states distribution will be presented.

Slides MOCOCK01 [3.226 MB]

MOPOT005

High Current Production with 2.45 GHz ECR Ion Source

50

A. Coly, T. Lamy, T. Thuillier
LPSC, Grenoble, France
G. Gaubert, A.C.C. Villari
PANTECHNIK, BAYEUX, France

A new test bench has been installed at LPSC dedicated to 2.45 GHz ECR Ion Sources characterization. Several magnetic structures have been tested around the same plasma cavity. For example, a current density of 70 mA/cm² has been measured with the MONO1000 source lent by GANIL. An original ECRIS, named SPEED (for 'Source d'ions à aimants PErmanents et Extraction Dipôlaire'), presenting a dipolar magnetic field at the extraction will also be presented.

Poster MOPOT005 [3.130 MB]

TUPOT006

Using Mass-Flow Controllers for Obtaining Extremely Stable ECR Ion Source Beams

127

X. Donzel, W. Bougy, B.N. Brionne, G. Gaubert, A. Sineau, O. Tasset, C. Vallerand, A.C.C. Villari
PANTECHNIK, BAYEUX, France
R. Leroy
GANIL, Caen, France

Beam stability and reproducibility is of paramount importance in applications requiring precise control of implanted radiation dose, like in the case of Hadrontherapy. The beam intensity over several weeks or months should be kept constant. Moreover, the timing for changing the nature of the beam and, as a consequence, the tuning of the source should be minimized. Standard valves usually used in conjunction of ECR ion sources have the disadvantage of controlling the conductance, which can vary significantly with external conditions, like ambient temperature and inlet pressure of the gas. The use of flow controllers is the natural way for avoiding these external constraints. In this contribution we present the results obtained using a new model of Mass-flow controller in the source Supernanogan, for production of C⁴⁺ and H³⁺ beams. Extremely stable beams (± 2.5%) without retuning of the source over several weeks could be obtained. The reproducibility of the source tuning parameters could also be demonstrated.

Poster TUPOT006 [4.386 MB]

MOCOCK05

Multigan®: a New Multicharged Ion Source Based on Axisymetric Magnetic Structure

37

L. Maunoury, P. Delahaye, M. Dubois, P. Jardin, P. Lehérissier, M. Michel, J.Y. Pacquet
GANIL, Caen, France
S. Biri
ATOMKI, Debrecen, Hungary
X. Donzel, G. Gaubert, R. Leroy, A.C.C. Villari
PANTECHNIK, BAYEUX, France
C. Pierret
CIMAP, Caen, France

Standard ECR ion sources have radial magnetic field created by a multi-pole, e.g. hexapole or higher order, which fills all space in the center of the source structure. Based on the Monogan® ECRIS [1] concept, a new multicharged ECR ions source has been designed with a large opening space in the center of the source structure. This particular design allows, in a first approach, direct radial contact with the ECR plasma, allowing positioning of probes and targets for radioactive beam production very close to the plasma region. Secondly, the absence of a multi-pole allows considering extremely high magnetic fields with significantly smaller structural constraints. This source is combining the advantages of the axisymetric magnetic feature of Monogan® with higher frequencies. This paper will describe the magnetic structure calculation as well as the mechanical design and stresses of a full permanent magnet ion source using this concept. This source will be the first prototype of such an ECR ion source. Finally, using TrapCad code [2], an estimation of the electronic energy distribution has been calculated and thus, the performance of the source has been deduced. The beam formation and extraction were also roughly calculated taking into account magnetic and electric fields.
[1] P. Jardin et al., Review of Scientific Instruments, 73, 789 (2002).
[2] L. Maunoury et al., Plasma Sources Science and Technology , 18, 015019 (2009).

Slides MOCOCK05 [5.532 MB]

TUPOT004

Microgan ECR Ion Source in a Van de Graaff Accelerator Terminal

120

G. Gaubert, C. Bieth, W. Bougy, B.N. Brionne, X. Donzel, A. Sineau, O. Tasset, C. Vallerand, A.C.C. Villari
PANTECHNIK, BAYEUX, France
C. Chavez-de-Jesus, T. Gamboni, W. Geerts, G. Giorginis, R. Jaime Tornin, G. Lövestam, W. Mondelaers
JRC/IRMM, Geel, Belgium

The Van de Graaff accelerator at IRMM works since many years providing proton, deuteron and helium beams for nuclear data measurements. The original ion source was of RF type with quartz bottle. This kind of source, as well known, needs regular maintenance for which the accelerator tank must be completely opened. The heavy usage at high currents of the IRMM accelerator necessitated an opening about once every month. Recently, the full permanent magnet Microgan ECR ion source from PANTECHNIK was installed into a new terminal platform together with a solid state amplifier of 50W, a dedicated dosing system for 4 gases (with respective gas bottles H2, D2, He and Ar), and a set of dedicated power supplies and electronic devices for the remote tuning of the source. The new system shows a very stable behavior of the produced beam allowing running the Van de Graff without maintenance for several months. This contribution will describe the full installed system in details (working at high pressure in the terminal, spark effects and optic of the extraction).

Poster TUPOT004 [1.715 MB]

Paper	Title	Page
MOCOCK01	PK-ISIS: a New Superconducting ECR Ion Source at Pantechnik	26
	A.C.C. Villari, C. Bieth, W. Bougy, B.N. Brionne, X. Donzel, G. Gaubert, R. Leroy, A. Sineau, O. Tasset, C. Vallerand PANTECHNIK, BAYEUX, France T. Thuillier LPSC, Grenoble, France
	The new ECR ion source PK-ISIS was recently commissioned at Pantechnik. Three superconducting coils generate the axial magnetic field configuration while the radial magnetic field is done with multi-layer permanent magnets. Special care was devoted in the design of the hexapolar structure, allowing a maximum magnetic field of 1.32 T at the wall of the 82 mm diameter plasma chamber. The three superconducting coils using Low Temperature Superconducting wires are cooled by a single double stage cryo-cooler (4.2 K). Cryogen-free technology is used, providing reliability, easy maintenance at low cost. The maximum installed RF power (18.0 GHz) is of 2 kW. Metallic beams can be produced with an oven (Tmax = 1400 °C) installed with an angle of 5° with respect to the source axis or a sputtering system, mounted in the axis of the source. The beam extraction system is constituted of three electrodes in accel-decel configuration. Description of the source and results of the magnetic measurements will be given. Performances of the source in terms of beam intensities and charge states distribution will be presented.
	Slides MOCOCK01 [3.226 MB]

MOPOT005	High Current Production with 2.45 GHz ECR Ion Source	50
	A. Coly, T. Lamy, T. Thuillier LPSC, Grenoble, France G. Gaubert, A.C.C. Villari PANTECHNIK, BAYEUX, France
	A new test bench has been installed at LPSC dedicated to 2.45 GHz ECR Ion Sources characterization. Several magnetic structures have been tested around the same plasma cavity. For example, a current density of 70 mA/cm² has been measured with the MONO1000 source lent by GANIL. An original ECRIS, named SPEED (for 'Source d'ions à aimants PErmanents et Extraction Dipôlaire'), presenting a dipolar magnetic field at the extraction will also be presented.
	Poster MOPOT005 [3.130 MB]

TUPOT006	Using Mass-Flow Controllers for Obtaining Extremely Stable ECR Ion Source Beams	127
	X. Donzel, W. Bougy, B.N. Brionne, G. Gaubert, A. Sineau, O. Tasset, C. Vallerand, A.C.C. Villari PANTECHNIK, BAYEUX, France R. Leroy GANIL, Caen, France
	Beam stability and reproducibility is of paramount importance in applications requiring precise control of implanted radiation dose, like in the case of Hadrontherapy. The beam intensity over several weeks or months should be kept constant. Moreover, the timing for changing the nature of the beam and, as a consequence, the tuning of the source should be minimized. Standard valves usually used in conjunction of ECR ion sources have the disadvantage of controlling the conductance, which can vary significantly with external conditions, like ambient temperature and inlet pressure of the gas. The use of flow controllers is the natural way for avoiding these external constraints. In this contribution we present the results obtained using a new model of Mass-flow controller in the source Supernanogan, for production of C⁴⁺ and H³⁺ beams. Extremely stable beams (± 2.5%) without retuning of the source over several weeks could be obtained. The reproducibility of the source tuning parameters could also be demonstrated.
	Poster TUPOT006 [4.386 MB]

MOCOCK05	Multigan®: a New Multicharged Ion Source Based on Axisymetric Magnetic Structure	37
	L. Maunoury, P. Delahaye, M. Dubois, P. Jardin, P. Lehérissier, M. Michel, J.Y. Pacquet GANIL, Caen, France S. Biri ATOMKI, Debrecen, Hungary X. Donzel, G. Gaubert, R. Leroy, A.C.C. Villari PANTECHNIK, BAYEUX, France C. Pierret CIMAP, Caen, France
	Standard ECR ion sources have radial magnetic field created by a multi-pole, e.g. hexapole or higher order, which fills all space in the center of the source structure. Based on the Monogan® ECRIS [1] concept, a new multicharged ECR ions source has been designed with a large opening space in the center of the source structure. This particular design allows, in a first approach, direct radial contact with the ECR plasma, allowing positioning of probes and targets for radioactive beam production very close to the plasma region. Secondly, the absence of a multi-pole allows considering extremely high magnetic fields with significantly smaller structural constraints. This source is combining the advantages of the axisymetric magnetic feature of Monogan® with higher frequencies. This paper will describe the magnetic structure calculation as well as the mechanical design and stresses of a full permanent magnet ion source using this concept. This source will be the first prototype of such an ECR ion source. Finally, using TrapCad code [2], an estimation of the electronic energy distribution has been calculated and thus, the performance of the source has been deduced. The beam formation and extraction were also roughly calculated taking into account magnetic and electric fields. [1] P. Jardin et al., Review of Scientific Instruments, 73, 789 (2002). [2] L. Maunoury et al., Plasma Sources Science and Technology , 18, 015019 (2009).
	Slides MOCOCK05 [5.532 MB]

TUPOT004	Microgan ECR Ion Source in a Van de Graaff Accelerator Terminal	120
	G. Gaubert, C. Bieth, W. Bougy, B.N. Brionne, X. Donzel, A. Sineau, O. Tasset, C. Vallerand, A.C.C. Villari PANTECHNIK, BAYEUX, France C. Chavez-de-Jesus, T. Gamboni, W. Geerts, G. Giorginis, R. Jaime Tornin, G. Lövestam, W. Mondelaers JRC/IRMM, Geel, Belgium
	The Van de Graaff accelerator at IRMM works since many years providing proton, deuteron and helium beams for nuclear data measurements. The original ion source was of RF type with quartz bottle. This kind of source, as well known, needs regular maintenance for which the accelerator tank must be completely opened. The heavy usage at high currents of the IRMM accelerator necessitated an opening about once every month. Recently, the full permanent magnet Microgan ECR ion source from PANTECHNIK was installed into a new terminal platform together with a solid state amplifier of 50W, a dedicated dosing system for 4 gases (with respective gas bottles H2, D2, He and Ar), and a set of dedicated power supplies and electronic devices for the remote tuning of the source. The new system shows a very stable behavior of the produced beam allowing running the Van de Graff without maintenance for several months. This contribution will describe the full installed system in details (working at high pressure in the terminal, spark effects and optic of the extraction).
	Poster TUPOT004 [1.715 MB]