| Paper |
Title |
Page |
| MOPO-01 |
Use of an ECR Ion Source for Mass Spectrometry
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55 |
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- M. A.C. Hotchkis, D. Button
ANSTO, Menai
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At ANSTO we have developed an Electron Cyclotron Resonance (ECR) ion source to investigate new concepts for mass spectrometers designed to measure isotopic ratios of elements such as carbon, nitrogen and oxygen. The low pressure ECR plasma presents particular challenges when used for mass spectrometry. The elements we are interested in measuring are typically present as residual gas in vacuum systems and hence we need to achieve ultra-high vacuum throughout our system. Also ECR plasmas generate highly reactive species of these elements which can then bond to internal surfaces. A number of measures have been taken to combat these difficulties. For example, we have shortened the plasma bottle length to minimise the surface area. In making this change we have also discovered that the useful plasma volume is much less than expected. Originally the source was designed with a mirror ratio of around 2.2. With the restricted bottle size, our effective mirror ratio is 1.7 and yet the performance of the source is unaffected. This and other design modifications will be discussed.
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Poster
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| MOPO-02 |
Beam-Profile/Emittance Measurements at the Frankfurt ECRIS
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61 |
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- K. E. Stiebing, S. Enz, Th. Kruppi
IKF, Frankfurt-am-Main
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The off-line analysis program of the Frankfurt Emittance and Profile Monitor has been improved to allow better access to the calibrated Profile- and Emittance representations. With the new system Profile / Emittance scans can be performed and directly interpreted at run time with measuring times of 2-3min per full scan. With this significantly improved performance a series of measurements has been carried out, pursuing the issue of beam filamentation in the extraction region of the 14GHZ Frankfurt ECRIS. The new program development will be presented together with results from the measurements.
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Poster
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| MOPO-03 |
Conceptual Design for a Sputter-type Negative Ion Source Based on Electron Cyclotron Resonance Plasma Heating
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64 |
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- O. A. Tarvainen, S. S. Kurennoy
LANL, Los Alamos, New Mexico
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Funding: This work was supported by the US Department of Energy under Contract Number DE-AC52-06NA25396.
A conceptual design for a negative ion source based on electron cyclotron resonance plasma heating and surface ionization is presented. The plasma chamber of the source is an rf-cavity designed for TE111 eigenmode at 2.45 GHz. The desired mode is excited with a loop-antenna. The ionization process takes place on a cesiated surface of a biased converter electrode (cathode) sputtered by plasma ions. The ion beam is 'self-extracted' through the plasma. The magnetic field of the source is optimized for both, plasma generation by ECR heating, and beam extraction. The source can be used for production of negative ions ranging from hydrogen to heavy ions. The potential users for the source concept range from large scale accelerator facilities, utilizing H- ion beams, to dc tandem accelerators for heavy ions. The benefits of the source concept compared to widely used filament- and inductively coupled rf-driven sputter-type sources are the lack of consumable parts and low neutral gas pressure minimizing the stripping losses of negative ions. In this article we will focus on the H- production scenarios with the source. The benefits and drawbacks of higher frequency operations are discussed.
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| MOPO-04 |
Status of New Electron Cyclotron Resonance Ion Sources at iThemba LABS
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68 |
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- R. W. Thomae
iThemba LABS, Somerset West
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During the last 20 years the heavy ion beams at the iThemba Laboratory for Accelerated Based Sciences were produced in a so-called 10 GHz Minimafios Electron Cyclotron Resonance Ion Source (ECRIS). In 2006 the decision was made that due to the requirements of nuclear physics for new ion species and higher particle energies- a new 3rd generation ECRIS should be procured. Therefore a source, based on the design of the Grenoble Test Source (GTS), is under construction in collaboration with the Grenoble group. It is a room temperature source that uses two microwave frequencies, 14.5 GHz and 18 GHz, to deliver highly charged ions of sufficient intensity to be accelerated in the separated-sector cyclotron to energies in the GeV range. At the same time a 14.5 GHz ECRIS4 with its beam line elements that was designed and constructed by GANIL and originally built for the Hahn-Meitner-Institute in Berlin was donated to iThemba LABS and has recently been installed. The status of the projects, future plans for new ion species development and their applications will be discussed.
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Poster
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| MOPO-05 |
First Beam of the 2.45 GHz Versatile Ion Source (VIS) for High Power Proton Accelerators
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72 |
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- S. Gammino, L. Celona, F. Chines, G. Ciavola, G. Gallo, N. Gambino, F. Maimone, D. Mascali, R. Miracoli, S. Passarello
INFN/LNS, Catania
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The Versatile Ion Source (VIS) is a permanent magnet version of the TRIPS source with a simplified and robust extraction system. It operates up to 80 kV without a bulky high voltage platform, producing multi-mA beams of protons and H2+. The description of the source design and the preliminary performance will be presented. An outline of the forthcoming developments is given, with particular care to the use of a low loss dc break and to the use of a travelling wave tube amplifier to get an optimum matching between the microwave generator and the plasma.
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| MOPO-07 |
Measurements of X-Ray Spectra on ECR-II
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73 |
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- B. Cluggish, I. N. Bogatu, J. S. Kim, L. Zhao
Far-Tech, Inc., San Diego, California
- R. C. Pardo, R. H. Scott, R. C. Vondrasek
ANL, Argonne, Illinois
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Funding: This research was performed under a U. S. Dept. of Energy SBIR grant and the Office of Nuclear Physics under contract # DE-AC02-06CH11357.
FAR-TECH, Inc. is developing a non-invasive X-ray spectral diagnostic for monitoring electron cyclotron resonance ion sources (ECRIS). The X-Ray Bremsstrahlung spectrum provides important information about the electron distribution function (EDF), which plays a key role in ionization and production of highly charge ions. To this end, FAR-TECH, Inc. has recently performed extensive measurements of X-ray emission from the ECR-II device in the ATLAS facility at Argonne National Laboratory. Our measurements indicate a significant population of electrons with energies in excess of 100 keV in ECR-II. Furthermore, we find that both the intensity and the shape of the observed spectra are highly correlated with the charge state distribution (CSD) of ions extracted from the ECR-II plasma as measured by a Faraday cup. Measurements of the X-Ray spectra and corresponding CSDs will be presented, as well as analysis of the dependence of the X-ray signal on ECR heating power, working gas pressure, spatial location of the ECR surface, and two-frequency heating. The results will be compared to simulations of ECR-II using our Generalized ECRIS Model (GEM).
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Poster
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| MOPO-08 |
High Energy Component of X-Ray Spectra in ECR Ion Sources
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77 |
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- J. Y. Benitez, D. Leitner, C. M. Lyneis, J. D. Noland, D. S. Todd
LBNL, Berkeley, California
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The 88-Inch Cyclotron at LBNL is home to three powerful ECR ion sources, which operate at a range of heating frequencies from 6.4GHz for the ECR to a combination of 18GHz and 28GHz for the VENUS superconducting ECR. Over the last few years we have investigated the production of x-rays from ECR ion sources with the goal of improving the understanding of the electron energy distribution within these sources. By measuring the spectral temperatures (defined as the reciprocal of the slope of the semi-logarithmic plot of the x-ray energy spectra) and using them as relative indicators of the electron temperatures, different plasma conditions and tuning parameters can be evaluated. A comparison of the axial x-ray spectra measured with the 6.4 GHz ECR ion source to spectra obtained using the 18 and 28GHz VENUS source at equivalent power densities will be presented. In addition, the paper will discuss the experimental setup and analysis of the x-ray measurements. In particular, we will discuss how to remove artifacts from the energy spectra resulting from the interaction of x-rays with the detector in order to accurately represent the x-rays emitted from the source.
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| MOPO-09 |
Permanent Magnet Microwave-Driven Ion Source for Neutron Generation
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85 |
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- Q. Ji, J. W. Kwan, B. A. Ludewigt, M. J. Regis
LBNL, Berkeley, California
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Funding: This work is supported by NA-22 of NNSA under the Department of Energy contract No. DE-AC02-05CH11231.
The basic principle of a neutron generator is to bombard an ion beam of either deuterium or tritium onto a target, where neutrons are produced via the D/T reactions. Compared with RF-driven and Penning Ion Sources commonly used in neutron generators, the 2.45 GHz ECR ion source has the advantages of high power efficiency, high fraction of atomic ions, low gas pressure. For portable application, the ECR source can be built with permanent magnets to minimize size. Results published by Gobin(*) and Song(**) using permanent magnets have shown current densities more than that required in neutron generator applications. In our study, we are trying to simplify the coupling between the magnetron and the plasma chamber in order to achieve either improved system efficiency or compactness. For example, in one case, a pyrex tube is inserted at the end of a wave guide as the plasma chamber. In another case, the plasma chamber has the same cross-sectional dimension as the wave guide for matching the producing of a slit beam. Results such as the current density, ion species, and plasma density profile inside the plasma chamber, as functions of microwave power and gas pressure will be presented.
* R. Gobin et al, Rev. Sci. Instrum. 77, 03B502 (2006)
** Z. Song et al, Rev. Sci. Instrum. 77, 03A305 (2006)
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| MOPO-10 |
Experience at the Ion Beam Therapy Center (HIT) with 2 Years of Continuous ECR Ion Source Operation
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86 |
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- T. Winkelmann, R. Cee, Th. Haberer, B. Naas, A. Peters, S. Scheloske
HIT, Heidelberg
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Radiotherapy with heavy ions is an upcoming cancer treatment method with to date unachieved precision. It associates higher control rates particularly for radiation resistant tumour species with reduced adverse effects compared to conventional photon therapy. This presentation will provide an overview about the project, with special attention given to the two 14.5 GHz electron cyclotron resonance (ECR) ion sources. The HIT ECR ion sources are routinely used to produce a variety of ion beams from proton up to oxygen. The runtime of these two sources are 330 days per year, our experience with two years of continuous operation will be presented, with special emphasis on stability and breakdowns of components. In addition, an outlook of further planned developments at the HIT ECR ion sources will be given.
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Poster
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| MOPO-11 |
First Experience with the Operation of the GTS-LHC Ion Source at 18 GHz
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89 |
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- D. Kuchler, M. O'Neil, R. Scrivens
CERN, Geneva
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The GTS-LHC ion source delivers the heavy ion beam, in preparation for the ion collision experiments at CERN. The source was operating up to now with a microwave frequency of 14.5 GHz, in the afterglow mode, for the commissioning of the injector chain of the LHC. Tests have been made with injection of microwaves at 18 GHz, and the first results and experience are presented in this paper.
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Poster
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| MOPO-12 |
Production of Multi-Charged Ions for Experimental Use at HIMAC
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92 |
| |
- A. Kitagawa, M. Muramatsu
NIRS, Chiba-shi
- S. Biri
ATOMKI, Debrecen
- A. G. Drentje
KVI, Groningen
- W. Takasugi, M. Wakaisami
AEC, Chiba
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Since 1994, heavy-ion radiotherapy using carbon ions is successfully carried out with the Heavy Ion Medical Accelerator in Chiba (HIMAC) at the National Institute of Radiological Sciences (NIRS). The maximum carbon ion energy is 400MeV/n. HIMAC is dedicated to radiotherapy, but it has as a second essential task to operate as users facility. In that scope it accelerates - during evening, night and weekend- many various ion species for basic experiments in biomedical science, physics, chemistry, material science, and so on. In order to serve all HIMAC users at best, the extension of the range of ion species is an important subject in ion source development at HIMAC. A PIG ion source mainly covers lighter ions from solid materials, while the 18GHz ECR ion source (called NIRS-HEC) is producing the heavier ions. Several developments on NIRS-HEC are now in progress. Various compounds are employed for the production of metallic ions by the MIVOC technique. In order to increase the beam intensity for heavier ions, additional microwave power is applied at a lower frequency by a traveling wave tube amplifier. Results of recent developments are reported.
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| MOPO-13 |
Recent Development of 18 GHz Superconducting ECRIS at RCNP
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96 |
| |
- T. Yorita, M. Fukuda, K. Hatanaka, M. Kibayashi, S. Morinobu, H. Okamura, A. Tamii
RCNP, Osaka
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The upgrade program of the AVF cyclotron is in progress since 2004 at the cyclotron facility of the RCNP, Osaka Univ., in order to improve the quality, stability and intensity of accelerated beams. A 18 GHz superconducting ECRIS has also been installed to increase beam currents and to extend the variety of ions, especially for highly charged heavy ions which can be accelerated by RCNP cyclotrons. The mirror magnetic field is produced with four liquid-helium-free superconducting coils and the permanent magnet hexapole is of Halbach type with 24 pieces of NEOMAX-44H material. The production development of several ion beams has been performed since 2006. Operational tests for beam intensity optimization have been done for 12C, 16O, 18O, 15N, 40Ar, 86Kr and so on. The MIVOC method for Boron ions has been developed as well.
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| MOPO-14 |
Ion Beam Production from Rare Isotopes with GSI ECR Ion Sources
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97 |
| |
- K. Tinschert, R. Lang, J. Maeder, J. Rossbach, P. Spaedtke
GSI, Darmstadt
- A. Yakushev
Technische Universitat Munchen, Garching
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ECR ion sources (ECRIS) of CAPRICE-type, working at 14.5 GHz, are in use at the High Charge State Injector (HLI) of the accelerator facility at GSI for beam production and at a test bench for development work. The ECRIS is mostly used to produce ion beams from rare isotopes because of its high efficiency and low material consumption. Depending on their material properties beams of rare isotopes are produced from gases, gaseous compounds, solid materials or solid compounds. Gases can be used directly, while solids have to be transformed into the gaseous state for the ECR plasma which is achieved by using resistively heated ovens. As enriched materials are produced by isotopic separation processes their composition including contamination by impurities can be of importance for the handling in the evaporation process and can be detrimental for the beam user if the ion beam contains additional ion species. Characteristics and suitable treatment of materials and production processes will be described. Experimental investigations with different sample materials and operational experiences will be reported.
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| MOPO-15 |
Permanent Magnets Under Irradiation and Radioactive Alkali Ion Beam Development for SPIRAL I
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102 |
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- M. Dubois, J. A. Alcantara Nunez, R. Alves Conde, C. Barue, C. Canet, M. Dupuis, J. L. Flambard, R. Frigot, P. Jardin, C. Leboucher, N. Lecesne, P. Lecomte, P. Leherissier, F. Lemagnen, J. Y. Pacquet, A. Pichard, M. G. Saint-Laurent
GANIL, Caen
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Up to now, eighteen Target Ion Source Systems (TISS) have been built and used for the production of radioactive ion beams on SPIRAL I facility, based on the Isotope Separator On Line method. The TISS's are composed of a helium or argon target and of the fully permanent magnet ECRIS Nanogan III. After irradiation and a period of two years for radioactive decay, the irradiated TISS is dismounted and if its magnetic field is still suitable, the magnetic systems is renewed and associated to a new target. Thereby thirty two runs have been performed using new or renewed TISS's. Sometimes, the measurement of the magnetic field after irradiation shows a degradation of the permanent magnet. The feed-back of our experience is reported here. In a second part, we present the progress on the NanoNaKE setup, which aims to extend the radioactive ion beams on SPIRAL I to the alkali elements, by associating a surface ion source to the Nanogan III ECRIS via a compact 1+ ion beam line. The main issues and difficulties are discussed and the preliminary solutions are described.
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Poster
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| MOPO-16 |
Operations of KVI AECRIS at AGOR Superconducting Cyclotron Facility
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106 |
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- V. Mironov, J. P.M. Beijers, S. Brandenburg, H. R. Kremers, J. Mulder, S. Saminathan
KVI, Groningen
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We present the status of ECRIS operation in KVI. Our work is mainly focused on improving the beam intensity and quality of highly charged ions for injection into the AGOR cyclotron. The main request was for Ne6+ ions to produce short-lived 21Na for fundamental physics studies. Typical beam intensities are 350 eμA. Several other ion beams were produced, e.g. C2+, C4+, C6+ and F4+. Overall performance of the source met the user requirements. We recently started again with Pb ion production, resulting in 25 eμA of Pb27+. Source output was gradually optimized, mainly by installing stainless steel screens at the injection and extraction sides of the ion source. A two-frequency heating system (14.5 + 12.5 GHz) has been installed and the first results will be presented.
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| MOPO-17 |
Operational Experience with the HTS-ECRIS, PKDELIS
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107 |
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- G. Rodrigues, D. Kanjilal, P. Kumar, P. S. Lakshmy, A. Mandal
IUAC, New Delhi
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The high temperature superconducting electron cyclotron resonance ion source (HTS-ECRIS), PKDELIS is in operation since June, 2004. The cryo-coolers have completed about 25000 hours of operation. There were some initial problems with one of the two cryo-coolers for the axial HTS coils, beam extraction and transmission systems at the intermediate location for test run. These were rectified subsequently. Proper X-ray shielding for safe operation were incorporated. X-ray Bremstrahlung measurements on the injection and extraction as a function of negative DC bias voltage are carried out systematically to develop deeper understanding of the ECR plasma production processes. A soft-landing system is developed for studies in charge exchange collisions and potential sputtering. The source and low energy beam transport (LEBT) system is planned to be re-installed on a high voltage platform in the new beam hall III to prepare for injection into high current injector of the superconducting linear accelerator. Recent results of the PKDELIS, operational experience and details of LEBT will be reported.
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| MOPO-18 |
Microwave Power Saving and Reduced Bremsstrahlung Emission for a High Charge State Ion Production in an ECRIS Equipped with MD Structures
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111 |
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- L. Schachter, S. Dobrescu
IFIN, Magurele- Bucuresti
- K. E. Stiebing
IKF, Frankfurt-am-Main
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Metal dielectric structures (MD) installed in the plasma chamber of the Frankfurt 14GHz electron cyclotron resonance ion source (ECRIS), have been used to significantly reduce the level of microwave power, necessary to create comparable ion intensities as for the standard operation of the Frankfurt ECRIS. The measurements indicate that the RF-power may be reduced by a factor of 2-3 to obtain the same output of high argon charge states as in the standard source with stainless steel plasma chamber. This reduced level of microwave power also leads to a much lower level of X-ray emission from the source.
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Poster
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| MOPO-19 |
Optimization of Gasdynamic ECR Ion Sources
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114 |
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- V. Zorin, I. Izotov, V. Skalyga
IAP/RAS, Nizhny Novgorod
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Funding: The work was done under financial support of the ISTC, grant # 2753, the Program PICS CNRS-RFBR, grants # 06-02-22002, and the RFBR, grant #08-02-00531.
The current work is a continuation of the study of gasdynamic ECR ion sources (ReGIS). The main difference of these sources from classical Geller ECR ion sources is the use of the quasi-gasdynamic regime of plasma confinement in magnetic traps. A possibility of ion beam formation in REGIS with total current of 100 mA and higher was demonstrated in *. Such currents are attained due to small longitudinal lifetime in the quasi-gasdynamic regime of confinement. A drawback of ReGIS is low average ion charge. In the current work possible ways of increasing ion charge are demonstrated. Based on the model described in ** a magnetic trap is optimized and microwave radiation power required for producing a preset average charge is analyzed. The computations are compared with data of experiments. A variant of a magnetic trap and microwave pump designed to obtain pulsed beams of Ar+5 and Xe +15 ions with currents of tens of MA was proposed.
* A. Sidorov, M. Dorf, V. Zorin, P. Spadtke, et al. Rev. of Sci. Instrum. 79, 02A317 (2008)
** V. Semenov, V. Skalyga, A. Smirnov, V. Zorin. Rev. of Sci. Instrum. v. 73, #2, p. 635. 2002
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| MOPO-20 |
High Intensity Helium Beam at CEA/Saclay
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115 |
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- R. Gobin, O. Delferriere, F. Harrault, B. Pottin, O. Tuske
CEA, Gif-sur-Yvette
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The Spiral 2 injector will be first built, installed and tested at CEA Saclay before its transfer to Caen. The RFQ has been designed to accelerate different particles: protons, deuterons and q/A = 1/3 heavy ions. The A-Phoenix ion source developed and tested at LPSC Grenoble will be directly transferred to Ganil. So to test the q/A = 1/3 ions acceleration with the RFQ built at Saclay, the light ion ECR source has been thought capable to produce 3He+ ions. Moreover, high intensity 3He ion beam accelerator applications are possible in other domains such as astrophysics or neutrino factory. The SILHI source has been fed with natural helium (4He) gas for several hours. Beam intensity as high as 20 mA (870 Am-2 through 4.8 mm diameter aperture) has been extracted from the source with 85 keV energy. Extensive experiments will be done with the 9 mm diameter nominal plasma electrode to characterize the He+ extracted beam. With the same extracted beam density, total beam intensity in the range of 100 mA seems reachable. In addition, simulations of the beam extraction will be done to estimate possible electrode modifications in order to improve the beam transport.
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| MOPO-21 |
Modeling ECRIS Plasma Using 2D GEM (General ECRIS Model)
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116 |
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- L. Zhao, B. Cluggish, J. S. Kim
Far-Tech, Inc., San Diego, California
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Funding: Work is supported by US DOE SBIR DE-FG02-04ER83954.
The GEM (General ECRIS Model) code is developed by FAR-TECH, Inc. to model plasmas in ECRIS devices using only experimental knobs such as magnetic field, rf and the geometry of the device. The code models ECRIS plasma electrons by the bounce-averaged Fokker-Planck equation, ions as fluid and neutrals by particle balancing. It has been extended to include 2D (axial and radial) spatial features such as 2D ECR heating and ion radial diffusion. The convergence and consistency of the code have been studied. It is parallelized using the MPI technique to boost the calculation speed. Examples of 2D profiles of ECRIS plasmas and the radial dependence of CSD (charge state distribution) will be presented. Also, GEM 2D is merged with the MCBC (Monte Carlo Beam Capture) code to optimize ECR charge breeders. Results of the GEM 2D code and comparisons of GEM 2D and GEM 1D results will be presented.
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Poster
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| MOPO-22 |
Wall Distribution of Ions Externally Injected for Charge-Breeding in ECRIS
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120 |
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- M. Oyaizu, S. Arai, M. Okada
KEK, Ibaraki
- Y. Fuchi, Y. Hirayama, N. Imai, H. Ishiyama, S. C. Jeong, H. Miyatake, Y. Watanabe
KEK, Tokai Branch, Tokai, Naka, Ibaraki
- S. Ichikawa, H. Kabumoto, M. Matsuda, A. Osa, Y. Otokawa
JAEA, Ibaraki-ken
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We have successfully converted the singly charged ions of short-lived radioactive nuclei as well as of stable nuclei into the multi-charged ions with the charge-to-mass ratio of about 1/7, by employing KEKCB, an 18GHz ECR charge breeder at TRIAC (Tokai Radioactive Ions Accelerator Complex). However, we observed large difference in charge breeding between gaseous and non-gaseous ion species, i.e. in the injection optics and the resultant charge breeding efficiencies. In order to understand the difference, we investigated how the ions, externally injected to the ECR plasma of KEKCB for breeding their charge states but failed to be re-extracted, were distributed on the wall (surface) of the plasma chamber. To investigate the distribution, we had injected and charge-bred radioactive singly-charged 111In ions with a half-life of 2.9 days. After the operation, we extracted the distribution of the 111In by measuring the residual activity on the wall of the chamber. We have observed an azimuthally asymmetric distribution around the Bmin of axial field configuration on the top of rather symmetric and isotropic distribution, which will be discussed in detail at the workshop.
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Poster
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| MOPO-23 |
New Spindle Cusp ZERO-B Field for ECR Ion and Plasma Sources
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123 |
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- M. H. Rashid, R. K. Bhandari, C. Mallik
DAE/VECC, Calcutta
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A traditional ECR ion source (ECRIS) or plasma source use magnetic min-B field for plasma containment and energizing electrons based on the principle of the ECR process. A cusp field produces modified min-B or zero-B field. A new cusp field configurations (CFC) with symmetric field at the cusp positions, corresponding to a given RF frequency confirming the standard model, is simulated to contain large volume high density plasma for producing beam for low or high charged ion. The magnetic field increases along and across the magnetic lines of force starting from zero at the centre and maximum value at the periphery. The cusp field with convex lines of force towards the plasma is ideal for confining it as drift of the particles take place either in the azimuth or towards the low field region at the centre. Non-adiabatic behaviour of electrons at the centre is either tackled by gas-dynamic confinement at high density or exploited to generate more secondary electrons. Confinement feature of the field is assessed by electron simulation. A new technically viable cusp ECRIS has a bright prospect ahead as it is simple, stable, compact and cost-effective compared to the traditional ECRIS.
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| MOPO-24 |
High-Resolution Beam-Profile Measurements with a Faraday-Cup Array
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126 |
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- L. Panitzsch, C. Helmke, L. Seimetz, M. Stalder, R. F. Wimmer-Schweingruber
IEAP, Kiel
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The division of extraterrestrial physics at the University of Kiel is establishing a solar wind and supra-thermal particle laboratory which will be used mainly for three reasons: the calibration of space instruments dedicated to measure the solar wind and/or supra-thermal particles, the research of space weathering of dust particles and to study fundamental plasma physics. The laboratory will be able to generate a well-defined and highly charged ion beam at energies from 1 to 450keV/q. Both, calibration of space instruments and dust particle bombardment, need accurate values for the main beam parameters such as current, position, and profile. While the total current is measured by a single Faraday cup (FC), position and profile of the ion beam are acquired by an array of 44 tiny (0.3 mm diameter) Faraday-Cups (FCA) moving through the beam. This allows high resolution of beam current and position, as well as high durability since beam-currents from several hundred pA to a few mA and an incident beam power up to 40W are expected. Here, we present the basics of the detectors hard- and software design in addition to some first results of measurements.
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Poster
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