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Design And Testing Of An Electron Cyclotron Resonance Heating Ion Source For Use In High Field Compact Superconducting Cyclotrons
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Book Synopsis Design and Testing of an Electron Cyclotron Resonance Heating Ion Source for Use in High Field Compact Superconducting Cyclotrons by : Mark E. Artz
Download or read book Design and Testing of an Electron Cyclotron Resonance Heating Ion Source for Use in High Field Compact Superconducting Cyclotrons written by Mark E. Artz and published by . This book was released on 2012 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this project is to evaluate the feasibility of axial injection of a high brightness beam from an Electron Cyclotron Resonance ion source into a high magnetic field cyclotron. Axial injection from an ion source with high brightness is important to reduce particle losses in the first several turns of acceleration within the cyclotron. Beam brightness is a measure of the beam current and rate of spread of the beam. The ultimate goal in developing an ECR ion source is to enable reduced beam losses along the entire acceleration path from the ion source through the cyclotron, allowing for a high beam current accelerator. Cyclotrons with high beam current have the potential to improve the availability of proton radiation therapy. Proton radiation therapy is a precisely targeted treatment capable of providing an excellent non-invasive treatment option for tumors located deep within tissue. In order to model injection into high field it is necessary to measure the parameters of the beam extracted from the ion source. The two most important beam parameters are emittance and beam current. The emittance of the beam is a measurement of the rate of beam spread along the path of the beam and beam current is a measurement of the energy and quantity of particles within a charged particle beam. This thesis presents the design and analysis of an ECR Ion Source and the instruments used to measure the emittance and beam current. Based on the modeling of the ECR ion source beam and the data gathered during testing, the ECR ion source presented in this thesis has the potential to provide a high brightness beam capable of high field axial injection. Beam simulations provide insight into the performance of the ECR ion source in high magnetic field. Axial beam injection from an external ion source is promising with moderate refinements to the ECR ion source.
Book Synopsis The Design and Testing of a Compact Electron Cyclotron Resonant Microwave-cavity Ion Source by : Leonard Joseph Mahoney
Download or read book The Design and Testing of a Compact Electron Cyclotron Resonant Microwave-cavity Ion Source written by Leonard Joseph Mahoney and published by . This book was released on 1989 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Electron Cyclotron Resonance Ion Sources and ECR Plasmas by : R Geller
Download or read book Electron Cyclotron Resonance Ion Sources and ECR Plasmas written by R Geller and published by Routledge. This book was released on 2018-12-13 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Acknowledged as the "founding father" of and world renowned expert on electron cyclotron resonance sources Richard Geller has produced a unique book devoted to the physics and technicalities of electron cyclotron resonance sources. Electron Cyclotron Resonance Ion Sources and ECR Plasmas provides a primer on electron cyclotron phenomena in ion sour
Book Synopsis ECR (Electron Cyclotron Resonance) Ion Sources for Cyclotrons by :
Download or read book ECR (Electron Cyclotron Resonance) Ion Sources for Cyclotrons written by and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the last decade ECR (Electron Cyclotron Resonance) ion sources have evolved from a single large, power consuming, complex prototype into a variety of compact, simple, reliable, efficient, high performance sources of high charge state ions for accelerators and atomic physics. The coupling of ECR sources to cyclotrons has resulted in significant performance gains in energy, intensity, reliability, and variety of ion species. Seven ECR sources are in regular operation with cyclotrons and numerous other projects are under development or in the planning stag. At least four laboratories have ECR sources dedicated for atomic physics research and other atomic physics programs share ECR sources with cyclotrons. An ECR source is now installed on the injector for the CERN SPS synchrotron to accelerate O/sup 8 +/ to relativistic energies. A project is underway at Argonne to couple an ECR source to a superconducting heavy-ion linac. Although tremendous progress has been made, the field of ECR sources is still a relatively young technology and there is still the potential for further advances both in source development and understanding of the plasma physics. The development of ECR sources is reviewed. The important physics mechanisms which come into play in the operation of ECR Sources are discussed, along with various models for charge state distributions (CSD). The design and performance of several ECR sources are compared. The 88-Inch Cyclotron and the LBL ECR is used as an example of cyclotron+ECR operation. The future of ECR sources is considered.
Book Synopsis Electron Cyclotron Emission And Electron Cyclotron Resonance Heating (Ec-16) - Proceedings Of The 16th Joint Workshop (With Cd-rom) by : Ronald Prater
Download or read book Electron Cyclotron Emission And Electron Cyclotron Resonance Heating (Ec-16) - Proceedings Of The 16th Joint Workshop (With Cd-rom) written by Ronald Prater and published by World Scientific. This book was released on 2011-02-21 with total page 427 pages. Available in PDF, EPUB and Kindle. Book excerpt: This proceedings volume, the sixteenth in a biannual series, presents a snapshot of the state of current research worldwide on Electron Cyclotron Emission (ECE) and Electron Cyclotron Resonance Heating (ECRH) and related technologies. The papers address the physics, both theory and experiment, of ECE and ECRH. The technologies of high power millimeter-wave sources — gyrotrons — and transmission lines and launchers are included. The focus is on physics and technology relevant to the research and development of nuclear fusion.
Book Synopsis Electron Cyclotron Emission And Electron Cyclotron Resonance Heating (Ec-15) - Proceedings Of The 15th Joint Workshop (With Cd-rom) by : John Lohr
Download or read book Electron Cyclotron Emission And Electron Cyclotron Resonance Heating (Ec-15) - Proceedings Of The 15th Joint Workshop (With Cd-rom) written by John Lohr and published by World Scientific. This book was released on 2009-04-15 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings present the latest results in electron cyclotron emission, heating and current drive, with an emphasis on the physics and technology of Electron Cyclotron Emission, Electron Cyclotron Heating and Electron Cyclotron Current Drive applied to magnetic fusion research. The field is a key element in the development of fusion power and the ITER project now under construction.
Book Synopsis Electron Cyclotron Resonance Ion Sources by : Matthaeus Leitner
Download or read book Electron Cyclotron Resonance Ion Sources written by Matthaeus Leitner and published by American Institute of Physics. This book was released on 2005-03-23 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Berkeley, California, 26-30 September 2004
Book Synopsis Electron Cyclotron Emission And Electron Cyclotron Heating (Ec12), Proceedings Of The 12th Joint Workshop by : Gerardo Giruzzi
Download or read book Electron Cyclotron Emission And Electron Cyclotron Heating (Ec12), Proceedings Of The 12th Joint Workshop written by Gerardo Giruzzi and published by World Scientific. This book was released on 2003-02-21 with total page 613 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 12th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC-12) was held in Aix-en-Provence (France) from May 13 to 16, 2002. This workshop was concerned with the interaction of electromagnetic waves and hot plasmas, a subject of great importance in the framework of research on controlled thermonuclear fusion. Using as a fuel a mixture of deuterium and tritium, which can be extracted from sea water, this is a very promising way to develop an intrinsically safe reactor. The workshop gathered approximately one hundred specialists in the production, use and theory of millimetre waves for heating and diagnostics of fusion plasmas.
Book Synopsis An Ultra Compact 10 GHz Electron-cyclotron-resonance Ion Source (ECRIS) for the Production of Multiply Charged Ions by :
Download or read book An Ultra Compact 10 GHz Electron-cyclotron-resonance Ion Source (ECRIS) for the Production of Multiply Charged Ions written by and published by . This book was released on 2001 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a growing interest in the use of beams of multiply charged ions produced in special environments like high voltage platforms, Dynamitrons, Van-de-Graaff accelerators or on-line production systems for radioactive beam facilities. A compact 10 GHz ECR ion source (200 mm long, 170 mm diameter) has been developed and tested. The complete magnetic structure made from permanent magnet material is comprised of four ring magnets producing an asymmetric axial magnetic field with a mirror ratio of 2.5 and a 24 piece hexapole magnet with a maximum radial field of 0.94 T inside the plasma chamber of 25 mm inner diameter. The coupling of the microwave to the plasma using a resonant transition line from rectangular to circular waveguide shows efficient ECR plasma heating at microwave power levels around 10 watts. Charge state distributions for various elements with intensities up to 320 e[mu]A and their dependence on operation parameters will be presented as well as VUV spectra in the wavelength region down to 15 nm.
Book Synopsis Proceedings of the Fifteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating by : John Lohr
Download or read book Proceedings of the Fifteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating written by John Lohr and published by World Scientific. This book was released on 2009 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings present the latest results in electron cyclotron emission, heating and current drive, with an emphasis on the physics and technology of Electron Cyclotron Emission, Electron Cyclotron Heating and Electron Cyclotron Current Drive applied to magnetic fusion research. The field is a key element in the development of fusion power and the ITER project now under construction.
Book Synopsis Properties of Electron Cyclotron Resonance Plasma Sources by : Aseem Kumar Srivastava
Download or read book Properties of Electron Cyclotron Resonance Plasma Sources written by Aseem Kumar Srivastava and published by . This book was released on 1995 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress Report Proton Cyclotron R.f. Group by :
Download or read book Progress Report Proton Cyclotron R.f. Group written by and published by . This book was released on 1947 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Perturbative Measurements of Electron Cyclotron Resonance Ion Source Plasmas by : Derek Elwin Neben
Download or read book Perturbative Measurements of Electron Cyclotron Resonance Ion Source Plasmas written by Derek Elwin Neben and published by . This book was released on 2019 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Heavy ion accelerators are a valuable resource for the nuclear science community to study atomic physics. One such heavy ion accelerator is the Coupled Cyclotron Facility (CCF) at the National Superconducting Cyclotron Laboratory (NSCL) which relies on Electron Cyclotron Resonance (ECR) ion sources to provide the primary beam to the target. ECR ion sources are essential for the efficient operation of research accelerators such as the CCF, providing high currents of highly charged ions. Highly charged ion beams increase the efficiency of the accelerators, but require longer confinement times and higher temperature plasmas in the ion sources than is necessary to produce singly charged beams. The need to use high temperature and low density plasmas creates challenges including those relating to plasma stability. ECR ion sources provide a good platform to accept metallic vapor ovens and sputtering probes allowing the CCF to accelerate up to 30 types of beams ranging from oxygen to uranium. Furthermore, ECR ion sources use no filaments or cathodes providing a high degree of reliability for the accelerator facility. As the intensity frontier demands ever rarer isotopes from accelerator facilities, the heavy ion beam intensity must increase [70], which creates new demands from the ion sources.The work presented within this dissertation set out to better understand the mechanism that confines highly charged ions in the ECR plasma. Specifically, it was explored if hot electrons (energy larger than 50 keV) contribute to ion confinement by generating an electrostatic well in the plasma potential [68]. Perturbative measurements of ECR ion sources are presented with the aim to explore ion confinement times: pulsed sputtering (Chapter 4) and amplitude modulation (Chapter 5). Chapter 3 explores the geometry of the sputtering probe with respect to the magnetic field which was crucial to produce reliable pulsed sputtering results on the ECR ion source. Axial pulsed sputtering, which could be conveniently implemented on fully superconducting sources, incorporated a bias disc effect that highly perturbed the plasma. Radial sputtering was emulated by placing a semi-shielded probe along the plasma chamber wall in between the electron loss surfaces.Ion confinement time was characterized through the decay time of the beam current, which is proportional to ion confinement time. Ion beam decay times were measured for different charge states of gold in an oxygen plasma in Chapter 4. Decay time always increased with increasing charge state. Decay time also increased with hot electron temperature for lower frequency operation (13 GHz), but reached an optimized value for higher frequency operation (18 GHz) due to plasma instabilities. Electrostatic confinement of ions appeared to be the most plausible mechanism to explain the observed decay time behaviors. A novel perturbative measurement technique was developed for ECR ion sources using Amplitude Modulation (AM) of microwave power. The AM measurement was originally motivated by whether or not 50~kHz modulation in microwave power (from the microwave source) would be observable in the beam current. A systematic study was organized on the University of Jyvaskyla Physics Department (JYFL) normal conducting ECR ion source in Jyvaskyla Finland. Chapter 5 presents the beam current response to AM on the 14 GHz ECR ion source for different weights of noble gases, magnetic fields, and vacuum pressures. The beam current amplitude generally decayed exponentially for frequencies higher than around 400 Hz with the modulation highly suppressed at 10 kHz.
Book Synopsis Cyclotrons And Their Applications - Proceedings Of The13th International Conference, Vancouver, 1992 by : G Dutto
Download or read book Cyclotrons And Their Applications - Proceedings Of The13th International Conference, Vancouver, 1992 written by G Dutto and published by World Scientific. This book was released on 1993-01-08 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume describes the latest developments in the design, construction and operation of cyclotrons, from compact machines producing intense beams for isotope production, cancer therapy and industrial use, to the larger versions giving higher energy beams of ions of various elements for nuclear and particle physics. Important topics include ECR ion sources, superconducting magnets and radiofrequency cavities, beam dynamics and diagnostics, beam cooling rings, control systems and various medical and industrial applications.
Book Synopsis Proceedings of the Fifteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating by : John Lohr
Download or read book Proceedings of the Fifteenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating written by John Lohr and published by World Scientific. This book was released on 2009 with total page 583 pages. Available in PDF, EPUB and Kindle. Book excerpt: These proceedings present the latest results in electron cyclotron emission, heating and current drive, with an emphasis on the physics and technology of Electron Cyclotron Emission, Electron Cyclotron Heating and Electron Cyclotron Current Drive applied to magnetic fusion research. The field is a key element in the development of fusion power and the ITER project now under construction.
Book Synopsis Conceptual Design of a Gyrotron-driven Superconducting ECR Ion Source by :
Download or read book Conceptual Design of a Gyrotron-driven Superconducting ECR Ion Source written by and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The conceptual design for a superconducting Electron Cyclotron Resonance Ion Source (ECRIS) is presented. It is designed to take advantage of frequency scaling in ECRIS and be driven at 28 GHz by a laboratory scale gyrotron. The superconducting coils are surrounded by a warm bore iron yoke. Possible applications include cyclotrons, heavy-ion synchrotrons, ion implantation in semiconductors, and experiments in atomic physics. 10 refs., 5 figs., 1 tab.
Download or read book SWISSCASE written by Michael Bodendorfer and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2009 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ions are atoms that have lost or gained one or more electrons, providing the ions with a negative or a positive charge. Unlike bound ions found in solutions, free ions are very rare on Earth but are abundantly found in interplanetary space and cometary atmospheres. Ground based ion sources, which produce free ions to simulate these science targets, are used to calibrate space flight instruments on Earth prior to flight. In order to provide a brighter and more versatile ion source to calibrate future space instrumentation at the University of Bern, Switzerland, this thesis presents planing, realization and characterization of a new high performance ion source. SWISSCASE, the Solar Wind Ion Source Simulator for the CAlibration of Space Experiments, is optimized for production of highly charged ions such as 2 A of Ar8+ and 80 pA of Ar12+. The ions are produced by an electron cyclotron resonance plasma which is heated by microwaves with a frequency of 10 GHz. The plasma is confined by a very compact full permanent magnet hexapole which makes the ion source highly attractive for the operation on a high voltage terminal due to its intrinsically low power consumption.
