Design And Initial Comparative Evaluation Studies Of Conventional Surface And New Concept Volume Type All Permanent Magnet Electron Cyclotron Resonance Ecr Ion Sources PDF Download
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| Author | : Hassina Zai͏̈m -Bilheux |
| Publisher | : |
| Total Pages | : 240 |
| Release | : 2003 |
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Download Design and Initial Comparative Evaluation Studies of Conventional "surface" and New Concept "volume"-type, All Permanent Magnet Electron Cyclotron Resonance (ECR) Ion Sources Book in PDF, ePub and Kindle
ECR ion sources are clearly the best choice of existing sources for the generation of CW beams of highly charged ions, and therefore, they are at a premium for high-energy accelerator-based applications. The technology of the source has slowly but steadily advanced over the past several years (improvement in plasma confinement; use of very high frequency microwave radiation; improvement in vacuum quality; supplementing their plasma discharges with cold electrons; biased disks; and gas mixing effect). Recently, it has been suggested that their performances can be significantly further enhanced by incresing the physical sizes of their ECR zones in relation to the sizes of their plasma volumes (spatial and frequency domain methods). A 6 GHz, all-permanent magnet ECR ion source with à large resonant plasma volume has been designed, constructed and initially tested at the Oak Ridge National Laboratory. The conventional minimum-B("surface") resonance conditions so that direct comparaisons of the performances of the two source types can be made under identical operating conditions. According to initial test results, the flat-B source performs better than its conventionnal-B conterpart, in terms of charge-state distribution and intensity within a particular charge-state. This is attributable to the very large ECR zones present in the source and their locations with respect to the launch direction of the RF power.
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| Release | : 2004 |
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| ISBN | : 9787508030043 |
Download 上清天關三圖經 Book in PDF, ePub and Kindle
| Author | : |
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| Total Pages | : 17 |
| Release | : 1997 |
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Download Design Aspects of a Compact, Single-frequency, Permanent Magnet ECR Ion Source with a Large Uniformly Distributed Resonant Plasma Volume Book in PDF, ePub and Kindle
A compact, all-permanent-magnet single-frequency ECR ion source with a large uniformly distributed ECR plasma volume has been designed and is presently under construction at the Oak Ridge National Laboratory (ORNL). The central region of the field is designed to achieve a flat-field (constant mod-B) which extends over the length of the central field region along the axis of symmetry and radially outward to form a uniformly distributed ECR plasma volume. The magnetic field design strongly contrasts with those used in conventional ECR ion sources where the central field regions are approximately parabolic and the consequent ECR zones are surfaces. The plasma confinement magnetic field mirror has a mirror ratio B{sub max}/B{sub ECR} of slightly greater than two. The source is designed to operate at a nominal RF frequency of 6 GHz. The central flat magnetic field region can be easily adjusted by mechanical means to tune the source to the resonant conditions within the limits of 5.5 to 6.8 GHz. The RF injection system is broadband to ensure excitation of transverse electric (TE) modes so that the RF power is largely concentrated in the resonant plasma volume which lies along and surrounds the axis of symmetry of the source. Because of the much larger ECR zone, the probability for absorption of microwave power is dramatically increased thereby increasing the probability for acceleration of electrons, the electron temperature of the plasma and, consequently, the hot electron population within the plasma volume of the source. The creation of an ECR volume rather than a surface is commensurate with higher charge states and higher beam intensities within a particular charge state.
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| Total Pages | : 2240 |
| Release | : 1997 |
| Genre | : Electrical engineering |
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Download Electrical & Electronics Abstracts Book in PDF, ePub and Kindle
| Author | : R Geller |
| Publisher | : Routledge |
| Total Pages | : 351 |
| Release | : 2018-12-13 |
| Genre | : Science |
| ISBN | : 135145322X |
Download Electron Cyclotron Resonance Ion Sources and ECR Plasmas Book in PDF, ePub and Kindle
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
| Author | : Mark E. Artz |
| Publisher | : |
| Total Pages | : 82 |
| Release | : 2012 |
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Download Design and Testing of an Electron Cyclotron Resonance Heating Ion Source for Use in High Field Compact Superconducting Cyclotrons Book in PDF, ePub and Kindle
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.
| Author | : Dan M. Goebel |
| Publisher | : John Wiley & Sons |
| Total Pages | : 528 |
| Release | : 2008-12-22 |
| Genre | : Technology & Engineering |
| ISBN | : 0470436263 |
Download Fundamentals of Electric Propulsion Book in PDF, ePub and Kindle
Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.
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| Total Pages | : 1264 |
| Release | : 1994 |
| Genre | : Physics |
| ISBN | : |
Download Physics Briefs Book in PDF, ePub and Kindle
| Author | : |
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| Total Pages | : 3 |
| Release | : 1997 |
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Download Status Report of a Compact 10 GHz Electron Cyclotron Resonance (ECR) Ion Source for Atomic Physics Experiments Book in PDF, ePub and Kindle
A summary of recent modifications and developments of a compact, fully permanent magnet ECR ion source will be given in this paper. To improve the confinement of the plasma electrons the axial magnetic mirror ratio has been enhanced to 2.5. This results in a more efficient plasma heating at low microwave power levels and therefore ion currents up to 320 e[mu]A could be extracted with a microwave power of less than 10 Watts. The maximum intensities for different charge states and various gases obtained so far will be shown.
| Author | : Aseem Kumar Srivastava |
| Publisher | : |
| Total Pages | : 364 |
| Release | : 1995 |
| Genre | : Electron cyclotron resonance sources |
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Download Properties of Electron Cyclotron Resonance Plasma Sources Book in PDF, ePub and Kindle
