Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Beyersdorf, P.T. Getty, W.D. |
| Copyright Year | 1995 |
| Description | Author affiliation: Center for Display Technol. & Manuf., Michigan Univ., Ann Arbor, MI, USA (Beyersdorf, P.T.; Getty, W.D.) |
| Abstract | The MAGIC code was used to analyze a two-dimensional model of a microwave surface-ECR plasma source to obtain microwave field and electron-trajectory information for design purposes. This source uses permanent magnets to generate a cyclotron-resonance surface across the aperture of a rectangular or circular waveguide. The permanent magnets are located in channels in an aluminum "grill," and are held in the channels by a ceramic waveguide/vacuum window. The grill and window act as obstacles in the waveguide. Electron-trajectory analysis is done to examine kinetic power deposition on the grill and nearby waveguide walls, and electron heating by the microwave fields in the static field generated by the permanent magnets. The field is modeled by equations that approximate the actual magnetic field. MAGIC was used to study the reflection from the grill and window, and to determine the effect of adding boron nitride inserts in the open slots of the grill to reduce the reflection coefficient. The width of the open spaces and the number of magnet rows were varied to find an optimum design. The waveguide was modeled as a parallel-plane waveguide with a 15-cm spacing. The TM/sub 1/ parallel-plane waveguide mode was launched at the input end. A tapered transition was also designed to transform from standard WR284 waveguide to the 15-cm/spl times/20 cm source waveguide. The resulting design minimized the generation of higher-order modes and reflection of the dominant mode. Reflection coefficients as low as 20% could be obtained with 47% of the waveguide aperture covered by the grill. Minimum reflection was obtained when the spaces between magnet rows were half-filled with boron nitride. A few electrons were used for single-particle trajectories, and superelectrons in a background of immobile ions were used to model an underdense plasma. The kinetic power delivered to the grill and walls was found to be relatively small. |
| File Size | 122180 |
| File Format | |
| ISBN | 0780326695 |
| ISSN | 07309244 |
| DOI | 10.1109/PLASMA.1995.531487 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1995-06-05 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Plasma sources Reflection Electromagnetic heating Permanent magnets Magnetic analysis Apertures Kinetic theory Electrons Boron Magnetostatics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|