Please wait, while we are loading the content...
| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Shcherbinin, V.I. Zaginaylov, G.I. |
| Copyright Year | 2010 |
| Description | Author affiliation: National Scientific Center “Kharkov Institute of Physics and Technology”, 1, Akademicheskaya St., Kharkiv, 61108, Ukraine (Shcherbinin, V.I.; Zaginaylov, G.I.) |
| Abstract | Nowadays coaxial cavity gyrotrons are very promising sources of millimeter wave radiation which can be successfully used in thermonuclear fusion and some other applications. Development of industrial prototype of coaxial cavity gyrotron is in progress. One of the main obstacles in the enhancement of gyrotron performances is mode competition, which appears due to high density of mode spectrum in MW-class gyrotrons. Usually before reaching the operational point with maximal efficiency in the desired mode the accelerating voltage increases in time from zero value (start-up scenario). During start-up different cavity modes can be excited. In the last experiments the operational TE mode was excited stably over a wide range of the accelerating voltage (67 – 90kV) and has achieved the maximal output power of 1.8 MW near the upper boundary of the excitation region (∼90kV) [1]. At the higher voltage the efficiency of excitation for the operational mode sharply dropped and the multi-wave generation regime was sustained. However, in numerical simulations performed by our code [2] and the code SELFT [3] the excitation region is notably wider (up to the accelerating voltage ∼ 97 kV according to our results). The predicted maximal output power can achieve ∼ 2.5 MW. The discrepancy between experimental measurements and simulation results were attributed to the mode competition, however including several of the most dangerous competing modes into simulation did not lead to the more consistent results. One of the possible mechanisms of the oscillation range decreasing for the operational gyrotron mode was proposed in [4]. According to [4] excitation of the radial satellites of the operational mode (TE, TE) can shift the upper boundary of oscillation region for the TE mode and thereby reduces its power. However simulations performed by our code did not confirmed the results obtained in [4]. Moreover, we can propose another mechanism of the reduced output power observed in the experiments. |
| Starting Page | 1 |
| Ending Page | 1 |
| File Size | 63196 |
| Page Count | 1 |
| File Format | |
| ISBN | 9781424479009 |
| e-ISBN | 9781424478996 |
| DOI | 10.1109/MSMW.2010.5546054 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-21 |
| Publisher Place | Ukraine |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Content Type | Text |
| Resource Type | Article |
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...
|