A 250 Ghz Photonic Band Gap Gyrotron Amplifier

Download A 250 Ghz Photonic Band Gap Gyrotron Amplifier full books in PDF, epub, and Kindle. Read online A 250 Ghz Photonic Band Gap Gyrotron Amplifier ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!

A 250 GHz Photonic Band Gap Gyrotron Amplifier

Author : Emilio Alessandro Nanni
Publisher :
ISBN 13 :
Total Pages : 206 pages
Book Rating : 4.:/5 (862 download)

DOWNLOAD NOW!

Book Synopsis A 250 GHz Photonic Band Gap Gyrotron Amplifier by : Emilio Alessandro Nanni

Download or read book A 250 GHz Photonic Band Gap Gyrotron Amplifier written by Emilio Alessandro Nanni and published by . This book was released on 2013 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports the theoretical and experimental investigation of a novel gyrotron traveling-wave-tube (TWT) amplifier at 250 GHz. The gyrotron amplifier designed and tested in this thesis has achieved a peak small signal gain of 38 dB at 247.7 GHz, with a 32 kV, 0.35 A electron beam and a 8.9 T magnetic field. The instantaneous -3 dB bandwidth of the amplifier at peak gain is 0.4 GHz. A peak output power of 45 W has been measured. The output power is not saturated but is limited by the 7.5 mW of available input power. The amplifier can be tuned for operation from 245- 256 GHz. With a gain of 24 dB and centered at 253.25 GHz the widest instantaneous -3 dB bandwidth of 4.5 GHz was observed for a 19 kV, 0.305 A electron beam. To achieve stable operation at these high frequencies, the amplifier uses a novel photonic band gap (PBG) interaction circuit. The PBG interaction circuit confines the TE03-like mode which couples strongly to the electron beam. The PBG circuit provides stability from oscillations by supporting the propagation of TE modes in a narrow range of frequencies, allowing for the confinement of the operating TE03-like mode while rejecting the excitation of oscillations at lower frequencies. Experimental results taken over a wide range of parameters, 15-30 kV and 0.25-0.5 A, show good agreement with a theoretical model. The theoretical model incorporates cold test measurements for the transmission line, input coupler, PBG waveguide and mode converter. This experiment achieved the highest frequency of operation (250 GHz) for a gyrotron amplifier. At present, there are no other amplifiers in this frequency range that are capable of producing either high gain or high-output power. With 38 dB of gain and 45 W this is also the highest gain observed above 94 GHz and the highest output power achieved above 140 GHz by any conventional-voltage vacuum electron device based amplifier. The output power, output beam pattern, instantaneous bandwidth, spectral purity and shot-to-shot stability of the amplified pulse meet the basic requirements for the implementation of this device on a pulsed dynamic nuclear polarization (DNP) nuclear magnetic resonance (NMR) spectrometer.

Design of a 250 GHz Gyrotron Amplifier

Author : Emilio Alessandro Nanni
Publisher :
ISBN 13 :
Total Pages : 109 pages
Book Rating : 4.:/5 (711 download)

DOWNLOAD NOW!

Book Synopsis Design of a 250 GHz Gyrotron Amplifier by : Emilio Alessandro Nanni

Download or read book Design of a 250 GHz Gyrotron Amplifier written by Emilio Alessandro Nanni and published by . This book was released on 2010 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: A design is presented of a 250 GHz, 1 kW gyrotron traveling wave tube (gyro-TWT) amplifier with gain exceeding 50 dB. Calculations show that the amplifier will operate at 32 kV, 1 A with a saturated gain of 60 dB, an output power of 1 kW and a gain bandwidth of 3 GHz. The amplifier uses a novel photonic band gap (PBG) interaction circuit for stable single mode operation in an overmoded circuit. The design mode is a TE03-like mode confined by the PBG lattice with no nearby competing modes. The design of the input coupler, interaction circuit, output coupler and electron gun have also been completed. The amplifier design accounts for requirements imposed by the device's intended application of pulsed nuclear magnetic resonance spectroscopy with pulses as short as several hundred picoseconds. This design will be implemented at a later date for the construction of the highest frequency, kW power level amplifier based on vacuum electronics. To gain understanding of short pulse amplification in vacuum electron devices, an experimental study of sub-nanosecond pulse amplification in a gyro-TWT has been carried out on an existing experimental setup at 140 GHz. The gyro-TWT operates with 30 dB of small signal gain in the HE06 mode of a confocal waveguide. Picosecond pulses show broadening and transit time delay due to two distinct effects: the frequency dependence of the group velocity near cutoff and gain narrowing by the finite gain bandwidth of 1.2 GHz. Experimental results taken over a wide range of parameters, with pulses as short as 400 ps, show good agreement with a theoretical model in the small signal gain regime.

New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs

Author : Marek, Alexander
Publisher : KIT Scientific Publishing
ISBN 13 : 3731512505
Total Pages : 322 pages
Book Rating : 4.7/5 (315 download)

DOWNLOAD NOW!

Book Synopsis New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs by : Marek, Alexander

Download or read book New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs written by Marek, Alexander and published by KIT Scientific Publishing. This book was released on 2023-01-26 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work presents the development of a new sub-THz source for the generation of trains of coherent high-power ultra-short pulses at 263 GHz via passive mode-locking of two coupled helical gyro-TWTs. For the first time, it is shown that the operation of such passive mode-locked helical gyro-TWTs in the hard excitation regime is of particular importance to reach the optimal coherency of the generated pulses. This could be of particular interest for some new time-domain DNP-NMR methods.

Handbook of High Field Dynamic Nuclear Polarization

Author : Vladimir K. Michaelis
Publisher : John Wiley & Sons
ISBN 13 : 1119441668
Total Pages : 920 pages
Book Rating : 4.1/5 (194 download)

DOWNLOAD NOW!

Book Synopsis Handbook of High Field Dynamic Nuclear Polarization by : Vladimir K. Michaelis

Download or read book Handbook of High Field Dynamic Nuclear Polarization written by Vladimir K. Michaelis and published by John Wiley & Sons. This book was released on 2020-01-03 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt: Addresses Dynamic Nuclear Polarization (DNP) as a technique for sensitivity-enhancement in solid-state NMR spectroscopy This comprehensive handbook is a compendium of the current state-of-the art of high field Dynamic Nuclear Polarization—from long-proven, early developments, up to today’s hot topics. It covers all the relevant subjects that have made a direct or indirect contribution toward advancing this field, and focuses on topics such as: the theory behind the effects seen within DNP; instrumentation required for carrying out DNP; and specific applications of DNP including protein monitoring, catalysis, nanoparticles, biological and clinical studies. Development and application of techniques that have indirectly contributed to advancing MAS DNP NMR, such as DNP experiments on static solids within microwave resonant structures, and high-field EPR, are also examined. Handbook of High Field Dynamic Nuclear Polarization is presented in three sections—Theoretical Aspects, DNP Development (instrumentation / radical / sample), and DNP NMR Applications. The first section offers chapters on; solid and cross effect DNP; thermal mixing; Overhauser; and dissolution DNP. The second looks at: microwave technology, gyrotron, and IOE; homebuilt and commercial DNP spectrometers; and glassing vs. solvent-free DNP. The final section provides information on; amyloid, membrane, and nanocrystalline proteins; metals, and surface enhanced DNP; pharmaceuticals; nanoparticles; and much more. Covers one of the biggest developing fields in magnetic resonance Relevant to students, academics, and industry within the physical, materials, medical, and biochemical sciences An excellent starting point and point-of-reference for researchers in the field Edited by a widely respected team with contributions from key researchers in the NMR community Part of the eMagRes Handbook Series Handbook of High Field Dynamic Nuclear Polarization is an ideal reference for all researchers and graduate students involved in this complex, interdisciplinary field. About eMagRes Handbooks eMagRes publishes a wide range of online articles on all aspects of magnetic resonance in physics, chemistry, biology and medicine. The existence of this large number of articles, written by experts in various fields, is enabling the publication of a series of eMagRes Handbooks on specific areas of NMR and MRI. The chapters of each of these handbooks will comprise a carefully chosen selection of eMagRes articles. In consultation with the eMagRes Editorial Board, the eMagRes Handbooks are coherently planned in advance by specially-selected Editors, and new articles are written to give appropriate complete coverage. The handbooks are intended to be of value and interest to research students, postdoctoral fellows and other researchers learning about the scientific area in question and undertaking relevant experiments, whether in academia or industry. Have the content of this Handbook and the complete content of eMagRes at your fingertips! Visit: www.wileyonlinelibrary.com/ref/eMagRes

Millimeter-Wave Gyrotron Traveling-Wave Tube Amplifiers

Author : Chao-Hai Du
Publisher : Springer
ISBN 13 : 3642547281
Total Pages : 200 pages
Book Rating : 4.6/5 (425 download)

DOWNLOAD NOW!

Book Synopsis Millimeter-Wave Gyrotron Traveling-Wave Tube Amplifiers by : Chao-Hai Du

Download or read book Millimeter-Wave Gyrotron Traveling-Wave Tube Amplifiers written by Chao-Hai Du and published by Springer. This book was released on 2014-05-29 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: A gyrotron traveling-wave amplifier (gyro-TWT) with the high-power and broad-band capabilities is considered as a turn-on key for next generation high-resolution radar. The book presents the most advanced theory, methods and physics in a gyro-TWT. The most challenging problem of instability competition has been for the first time addressed in a focused and systematic way and reported via concise states and vivid pictures. The book is likely to meet the interest of researchers and engineers in radar and microwave technology, who would like to study the gyro-TWTs and to promote its application in millimeter-wave radars. Chao-Hai Du and Pu-Kun Liu are both professors at Peking University.

A Photonic Band Gap Resonator Gyrotron

Author : Jagadishwar Rao Sirigiri
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (65 download)

DOWNLOAD NOW!

Book Synopsis A Photonic Band Gap Resonator Gyrotron by : Jagadishwar Rao Sirigiri

Download or read book A Photonic Band Gap Resonator Gyrotron written by Jagadishwar Rao Sirigiri and published by . This book was released on 2001 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report the design and experimental demonstration of a gyrotron oscillator using a photonic band gap (PBG) structure to eliminate mode competition in a highly overmoded resonator. The PBG cavity supports a TE041 -like mode at 140 GHz and is designed to have no competing modes over a minimum frequency range (delta omega/ omega) of 30 % about the design mode. Experimental operation of a 68 kV, 5 A gyrotron oscillator with the PBG resonator demonstrated 25 kW of peak output power in microsecond pulsed operation in the design mode. No other modes were observed over the full predicted operating range about the design mode. PBG cavities show great promise for applications in vacuum electron devices in the millimeter and submillimeter-wave bands.

Introduction to the Physics of Gyrotrons

Author : Gregory S. Nusinovich
Publisher : JHU Press
ISBN 13 : 1421429411
Total Pages : 352 pages
Book Rating : 4.4/5 (214 download)

DOWNLOAD NOW!

Book Synopsis Introduction to the Physics of Gyrotrons by : Gregory S. Nusinovich

Download or read book Introduction to the Physics of Gyrotrons written by Gregory S. Nusinovich and published by JHU Press. This book was released on 2020-03-03 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: As unique sources of coherent high-power, microwave, and millimeter-wave radiation, gyrotrons are an essential part of the hunt for controlled fusion. Presently, gyrotrons are actively used for electron cyclotron resonance plasma heating and current drive in various controlled fusion reactors. These sources have been under development in many countries for more than forty years. In spite of their widespread use, however, there is as yet no single book to introduce non-specialists to this vital field. Now Gregory S. Nusinovich, an early pioneer of the gyrotron and widely regarded today as the world's leading authority on the subject, explains the fundamental physical principles upon which gyrotrons and related devices operate. Nusinovich first sets forth some "rules of thumb" that allow readers to understand gyrotron operation in simple terms. He then explores the fundamentals of the general theory of gyrotrons and offers an overview of the various types of gyro-devices, including gyromonotrons, gyroklystrons, gyro-traveling-wave tubes, and gyrotwystrons. He explains not only the theory, linear and nonlinear, but also the practical challenges that users of such devices face. This book will be of interest to undergraduate and graduate students as well as to those who develop gyrotrons or who use them in various applications. It should also appeal to plasma physicists interested in charged-particle dynamics, as well as to applied physicists needing to know more about micro- and millimeter-wave technologies.

Index to IEEE Publications

Author : Institute of Electrical and Electronics Engineers
Publisher :
ISBN 13 :
Total Pages : 1168 pages
Book Rating : 4.F/5 ( download)

DOWNLOAD NOW!

Book Synopsis Index to IEEE Publications by : Institute of Electrical and Electronics Engineers

Download or read book Index to IEEE Publications written by Institute of Electrical and Electronics Engineers and published by . This book was released on 1994 with total page 1168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Roadmap on Photonic Crystals

Author : Susumu Noda
Publisher : Springer Science & Business Media
ISBN 13 : 1475737165
Total Pages : 259 pages
Book Rating : 4.4/5 (757 download)

DOWNLOAD NOW!

Book Synopsis Roadmap on Photonic Crystals by : Susumu Noda

Download or read book Roadmap on Photonic Crystals written by Susumu Noda and published by Springer Science & Business Media. This book was released on 2013-03-14 with total page 259 pages. Available in PDF, EPUB and Kindle. Book excerpt: Photonic Crystals are the newest types of optical material being developed for commercial applications in industry. They are likely to provide an exciting new tool for the manipulations of photons and have received the attention of both academia and industry. Roadmap on Photonic Crystals gives a detailed explanation of the background of photonic crystals, the theories behind them, numerical simulations, crystal structures, fabrication processes, evaluation methods and proposed applications. This also includes a roadmap addressing future development and applications. Industrial scientists, post-doctoral researchers and graduate students will find Roadmap on Photonic Crystals a useful tool in the understanding of the critical aspects of photonic crystals.

AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications

Author : Jutta Kühn
Publisher : KIT Scientific Publishing
ISBN 13 : 3866446152
Total Pages : 264 pages
Book Rating : 4.8/5 (664 download)

DOWNLOAD NOW!

Book Synopsis AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications by : Jutta Kühn

Download or read book AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications written by Jutta Kühn and published by KIT Scientific Publishing. This book was released on 2011 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has arisen out of the strong demand for a superior power-added efficiency (PAE) of AlGaN/GaN high electron mobility transistor (HEMT) high-power amplifiers (HPAs) that are part of any advanced wireless multifunctional RF-system with limited prime energy. Different concepts and approaches on device and design level for PAE improvements are analyzed, e.g. structural and layout changes of the GaN transistor and advanced circuit design techniques for PAE improvements of GaN HEMT HPAs.

Introduction to Terahertz Electronics

Author : Jae-Sung Rieh
Publisher : Springer Nature
ISBN 13 : 3030518426
Total Pages : 363 pages
Book Rating : 4.0/5 (35 download)

DOWNLOAD NOW!

Book Synopsis Introduction to Terahertz Electronics by : Jae-Sung Rieh

Download or read book Introduction to Terahertz Electronics written by Jae-Sung Rieh and published by Springer Nature. This book was released on 2020-10-01 with total page 363 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a practical guide to terahertz electronics, especially for readers with an electronics background. The author guides readers through the all the key concepts of terahertz electronics, including terahertz sources, detectors, and waveguides, together with reviews on key terahertz applications on spectroscopy, imaging, communication, and radar. This book will serve as a handy reference for graduate students and engineers in the field of terahertz with a viewpoint from electronics. Presents the topic of terahertz from electronics viewpoint; Designed to be particularly helpful for the readers familiar with semiconductor devices and circuits; Enables optics-based terahertz researchers to understand terahertz electronics; Based on the author’s extensive experience from both industry and academia.

High Power Microwaves

Author : James Benford
Publisher : CRC Press
ISBN 13 : 1420012061
Total Pages : 552 pages
Book Rating : 4.4/5 (2 download)

DOWNLOAD NOW!

Book Synopsis High Power Microwaves by : James Benford

Download or read book High Power Microwaves written by James Benford and published by CRC Press. This book was released on 2007-02-05 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first edition of High Power Microwaves was considered to be the defining book for this field. Not merely updated but completely revised and rewritten, the second edition continues this tradition. Written from a systems perspective, the book provides a unified, coherent presentation of the fundamentals in this rapidly changing field. The p

Dissertation Abstracts International

Author :
Publisher :
ISBN 13 :
Total Pages : 884 pages
Book Rating : 4.F/5 ( download)

DOWNLOAD NOW!

Book Synopsis Dissertation Abstracts International by :

Download or read book Dissertation Abstracts International written by and published by . This book was released on 2006 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Energy Research Abstracts

Author :
Publisher :
ISBN 13 :
Total Pages : 484 pages
Book Rating : 4.0/5 ( download)

DOWNLOAD NOW!

Book Synopsis Energy Research Abstracts by :

Download or read book Energy Research Abstracts written by and published by . This book was released on 1994-02 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Magnetic Fusion Technology

Author : Thomas J. Dolan
Publisher : Springer Science & Business Media
ISBN 13 : 1447155564
Total Pages : 816 pages
Book Rating : 4.4/5 (471 download)

DOWNLOAD NOW!

Book Synopsis Magnetic Fusion Technology by : Thomas J. Dolan

Download or read book Magnetic Fusion Technology written by Thomas J. Dolan and published by Springer Science & Business Media. This book was released on 2014-02-10 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt: Magnetic Fusion Technology describes the technologies that are required for successful development of nuclear fusion power plants using strong magnetic fields. These technologies include: • magnet systems, • plasma heating systems, • control systems, • energy conversion systems, • advanced materials development, • vacuum systems, • cryogenic systems, • plasma diagnostics, • safety systems, and • power plant design studies. Magnetic Fusion Technology will be useful to students and to specialists working in energy research.

Microwave Discharges

Author : Carlos M. Ferreira
Publisher : Springer Science & Business Media
ISBN 13 : 1489911308
Total Pages : 556 pages
Book Rating : 4.4/5 (899 download)

DOWNLOAD NOW!

Book Synopsis Microwave Discharges by : Carlos M. Ferreira

Download or read book Microwave Discharges written by Carlos M. Ferreira and published by Springer Science & Business Media. This book was released on 2013-11-21 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a NATO ARW held in Vimeiro, Portugal, May 11-15, 1992

Handbook of Terahertz Technologies

Author : Ho-Jin Song
Publisher : CRC Press
ISBN 13 : 9814613096
Total Pages : 606 pages
Book Rating : 4.8/5 (146 download)

DOWNLOAD NOW!

Book Synopsis Handbook of Terahertz Technologies by : Ho-Jin Song

Download or read book Handbook of Terahertz Technologies written by Ho-Jin Song and published by CRC Press. This book was released on 2015-04-15 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: Terahertz waves, which lie in the frequency range of 0.1-10 THz, have long been investigated in a few limited fields, such as astronomy, because of a lack of devices for their generation and detection. Several technical breakthroughs made over the last couple of decades now allow us to radiate and detect terahertz waves more easily, which has trigg