NDLI: The tapered MILO

Content Provider	IEEE Xplore Digital Library
Author	Eastwood, J.W. Hawkins, K.C. Hook, M.P.
Copyright Year	1973
Abstract	New magnetically insulated line oscillator (MILO) designs using tapered slow-wave structures and axial power extraction are presented and analyzed. Simulations show them to substantially outperform previous MILO variants, predicting efficiencies up to 20%. Experiments are in good agreement with simulations. Two gain mechanisms are shown to contribute to this high efficiency. The first part of the paper shows how the new designs and their two amplification mechanisms overcome limitations of earlier designs. Linear dispersive properties are examined, and results from particle-in-cell (PIC) simulations are summarized. The tapered MILO gives amplification without the mode competition seen in earlier /spl pi//2-amplifier and double MILO designs. Simulation of tuning the tapered MILO shows a 30% frequency bandwidth to 3 dB of peak power. Tapered MILO simulations and experiments are shown to be in good agreement; both show that the output radio frequency (RF) power is a simple quadratic function of the supply voltage over the range of voltages accessible to the experiment. All of the major features of the results from the laboratory experiment are well described by the idealized electrodynamical model implemented in the simulation program, indicating that plasma formation problems are not important for the voltages used. Experiments both with velvet and with carbon-felt-coated cathodes give RF pulses whose duration is limited solely by the power supply; velvet agreed most closely with simulation, whereas carbon-felt cathodes showed slower RF growth but agreed well in steady state.
Sponsorship	IEEE Nuclear and Plasma Sciences Society
Starting Page	698
Ending Page	713
Page Count	16
File Size	366380
File Format	PDF
ISSN	00933813
Volume Number	26
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1998-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Radio frequency Voltage Plasma simulation Cathodes Pulsed power supplies Insulation Oscillators Magnetic analysis Predictive models Dispersion
Content Type	Text
Resource Type	Article
Subject	Nuclear and High Energy Physics Condensed Matter Physics

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

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