NDLI: Multibeam cathode for electron devices

Content Provider	IEEE Xplore Digital Library
Author	Djubua, B.C. Polivnikova, O.V.
Copyright Year	2004
Description	Author affiliation: SRPC Istok, Moscow, Russia (Djubua, B.C.; Polivnikova, O.V.)
Abstract	The principal problem which arises at construction of multibeam cathodes units is provision of small spread in emission parameters of separate emitters in the unit preserving the mechanical strength and the shape stability of the cathode unit. The problem is reduced to the task of effective attachment of emitters to their seats in the cartridge-holder of the unit. There exist some structures of multibeam cathode units in which the emitters are fixed in the cartridge-holder by means of rolling or welding. A disadvantage of such units is their insufficient mechanical strength and a large scatter of temperature between separate emitters particularly under thermomechanical loads. As a rule, the emitters are made of tungsten sponge impregnated with barium-calcium aluminate. A cure for these difficulties is soldering. In this connection, the emitters are inserted into the holes in the cartridge-holder and in this case, there is a clearance of a definite width are made between the emitter and the walls of the hole, while the solder is located both inside the clearance and on the side of the emitter, opposite to the emitting surface, the emitter being immersed in the hole of the cartridge-holder down to some definite depth.
Starting Page	135
Ending Page	137
File Size	143383
Page Count	3
File Format	PDF
ISBN	0780384377
DOI	10.1109/IVESC.2004.1414164
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-06
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Shape Stability Welding Thermomechanical processes Scattering Tungsten Electron devices Soldering Cathodes
Content Type	Text
Resource Type	Article

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