The design and development of a noncompressing post-deflection acceleration method for cathode-ray tubes Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/7d278w77m

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  • A short history is given of cathode-ray tubes, from the earliest laboratory tubes available during the early 1900's through present day high performance tubes. Special attention is paid to the development of post-deflection acceleration types especially band-type PDA tubes and an improvement on that type known as the helix-type PDA tube. One of the most severe complications of the band or helix-type PDA tube has been scan compression. Analysis of this problem has led directly into the noncompressing method developed here. A model of this noncompressing method, i.e. the voltage and gradient between two spheres, is applied to a practical system. Some of the constraints of the practical system including the problem of two virtual sources for the beam, the design of the field-forming element and the limitations on the application of the required boundary conditions, have complicated the design somewhat. These constraints have not prevented the achievement of a close approximation to the voltage and gradient required from the analysis. Evaluation of this new noncompressing CRT (now called a mesh-type tube) shows it to be superior to the older types of PDA tubes in every respect except for minimum spot size. In addition to the mesh tube's low sensibility and high writing speed, the mesh tube is compact and adapts nicely to the small package size required for modern day equipment.
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  • File scanned at 300 ppi using Capture Perfect 3.0 on a Canon DR-9050C in PDF format. CVista PdfCompressor 5.0 was used for pdf compression and textual OCR.
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  • description.provenance : Approved for entry into archive by Katy Davis(kdscannerosu@gmail.com) on 2014-04-07T23:38:58Z (GMT) No. of bitstreams: 1 PerkinsPeterE1968.pdf: 382677 bytes, checksum: 5638731c1850bc15509afdc62ab456d6 (MD5)
  • description.provenance : Made available in DSpace on 2014-04-07T23:38:58Z (GMT). No. of bitstreams: 1 PerkinsPeterE1968.pdf: 382677 bytes, checksum: 5638731c1850bc15509afdc62ab456d6 (MD5) Previous issue date: 1967-06-09
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2014-04-01T14:07:45Z (GMT) No. of bitstreams: 1 PerkinsPeterE1968.pdf: 382677 bytes, checksum: 5638731c1850bc15509afdc62ab456d6 (MD5)
  • description.provenance : Submitted by Kevin Martin (martikev@onid.orst.edu) on 2014-03-28T17:45:05Z No. of bitstreams: 1 PerkinsPeterE1968.pdf: 382677 bytes, checksum: 5638731c1850bc15509afdc62ab456d6 (MD5)

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