Title:
ELECTRON SOURCE AND X-RAY TUBE EQUIPPED THEREWITH
Document Type and Number:
WIPO Patent Application WO/2016/027575
Kind Code:
A1
Abstract:
This electron source (3) is characterized by: the division of a focusing electrode (33), which is disposed in the perimeter of a thermion source (31), into an equipotential line forming portion (33a) for forming equipotential lines in the perimeter of the thermion source, and a support portion (33b) for supporting the equipotential line forming portion; the formation of the equipotential line forming portion from a material having a higher voltage withstanding ability than the support portion; and the formation of the support portion from a material having a lower coefficient of thermal expansion than the equipotential line forming portion. In this way, even when the thermion source is heated and an increase in the temperature of a member occurs, maintaining the positional accuracy of the member and preventing a discharge are possible.
Inventors:
IZUMI TAKURO (JP)
Application Number:
PCT/JP2015/069341
Publication Date:
February 25, 2016
Filing Date:
July 03, 2015
Export Citation:
Assignee:
SHIMADZU CORP (JP)
International Classes:
H01J35/14; H01J35/06
Foreign References:
| JPS55144637A | 1980-11-11 | |||
| JP2012018790A | 2012-01-26 | |||
| JP2001167688A | 2001-06-22 | |||
| JPS63190235A | 1988-08-05 | |||
| JPH06290721A | 1994-10-18 | |||
| JPS53137660A | 1978-12-01 | |||
| JPS567339A | 1981-01-26 |
Attorney, Agent or Firm:
SUGITANI Tsutomu (JP)
Tsutomu Sugitani (JP)
Tsutomu Sugitani (JP)
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