Title:
半透明光電陰極を有する真空光電素子の光電陰極アセンブリ
Document Type and Number:
Japanese Patent JP6918936
Kind Code:
B2
Abstract:
The invention relates to photocathode assemblies of vacuum photoelectronic devices operating in the ultraviolet spectrum region and comprising a photocathode based on gallium nitride compounds, and can be used in the design of proximity-focused direct view electron-optical converters, photomultiplier tubes and microchannel intensified position-sensitive detectors, manufactured by means of the separate processing of photocathode and housing parts. In a photocathode assembly of a vacuum photoelectronic device with a semi-transparent photocathode, layers of a heteroepitaxial structure of gallium nitride compounds are grown as the semi-transparent photocathode on the inner surface of the input window made in the form of a sapphire disk. An element made of bimetal for coupling the input window with a housing of the vacuum photoelectronic device is vacuum-tightly attached to the outer surface of the input window at the periphery thereof. A layer of the bimetal being not in contact with the outer surface of the input window consists of a material having a linear thermal expansion coefficient different from the linear thermal expansion coefficient of sapphire by not more than 10% in the temperature range from 20°C to 200°C. The invention expands the application area of the photocathode assembly of a vacuum photoelectronic device with a semi-transparent photocathode, increases the quantum yield of the semi-transparent photocathode of a photocathode assembly of a vacuum photoelectronic device, allows meeting the requirement for uniform resolving power over the operational field of the screen of a vacuum photoelectronic device in the case of using the photocathode assembly within a proximity-focused direct view electron-optical converter.
Inventors:
Iosif Isakovich Goldberg
Alexander Vladimirovich Dorgiff
Vladimir Irich Loctionov
Alexander Vladimirovich Dorgiff
Vladimir Irich Loctionov
Application Number:
JP2019524113A
Publication Date:
August 11, 2021
Filing Date:
June 14, 2017
Export Citation:
Assignee:
Akzionernoye Opsischesbo Kattod
International Classes:
H01J29/38; H01J40/06
Domestic Patent References:
| JP64086432A |
Other References:
RU 2524753 C1
Attorney, Agent or Firm:
Hayashi Ichiyoshi
Tetsuo Shiba
Takuya Saito
Iwaike Mitsuru
Kazuhiro Kosuga
Yasuhiko Murayama
Shinya Mitsuhiro
Tatsuhiko Abe
Tetsuo Shiba
Takuya Saito
Iwaike Mitsuru
Kazuhiro Kosuga
Yasuhiko Murayama
Shinya Mitsuhiro
Tatsuhiko Abe