JPS5458344A - Thermal electron radiation cathode - Google Patents

Thermal electron radiation cathode

Info

Publication number
JPS5458344A
JPS5458344A JP12444777A JP12444777A JPS5458344A JP S5458344 A JPS5458344 A JP S5458344A JP 12444777 A JP12444777 A JP 12444777A JP 12444777 A JP12444777 A JP 12444777A JP S5458344 A JPS5458344 A JP S5458344A
Authority
JP
Japan
Prior art keywords
thermal
cathode
cylinder
support
reflection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP12444777A
Other languages
Japanese (ja)
Inventor
Teiji Katsuta
Ushio Kawabe
Masaaki Futamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP12444777A priority Critical patent/JPS5458344A/en
Publication of JPS5458344A publication Critical patent/JPS5458344A/en
Pending legal-status Critical Current

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  • Solid Thermionic Cathode (AREA)

Abstract

PURPOSE: To increase the efficiency of thermal electron emission, by effectively shiedlding the heat radiated from the cathode, through the provision of the thermal reflection cylinder surrounding the cathode closely except for the direction of thermal electron emission.
CONSTITUTION: The conductive support 2 having the cathode 1 at the middle is fixed on a pair of support electrodes 3 fixed. Next, the thermal reflection cylinder 5 of cup shape having the notch left and right passing through the support 2 via slight clearance is fixed on the upper end of the support 6 standing straight at the center of the insulator 4. Further, the cylinder 5 and support 6 are made of the metal excellent in the thermal reflection such as stainless steel and tantulm. Thus, since the thermal rays from the cathode 1 is shielded with the cylinder 5 having good thermal reflection, the electrode 3 and Wenert cylinder can not thermally be distorted and the temperature of the cathode 1 can be increased, Thus, the efficiency of the thermal electron reflection can be increased
COPYRIGHT: (C)1979,JPO&Japio
JP12444777A 1977-10-19 1977-10-19 Thermal electron radiation cathode Pending JPS5458344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12444777A JPS5458344A (en) 1977-10-19 1977-10-19 Thermal electron radiation cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12444777A JPS5458344A (en) 1977-10-19 1977-10-19 Thermal electron radiation cathode

Publications (1)

Publication Number Publication Date
JPS5458344A true JPS5458344A (en) 1979-05-11

Family

ID=14885730

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12444777A Pending JPS5458344A (en) 1977-10-19 1977-10-19 Thermal electron radiation cathode

Country Status (1)

Country Link
JP (1) JPS5458344A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510884A (en) * 1983-04-18 1985-04-16 Itt Corporation Device for providing a dual coating on an optical fiber

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503568A (en) * 1973-04-09 1975-01-14
JPS503564A (en) * 1973-04-09 1975-01-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503568A (en) * 1973-04-09 1975-01-14
JPS503564A (en) * 1973-04-09 1975-01-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4510884A (en) * 1983-04-18 1985-04-16 Itt Corporation Device for providing a dual coating on an optical fiber

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