JPS5457860A - Electric field radiation type electron gun - Google Patents
Electric field radiation type electron gunInfo
- Publication number
- JPS5457860A JPS5457860A JP12347177A JP12347177A JPS5457860A JP S5457860 A JPS5457860 A JP S5457860A JP 12347177 A JP12347177 A JP 12347177A JP 12347177 A JP12347177 A JP 12347177A JP S5457860 A JPS5457860 A JP S5457860A
- Authority
- JP
- Japan
- Prior art keywords
- anode
- lens
- field
- electron gun
- electron
- 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.)
- Granted
Links
Abstract
PURPOSE: To realize the minimun diameter of an electron beam in the region which has a large current and a low acceleration voltage by provideing the anode of a field radiation type electron gun into the pole hole of a magnetic electron lens.
CONSTITUTION: The 1st anode 2 and 2nd anode 3 are electrically insulated each other and assembled on the same axis to form a Butler-type electrostatic lens. To the outside of the 2nd anode, magnetic field electron lens 4 is provided coaxially through the wall of vacuum container 5 in the center middle between the upper and lower poles of magnetic field electron lens 4, the 2nd anode 3 is positioned; and then, the field is overlaid on the electrostatic field of a Butler-type lens
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12347177A JPS6057181B2 (en) | 1977-10-17 | 1977-10-17 | field emission electron gun |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12347177A JPS6057181B2 (en) | 1977-10-17 | 1977-10-17 | field emission electron gun |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5457860A true JPS5457860A (en) | 1979-05-10 |
JPS6057181B2 JPS6057181B2 (en) | 1985-12-13 |
Family
ID=14861439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12347177A Expired JPS6057181B2 (en) | 1977-10-17 | 1977-10-17 | field emission electron gun |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6057181B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0214212Y2 (en) * | 1985-08-16 | 1990-04-18 | ||
JPS6240878U (en) * | 1985-08-29 | 1987-03-11 |
-
1977
- 1977-10-17 JP JP12347177A patent/JPS6057181B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS6057181B2 (en) | 1985-12-13 |
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