Cold cathode electron gun and vacuum gauge tube using the same |
Title: |
Cold cathode electron gun and vacuum gauge tube using the same |
|
Application Number: |
200410027020 |
Application Date: |
2004/04/21 |
Announcement Date: |
2005/11/02 |
Pub. Date: |
|
Publication Number: |
1691245 |
Announcement Number: |
|
Grant Date: |
|
Granted Pub. Date: |
|
ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H01J 3/02, H01J 41/00, G01L 21/34 |
Applicant(s): |
Tsinghua University |
Inventor(s): |
Fan Shoushan, Liu Liang, Liu Peng, Qi Jing, Sheng Leimei, Wei Yang |
Key Words: |
Cold cathode electron gun, vacuum gauge tube |
Abstract: |
A cold cathode electron gun for measuring of ultrahigh vacuum and extreme high vacuum, comprising a gate and a cathode set under the gate, is characterized that a shaded pole is paralleled above the gate. The invention also provides a vacuum gauge, comprising: a shell, a collector, an anode and a cold cathode electron gun; the cold cathode electron gun and the collector are coaxially symmetrical with the anode; the opening of the shell is connected with the measuring components, it is characterized in that the cold cathode electron gun comprises a gate, a shaded pole that parallels with the gate and a cathode set under the gate. |
Claim: |
|
Priority: |
|
PCT: |
|
LegalStatus: |
|