公开(公告)号：US3424909A

公开(公告)日：1969-01-28

申请号：US3424909D

申请日：1966-03-24

Applicant: CSF

Inventor： ROUGEOT HENRI

IPC: H01J43/24 ,  H01J39/12

CPC classification number: H01J43/24

公开(公告)号：US3592522A

公开(公告)日：1971-07-13

申请号：US83275069

申请日：1969-06-12

Applicant: THOMSON CSF

Inventor： ROUGEOT HENRI

IPC: H01J43/24 ,  H01J9/38

CPC classification number: H01J43/24

Abstract: The tube is cut along two of its generatrices 14 and 24, over the whole of its length, and the two halves 12 and 22 thus obtained receive a secondary electron emissive coating on their inner walls. The two halves are then replaced in their initial position relatively to one another.