公开(公告)号：US3630770A

公开(公告)日：1971-12-28

申请号：US3630770D

申请日：1969-04-30

Applicant: GEN ELECTRIC

Inventor： FAVREAU LOUIS J

IPC: B05B7/22 ,  C23C4/10 ,  H01J9/04 ,  H05H1/42 ,  B44D1/18 ,  H01J1/14 ,  H01J19/06

CPC classification number: H05H1/42 ,  B05B7/226 ,  C23C4/10 ,  H01J9/04 ,  H01J9/042 ,  Y10T428/31678

Abstract: A method for fabricating cathodes with a lanthanum boride coating is disclosed in which the coating is applied to any base metal by spraying with a plasma flame spray. One plasma source is a spray gun utilizing an electric arc discharge through which a plasma gas is passed so that a plasma of ionized gas issues from the spray gun into which is injected a carrier gas having lanthanum boride powder suspended therein. The high-temperature plasma flame appearing at the nozzle of the spray gun melts the lanthanum boride (LaB6) almost instantly and the droplets formed thereby are carried to the surface of a prepared base material.

公开(公告)号：US3631291A

公开(公告)日：1971-12-28

申请号：US3631291D

申请日：1969-04-30

Applicant: GEN ELECTRIC

Inventor： FAVREAU LOUIS J

IPC: H01J1/304 ,  H01J1/14 ,  H01J19/06 ,  H01K1/04

CPC classification number: H01J1/304

Abstract: A field emission cathode comprises a hairpin rhenium filament coated with lanthanum boride and with a fine tungsten tip attached to the rhenium filament serves as an efficient source of electrons. The presence of free lanthanum atoms at the tungsten surface lowers the work function and enhances the field emission from the tungsten tip.

公开(公告)号：US3582710A

公开(公告)日：1971-06-01

申请号：US3582710D

申请日：1969-05-22

Applicant: GEN ELECTRIC

Inventor： FAVREAU LOUIS J

IPC: H01J41/04 ,  H01J7/16 ,  G01N27/62 ,  H01J17/22

CPC classification number: H01J41/04

Abstract: A magnetron ionization gauge having the capability of measuring ultrahigh vacuum of the order of 2 X 10 16 torr with high sensitivity and conversion constant is formed with a hollow cylindrical anode and an electron-containment ferromagnetic plate at either end of the anode. An ion-collector is centrally located within a cylindrical anode and extends the entire length thereof. An electron-emitting cathode is located off center between the ion-collector and the anode wall and parallel to the longitudinal axis. An ion-collector shield extends the entire length of the ion-collector and is interposed between the ion-collector and the electron-emitting filament. The device is biased well beyond cutoff to provide restricted curvilinear paths for ionizing the electrons circulating around inside the anode.