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8148680 |
Ion transfer arrangement with spatially alternating DC and viscous ion flow
A method of transporting gas and entrained ions between higher and lower pressure regions of a mass spectrometer comprises providing an ion transfer conduit 60 between the higher and lower pressure...
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8148679 |
Efficient atmospheric pressure interface for mass spectrometers and method
An ion transfer arrangement for transporting ions between higher and lower pressure regions of the mass spectrometer comprises an ion transfer conduit 60. The conduit 60 has an inlet opening...
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7982183 |
Ion transfer tube with spatially alternating DC fields
An ion transfer arrangement for transporting ions between higher and lower pressure regions of a mass spectrometer includes an electrode assembly (120) with a first plurality of ring electrodes...
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7635943 |
Image display device having an ion pump with reduced leakage
An image display apparatus is provided with a vacuum chamber consisting of an electron source substrate and an image display substrate, and an ion pump which is attached to an electron-emitting...
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7615765 |
Charged particle beam apparatus
There is provided a compact charged particle beam apparatus with a non-evaporable getter pump which maintains high vacuum even during emission of an electron beam without generating foreign...
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7242135 |
High voltage connection for vacuum electron device
A high voltage direct current contact for a vacuum electron device (VED), including (a) an outer cathode line having a first hollow cylinder having a first VED connection end, (b) a contact block...
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6616417 |
Spatter ion pump
The sputter ion pump includes a vacuum chamber that includes an inner wall having a cylindrical section which is rugged in cross section. The rugged cylindrical section has outer recesses each of...
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5980212 |
Anode-cathode structure for ion pump having specifically determined dimensions
A sputter ion pump in which the ratio of the length L to the diameter D of each anode cell forming a multi-cell anode inserted between two cathodes is defined within a certain range, thereby...
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5655886 |
Vacuum maintenance device for high vacuum chambers
An ion pump permits the continuous evacuation of a small-envelope vacuum chamber while drawing a relatively small amount of power (micro watts). In a preferred embodiment, the present ion pump, due...
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5563407 |
X-ray image intensifier tube with an ion pump to maintain a high vacuum in the tube
An X-ray image intensifier incorporates a pair of opposed electrodes and an ion pump within a vacuum vessel. The ion pump supplies a magnetic field to a space between the opposed electrodes. At...
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5548183 |
Magnetic field immersion type electron gun
In a magnetic field immersion type electron gun for controlling an electron beam emitted by an electron gun (51) with the use of an electric lens (56) and a magnetic field lens formed by permanent...
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5150001 |
Field emission electron gun and method having complementary passive and active vacuum pumping
An electron beam system comprises a vacuum enclosure, a source of electrons within the enclosure, and a passive pump located within or in communication with the enclosure for pumping gases from the...
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5111054 |
Heat-actuated vacuum valve for a particle beam apparatus
A heat-actuated valve is inserted between a first vacuum space and a further vacuum space in a particle beam apparatus. The valve is preferably activatable by the temperature required for...
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5036290 |
Synchrotron radiation generation apparatus
Synchrotron radiation is generated when a base of charged particles is bent by a bending magnet. The synchrotron radiation passes down a lead-out duct as the total number of pumps is limited by the...
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5021702 |
Electron beam apparatus including a plurality of ion pump blocks
An electron beam apparatus has a cylindrical chamber, ion pump exhaust zones arranged in a substantially ring-like array, and an electron gun located on the center axis of the ring-like array,...
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4853640 |
Synchrotron radiation source
An industrial compact synchrotron radiation source which can improve vacuum evacuation performance to prolong life-time of a charged particle beam and supply highly intensive stable synchrotron...
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4833362 |
Encapsulated high brightness electron beam source and system
An encapsulated high brightness source for use in or with an electron beam system such as an electron beam microscope. The source preferably includes a field emitter. The source includes source...
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4785254 |
Pulsed particle beam vacuum-to-air interface
A vacuum-to-air interface (10) is provided for a high-powered, pulsed particle beam accelerator. The interface comprises a pneumatic high speed gate valve (18), from which extends a vacuum-tight...
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4636680 |
Vacuum gauge
An ionization gauge of the type including a source of electrons, an accelerating electrode for accelerating said electrons through a volume generally defined by said accelerating electrode and a...
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4389165 |
Ion pump for producing an ultrahigh degree of vacuum
An ion pump for producing an ultrahigh degree of vacuum comprising a space formed between a first perforated flat plate-shaped electrode and a second flat plate-shaped electrode and having a high...
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4302679 |
Method of determining the x-ray limit of an ion gauge
An ion gauge having a reduced "x-ray limit" and means for measuring that limit. The gauge comprises an ion gauge of the Bayard-Alpert type having a short collector and having means for varying the...
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4295072 |
Field emission electron gun with anode heater and plural exhausts
In a field emission electron gun including heating means for heating an anode to prevent gas emission from the anode due to bombardment thereof by the electron beam emitted from the cathode, the...
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4121128 |
Collective ion accelerator with foil-less beam extraction window
Ions are generated in a vacuum condition of an ion accelerator and injected hrough three aerodynamic windows to atmosphere pressure. In its travel through the windows the coil provides a magnetic...
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4071799 |
Sodium vapor lamp with emission aperture
A low pressure sodium vapor lamp including a sodium vapor discharge tube and a light reflector partially surrounding the discharge tube and defining a light transmission aperture for desired...
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3891882 |
Ionization gauge
Presented is a vacuum pressure ionization gauge of the thermionic type which operates in the medium to high pressure range of the vacuum spectrum. It utilizes the principal of gas ionization by...
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3839655 |
BAYARD-ALPERT VACUUM IONIZATION TUBE
An improved Bayard-Alpert type vacuum ionization tube includes an electron collecting grid surrounding and coaxial with a centrally located positive ion collector. The grid has an inner diameter of...
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3809957 |
METHOD FOR PRESERVING ELECTRON GUN ASSEMBLIES
A method for preserving electron gun assemblies is disclosed. In the method, an electron gun assembly, including a thermionic cathode emitter, is assembled in a vacuum envelope structure. The...
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3801850 |
GETTER-CONTAINING ELECTRIC DISCHARGE DEVICES
An open-ended non-vaporizable getter element is secured to an anode axial bore of a disk-seal electric discharge tube with a sleeve-like tubing seal. The getter element comprises an open-ended...
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3761159 |
OPTICAL MEMORY FOR COHERENT OPTICAL SYSTEMS
An optical memory for coherent optical systems comprises a storage medium having transmission properties which may be changed locally by scanning with an electron beam. The storage medium is, for...
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3760212 |
IONIZATION PRESSURE GAUGE TUBE
An ionization pressure gauge tube is designed as a triode including an electron-emitting hot cathode, an electron-accelerating electrode and an ion collector arranged between the cathode and the...
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3743876 |
HOT-CATHODE IONIZATION GAUGE HAVING ELECTRODE MEANS FOR SHAPING THE ELECTRIC FIELD IN THE VICINITY OF THE CATHODE
A hot-cathode ionization gauge of the Bayard Alpert type having a central ion collector, a cylindrical grid surrounding the ion collector, a cathode for producing electrons positioned outside the...
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3728570 |
ELECTRON PROBE FORMING SYSTEM
An electron gun comprising an electron source and an anode which together can produce a beam of electrons and which are both disposed substantially within a lens which serves to help focus the...
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3694691 |
SUBLIMATION GETTER PUMP WITH CATHODE TRIGGER MEANS
Sublimation getter pump includes, in one embodiment, a cathode electrode made of an active gas gettering material, an anode electrode closely juxtaposed to the cathode electrode and defining...
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3668453 |
ELECTRICAL SWITCH DEVICE HAVING A FED LIQUID-METAL CATHODE AND A NON-INTERCEPTING ANODE
The electrical switch device has an envelope in which is mounted a liquid-metal cathode, an anode, and a condenser. The cathode is capable of very high electron-to-atom emission ratio. A desirable...
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3631280 |
IONIC VACUUM PUMP INCORPORATING AN ION TRAP
An ionic vacuum pump, which is continuously operated to maintain a vacuum within an image tube, is located at the end of a cylindrical tubulation connected to the envelope of the tube. An ion trap...
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3622741 |
ELECTRON-BEAM-PROCESSING MACHINE HAVING MEANS FOR DEFLECTING IMPURITIES FROM THE PATH OF THE ELECTRON BEAM
Apparatus in electron-beam-processing machines for keeping the path of the working beam free of impurities, the apparatus having a screening device associated with the working beam for catching...
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3614510 |
NONTHERMIONIC CATHODE DISCHARGE DEVICES
A nonthermionic cathode glow discharge device comprising an enclosure and means to maintain gas in the enclosure at a predetermined pressure. An anode is mounted in the enclosure or forms a part of...
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3603704 |
RADIANT HEAT REFLECTION IN DEVICES SUCH AS GETTER PUMPS
A heat reflector having a number of discrete spaced surfaces which present a substantially continual heat-reflecting surface wherein adjacent surfaces are offset with respect to each other...
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3596123 |
ANODE STRUCTURE FOR A MAGNETICALLY CONFINED GLOW DISCHARGE GETTER ION PUMP
A magnetically confined glow discharge getter ion pump is disclosed. The pump includes a pump housing containing an anode electrode having a glow discharge passageway therethrough and with a pair...
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3591827 |
ION-PUMPED MASS SPECTROMETER LEAK DETECTOR APPARATUS AND METHOD AND ION PUMP THEREFOR
A mass spectrometer is connected to a vacuum system which includes a vacuum-pumping system and which is communicated with the vessel under test exposed to a suitable probe gas. The vacuum-pumping...
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3586904 |
OFF-SWITCHING OF LIQUID-METAL ARC SWITCHING DEVICE BY AUXILIARY ARC LIQUID-METAL STARVATION
An enclosed vessel containing one or more main anodes, one or more auxiliary anodes, a cathode, and means for maintaining a low pressure in the tube comprises a liquid-metal arc switching device....
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3583829 |
GETTER-ION PUMP FOR PRODUCING AND MAINTAINING A HIGH VACUUM
A getter-ion pump for producing and sustaining a high vacuum in a vessel includes a pump housing in communication with the vessel. The pump housing includes spaced anode and cathode electrodes...
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3582710 |
ULTRAHIGH VACUUM MAGNETRON IONIZATION GAUGE WITH FERROMAGNETIC ELECTRODES
A magnetron ionization gauge having the capability of measuring ultrahigh vacuum of the order of 2 × 10-16 torr with high sensitivity and conversion constant is formed with a hollow cylindrical ...
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3576465 |
IONIZATION GAUGE CONTROL WITH EMISSION RESPONSIVE CONTROL OF THERMIONIC FILAMENT HEATING
Ionization guage control for thermionic emission vacuum devices such as ionization gauges used in measurement of gas density and the like. The control comprises an overpressure control operative...
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3573523 |
VACUUM GAUGE ARRANGEMENT PROVIDED WITH A FLANGE CONNECTION
A heat protective electrode positioned between a hot cathode ion source having an ionization chamber and an associated electrode system having an ion collector. The heat protective electrode is...
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3573460 |
ION CHAMBER DETECTOR FOR SUBMICRON PARTICLES
This invention relates to gas analyzing apparatus and more particularly to an improved ion chamber apparatus for detecting the presence of submicron size particles entrained in a gaseous carrier.
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3555331 |
APPARATUS FOR MAINTAINING VACUUM CONDITIONS BY MOLECULAR DEPLETION OF GAS
Incursion of ambient gas into a vacuum-operating device such as an election beam apparatus is protected against by sequentially expanding and adsorbing gas moving toward the device in a series of...
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3546510 |
SQUARE CATHODE FOR ION GETTER PUMPS
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3540812 |
SPUTTER ION PUMP
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3529208 |
DISCHARGE LAMP ARRANGEMENT FOR LIGHTING PURPOSES
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