GB1373402A - Method and apparatus for producing a controlled - Google Patents
Method and apparatus for producing a controlledInfo
- Publication number
- GB1373402A GB1373402A GB4017171A GB4017171A GB1373402A GB 1373402 A GB1373402 A GB 1373402A GB 4017171 A GB4017171 A GB 4017171A GB 4017171 A GB4017171 A GB 4017171A GB 1373402 A GB1373402 A GB 1373402A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electron
- electrons
- diaphragm
- gas
- cavity
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
- H02K44/08—Magnetohydrodynamic [MHD] generators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J17/00—Gas-filled discharge tubes with solid cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S3/00—Lasers, i.e. devices using stimulated emission of electromagnetic radiation in the infrared, visible or ultraviolet wave range
- H01S3/09—Processes or apparatus for excitation, e.g. pumping
- H01S3/097—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser
- H01S3/09707—Processes or apparatus for excitation, e.g. pumping by gas discharge of a gas laser using an electron or ion beam
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/006—Tubes with electron bombarded gas (e.g. with plasma filter)
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S422/00—Chemical apparatus and process disinfecting, deodorizing, preserving, or sterilizing
- Y10S422/906—Plasma or ion generation means
Abstract
1373402 Electron guns; lasers AVCO CORP 16 Sept 1971 [17 Sept 1970] 40171/71 Headings H1D and H1C A method of producing a spatially uniform controlled discharge (e.g. for lasers, MHD generators or accelerators, or ozone production) comprises (a) providing a gaseous working medium at such a pressure in a working region in a cavity having imperforate walls, as defined, that upon production of secondary electrons in the medium, the ambipolar and thermal diffusion rates are incapable of damping local increases in secondary electron density, (b) generating ionizing radiation (e.g. electrons, X-rays, u.v., a particles, light &c.) externally of the cavity, (c) and introducing that radiation into the cavity through one wall to produce a substantially spatially uniform density of secondary electrons by ionization, the one wall being impervious to gases, as defined, and pervious to the ionizing radiation and (d) providing a sustainer field for providing substantially uniformly a predetermined electron temperature effective to increase the average energy of the secondary electrons without increasing the predetermined electron density by self regenerative ionization, the electron temperature being such that the controlled discharge is produced substantially uniformly throughout the working region at a predetermined level, and effecting population inversion in the laser embodiment. "Imperforate walls" or "walls impervious to gases" includes an arrangement wherein a wall has one or more holes for admitting electrons but where gas diffusion is minimized. The external ionization extends over the cross-section of the working region and may include a scanned narrow electron beam as well as a broad area beam. Fig. 1, and Figs. 2, 3 (not shown) indicate a laser source and Fig. 4 (not shown) the enlarged electron source from which electrons are injected into the gas medium. In Fig. 1, gas flows through cavity 10 between electrodes 50, 52 and electron temperature control may be achieved by varying the voltage of the injected electrons from gun 25, which may also be formed by plasma or field emission, photoemission, u.v., electron or ion bombardment or photo-electric emission. Arcuate members 16, 17 provide smooth laminar flow and also included are mirror assemblies 21, 22, anode 52 (e.g. Au), stainless steel gun enclosure 26, spaced thermionic filaments 27 supported by electrically conductive stand-offs 29 in insulator plate 28 (also Fig. 4, not shown), supports and pulse circuit connectors 33, 34, reticulated screen 35, higher potential stainless plate 45, conductive or insulative diaphragm 47 (Al, Be, Ti or C) permitting pressure differentials and cooled by gas flow or conduction and insulated wire mesh cathode 50 preventing spurious arc damage to diaphragm 47. The beam may be defocused to cover a broad area or may be a beam rapidly scanned and may be from a plurality of electron beam welding type guns. The sustainer field may be D.C., r.f., and electrodes capacitative or inductive. Pressures of less than 1 Á and up to 1 atmos. or more are mentioned and an N 2 , CO 2 , He mix (3 : 2 : 1) or combinations of CO, H 2 O, SO 2 , HCN, NO, O 2 , H 2 , Ar, NO 2 , N 2 O, HF. Diaphragm 47 may be replaced by small holes in a plurality of plates defining differentially pumped chambers, plate voltages ensuring optimum focusing. Laser gas flow may be up to Mach 1. Beam uniformity may be tested by a fluorescent sodium salicylate coated plastic wall. Mirror details are given, and a 10À6 Á filter and Ge infra-red detector included. The electron beam pulse length may be varied to create a CW or pulsed laser. For ozone production, the working medium may be air of pure oxygen in apparatus as in Figs. 1 to 3, but without mirrors. MHD generation using the gas is also discussed, with a beam of electrons injected at a suitable angle to the B field direction. The apparatus may constitute the means for increasing or providing the required electrical conductivity. A jet of He may cool the diaphragm or foil. Discharge mechanisms are discussed in detail and many quantitative parameters disclosed.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7298270A | 1970-09-17 | 1970-09-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1373402A true GB1373402A (en) | 1974-11-13 |
Family
ID=22110985
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4017171A Expired GB1373402A (en) | 1970-09-17 | 1971-09-16 | Method and apparatus for producing a controlled |
Country Status (10)
Country | Link |
---|---|
US (1) | US3702973A (en) |
JP (1) | JPS555717B1 (en) |
CA (1) | CA939796A (en) |
CH (1) | CH575668A5 (en) |
DE (1) | DE2145963A1 (en) |
FR (1) | FR2106572B1 (en) |
GB (1) | GB1373402A (en) |
IL (1) | IL37615A (en) |
IT (1) | IT944700B (en) |
SE (1) | SE376817B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2451290A (en) * | 2007-07-26 | 2009-01-28 | David Andrew Johnston | Magnetohydrodynamic generator with photo-ionisation |
CN103128445A (en) * | 2011-11-30 | 2013-06-05 | 航天科工惯性技术有限公司 | Technique method for electrical connection of accelerometer torquer |
US8926789B2 (en) | 2005-09-27 | 2015-01-06 | Lam Research Corporation | Apparatus for the removal of a fluorinated polymer from a substrate |
Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3941670A (en) * | 1970-11-12 | 1976-03-02 | Massachusetts Institute Of Technology | Method of altering biological and chemical activity of molecular species |
US4596017A (en) * | 1971-07-13 | 1986-06-17 | The United States Of America As Represented By The United States Department Of Energy | Electron beam method and apparatus for obtaining uniform discharges in electrically pumped gas lasers |
BE788632A (en) * | 1971-09-17 | 1973-03-12 | D Comp Gen | |
US3789319A (en) * | 1972-05-08 | 1974-01-29 | Atomic Energy Commission | Hydrogen rotation-vibration oscillator |
US3789321A (en) * | 1972-09-14 | 1974-01-29 | Atomic Energy Commission | Electron beam-pumped gas laser system |
US3883413A (en) * | 1972-09-25 | 1975-05-13 | Avco Corp | Ozone generator using pulsed electron beam and decaying electric field |
US3781712A (en) * | 1972-10-17 | 1973-12-25 | Hughes Aircraft Co | Gas laser with discharge conditioning using ultraviolet photons generated in high current density preliminary discharge |
US3860887A (en) * | 1972-10-20 | 1975-01-14 | Avco Corp | Electrically excited high power flowing gas devices such as lasers and the like |
US3808551A (en) * | 1972-11-02 | 1974-04-30 | Avco Corp | Secondary foil for apparatus producing a controlled discharge which provides molecular excitation of a gaseous working medium |
US3810043A (en) * | 1972-11-15 | 1974-05-07 | Avco Corp | Method of operating closed-cycle carbon dioxide lasers in which carbon monoxide is used to prevent degradation of performance |
US3808553A (en) * | 1972-11-21 | 1974-04-30 | Avco Corp | Thermally stable laser resonator support assembly |
US3883819A (en) * | 1972-12-14 | 1975-05-13 | Us Energy | Apparatus for uniform pumping of lasing media |
GB1426161A (en) * | 1973-03-09 | 1976-02-25 | Avco Everett Res Lab Inc | Flowing-gas laser apparatus |
US3863163A (en) * | 1973-04-20 | 1975-01-28 | Sherman R Farrell | Broad beam electron gun |
US4085386A (en) * | 1973-05-30 | 1978-04-18 | Westinghouse Electric Corporation | Independent initiation technique of glow discharge production in high-pressure gas laser cavities |
US3982200A (en) * | 1973-09-04 | 1976-09-21 | Avco Everett Research Laboratory, Inc. | Electron beam gas discharge laser pressure control |
US3963994A (en) * | 1975-01-15 | 1976-06-15 | The United States Of America As Represented By The United States Energy Research And Development Administration | Slit injection device |
US4275318A (en) * | 1975-12-16 | 1981-06-23 | Duncan Fred A | Magnetohydrodynamic method and apparatus for converting solar radiation to electrical energy |
US4008444A (en) * | 1976-01-19 | 1977-02-15 | Avco Everett Research Laboratory, Inc. | Feedback control of a laser output |
US4010427A (en) * | 1976-03-08 | 1977-03-01 | Avco Everett Research Laboratory, Inc. | Laser output control system |
US4350915A (en) * | 1976-09-27 | 1982-09-21 | Wyatt William G | Radiant energy converter |
US4167466A (en) * | 1976-12-27 | 1979-09-11 | Accelerators, Inc. | Ozone generation apparatus and method |
US4095115A (en) * | 1976-12-27 | 1978-06-13 | Accelerators, Inc. | Ozone generation apparatus and method |
US4091306A (en) * | 1977-02-07 | 1978-05-23 | Northrop Corporation | Area electron gun employing focused circular beams |
US4134034A (en) * | 1977-03-09 | 1979-01-09 | Banyaszati Kutato Intezet | Magnetohydrodynamic power systems |
US4211983A (en) * | 1978-05-01 | 1980-07-08 | Avco Everett Research Laboratory, Inc. | High energy electron beam driven laser |
US4283686A (en) * | 1979-03-21 | 1981-08-11 | Avco Everett Research Laboratory, Inc. | Laser operation with closed gas and tuned duct pulsing |
US4278950A (en) * | 1979-06-06 | 1981-07-14 | The United States Of America As Represented By The Secretary Of The Air Force | Electro-dynamic laser with acoustic absorbing electrode |
US4320359A (en) * | 1979-06-26 | 1982-03-16 | The United States Of America As Represented By The Secretary Of The Air Force | Optical beam mode controlled laser system |
US4328443A (en) * | 1980-03-11 | 1982-05-04 | Avco Everett Research Laboratory, Inc. | Apparatus for providing improved characteristics of a broad area electron beam |
US4321558A (en) * | 1980-03-11 | 1982-03-23 | Avco Everett Research Laboratory, Inc. | Recirculating gas laser |
US4331937A (en) * | 1980-03-20 | 1982-05-25 | United Technologies Corporation | Stability enhanced halide lasers |
US4387344A (en) * | 1981-01-16 | 1983-06-07 | The United States Of America As Represented By The Secretary Of The Air Force | Photon storage tube high power laser system |
CA1148600A (en) * | 1981-09-23 | 1983-06-21 | James C. Hayes | Self induced laser magnetohydrodynamic (mhd) electric generator |
US4414670A (en) * | 1981-09-29 | 1983-11-08 | The United States Of America As Represented By The Secretary Of The Air Force | E-Beam maintained plasma discharge elecrodes |
JPS58155643A (en) * | 1982-03-10 | 1983-09-16 | Toshiba Corp | Glow-like discharge generator |
US4456811A (en) * | 1982-06-21 | 1984-06-26 | Avco Everett Research Laboratory, Inc. | Method of and apparatus for heat treating axisymmetric surfaces with an annular laser beam |
US4486887A (en) * | 1982-08-23 | 1984-12-04 | Metalworking Lasers International Ltd. | High-power lasers |
US4709373A (en) * | 1985-11-08 | 1987-11-24 | Summit Technology, Inc. | Laser excitation system |
US4719641A (en) * | 1985-11-08 | 1988-01-12 | Summit Technology, Inc. | Multiple chamber laser containment system |
US5798261A (en) * | 1989-10-31 | 1998-08-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Distributed pore chemistry in porous organic polymers |
US5141806A (en) * | 1989-10-31 | 1992-08-25 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Microporous structure with layered interstitial surface treatment, and method and apparatus for preparation thereof |
US5304352A (en) * | 1992-01-13 | 1994-04-19 | Bellettini Arturo G | Atmospheric ultra-violet laser ozonogenesis |
US5391962A (en) * | 1992-07-13 | 1995-02-21 | The United States Of America As Represented By The Secretary Of The Army | Electron beam driven negative ion source |
US5612588A (en) * | 1993-05-26 | 1997-03-18 | American International Technologies, Inc. | Electron beam device with single crystal window and expansion-matched anode |
US6080362A (en) * | 1995-06-07 | 2000-06-27 | Maxwell Technologies Systems Division, Inc. | Porous solid remediation utilizing pulsed alternating current |
US5756054A (en) * | 1995-06-07 | 1998-05-26 | Primex Technologies Inc. | Ozone generator with enhanced output |
WO1998037012A1 (en) * | 1997-02-20 | 1998-08-27 | Manning Thomas J | Apparatus and method for generating ozone |
US6027616A (en) * | 1998-05-01 | 2000-02-22 | Mse Technology Applications, Inc. | Extraction of contaminants from a gas |
US6452338B1 (en) | 1999-12-13 | 2002-09-17 | Semequip, Inc. | Electron beam ion source with integral low-temperature vaporizer |
EP1255694A4 (en) * | 1999-12-24 | 2008-06-25 | Sharper Image Corp | Method and apparatus to reduce ozone production in ion wind devices |
CA2415137A1 (en) * | 2000-07-05 | 2002-01-10 | Crt Holdings, Inc. | An electromagnetic radiation-initiated plasma reactor |
DE10209642A1 (en) * | 2002-03-05 | 2003-09-18 | Philips Intellectual Property | light source |
US20050105580A1 (en) * | 2003-11-13 | 2005-05-19 | Giapis Konstantinos P. | Apparatus for and method of series operation of DC microdischarge stages in a tube geometry for microlaser applications |
WO2010075254A2 (en) * | 2008-12-22 | 2010-07-01 | Ams Research Corporation | Laser resonator |
KR101870467B1 (en) * | 2010-10-29 | 2018-06-22 | 트럼프 인크. | Rfexcited laser assembly |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2030492A (en) * | 1931-12-14 | 1936-02-11 | Applebaum David | Glow tube control system |
US2429217A (en) * | 1942-05-07 | 1947-10-21 | Electronized Chem Corp | Device for treatment of matters with high-speed electrons |
US2333842A (en) * | 1942-07-09 | 1943-11-09 | Henry A De Phillips | Device for irradiating substances |
US2373661A (en) * | 1944-01-15 | 1945-04-17 | Phillips Henry Alfred De | Electron discharge vessel |
US2686275A (en) * | 1951-03-31 | 1954-08-10 | Rca Corp | Art of storing or delaying the transmission of electrical signals |
US3202934A (en) * | 1961-12-29 | 1965-08-24 | Thomas A Coffee | Cathode-ray excited laser generator |
US3403353A (en) * | 1965-04-08 | 1968-09-24 | Bell Telephone Labor Inc | Gas laser having a second cathode for space charge neutralization |
US3576583A (en) * | 1966-11-02 | 1971-04-27 | Matsushita Electric Ind Co Ltd | Direct record image discharge tube |
US3577096A (en) * | 1967-11-01 | 1971-05-04 | Hughes Aircraft Co | Transverse discharge gas laser |
US3555451A (en) * | 1968-03-28 | 1971-01-12 | Trw Inc | Laser cold cathode apparatus |
US3641454A (en) * | 1970-05-25 | 1972-02-08 | Atomic Energy Commission | Electron beam-pumped gas laser system |
-
1970
- 1970-09-17 US US72982A patent/US3702973A/en not_active Expired - Lifetime
-
1971
- 1971-08-25 CA CA121,347A patent/CA939796A/en not_active Expired
- 1971-08-30 IL IL37615A patent/IL37615A/en unknown
- 1971-08-31 SE SE7110993A patent/SE376817B/xx unknown
- 1971-09-09 FR FR7132566A patent/FR2106572B1/fr not_active Expired
- 1971-09-10 IT IT52816/71A patent/IT944700B/en active
- 1971-09-13 CH CH1338471A patent/CH575668A5/xx not_active IP Right Cessation
- 1971-09-14 DE DE19712145963 patent/DE2145963A1/en not_active Withdrawn
- 1971-09-14 JP JP7094871A patent/JPS555717B1/ja active Pending
- 1971-09-16 GB GB4017171A patent/GB1373402A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8926789B2 (en) | 2005-09-27 | 2015-01-06 | Lam Research Corporation | Apparatus for the removal of a fluorinated polymer from a substrate |
GB2451290A (en) * | 2007-07-26 | 2009-01-28 | David Andrew Johnston | Magnetohydrodynamic generator with photo-ionisation |
CN103128445A (en) * | 2011-11-30 | 2013-06-05 | 航天科工惯性技术有限公司 | Technique method for electrical connection of accelerometer torquer |
Also Published As
Publication number | Publication date |
---|---|
CA939796A (en) | 1974-01-08 |
SE376817B (en) | 1975-06-09 |
FR2106572A1 (en) | 1972-05-05 |
IL37615A0 (en) | 1972-01-27 |
IT944700B (en) | 1973-04-20 |
IL37615A (en) | 1974-03-14 |
CH575668A5 (en) | 1976-05-14 |
JPS555717B1 (en) | 1980-02-08 |
FR2106572B1 (en) | 1977-08-05 |
DE2145963A1 (en) | 1972-03-23 |
US3702973A (en) | 1972-11-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |