US4828817A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing an atomic oxygen beam
Assignee: National Aeronautics and Space Administration
•
Filing: 1987-10-29
•
Granted: 1989-05-09
•
Expires: 2007-10-29
Abstract
Abstract A method for producing an atomic oxygen beam is provided by the present invention. First, a material 10' is provided which dissociates molecular oxygen and dissolves atomic oxygen into its bulk. Next, molecular oxygen is exposed to entrance surface 11' of material 10'. Next, material 10' is heated by heater 17' to facilitate the permeation of atomic oxygen through material 10' to the UHV side 12'. UHV side 12' is interfaced with an ultra-high vacuum (UHV) environment provided by UHV pump 15'. The atomic oxygen on the UHV side 12' is excited to a non-binding state by exciter 14' thus producing the release of atomic oxygen to form an atomic oxygen beam 35'.
Inventors
- 👤 Ronald A. Outlaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:09
CPC Classifications
C; C01; C01B; C01B13/00; C01B13/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
102 words
A method of producing an atomic oxygen beam comprising: providing a material having two sides, which material dissociates molecular oxygen and dissolves atomic oxygen into its bulk: exposing one side of said material to molecular oxygen; providing an ultra high vacuum environment of a pressure of less than 1×10 -9 Torr on the other side of said material; heating said material to a sufficient temperature to promote atomic oxygen permeation to the other side of said material; exciting atomic oxygen to a non-binding state which results in its release from the other side of said material as an excited atomic oxygen beam.
Claim 2
Independent Claim
102 words
A method of producing an atomic oxygen beam comprising: providing a material having two sides, which material dissociates molecular oxygen and dissolves atomic oxygen into its bulk: exposing one side of said material to molecular oxygen; providing an ultra high vacuum environment of a pressure of less than 1×10 -9 Torr on the other side of said material; heating said material to a sufficient temperature to promote atomic oxygen permeation to the other side of said material; exciting atomic oxygen to a non-binding state which results in its release from the other side of said material as an excited atomic oxygen beam.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the excited atomic oxygen beam is exposed to a negatively charged means to remove positively charged atomic oxygen from the beam.
Claim 4
Dependent Claim
27 words
The method of claim 1 wherein the excited atomic oxygen beam is exposed to a positively charged means to remove negatively charged atomic oxygen from the beam.
Claim 5
Dependent Claim
21 words
The method of claim 1 wherein the said material is selected from the group consisting of silver, zirconium, titanium, and hafnium.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein the step of exciting the atomic oxygen to a non-binding state includes bombarding said material with electrons at the side of the ultra high vacuum environment.
Claim 7
Dependent Claim
32 words
The method of claim 1 wherein the step of exciting the atomic oxygen to a non-binding state includes bombarding said material with photons at the side of the ultra high vacuum environment.
Claim 8
Independent Claim
135 words
A method of producing an atomic oxygen beam comprising: providing a material which dissociates molecular oxygen and dissolves atomic oxygen into its bulk; placing said material in a chamber; heating said material to at least approximately 500° C.; exposing said material to molecular oxygen at a pressure between approximately 0.1 to 1000 Torr; heating said chamber to approximately 200° C. at a pressure of approximately 1×10 8 Torr while maintaining said material at a temperature of 20° C.; providing an ultra-high vacuum environment of less than 1×10 -9 Torr to said exposed material; heating said exposed material to a sufficient temperature to promote atomic oxygen diffusion to the surface of said material; exciting atomic oxygen to a nonbinding state which results in its release from the surface of said material as an atomic oxygen beam.
Claim 9
Independent Claim
135 words
A method of producing an atomic oxygen beam comprising: providing a material which dissociates molecular oxygen and dissolves atomic oxygen into its bulk; placing said material in a chamber; heating said material to at least approximately 500° C.; exposing said material to molecular oxygen at a pressure between approximately 0.1 to 1000 Torr; heating said chamber to approximately 200° C. at a pressure of approximately 1×10 8 Torr while maintaining said material at a temperature of 20° C.; providing an ultra-high vacuum environment of less than 1×10 -9 Torr to said exposed material; heating said exposed material to a sufficient temperature to promote atomic oxygen diffusion to the surface of said material; exciting atomic oxygen to a nonbinding state which results in its release from the surface of said material as an atomic oxygen beam.
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein the said material is selected from the group consisting of silver, zirconium, titanium, and hafnium.
Claim 11
Dependent Claim
32 words
The method of claim 7 wherein the step of exciting the atomic oxygen to a non-binding state includes bombarding said material with electrons at the side of the ultra high vacuum environment.
Claim 12
Dependent Claim
32 words
The method of claim 7 wherein the step of exciting the atomic oxygen to a non-binding state includes bombarding said material with photons at the side of the ultra high vacuum environment.
References Cited (Backward Citations)
US3143647A
Cited
US3341352A
Cited
US3359705A
Cited
US3969481A
Cited
US3876957A
Cited
US4261863A
Cited
US4542010A
Cited
US4585945A
Cited
US4488951A
Cited
US4599157A
Cited
US4602987A
Cited
US4686022A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |