US4871915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detector for bremsstrahlung-isochromatic-spectroscopy (BIS)
Assignee: Forschungszentrum Jülich
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Filing: 1988-11-29
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Granted: 1989-10-03
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Expires: 2008-11-29
Abstract
Abstract A detector for bremsstrahlung-isochromatic-spectroscopy (BIS) utilizing a gas-filled metal cylinder forming an outer electrode and a wire extending axially in the cylinder has an inner electrode. The window for the UV photons is constituted of MgF2 while the counting gas is a mixture of dimethylether and an inert gas and in which the pressure of the dimethylether is 0.2 to 0.5 mbar.
Inventors
- 👤 Kevin C. Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
H; H01; H01J; H01J47/00; H01J47/001; H01J47/002; H01J47/004; H01J47/005
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
68 words
A detector for bremsstrahlung-isochromatic-spectroscopy (BIS) which comprises: a hollow metal cylinder forming an outer electrode of said detector; a wire extending axially through said cylinder and forming an inner electrode of said detector; means forming an MgF 2 window in said metal cylinder traversed by ultraviolet photons to be detected; and a gas mixture in said cylinder consisting of dimethylether CH 3 --O--CH 3 and an inert gas.
Claim 2
Dependent Claim
68 words
A detector for bremsstrahlung-isochromatic-spectroscopy (BIS) which comprises: a hollow metal cylinder forming an outer electrode of said detector; a wire extending axially through said cylinder and forming an inner electrode of said detector; means forming an MgF 2 window in said metal cylinder traversed by ultraviolet photons to be detected; and a gas mixture in said cylinder consisting of dimethylether CH 3 --O--CH 3 and an inert gas.
Claim 3
Dependent Claim
24 words
The detector for BIS defined in claim 1 wherein said dimethylether has a partial pressure in said cylinder of substantially 0.2 to 0.5 mbar.
Claim 4
Dependent Claim
23 words
The detector for BIS defined in claim 2 wherein said inert gas has a partial pressure in said cylinder of about 150 mbar.
Claim 5
Dependent Claim
23 words
The detector for BIS defined in claim 1 wherein said inert gas has a partial pressure in said cylinder of about 150 mbar.
Claim 6
Independent Claim
95 words
A method of detecting a band structure of a solid, comprising the steps of: (a) training electrons onto a solid having a lattice structure capable of emitting ultraviolet photons; (b) detecting the emitted ultraviolet photons by passing said photons through an MgF 2 window in a metal cylinder forming an outer electrode of a detector for bremsstrahlung-isochromatic-spectroscopy (BIS) which comprises a wire extending axially through said cylinder and forming an inner electrode of said detector; and (c) maintaining in said cylinder a gas mixture consisting of dimethylether CH 3 --O--CH 3 and an inert gas.
Claim 7
Independent Claim
95 words
A method of detecting a band structure of a solid, comprising the steps of: (a) training electrons onto a solid having a lattice structure capable of emitting ultraviolet photons; (b) detecting the emitted ultraviolet photons by passing said photons through an MgF 2 window in a metal cylinder forming an outer electrode of a detector for bremsstrahlung-isochromatic-spectroscopy (BIS) which comprises a wire extending axially through said cylinder and forming an inner electrode of said detector; and (c) maintaining in said cylinder a gas mixture consisting of dimethylether CH 3 --O--CH 3 and an inert gas.
Claim 8
Dependent Claim
22 words
The method defined in claim 5 wherein said dimethylether has a partial pressure in said cylinder of substantially 0.2 to 0.5 mbar.
Claim 9
Dependent Claim
21 words
The method defined in claim 6 wherein said inert gas has a partial pressure in said cylinder of about 150 mbar.
Claim 10
Dependent Claim
21 words
The method defined in claim 5 wherein said inert gas has a partial pressure in said cylinder of about 150 mbar.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-10-02 | 1993-04-03 | 1993-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-10-02 | 1997-04-03 | 1997-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-10-02 | 2001-04-03 | 2001-10-03 | $7700.00 | Window Closed / Lapsed |