Patent US4166218A successfully refreshed from Google Patents.
US4166218A
Expired / Lapsed
US
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P-i-n diode detector of ionizing radiation with electric field straightening
Assignee: Forschungszentrum Jülich
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Filing: 1977-10-26
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Granted: 1979-08-28
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Expires: 1997-10-26
Abstract
Abstract The distortion of the electric field in a p-i-n diode detector produced bylectrically active layer build-up on the exposed surface of the i zone is removed by irradiating the exposed i zone surface with a light source having the intensity of a few milliwatts.
Inventors
- 👤 Davor Protic
- 👤 Georg Riepe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:27
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/24; H; H10; H10F; H10F30/00; H10F30/20; H10F30/29; H10F30/292
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
169 words
Apparatus for detecting or measuring ionizing radiation comprising: a semi-conductor diode having an intrinsically conducting zone between a p-type conduction layer and an n-type conduction layer and provided with connections for applying an electrical field in the blocking direction of the diode; a casing surrounding said diode of material opaque to light and effective to provide electrical shielding, said casing having a window transparent for the ionizing radiation for irradiating therewith said intrinsic zone of said diode between said p-type and n-type layers so as to produce electron-hole pairs therein and to generate electrical pulses as the result of said electrical field; means for counting said pulses connected to said diode, and means (7) for irradiating said intrinsic conduction zone (i) with electro-magnetic radiation of such energy and intensity as to increase to a maximum the response probability of said diode (1) for an ionizing radiation consisting of gamma rays and/or for increasing to a maximum the resolving capability of said diode for ionizing radiation consisting of charged particles.
Claim 2
Dependent Claim
169 words
Apparatus for detecting or measuring ionizing radiation comprising: a semi-conductor diode having an intrinsically conducting zone between a p-type conduction layer and an n-type conduction layer and provided with connections for applying an electrical field in the blocking direction of the diode; a casing surrounding said diode of material opaque to light and effective to provide electrical shielding, said casing having a window transparent for the ionizing radiation for irradiating therewith said intrinsic zone of said diode between said p-type and n-type layers so as to produce electron-hole pairs therein and to generate electrical pulses as the result of said electrical field; means for counting said pulses connected to said diode, and means (7) for irradiating said intrinsic conduction zone (i) with electro-magnetic radiation of such energy and intensity as to increase to a maximum the response probability of said diode (1) for an ionizing radiation consisting of gamma rays and/or for increasing to a maximum the resolving capability of said diode for ionizing radiation consisting of charged particles.
Claim 3
Dependent Claim
38 words
Detecting or measuring apparatus as defined in claim 1 in which said means (7) for irradiating said intrinsic conduction zone (i) with electro-magnetic radiation consists of a source of visible light of a power of a few milliwatts.
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) | 1982-08-27 | 1983-02-26 | 1983-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-27 | 1987-02-26 | 1987-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-27 | 1991-02-26 | 1991-08-28 | $7700.00 | Window Closed / Lapsed |