Low dose rate high output electron beam tube
Abstract
Abstract ELECTRONS HAVING ENERGY OF THE ORDER OF HUNDREDS OF KILOVOLTS ARE PRODUCED OVER A WIDE AREA BY A VACUUM TIGHT TUBE CONTAINING GAS AT LOW PRESSURE WHICH BECOMES IONIZED. ELECTRONS ARE RELEASED AT THE CATHODE SURFACE IN HOLLOW DEPRESSIONS IN THAT SURFACE EXTENDING OVER A LARGE AREA BY SECONDARY EMISSION CAUSED BY BOMBARDMENT OF THE CATHODE SURFACE WITH POSITIVE IONS AND BY COLLISION IONIZATION PROCESSES IN THE GAS. THE ELECTRONS THUS RELEASED ARE ACCELERATED AND FOCUSED INTO APERTURES IN THE ANODE WHICH ARE COVERED WITH THIN ELECTRON WINDOWS THROUGH WHICH THE ELECTRONS ISSUE AS UNIFORM AND PARALLEL STREAMS SUITABLE FOR THE SIMULTANEOUS IRRADIATION OF COATINGS AND LIKE MATERIALS OVER A LARGE AREA.
Inventors
- 👤 John G Trump
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-27 | 1974-12-27 | 1975-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-27 | 1978-12-27 | 1979-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-27 | 1982-12-27 | 1983-06-28 | $7700.00 | Window Closed / Lapsed |