Patent US1160104A successfully refreshed from Google Patents.
Patent US2263807A successfully refreshed from Google Patents.
Patent US4993033A successfully refreshed from Google Patents.
US4993033A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High power fast switch
Assignee: Thermo Fisher Scientific Inc
•
Filing: 1989-12-18
•
Granted: 1991-02-12
•
Expires: 2009-12-18
Abstract
Abstract A high power fast switch for generating pulses of current to a load from a high voltage power source. A laser beam illuminates a cathode which simulates the emission of pulses of electrons which illuminate a diamond target. The pulses of electrons cause the diamond target to become conductive permitting high power pulses of electric current to pass through the diamond target from a high voltage source to a load. In a preferred embodiment a Klystron buncher compresses the electron pulses onto the diamond target.
Inventors
- 👤 Shiow-Hwa Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:05
CPC Classifications
H; H01; H01J; H01J21/00; H01J21/02; H01J25/00; H01J25/02; H03; H03K; H03K17/00; H03K17/51; H03K17/78; H03K3/00; H03K3/02; H03K3/53
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
203 words
A high power fast switch for generating pulses of current, said pulses being triggered by laser pulses comprising: (a) a photoemission cathode having an electron emitting surface and a connection means for connecting said emitting surface to a high voltage biasing source, (b) a diamond target positioned so as to be illuminated by electrons emitted from said emitting surface when said emitting surface is illuminated by said laser pulses, (c) a first conductor means attached to said diamond target for connection to a high voltage power source, and (d) a second conductor means, attached to said diamond target but not in contact with said first conductor, for connecting said diamond target to a load, (e) said cathode, said connection means, said target and said first and second conductor means being arranged so that then when said connection means is connected to said high voltage biasing source, said first conductor means is connected to said high voltage power source, second conductor means is connected to said load, and a pulse of said laser pulses illuminates said cathode, said high power fast switch closes permitting a high voltage, high current pulse of electric current to flow from said high voltage power source to said load.
Claim 2
Dependent Claim
203 words
A high power fast switch for generating pulses of current, said pulses being triggered by laser pulses comprising: (a) a photoemission cathode having an electron emitting surface and a connection means for connecting said emitting surface to a high voltage biasing source, (b) a diamond target positioned so as to be illuminated by electrons emitted from said emitting surface when said emitting surface is illuminated by said laser pulses, (c) a first conductor means attached to said diamond target for connection to a high voltage power source, and (d) a second conductor means, attached to said diamond target but not in contact with said first conductor, for connecting said diamond target to a load, (e) said cathode, said connection means, said target and said first and second conductor means being arranged so that then when said connection means is connected to said high voltage biasing source, said first conductor means is connected to said high voltage power source, second conductor means is connected to said load, and a pulse of said laser pulses illuminates said cathode, said high power fast switch closes permitting a high voltage, high current pulse of electric current to flow from said high voltage power source to said load.
Claim 3
Dependent Claim
25 words
A switch as in claim 1 and further comprising a compressing means for compressing pulses of electrons emitted from said cathode onto said diamond target.
Claim 4
Dependent Claim
14 words
A switch as in claim 1 wherein said compressing means is a Klystron buncher.
Claim 5
Dependent Claim
14 words
A switch as in claim 1 wherein said diamond target is a diamond chip.
Claim 6
Dependent Claim
15 words
A switch as in claim 1 wherein said diamond chip is smaller than 0.1 carat.
Claim 7
Dependent Claim
14 words
A switch as in claim 1 wherein said diamond target is a diamond film.
Claim 8
Dependent Claim
16 words
A switch as in claim 1 wherein said laser means is a frequency doubled Nd:YAG laser.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-11 | 1994-08-13 | 1995-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-11 | 1998-08-13 | 1999-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-11 | 2002-08-13 | 2003-02-12 | $7700.00 | Window Closed / Lapsed |