CA1121858A
Expired / Lapsed
CA
⏱️ 0.0 years remaining
Electron multiplier device
Assignee: Université Laval
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Filing: 1978-10-13
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Granted: 1982-04-13
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Expires: 1998-10-13
Abstract
Abstract ABSTRACT OF THE DISCLOSURE An electron multiplier device formed of the combination of a support made of high temperature-resisting electrically-insulating ceramic material and of a layer of secondary electron emitting semi-conducting glass material fused to the inner wall of the ceramic material; the multiplier device is further characterized in that the ceramic material and the glass material have substantially the same coefficient of expansion and that the support has an inner channel, the ratio of channel length to diameter being at least about 70; the glass material is deposited by flowing molten through the channel under gas pressure and cooling.
Inventors
- 👤 Jean-Denis Carette
- 👤 Claude Bouchard
Bibliographic Details
Application Number
—
Jurisdiction
CA
Data Source
google_patents
Last Synchronized
2026-11-03 13:11
CPC Classifications
H; H01; H01J; H01J43/00; H01J43/04; H01J43/06; H01J43/16; H01J9/00; H01J9/02; H01J9/12; H01J9/125; H01J2201/00; H01J2201/32
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
80 words
An electron multiplier device comprising: a support made of high temperature-resisting electrically-insulating ceramic material, said support having an internal wall defining a channel therethrough, the ratio of the channel length to diameter being at least about 70; a layer of secondary electron emitting semi-conducting glass material fused to said inner wall; said ceramic material and said glass material having the same coefficient of expansion, said glass material being deposited by flowing molten through said channel under gas pressure and cooling.
Claim 2
Dependent Claim
80 words
An electron multiplier device comprising: a support made of high temperature-resisting electrically-insulating ceramic material, said support having an internal wall defining a channel therethrough, the ratio of the channel length to diameter being at least about 70; a layer of secondary electron emitting semi-conducting glass material fused to said inner wall; said ceramic material and said glass material having the same coefficient of expansion, said glass material being deposited by flowing molten through said channel under gas pressure and cooling.
Claim 3
Dependent Claim
16 words
An electron multiplier device as defined in Claim 1, wherein said glass material is superficially semi-conducting.
Claim 4
Dependent Claim
21 words
An electron multiplier device as defined in Claim 1, comprising a soldering zone between said semi-conducting glass and said ceramic support.
Claim 5
Dependent Claim
16 words
An electron multiplier device as defined in Claim 1, wherein said ceramic is machinable or moldable.
Claim 6
Dependent Claim
24 words
An electron multiplier device as defined in Claim 1, wherein said ceramic material and said glass material define a body having a funnel entrance.
Claim 7
Dependent Claim
14 words
An electron multiplier device as defined in Claim 5, wherein said body is tubular.
Claim 8
Dependent Claim
28 words
An electron multiplier device as defined in Claim 5, wherein said body has on the outer wall thereof a protruber-ance for support and grooves for attaching electrical contacts.
Claim 9
Dependent Claim
22 words
An electron multiplier device as defined in Claim 7, further comprising a metallic layer connecting said semi-conducting glass material to said grooves.
Claim 10
Dependent Claim
18 words
An electron multiplier device as defined in Claim 6, wherein said channel in said tubular body is straight.
Claim 11
Dependent Claim
24 words
An electron multiplier device as defined in Claim 1, wherein said ceramic material is formed of two pieces soldered together by said semi-conducting glass.
Claim 12
Dependent Claim
26 words
An electron multiplier device as defined in Claim 10, wherein one of said pieces includes a helical groove extending the length thereof on its peripheral surface.
Claim 13
Dependent Claim
68 words
An electron multiplier device as defined in Claim 10, wherein both pieces are connected in a sandwich arrangement, each piece having opposite contacting faces with grooves and a half-cone machined or molded therein defining said channel when said pieces are sandwiched together; metallic means for attaching said pieces together; said metallic means being selected to match the coefficient of expansion of said semi-conducting glass and said ceramic material.
Claim 14
Dependent Claim
49 words
An electron multiplier device as defined in Claim 1, wherein said ceramic material and said glass material have different fusion points so that said glass material can be etched and a new semi-conductive glass layer rebuilt on said ceramic material when the emissive surface of said multiplier is deteriorated.
Claim 15
Dependent Claim
24 words
An electron multiplier formed of a plurality of devices as defined in Claim 1, said devices being connected in parallel and being stacked together.
Claim 16
Independent Claim
66 words
A method of making an electron multiplier device comprising the steps of: pouring molten semi-conducting glass into at least one channel in a ceramic support having a higher fusion point than that of said glass and having the same coefficient of expansion; flowing the glass under inert gas pressure through said channel; and cooling said support and channel to leave a semi-conducting wall to said channel.
Claim 17
Independent Claim
66 words
A method of making an electron multiplier device comprising the steps of: pouring molten semi-conducting glass into at least one channel in a ceramic support having a higher fusion point than that of said glass and having the same coefficient of expansion; flowing the glass under inert gas pressure through said channel; and cooling said support and channel to leave a semi-conducting wall to said channel.
Claim 18
Dependent Claim
28 words
A method as in Claim 15, including the further step of flowing a reducing gas through said channel to produce a semi-conductive and emissive film on the glass.
Claim 19
Dependent Claim
21 words
A method as in Claim 15, wherein said step of pouring includes pouring a glass formed from a mixture of oxides.
References Cited (Backward Citations)
No citation records indexed.
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