Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction
A device and method for producing an ultra pure molecular beam of elemental molecules utilizing a reduced thermal gradient filament construction in an effusion cell is provided. The effusion cell comprises a crucible having an open and a closed end and at least one heating filament distributed immed...
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| creator | KESAN VIJAY P MATTORD TERRY J MATTORD TERRY TREETMAN BEN G STREETMAN BEN G |
| description | A device and method for producing an ultra pure molecular beam of elemental molecules utilizing a reduced thermal gradient filament construction in an effusion cell is provided. The effusion cell comprises a crucible having an open and a closed end and at least one heating filament distributed immediate the crucible. The at least one heating filament or filaments are provided having a first portion having a first pitch in proximal relationship to the open end of the crucible and having a second portion having a second pitch wherein the first pitch is of a higher spatial frequency than the second pitch. The heating filament is non-inductively wound about the crucible and positioned in conformity to the outside structure of the crucible. The heat shield is positioned proximate and about the crucible and heating filament or filaments. The heating filaments are connected to a controllable electric power supply producing a near constant temperature along the long axis of the crucible. By placing source material in the crucible and placing the crucible heating filaments and heat shield in a reduced pressure atmosphere and powering the heating filaments, a substantially constant temperature is produced along the crucible long axis resulting in an ultra pure molecular beam of elemental molecules of the source material. |
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| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_US5034604A</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>US5034604A</sourcerecordid><originalsourceid>FETCH-epo_espacenet_US5034604A3</originalsourceid><addsrcrecordid>eNqFjjFOQzEQRH9DgYAzsAcgUqQE-igCpU5IHW38xz-W1t6v9bqAK-WSOBLUVFPMe6O5H657ROPgal-EGFtNWihAhFxpQoGxg5gMs-nYQjoLXqiVFNUycRmpiRsv5magrILQhI3O4EwaCYKM4ix_HWq3PUn6TmXqq30SI_kFljs0GY-p8xST8E2koKW6teD91-NwF1kqnn7zYXj-eP_c7haY9YQ6c-h__XQ8vC5X67flerP6n_gBjCpZ0g</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction</title><source>esp@cenet</source><creator>KESAN; VIJAY P ; MATTORD; TERRY J ; MATTORD; TERRY ; TREETMAN; BEN G ; STREETMAN; BEN G</creator><creatorcontrib>KESAN; VIJAY P ; MATTORD; TERRY J ; MATTORD; TERRY ; TREETMAN; BEN G ; STREETMAN; BEN G</creatorcontrib><description>A device and method for producing an ultra pure molecular beam of elemental molecules utilizing a reduced thermal gradient filament construction in an effusion cell is provided. The effusion cell comprises a crucible having an open and a closed end and at least one heating filament distributed immediate the crucible. The at least one heating filament or filaments are provided having a first portion having a first pitch in proximal relationship to the open end of the crucible and having a second portion having a second pitch wherein the first pitch is of a higher spatial frequency than the second pitch. The heating filament is non-inductively wound about the crucible and positioned in conformity to the outside structure of the crucible. The heat shield is positioned proximate and about the crucible and heating filament or filaments. The heating filaments are connected to a controllable electric power supply producing a near constant temperature along the long axis of the crucible. By placing source material in the crucible and placing the crucible heating filaments and heat shield in a reduced pressure atmosphere and powering the heating filaments, a substantially constant temperature is produced along the crucible long axis resulting in an ultra pure molecular beam of elemental molecules of the source material.</description><language>eng</language><subject>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE ; APPARATUS THEREFOR ; CHEMICAL SURFACE TREATMENT ; CHEMISTRY ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL ; COATING MATERIAL WITH METALLIC MATERIAL ; COATING METALLIC MATERIAL ; CRYSTAL GROWTH ; DIFFUSION TREATMENT OF METALLIC MATERIAL ; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL ; METALLURGY ; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; REFINING BY ZONE-MELTING OF MATERIAL ; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE ; SINGLE-CRYSTAL-GROWTH ; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION ; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</subject><creationdate>1991</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910723&DB=EPODOC&CC=US&NR=5034604A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910723&DB=EPODOC&CC=US&NR=5034604A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>KESAN; VIJAY P</creatorcontrib><creatorcontrib>MATTORD; TERRY J</creatorcontrib><creatorcontrib>MATTORD; TERRY</creatorcontrib><creatorcontrib>TREETMAN; BEN G</creatorcontrib><creatorcontrib>STREETMAN; BEN G</creatorcontrib><title>Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction</title><description>A device and method for producing an ultra pure molecular beam of elemental molecules utilizing a reduced thermal gradient filament construction in an effusion cell is provided. The effusion cell comprises a crucible having an open and a closed end and at least one heating filament distributed immediate the crucible. The at least one heating filament or filaments are provided having a first portion having a first pitch in proximal relationship to the open end of the crucible and having a second portion having a second pitch wherein the first pitch is of a higher spatial frequency than the second pitch. The heating filament is non-inductively wound about the crucible and positioned in conformity to the outside structure of the crucible. The heat shield is positioned proximate and about the crucible and heating filament or filaments. The heating filaments are connected to a controllable electric power supply producing a near constant temperature along the long axis of the crucible. By placing source material in the crucible and placing the crucible heating filaments and heat shield in a reduced pressure atmosphere and powering the heating filaments, a substantially constant temperature is produced along the crucible long axis resulting in an ultra pure molecular beam of elemental molecules of the source material.</description><subject>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE</subject><subject>APPARATUS THEREFOR</subject><subject>CHEMICAL SURFACE TREATMENT</subject><subject>CHEMISTRY</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</subject><subject>COATING MATERIAL WITH METALLIC MATERIAL</subject><subject>COATING METALLIC MATERIAL</subject><subject>CRYSTAL GROWTH</subject><subject>DIFFUSION TREATMENT OF METALLIC MATERIAL</subject><subject>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</subject><subject>METALLURGY</subject><subject>PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</subject><subject>REFINING BY ZONE-MELTING OF MATERIAL</subject><subject>SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</subject><subject>SINGLE-CRYSTAL-GROWTH</subject><subject>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</subject><subject>UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNqFjjFOQzEQRH9DgYAzsAcgUqQE-igCpU5IHW38xz-W1t6v9bqAK-WSOBLUVFPMe6O5H657ROPgal-EGFtNWihAhFxpQoGxg5gMs-nYQjoLXqiVFNUycRmpiRsv5magrILQhI3O4EwaCYKM4ix_HWq3PUn6TmXqq30SI_kFljs0GY-p8xST8E2koKW6teD91-NwF1kqnn7zYXj-eP_c7haY9YQ6c-h__XQ8vC5X67flerP6n_gBjCpZ0g</recordid><startdate>19910723</startdate><enddate>19910723</enddate><creator>KESAN; VIJAY P</creator><creator>MATTORD; TERRY J</creator><creator>MATTORD; TERRY</creator><creator>TREETMAN; BEN G</creator><creator>STREETMAN; BEN G</creator><scope>EVB</scope></search><sort><creationdate>19910723</creationdate><title>Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction</title><author>KESAN; VIJAY P ; MATTORD; TERRY J ; MATTORD; TERRY ; TREETMAN; BEN G ; STREETMAN; BEN G</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US5034604A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1991</creationdate><topic>AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE</topic><topic>APPARATUS THEREFOR</topic><topic>CHEMICAL SURFACE TREATMENT</topic><topic>CHEMISTRY</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL</topic><topic>COATING MATERIAL WITH METALLIC MATERIAL</topic><topic>COATING METALLIC MATERIAL</topic><topic>CRYSTAL GROWTH</topic><topic>DIFFUSION TREATMENT OF METALLIC MATERIAL</topic><topic>INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL</topic><topic>METALLURGY</topic><topic>PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</topic><topic>REFINING BY ZONE-MELTING OF MATERIAL</topic><topic>SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE</topic><topic>SINGLE-CRYSTAL-GROWTH</topic><topic>SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION</topic><topic>UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL</topic><toplevel>online_resources</toplevel><creatorcontrib>KESAN; VIJAY P</creatorcontrib><creatorcontrib>MATTORD; TERRY J</creatorcontrib><creatorcontrib>MATTORD; TERRY</creatorcontrib><creatorcontrib>TREETMAN; BEN G</creatorcontrib><creatorcontrib>STREETMAN; BEN G</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>KESAN; VIJAY P</au><au>MATTORD; TERRY J</au><au>MATTORD; TERRY</au><au>TREETMAN; BEN G</au><au>STREETMAN; BEN G</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction</title><date>1991-07-23</date><risdate>1991</risdate><abstract>A device and method for producing an ultra pure molecular beam of elemental molecules utilizing a reduced thermal gradient filament construction in an effusion cell is provided. The effusion cell comprises a crucible having an open and a closed end and at least one heating filament distributed immediate the crucible. The at least one heating filament or filaments are provided having a first portion having a first pitch in proximal relationship to the open end of the crucible and having a second portion having a second pitch wherein the first pitch is of a higher spatial frequency than the second pitch. The heating filament is non-inductively wound about the crucible and positioned in conformity to the outside structure of the crucible. The heat shield is positioned proximate and about the crucible and heating filament or filaments. The heating filaments are connected to a controllable electric power supply producing a near constant temperature along the long axis of the crucible. By placing source material in the crucible and placing the crucible heating filaments and heat shield in a reduced pressure atmosphere and powering the heating filaments, a substantially constant temperature is produced along the crucible long axis resulting in an ultra pure molecular beam of elemental molecules of the source material.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE APPARATUS THEREFOR CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL CRYSTAL GROWTH DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE REFINING BY ZONE-MELTING OF MATERIAL SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE SINGLE-CRYSTAL-GROWTH SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL |
| title | Refractory effusion cell to generate a reproducible, uniform and ultra-pure molecular beam of elemental molecules, utilizing reduced thermal gradient filament construction |
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