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Title: Miniature thermo-electric cooled cryogenic pump

Abstract

A miniature thermo-electric cooled cryogenic pump for removing residual water molecules from an inlet sample prior to sample analysis in a mass spectroscopy system, such as ion cyclotron resonance (ICR) mass spectroscopy. The cryogenic pump is a battery operated, low power (<1.6 watts) pump with a .DELTA.T=100.degree. C. characteristic. The pump operates under vacuum pressures of 5.times.10.sup.-4 Torr to ultra high vacuum (UHV) conditions in the range of 1.times.10.sup.-7 to 3.times.10.sup.-9 Torr and will typically remove partial pressure, 2.times.10.sup.-7 Torr, residual water vapor. The cryogenic pump basically consists of an inlet flange piece, a copper heat sink with a square internal bore, four two tier Peltier (TEC) chips, a copper low temperature square cross sectional tubulation, an electronic receptacle, and an exit flange piece, with the low temperature tubulation being retained in the heat sink at a bias angle of 5.degree., and with the TECs being positioned in parallel to each other with a positive potential being applied to the top tier thereof.

Inventors:
 [1]
  1. Valley Springs, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
871229
Patent Number(s):
5687575
Assignee:
Regents of University of California (Oakland, CA)
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
miniature; thermo-electric; cooled; cryogenic; pump; removing; residual; water; molecules; inlet; sample; prior; analysis; mass; spectroscopy; cyclotron; resonance; icr; battery; operated; power; watts; delta; 100; degree; characteristic; operates; vacuum; pressures; times; 10; -4; torr; ultra; uhv; conditions; range; -7; -9; typically; remove; partial; pressure; vapor; basically; consists; flange; piece; copper; heat; sink; square; internal; bore; tier; peltier; tec; chips; temperature; sectional; tubulation; electronic; receptacle; exit; retained; bias; angle; tecs; positioned; parallel; positive; potential; applied; top; basically consists; cryogenic pump; battery operated; internal bore; vacuum pressure; heat sink; water vapor; partial pressure; cyclotron resonance; mass spectroscopy; removing residual; residual water; sample analysis; water molecules; vacuum pressures; sample prior; positive potential; miniature thermo-electric; thermo-electric cooled; cooled cryogenic; /62/165/

Citation Formats

Keville, Robert F. Miniature thermo-electric cooled cryogenic pump. United States: N. p., 1997. Web.
Keville, Robert F. Miniature thermo-electric cooled cryogenic pump. United States.
Keville, Robert F. Wed . "Miniature thermo-electric cooled cryogenic pump". United States. https://www.osti.gov/servlets/purl/871229.
@article{osti_871229,
title = {Miniature thermo-electric cooled cryogenic pump},
author = {Keville, Robert F},
abstractNote = {A miniature thermo-electric cooled cryogenic pump for removing residual water molecules from an inlet sample prior to sample analysis in a mass spectroscopy system, such as ion cyclotron resonance (ICR) mass spectroscopy. The cryogenic pump is a battery operated, low power (<1.6 watts) pump with a .DELTA.T=100.degree. C. characteristic. The pump operates under vacuum pressures of 5.times.10.sup.-4 Torr to ultra high vacuum (UHV) conditions in the range of 1.times.10.sup.-7 to 3.times.10.sup.-9 Torr and will typically remove partial pressure, 2.times.10.sup.-7 Torr, residual water vapor. The cryogenic pump basically consists of an inlet flange piece, a copper heat sink with a square internal bore, four two tier Peltier (TEC) chips, a copper low temperature square cross sectional tubulation, an electronic receptacle, and an exit flange piece, with the low temperature tubulation being retained in the heat sink at a bias angle of 5.degree., and with the TECs being positioned in parallel to each other with a positive potential being applied to the top tier thereof.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

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