Rotary turret and reusable specimen holder for mass spectrometer

Patent · Fri Jan 01 00:00:00 EST 1988

OSTI ID:866593

Banar, Joseph C ^[1]; Perrin, Richard E ^[2]; Ostrenga, Raymond A ^[1]

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1. Los Alamos, NM
2. Jemez Springs, NM

A sample holder for use in a mass spectrometer is provided for heating a sample to discharge ions through an electrostatic field which focuses and accelerates the ions for analysis. Individual specimen holders form a plurality of filaments for heating the sample materials for ion emission. Mounting devices hold the plurality of filaments at regular spaced apart angles in a closed configuration adjacent the electrostatic field elements. A substantially solid ceramic turret is provided with a plurality of electrical contacts which engage the individual holder means for energizing the filaments and forming a corresponding plurality of radially facing, axially extending first conductive surfaces. A substantially solid stationary turret bearing member is mounted about the rotating turret with a plurality of radially biased second electrical conductive surfaces, mounted to electrically contact facing ones of the plurality of radially facing first conductive surfaces. The assembly provides a large thermal mass for thermal stability and large electrical contact areas for repeatable, stable power input for heating the sample materials. An improved sample holder is also provided having a ceramic body portion for removably engaging conductive wires. The conductive wires are compatible with a selected filament element and the sample material to be analyzed.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4745277
• OSTI ID: 866593
• Country of Publication: United States
• Language: English

Related Subjects

rotary
turret
reusable
specimen
holder
mass
spectrometer
sample
provided
heating
discharge
electrostatic
field
focuses
accelerates
analysis
individual
holders
form
plurality
filaments
materials
emission
mounting
devices
hold
regular
spaced
apart
angles
closed
configuration
adjacent
elements
substantially
solid
ceramic
electrical
contacts
engage
means
energizing
forming
corresponding
radially
facing
axially
extending
conductive
surfaces
stationary
bearing
mounted
rotating
biased
electrically
contact
ones
assembly
provides
thermal
stability
repeatable
stable
power
input
improved
portion
removably
engaging
wires
compatible
selected
filament
element
material
analyzed
sample materials
conductive surfaces
mounting device
substantially solid
thermal stability
power input
electrical contacts
assembly provides
sample holder
mass spectrometer
electrical contact
spaced apart
electrostatic field
sample material
axially extending
thermal mass
solid ceramic
specimen holder
electrical conductive
conductive wires
corresponding plurality
conductive surface
improved sample
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