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Equation for the volume magnetic susceptibility of moist air

R S Davis

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The volume magnetic susceptibility of moist air χm(ma) is needed to correct the results of certain experiments to vacuum conditions. This paper derives an appropriate equation for χm(ma) for which pressure, temperature, relative humidity, and carbon dioxide content are variable parameters. The derived equation also depends sensitively on the molar susceptibility of oxygen, for which the handbook values are inconsistent by about 1.4%. The equation resolves this discrepancy in part.


PACS

07.55.Jg Magnetometers for susceptibility, magnetic moment, and magnetization measurements

92.60.hv Pressure, density, and temperature

06.20.F- Units and standards

07.07.Vx Hygrometers

94.80.+g Instrumentation for aeronomy and magnetospheric studies

Subjects

Instrumentation and measurement

Plasma physics

Environmental and Earth science

Dates

Issue 1 (February 1998)



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