Lecture EDM SystematicErrors

Lecture EDM SystematicErrors - Lecture EDM Theory Lecture...

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Lecture EDM Theory Lecture Notes Text Coverage: same as other lecture outline How an EDM works: Carrier wavelength: Modulation Frequency: Modulation Wavelength: Speed of light in a vacuum: Speed of light in air: Basic formula for distance: 1 1 2 a N D m + = λ Systematic Errors in EDM work: A. Constant Errors 1. Glass (prism) constant. (GC) all expressed as corrections 2. Instrument Offset constant (IOC) 3. Total Offset constant (TOC) B. Scale Errors 4. Frequency count errors 5. PPM correction a. Standard atmosphere b. Formula for the refractive index: Given: Wavelength modulation frequency, f 0 = 14985.4 kHz Wavelength of infrared carrier beam, λ 1 = 0.900 μ m Modulation Wavelength, λ 0 = 20 m Velocity of light in a vacuum, V 0 = 299,792.458 km/sec Observe the Following at Time of Observations: p = Atmospheric pressure (Use average of 762.0 mmHg) t = Air temperature, ° C 1. Calculate the refractive index of air under standard conditions, n g : 2. Calculate the refractive index of air under the condition at time of observation, n a : (Eq. 1-4) 3.
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