MOTDen: MOT Density Calculation

Description Usage Arguments Details

Description

MOTDen calculates the density of Rydberg atoms in the MOT.

Usage

1
MOTDen(MOTDataFrame, show_plot = FALSE)

Arguments

MOTDataFrame

a data frame. This data frame includes both the time axis (x-axis) and the voltage/signal axis (y-axis)

show_plot

a logical. This option produces a plot of the original data and the new gaussian fit if set to TRUE.

Details

This function calculates the density of Rydberg atoms in the MOT for a given MOT trace. It takes a data frame and, using trapz and fitG, computes the integral of the MOT fluorescence and it's full-width at half-maximum (FWHM). To get the total integral of the MOT, it is assumed that the MOT is a Gaussian in all dimensions. It then calculates the total number of atoms by converting the integral of the MOT fluorescence into the power and dividing that by the power per photon emitted. The number of Rydberg atoms takes the total number of atoms and divides it by 3.5. This is a compromise between cases where 1/3 of the atoms enter the Rydberg state and 1/4 of the atoms enter the Rydberg state.

The function returns the density in atoms/cm^{-1}.

Note: This is only for excitation to a single Rydberg state! For excitation to multiple states, the number of Rydberg atoms compared to the total number of atoms needs to be adjusted.

This is an R implementation of the pcamera function/script written by Mary Kutteruf for Matlab.


bgrich/JLstartup documentation built on May 12, 2019, 8:21 p.m.