bd97ffc5d8Changed the default values of the radius and waist of the Blue and Blue Sideband beams.Karthik Chandrashekara2021-07-19 12:42:34 +02:00
7a903bc6deWrapped scan functionality in to functions that now exist separately in the Scan folder within the Simulator package, added a scanning and plotting function for a three parameter scan, corresponding scripting changes shown in the test script.Karthik Chandrashekara2021-07-18 07:07:48 +02:00
c19a514027Added back the captured atom counting and the jackknife error estimation method as developed by Jianshun Gao, retained the bootstrap method and the counting that goes with it now corrected to prevent counting the same atoms repeatedly and also to reduce the atom count if they are lost. There is now an agreement between the two methods as to what the loading rate is with the bootstrap method giving a slightly lower estimate.Karthik Chandrashekara2021-07-16 15:57:16 +02:00
5407da354bAdded results property to store the final results of a scan to later save the whole object along with its properties so as to have a way of going back and checking the values for the parameters used.Karthik Chandrashekara2021-07-16 15:53:19 +02:00
4051549b27Increase of 5% was meant for cut-off velocity and not the capture velocity, correction was made accordingly.Karthik Chandrashekara2021-07-16 15:50:08 +02:00
0238e5d312Added option to switch between Bootstrap and Jackknife error estimation methods, changed sideband beam flag name, removed zeeman slower beam flag which can be added later following development of the ThreeDimensionalMOT class and functionalities.Karthik Chandrashekara2021-07-16 15:49:02 +02:00
e808c3dbfbDivergence Angle is now calculated by taking the arctan of d/y, velocity condition was removed.Karthik Chandrashekara2021-07-15 16:52:07 +02:00
b29baf29d5Introduced back the normalization for the integration of the velocity distribution because average velocity was multiplied back in the calculation of the flux, added the missing end for parfor loop.Karthik Chandrashekara2021-07-15 16:47:13 +02:00
504b7769f9Removed multiplication of isotopic abundance, restored average velocity multiplication and made corresponding changes elsewhere.Karthik Chandrashekara2021-07-15 16:45:25 +02:00
b34078436aRemoved normalization of the velocity distribution of atoms coming out of the oven since the average velocity multiplication in the total flux inside the oven calculation was removed as they cancel each other.Karthik Chandrashekara2021-07-14 20:06:59 +02:00
6cde617bb4Fixed the Saturation parameter calculation was not indexing over the local saturation intensity array.Karthik Chandrashekara2021-07-14 20:05:40 +02:00
411375b464Average velocity of the distribution of atoms inside the oven here cancels with the normalization of the distribution of atoms coming out of the oven so it can be removed as long as that normalization is also removed!Karthik Chandrashekara2021-07-14 20:04:34 +02:00
f789a7ad6aModified to determine the distance between atom and the z-axis and checked to see if that is within the diameter of the beams - this makes sense since the beams are crossed and the condition that the distance be smaller than the beam diameter holds only along the y-axis.Karthik Chandrashekara2021-07-11 14:51:17 +02:00
5b91c20246Major changes - rewrote how autocorrelation, resampling and determination of loading rate is done.Karthik Chandrashekara2021-07-11 14:47:13 +02:00
a41ae74cb7Cosmetic changes only, changed a few variable names, dynamical quantities for all atoms across the full simulation time are now returned instead of just the final values.Karthik Chandrashekara2021-07-11 14:43:36 +02:00
b4e28e09dbWrapped the calculation of the "reduced" Clausing factor - which is the probability of an atom exiting from the oven within a smaller solid angle as determined by the apertures/orifices along the way.Karthik Chandrashekara2021-07-11 14:40:43 +02:00
bb5f70ce7fWrapped the calculation of the collision event probability in its own function.Karthik Chandrashekara2021-07-11 14:39:26 +02:00
951c2e3935Determines the distribution of times spent by atom in the MOT interaction volume to be used to compute the collision probability between the incoming hot atoms and the atoms slowed near the center of the MOT.Karthik Chandrashekara2021-07-11 14:38:37 +02:00
b6d56e9e7bWrapped the exit condition in to its own function now checking if the position, velocity meet certain criteria and account for collision events.Karthik Chandrashekara2021-07-11 14:35:54 +02:00
058fa0fb19Change of variable names, new properties included along with their getters and setters, increased limit on number of trajectories to be computed, corrections to formulae calculating saturation parameters and average velocity.Karthik Chandrashekara2021-07-11 14:34:19 +02:00
e16ac42415Moved calculations of capture velocity, cut-off, reduced Clausing factor and reduced flux to here, changed the condition for the velocity sampling to correctly sample from the normalized probability distributions.Karthik Chandrashekara2021-07-11 06:40:19 +02:00
47a93001c8Added a switch to change between 2D and 3D MOT cases to allow for this code to be expanded and generalized in the future.Karthik Chandrashekara2021-07-11 06:36:49 +02:00
e17015d181Added the option to save the Confidence Interval of the obtained loading rate for each scan point.Karthik Chandrashekara2021-07-11 06:34:51 +02:00
64216d2086Wrapped the distance between a point and a line calculation in a Helper function.Karthik Chandrashekara2021-07-11 06:30:06 +02:00
04b395b6adRemoved the multiplication of the full Clausing Factor since the correct flux coming out of the oven is obtained by accounting for the clipping by the aperture which is done by numerically integrating the angular distribution till the exit divergence angle that is limited by the aperture to obtain what is called the "reduced" Clausing Factor. This is calculated in the initialVelocitySampling and multiplied to this flux to get the "reduced" flux.Karthik Chandrashekara2021-07-11 06:28:50 +02:00
94067499f2Includes calculation of the Clausing Factor from an analytic expression (obtained from the Etienne Staub Master thesis) and an approximation.Karthik Chandrashekara2021-07-11 06:24:27 +02:00
c8218c1bc4Major change how the loading rate is calculated from the raw output of the simulator - Zero crossing of the autocorrelation of the time series - which is the number of loaded atoms at each time step - is used to determine the length of each of a 1000 bootstrap samples obtained by sampling with replacement. Mean in each sample is calculated and a sampling distribution of means obtained. The capture ratio is the mean of this distribution which when multiplied by the "reduced" flux gives the loading rate. Standard Error and 95% confidence interval are also calculated from the sampling distribution.Karthik Chandrashekara2021-07-11 06:22:44 +02:00
1a8975c218Added a switch to change between 2D and 3D MOT cases to allow for this code to be expanded and generalized in the future.Karthik Chandrashekara2021-07-11 06:18:21 +02:00
960bd02f8bCosmetic changes like the change of variable names to reflect their correct definition and use.Karthik Chandrashekara2021-07-11 06:15:02 +02:00
4096e685a1Corrected errors in the formula for the acceleration due to the push beam.Karthik Chandrashekara2021-07-11 06:13:49 +02:00
4f28af7e10New functions to calculate the distance of a point from a line and find all zero crossings from a vector/1-D array.Karthik Chandrashekara2021-07-11 06:10:23 +02:00
1ef2cf4ae0Some cosmetic changes and additions to showcase the use of newly included plotting routines.Karthik Chandrashekara2021-07-11 06:08:48 +02:00
ae0b19fef0Plots velocity sampling in terms of its magnitude (up to the cut-off) and direction (up to the exit divergence).Karthik Chandrashekara2021-07-11 06:07:17 +02:00
271b180d27Included the option for removing outliers and indicate the confidence interval as a shaded region.Karthik Chandrashekara2021-07-11 06:05:24 +02:00
b3a6f61d75Modified to have the "reduced" Clausing Factor calculated from the angular distributions for different beta multiplied to the total flux.Karthik Chandrashekara2021-07-11 06:02:53 +02:00
e80c68ef2aChanged sampling of angle such that it is up to NozzleExitDivergence not MOTExitDivergence, made some other cosmetic changes.Karthik Chandrashekara2021-07-11 06:00:08 +02:00
d0b4d0b9b8More cosmetic changes, corrections to some calculations like the one of flux, re-wrote how one and two parameter scans are done with functions, added a save option to save the entire simulator object with its properties and their values along with the results.Karthik Chandrashekara2021-07-04 20:24:38 +02:00
add5d02ae3Added new plotting routines that allow for checks, minor cosmetic changes to other scripts.Karthik Chandrashekara2021-07-03 10:19:27 +02:00
d88d4d683dThis is a class for simulating the capture process for Dy atoms in the 2-D and 3-D MOTs, including the dynamics from the push beam and slower beams.Karthik Chandrashekara2021-06-29 15:44:28 +02:00
Karthik Chandrashekara