100 lines
4.1 KiB
Mathematica
100 lines
4.1 KiB
Mathematica
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%% - Create solver object with specified options
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clc
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%%
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OptionsStruct = struct;
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OptionsStruct.SimulationMode = '2D';
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OptionsStruct.TimeStep = 50e-06;
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OptionsStruct.SimulationTime = 04e-03;
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OptionsStruct.SpontaneousEmission = true;
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OptionsStruct.Sideband = true;
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OptionsStruct.ZeemanSlowerBeam = false;
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OptionsStruct.Gravity = true;
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OptionsStruct.DebugMode = false;
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OptionsStruct.SaveData = false;
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options = Helper.convertstruct2cell(OptionsStruct);
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Simulator = MOTSimulator(options{:});
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clear OptionsStruct
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%% - Set Initial Conditions: Run with default values
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Simulator.setInitialConditions();
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%% - Set Initial Conditions: Set manually
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OptionsStruct = struct;
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OptionsStruct.NumberOfAtoms = 5000;
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OptionsStruct.BluePower = 0.2; % in W
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OptionsStruct.BlueDetuning = -2 * Helper.PhysicsConstants.BlueLinewidth; % in Hz
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OptionsStruct.BlueBeamWaist = 0.010; % in m
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OptionsStruct.SidebandPower = 0.2;
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OptionsStruct.SidebandDetuning = -3 * Helper.PhysicsConstants.BlueLinewidth; % in Hz
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OptionsStruct.SidebandBeamWaist = 0.010; % in m
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OptionsStruct.PushBeamPower = 0.010; % in W
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OptionsStruct.PushBeamDetuning = 0; % in Hz
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OptionsStruct.PushBeamWaist = 0.005; % in m
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options = Helper.convertstruct2cell(OptionsStruct);
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Simulator.setInitialConditions(options{:});
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clear OptionsStruct
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%% - Run Simulation
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[LoadingRate, ~] = Simulator.runSimulation();
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%% - Plot initial distribution
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NumberOfBins = 100;
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Plotting.plotPositionAndVelocitySampling(Simulator, NumberOfBins);
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%% - Plot Magnetic Field
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XAxisRange = [-5 5];
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YAxisRange = [-5 5];
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ZAxisRange = [-5 5];
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Plotting.visualizeMagneticField(Simulator, XAxisRange, YAxisRange, ZAxisRange)
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%% - Scan parameters
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%Use a for loop to change the parameter during set initial conditions
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%Run simulation
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% TWO-PARAMETER SCAN
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NumberOfPointsForFirstParam = 10; %iterations of the simulation
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NumberOfPointsForSecondParam = 10;
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LoadingRateArray = zeros(NumberOfPointsForFirstParam, NumberOfPointsForSecondParam);
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% Scan Sideband Detuning and Power Ratio
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DetuningArray = linspace(-0.5,-10, NumberOfPointsForFirstParam);
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PowerArray = linspace(0.1,0.9, NumberOfPointsForSecondParam);
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tStart = tic;
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for i=1:NumberOfPointsForFirstParam
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OptionsStruct.SidebandDetuning = DetuningArray(i) * Helper.PhysicsConstants.BlueLinewidth;
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for j=1:NumberOfPointsForSecondParam
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OptionsStruct.BluePower = PowerArray(j) * Simulator.TotalPower;
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OptionsStruct.SidebandPower = Simulator.TotalPower - OptionsStruct.BluePower;
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options = Helper.convertstruct2cell(OptionsStruct);
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Simulator.setInitialConditions(options{:});
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tic
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[LoadingRate, ~] = Simulator.runSimulation();
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LoadingRateArray(i,j) = LoadingRate;
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end
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end
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tEnd = toc(tStart);
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fprintf('Total Computational Time: %0.1f seconds. \n', tEnd);
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%% - Plot results
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FirstParameterArray = DetuningArray * Helper.PhysicsConstants.BlueLinewidth;
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SecondParameterArray = (Simulator.TotalPower - (PowerArray * Simulator.TotalPower));
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QuantityOfInterestArray = LoadingRateArray;
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OptionsStruct = struct;
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OptionsStruct.RescalingFactorForFirstParameter = (Helper.PhysicsConstants.BlueLinewidth)^-1;
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OptionsStruct.XLabelString = 'Detuning (\Delta/\Gamma)';
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OptionsStruct.RescalingFactorForSecondParameter = 1000;
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OptionsStruct.YLabelString = 'Sideband Beam Power (mW)';
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OptionsStruct.ZLabelString = 'Loading rate (atoms/s)';
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OptionsStruct.TitleString = sprintf('Magnetic Gradient = %.0f (G/cm)', Simulator.MagneticGradient * 100);
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options = Helper.convertstruct2cell(OptionsStruct);
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Plotting.plotResultForTwoParameterScan(FirstParameterArray, SecondParameterArray, QuantityOfInterestArray, options{:})
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clear OptionsStruct
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