PotentialWell.m
a3531b44407cgeom_test

PotentialWell.m
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			function [pot] = PotentialWell(Phi,Atheta,r,z,creategraph)
			%PotentialWell Computes and display the potential well given the electrostatic potential Phi
			% and the magnetic vector potential Atheta
			if nargin <5
			creategraph=true;
			end
			[rgrid,~]=meshgrid(r,z);
			rAthet=(rgrid.*Atheta)';
			contpoints=contourc(z,r,rAthet,rAthet(:,1)');
			[x,y,zcont]=C2xyz(contpoints);
			k=1;
			zdiff=[diff(zcont),0];
			for j=1:size(x,2)
			%for i=1:size(pot,1)
			xloc=x{j};
			yloc=y{j};
			xloc=xloc(yloc<r(end) & yloc>r(1));
			yloc=yloc(yloc<r(end) & yloc>r(1));
			x{j}=xloc;
			y{j}=yloc;
			if(length(xloc)>1)
			pot{j}=interp2(z,r,Phi,xloc,yloc);
			pot{j}=pot{j}-min(pot{j});
			end
			k=k+(zdiff(j)~=0);
			end
			x=cell2mat(x);
			y=cell2mat(y);
			pot=cell2mat(pot);
			[Z,R]=meshgrid(z,r);
			pot=griddata(x,y,pot,Z,R);
			if(creategraph)
			figure
			surface(z(2:end),r(2:end),-pot(2:end,2:end),'edgecolor','none')
			xlabel('r')
			ylabel('z')
			colorbar
			end
			end