McStas

[P. Horn]

Hello!

At working with McStas i found a bug in the component Monochromator at
line 59. The instrument definition i attached to this e-mail should
reproduce the error or not.

Something else:
What else monitors are existing now? 
I have only seen the official and unofficial components on your
McStas-pages.

I have written a Monitor wich gives a 2D-output of the energy an the
vertical divergence. Do you want it?

Thanks a lot in forward.


Pay Schulze Horn
-------------- next part --------------
DEFINE INSTRUMENT mono_bug()
DECLARE
%{
double mono_q, lambda_zero, e_zero;
%}

INITIALIZE
%{
lambda_zero=5;
e_zero=((2*PI)/lambda_zero)*((2*PI)/lambda_zero)*K2V*K2V*VS2E;
mono_q=4*PI*sin(DEG2RAD*45)/lambda_zero; /* Here is the angle 45 deg not 80 */
%}

TRACE
COMPONENT a1=Arm()
	AT (0,0,0) ABSOLUTE
	ROTATED (0,0,0) ABSOLUTE
COMPONENT s=Source_div(
		width=0.001,
		height=0.001,
		hdiv=0,
		vdiv=0,
		E0=e_zero,
		dE=0)
	AT (0,0,0) RELATIVE a1
	ROTATED (0,0,0) RELATIVE a1
COMPONENT m1=Monochromator(
		zmin=-0.5,
		zmax=0.5,
		ymin=-0.5,
		ymax=0.5,
		mosaich=15,
		mosaicv=15,
		r0=1,
		Q=mono_q)
	AT (0,0,0.2) RELATIVE a1
	ROTATED (0,40,0) RELATIVE a1
COMPONENT a2=Arm()
	AT (0,0,0.3) RELATIVE a1
	ROTATED (0,80,0) RELATIVE a1  /* But here is an angle above twice of the
												mosiaic.*/
COMPONENT moni1=Monitor(
		xmin=-0.3,
		xmax=0.3,
		ymin=-0.3,
		ymax=0.3)
	AT (0,0,0.2) RELATIVE a2
	ROTATED (0,0,0) RELATIVE a2
END