[neutron-mc] mcresplot

Jörg Voigt j.voigt at fz-juelich.de
Mon Nov 7 17:20:22 CET 2005

I have some more question to the resolution components: 
1. If I use TOFRes_sample I have to set the time_width. I used now a value of 
5 µs, which  is the channel width of the sv29 spectrometer. Apparently this 
gives a very good energy resolution, when I modell a time focused instrument. 
Changing the value to 15 µs gives broadened energy distribution, that comes 
closer to reality. However, I don't understand, how I choose a correct value 
for this parameter.  In an instrument without time focusing, e.g. a tof-tof 
instrument, this parameter has only a weak influence.
2. If I use traget_index=+1, kf as determined by a subsequent Res_monitor with 
box shape is allways ~(0 0 kz) in my detector-file, no matter, how much I 
rotate the instrument. Do I have to rotate kf 'by hand'?
3. I still can't get mcresplot.pl working. However, I figured out a 
work-around in matlab, based on what I understand from the perl-script. As 
long as my data-array is not to big, I use the matlab text output and 
everything is fine. When it became bigger, I tried the binary output for 
matlab, but I can't import that output. 

Thank you all for any help

Am Mittwoch 02 November 2005 13:10 schrieb Peter Willendrup:
> Hello Jörg,
> On Wed, 2005-11-02 at 09:02 +0100, Jörg Voigt wrote:
> > has anybody translated the mcresplot perl script to matlab?. My Perl
> > knowledge is too little to get the meaning of all subroutines.
> A matlab (and even scilab) version of mcresplot is on the TODO list of
> McStas, meaning that we will put some effort into the task over the next
> few releases.
> > BTW, the help of the TOFRes_sample refers to a TOFRes_monitor, that I
> > can't find in the latest stable release. Does it exist or can the
> > Res_monitor do the same job?
> This is simply an inconsitency in the help of the TOFRes_sample
> component (which is only in CVS by the way). Use Res_monitor. The plan
> is to merge the very small changes made in TOFRes_sample into the
> original Res_sample, this should probably happen before the next
> release.
> Regards,
> Peter

Dr.Jörg Voigt
Institut für Streumethoden
Forschungszentrum Jülich
52424 Jülich
Tel: +49 2461 616020
Fax: +49 2461 612610
Mobil: +49 160 8479827
Email: j.voigt at fz-juelich.de

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