<* $Id: xnd_r11e.html,v 1.1.1.1 2000/00/14 15:23:00 berar Exp $ *> XND 1.1 : Experiment header in the input file.

XND 1.1 : Experiment header in the input file.


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Introduction

The block has to be repeated for each different experience according to the nExp value declared in the program header; any experience can obviously contain more diagrams and any diagrams more phases. The experiment block contain the following header and variables blocks.

Experiment Header

Natured 0X-ray
1 neutron, single wavelenght
2 anomalous X-ray scattering
3 (neutron, reserved for magnetic structures)
Techn d 0X-ray Bragg-Brentano geometry (symmetric reflection)
0 neutron, single wavelenght (transmission)
1 (reserved for X-ray, asymmetric reflection)
2 (reserved for X-ray, linear detector)
3 (reserved for X-ray, courbed detector)
4 transmission with absorption correction
nDiag d number of diagrams collected in the experience
FileType d file type identifier (see Data File Formats)
nLambda d number of wavelenghts
nBkg d >0 number of points for background definition, common to all diagrams
<0 - number of points for background foreach diagram
TempOrig f origin of polynomial development
Title s title labelling the experience

Data identification

The following lines are repeated nDiag times. Its content depends on the FileType.
if (FileType=0) (simulation mode, no data to read)
Temp f value of Temp for the simulated diagram
2theta_0 f starting point of the diagram
Delta(2theta) f step
2theta_f f end point of the diagram
if (FileType=20 or 21) (multiples banks)
NPts d number of points on the data file
Temp_min d starting value of Temp
Cumul d 1 or the number of successive diagrams to be cumulated
Skipd 0 or the number of following diagrams to be skipped
NumVard control parameter, Temp is the Numvar parameter in the header
Monod 0 or value of the renormalization monitor
DataName s name of the data file
otherwise
Temp f value of Temp for the actual diagram
NPts d number of points in the data file, these value is only checked when a binary data file is used
Dataname s name of the data file


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JFB, June 25th, 1996 rev. March 25th, 1999