\(\renewcommand\AA{\unicode{x212B}}\)

SavePHX v1

Enable screenshots using DOCS_SCREENSHOTS in CMake

Summary

Writes the detector geometry information of a workspace into a PHX format file.

See Also

SaveSPE

Properties

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace	Mandatory	The input workspace
Filename	Input	string	Mandatory	The filename to use for the saved data

Description

Saves the geometry information of the detectors in a workspace into a PHX format ASCII file. The angular positions and angular sizes of the detectors are calculated using FindDetectorsPar v1 algorithm.

Mantid generated PHX file is an ASCII file consisting of the header and 7 text columns. Header contains the number of the rows in the phx file excluding the header (number of detectors). The column has the following information about a detector:

Column Number	Column Description
1st	secondary flightpath,e.g. sample to detector distance (m)
2nd	0
3rd	scattering angle (deg)
4th	azimuthal angle (deg) (west bank = 0 deg, north bank = 90 deg etc.) Note the reversed sign convention wrt the .par files. For details, see: SavePAR v1
5th	angular width e.g. delta scattered angle (deg)
6th	angular height e.g. delta azimuthal angle (deg)
7th	detector ID   – this is Mantid specific value, which may not hold similar meaning in files written by different applications.

In standard phx file only the columns 3,4,5 and 6 contain useful information. You can expect to find column 1 to be the secondary flightpath and the column 7 – the detector ID in Mantid-generated phx files only.

Usage

Example - Save PHX file

# import os functions to work with folders
import os
# create sample workspace
ws=CreateSampleWorkspace()
# test file name
file_name = os.path.join(config["defaultsave.directory"], "TestSavePhx.phx")
 # save the file
SavePHX(ws,Filename=file_name);

print("target file exists? {0}".format(os.path.exists(file_name)))

Output:

target file exists? True

Categories: AlgorithmIndex | DataHandling\SPE | Inelastic\DataHandling

Source

C++ header: SavePHX.h

C++ source: SavePHX.cpp