PDDetermineCharacterizations v1¶

PDDetermineCharacterizations dialog.

Table of Contents

Summary
Properties
Description
- Determing Frequency and Wavelength
- PropertyManager Contents
Source

Summary ¶

Determines the characterizations of a workspace.

Properties ¶

Name	Direction	Type	Default	Description
InputWorkspace	Input	MatrixWorkspace		Workspace with logs to help identify frequency and wavelength
Characterizations	Input	TableWorkspace		Table of characterization information
ReductionProperties	Input	string	__pd_reduction_properties	Property manager name for the reduction
BackRun	Input	int list	0	Empty container run to use. 0 to use value in table, -1 to not use.
NormRun	Input	int list	0	Normalization run to use. 0 to use value in table, -1 to not use.
NormBackRun	Input	int list	0	Normalization background run to use. 0 to use value in table, -1 to not use.
FrequencyLogNames	Input	str list	SpeedRequest1,Speed1,frequency	Candidate log names for frequency
WaveLengthLogNames	Input	str list	LambdaRequest,lambda	Candidate log names for wave length

This algorithm takes an InputWorkspace and Characterizations TableWorkspace and creates a PropertyManager with the appropriate characterization runs. This is done by determining the effective accelerator frequency and center wavelength and choosing the appropriate row from the table.

This algorithm is one of the workflow algorithms that helps SNSPowderReduction v1.

Determing Frequency and Wavelength ¶

The freqency is found by inspecting the logs (in order) “SpeedRequest1”, “Speed1”, and “frequency”. Whichever one has a nonzero value is used. Simlilarly, the wavelength is taken by inspecting “Lambda”. If either the frequency or wavelength cannot be determined, the algorithm will return a default PropertyManager with mostly zeros.

PropertyManager Contents ¶

The PropertyManager will have the following keys and values. Listed in the table is also their default values.

Name	Type	Default
frequency	double	0
wavelength	double	0
bank	integer	1
vanadium	integer	0
container	integer	0
empty	integer	0
d_min	string	“”
d_max	string	“”
tof_min	double	0
tof_max	double	0