SANSCalculateTransmission dialog.
Table of Contents
| Name | Direction | Type | Default | Description |
|---|---|---|---|---|
| SANSState | Input | Dictionary | A property manager which fulfills the SANSState contract. | |
| TransmissionWorkspace | Input | MatrixWorkspace | Mandatory | The transmission workspace in time-of-flight units. |
| DirectWorkspace | Input | MatrixWorkspace | Mandatory | The direct workspace in time-of-flight units. |
| DataType | Input | string | Sample | The component of the instrument which is to be reduced. Allowed values: [‘Sample’, ‘Can’] |
| OutputWorkspace | Output | MatrixWorkspace | Mandatory | A calculated transmission workspace in units of wavelength. |
| UnfittedData | Output | MatrixWorkspace | Mandatory | An unfitted data in units of wavelength. |
This algorithm provides a transmission workspace for subsequent wavelength correction in Q1D v2 or Qxy v1. The settings of the algorithm are provided by the state object. The user provides a TransmissionWorkspace, DirectWorkspace and the data type which is to be used, ie Sample or Can. The OutputWorkspace is a fitted workspace, but the unfitted data set is available via UnfittedData.
Currently the mask mechanism is implemented for SANS2D, LOQ and LARMOR.
The required information for the transmission calculation is retrieved from a state object.
The elements are:
| Entry | Type | Description | Mandatory | Default |
|---|---|---|---|---|
| transmission_radius_on_detector | Float | A radius on the detector | No | None |
| transmission_roi_files | List of String | A list of ROI file names | No | None |
| transmission_mask_files | List of String | A list of mask file names | No | None |
| default_transmission_monitor | Integer | The default transmission monitor | auto setup | auto |
| transmission_monitor | Integer | The transmission monitor | No | None |
| default_incident_monitor | Integer | The default incident monitor | auto setup | auto |
| incident_monitor | Integer | The incident monitor | No | None |
| prompt_peak_correction_min | Float | Min time of the prompt peak | No | None |
| prompt_peak_correction_max | Float | Max time of the prompt peak | No | None |
| prompt_peak_correction_enabled | Bool | If using prompt peak correction | No | False |
| use_full_wavelength_range | Bool | If using full wavelength range | No | False |
| wavelength_full_range_low | Float | Min of instrument’s full wav. range | auto setup | auto |
| wavelength_full_range_high | Float | Max of instrument’s full wav. range | auto setup | auto |
| background_TOF_general_start | Float | General background corr. start time | No | None |
| background_TOF_general_stop | Float | General background corr. stop time | No | None |
| background_TOF_monitor_start | Dict | Monitor num vs background corr. start time | No | None |
| background_TOF_monitor_stop | Dict | Monitor num vs background corr. stop time | No | None |
| background_TOF_roi_start | Float | ROI background corr. start time | No | None |
| background_TOF_roi_stop | Float | ROI background corr. stop time | No | None |
| fit | Dict | DataType enum (Sample and Can) vs fit state | No | None |
There is a fit state for the sample and the can which contains the following settings:
| Entry | Type | Description | Mandatory | Default |
|---|---|---|---|---|
| fit_type | FitType enum | The type of fit, ie log, lin, poly. | No | log |
| polynomial_order | Integer | The polynomial order when using polynomial fitting | No | 0 |
| wavelength_low | Float | Lower wavelength bound | No | None |
| wavelength_high | Float | Upper wavelength bound | No | None |
Note that the prompt peak settings are automatically set up for LOQ
Note that these settings should be only populated via the GUI or the Python Interface of ISIS SANS.
Categories: Algorithms | SANS\Adjust
Python: SANSCalculateTransmission.py