...
Under Construction!
Logging InAnchor Logging In Logging In
...
After you successfully log in with your User Portal credentials, you will be asked to enter your beam line computer account. This is the username that your group has been given and typically starts with "b_". You will also need to select the beam line that you are running on.
| Anchor | ||||
|---|---|---|---|---|
|
Web XAS is a browser-based interface for the XAS Data Collector on the beam line computer. Web XAS executes a queue of various item types (XAS experiments, time scans, motor moves, etc.) and provides the tools to edit the queue items as needed for the user's experiment.
If Web XAS freezes, is not behaving as expected, or is displaying a lot of errors, you can try following these directions to restart things: Restarting Web XAS
Setting Up An XAS ExperimentAnchor Setup Setup
Queue Setup
Using Web XAS, you can execute a series of items in queue. Queue items can be an experiment ("EXP") of various types (XAS, alignment scan, or time scan) or ICS commands ("ICS").
To define an XAS experiment, create a new EXP item using the + button in the Queue Manager section. Make sure EXP is selected in the Add Type select list. If you have existing experiment files, you can select one of those. If not, select Create New, enter a name for the item (this can be descriptive of the experiment and should contain no special characters), and press Add Item. Press Close when you are done adding items to the queue.
Select the experiment item in the Queue Manager item list. Under the Queue Manager is the Item Editor. In this section, you can define your XAS experiment by selecting a detector file, region file, and scan device.
- Type - Select XAS to define an XAS experiment. Other options include: TIME or ALIGN
- Detector - Detector files define what detector will be used and what data channels will be collected. Select a predefined detector file for transmission or fluorescence. If you have questions about which detector file is appropriate for your experiment, please ask beam line staff.
- Region - Region files define the scan energy, number of points in the scan, and count time per point. If you do not have a region file and want to learn how to set up a region file, click here: Define a Region
- Scan Device - the motor that will be moving, typically MONO, for an XAS experiment. (Exception: BL 2-2 uses MONOT1)
Define a RegionAnchor DefineRegion DefineRegion
To define a new region (or edit an existing one), click on the Regions box at the bottom of the Web XAS window. In the Region editor, press the New button to create an EXAFS region with basic defaults. There is also a Region Wizard available if you press the Wizard button. The wizard will allow you to enter more detailed information about your sample and experiment to generate a more customized region.
