Choose Scan” from the List programs of type: drop-down menu and “Absolute then click OK In the window, specify the Configuration from the Prepare Absolute Scan menu. You will usually select Changer”. “Sample Click on the button. The Settings button is in the upper right corner of the Prepare Absolute Scan window in the window, scroll down until you can select in Detector Program Settings the Diffracted beam path Once you select Detector, an information field will appear in the bottom of the window Program Settings In the drop-down menu, shown below, change the value for Detector from VI.2 to “Actual” “X’Celerator[2]” Specify for parameters for the X’Celerator Detector Set Scan mode to “Scanning” Set Active Length (°2Theta) to “2.122” As discussed above in step I.7.b.x.3 (pg 8), this value could be as small as 0.518 if needed Click OK In the window, specify the Scan Axis Prepare Absolute Scan scans are the conventional Bragg-Brentano parafocusing condition, “Gonio” where omega is always ½ 2Theta. This is the most common Scan Axis. is used when collecting data from a film on a single crystal “2Theta-Omega” substrate. 2Theta and are varied so that Omega = ½ 2Theta + offset. Set Offset(°) to any nonzero value between 5 and -5 to reduce or eliminate the strong intensity from the substrate peak. An Offset(°) value of is the most common. “1” Set the Scan Properties The Scan Mode is always “Continuous” Specify the Start angle(°), End angle(°), and Step size(°) The typical Step size is “0.0167113”. For the angle, End angle, and Step size, the actual value used may differ slightly from what you enter- depending on physical constraints of the detector Specify the scan rate You can either enter a value for Time per step (s) or Scan speed (°/s). The other value and the Total time will be recalculated accordingly.
Choose “Absolute Scan” from the List programs of type: drop-down menu and then click OK In the Prepare Absolute Scan window, specify the Configuration from the menu. You will usually select “Sample Changer”. Click on the button. The Settings button is in the upper right corner of the Prepare Absolute Scan window in the Program Settings window, scroll down until you can select Detector in the Diffracted beam path Once you select Detector, an information field will appear in the bottom of the Program Settings window In the drop-down menu, shown below, change the value for Detector from “Actual” to “X’Celerator[2]” Specify for parameters for the X’Celerator Detector Set Scan mode to “Scanning” Set Active Length (°2Theta) to “2.122” As discussed above in step I.7.b.x.3 (pg 8), this value could be as small as 0.518 if needed Click OK In the Prepare Absolute Scan window, specify the Scan Axis “Gonio” scans are the conventional Bragg-Brentano parafocusing condition, where omega is always ½ 2Theta. This is the most common Scan Axis. “2Theta-Omega” is used when collecting data from a film on a single crystal substrate. 2Theta and are varied so that Omega = ½ 2Theta + offset. Set Offset(°) to any nonzero value between 5 and -5 to reduce or eliminate the strong intensity from the substrate peak. An Offset(°) value of “1” is the most common. Set the Scan Properties The Scan Mode is always “Continuous” Specify the Start angle(°), End angle(°), and Step size(°) The typical Step size is “0.0167113”. For the angle, End angle, and Step size, the actual value used may differ slightly from what you enter- depending on physical constraints of the detector Specify the scan rate You can either enter a value for Time per step (s) or Scan speed (°/s). The other value and the Total time will be recalculated accordingly. VI.2
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