t = 1/μ , where is the thickness at which the incident intensity is reduced μ by 1/e. To perform measurements on an absolute scale the thickness of the sample must be known. In Measurement Details, type in the sample thickness in centimeters. Check boxes for + I0” and mask” “Transmission “BS The volume normalized differential scattering cross section is calculated by, , where is the volume of the sample, is the scattered intensity, is the V I(q) B(q) background intensity, is the intensity in the forward scattering direction, is I0 T transmission factor, is thickness of the sample and is the collection solid angle. t (ΔΩ) By collecting data as a function of the differential scattering cross section, one can quantify certain values (number density of scatterers, molecular weight, volume fraction, specific surface area, surface-to-volume ratio, volume weighted or number weighted mean size). Note down Image number and click Measure button. IV. Writing and Running an automated measurement macro This section covers making a macro to automate the data collection at multiple sample positions, detector configurations and, when enabled, will display scattering data on an absolute scale. The y-axis is differential scattering cross section in units of cm-1 and the x-axis is photon momentum transfer, q, in Å-1. Open the right panel for the macro editor with the button. “>” Notice: When clicking on any buttion in the GICC, the action is not performed but instead, written into the macro list. At the top of the macro editor, click the button “New” Move to the sample of interest in position (Z,Y) by clicking on it in the Current Holder panel. Click Sample to Beam button. In Measurement Details, select a measurement Add a description including: sample name, exposure time, hole position, sample thickness Choose a measurement time in seconds. Measure button. Repeat for all samples in holder. Save macros written in the GICC panel with the .gicc extension. If you’d like to insert an instruction in a macro ahead of another without deleting all of the instructions, right click on the instruction and select The instruction clicked before”. “Insert has an anchor icon next to it. Perform mouse clicks on GICC to insert intended action. When done adding actions, right click and insert before” “Disable
t = 1/μ , where μ is the thickness at which the incident intensity is reduced by 1/e. To perform measurements on an absolute scale the thickness of the sample must be known. In Measurement Details, type in the sample thickness in centimeters. Check boxes for “Transmission + I0” and “BS mask” The volume normalized differential scattering cross section is calculated by, , where V is the volume of the sample, I(q) is the scattered intensity, B(q) is the background intensity, I0 is the intensity in the forward scattering direction, T is transmission factor, t is thickness of the sample and (ΔΩ) is the collection solid angle. By collecting data as a function of the differential scattering cross section, one can quantify certain values (number density of scatterers, molecular weight, volume fraction, specific surface area, surface-to-volume ratio, volume weighted or number weighted mean size). Note down Image number and click Measure button. IV. Writing and Running an automated measurement macro This section covers making a macro to automate the data collection at multiple sample positions, detector configurations and, when enabled, will display scattering data on an absolute scale. The y-axis is differential scattering cross section in units of cm-1 and the x-axis is photon momentum transfer, q, in Å-1. Open the right panel for the macro editor with the “>” button. Notice: When clicking on any buttion in the GICC, the action is not performed but instead, written into the macro list. At the top of the macro editor, click the “New” button Move to the sample of interest in position (Z,Y) by clicking on it in the Current Holder panel. Click Sample to Beam button. In Measurement Details, select a measurement Add a description including: sample name, exposure time, hole position, sample thickness Choose a measurement time in seconds. Measure button. Repeat for all samples in holder. Save macros written in the GICC panel with the .gicc extension. If you’d like to insert an instruction in a macro ahead of another without deleting all of the instructions, right click on the instruction and select “Insert before”. The instruction clicked has an anchor icon next to it. Perform mouse clicks on GICC to insert intended action. When done adding actions, right click and “Disable insert before”
TransmissionSAXSSOP.docx