IGOR Pro Developers Working Group
Members
- Jan Ilavsky (APS)
- Andrew Jackson (NIST)
- Steve Kline (NIST)
- Ken Littrell (ORNL)
- Andy Nelson (ANSTO) (chair)
News/Status
USAXS (= "Indra2") data naming structure Introduction: APS USAXS instrument can operate with either slit smeared and 2-D collimated geometry. Generally all intensity data are absolutely calibrated ([1/cm]) and errors are estimated. Q units are 1/A. Significant fraction of samples exhibit multiple scattering effects for which we attempt to make correction for absolute intensity calibration. Most of data processing parameters are stored in keyword list in the wave note. List of wave names and description: SMR_Int, SMR_Error, SMR_Qvec slit smeared Intensity, Error, and Q. Slit length is in the wave note M_SMR_Int, M_SMR_Error, M_SMR_Qvec slit smeared data, absolute intensity corrected for multiple scattering effects DSM_Int, DSM_Error, DSM_Qvec de-smeared (using Lake method) or 2-D collimated data M_DSM_Int, M_DSM_Error, M_DSM_Qvec de-smeared or 2-D collimated data, absolute intensity corrected for multiple scattering effects
Nika data naming structure Introduction: Nika is generic package for reduction of 2D data into 1D "lineouts" for Igor Pro. It is used mostly for X-ray SAXS and WAXS instruments. It can output data either as function of Q, angle or d-spacing. It can generate either maximum number of Q points (one Q per pixle on detector) or re bin the points to smaller number, or re bin the points to semi-logarithmic distribution in Q. To identify the sector parameters (or circular average), "_ending" is attached to the end of output wave names: "_C" circular average "_Angle_HalfWidth" sector average around direction of Angle with sector +/- HalfWidth example: "_10_5" average around 10 degrees direction with sector 10 degrees (+/- 5 degrees) wide. Or to use another description - sector between lines in 5 degrees and 15 degrees azimuth on the detector. List of data types "QRS" namings structure: q_sampleName_ending Q with units in [1/A] r_sampleName_ending Intensity with units 1/cm (if data are calibrated) s_sampleName_ending Error for intensity (statistical error from averaged pixels) w_sampleName_ending Q bin width optionally instead of Q one can use: t_sampleName_ending Two theta value in degrees d_samplename_ending d-spacing value in A
