XPCS Analysis 8-ID

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This Wiki page is dedicated towards providing documentation on 8-ID XPCS Data Analysis and Visualization

Overview

The sections below provide description of Visualization of XPCS results followed by the Data Reduction/Analysis of Raw Data to yield Correlation functions.

XPCS metadata and results are primarily saved into a HDF5 file format based on a Data Exchange format defined at the APS.

MetaData File

The concept is as follows: There are groups in the HDF5 file that are part of the Data Acquisition and these are categorized into the following: /measurement

/measurement/instrument /measurement/instrument/acquisition/

/measurement/instrument/detector/ /measurement/instrument/detector/roi/ /measurement/instrument/detector/kinetics/

/measurement/instrument/source_begin/

/measurement/sample/

The above groups each contain several HDF5 datasets or parameters which have a scalar, vector, ND arrays or string attributes. The above are present in every metadata HDF5 file associated with each data acquisition. This file is saved in the same directory/folder as the raw detector images file itself.

Analysis Parameters

When a data set is processed which primarily means some sort of a correlation analysis, then the parameters that are needed to analyze the data such as:

  • user defined mask
  • wave vector maps (called as qmaps) where each wave vector or an azimuthal angle is characterized by a unique integer in what is called as a digitized map
  • look up table that links the integers in the qmaps to the q/phi values
  • Start and end frame numbers to be processed which could be a subset of the frames collected
  • More intricate analysis parameters such as the multitau delay level, striding and averaging frames prior to correlation

Section 2

Section 3
Section 4
  1. dadga
  2. agdga
  3. test
  4. help


Beamline Summary
Date Start Time Duration Task Status
12/7 1:00 PM 1 Day cadmus DONE
12/14 1:00 PM 1 Day echo DONE
12/21 1:00 PM 1 Day overhead comfort displays DONE
12/22 1:00 PM 1 Day demeter DONE
1/3 1:00 PM 1 Day phoenix DONE
Run 2017-1 (or April/May shutdown) TBD TBD other MCR systems as approved by AOP DONE


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