From canSAS
Revision as of 07:40, 1 June 2012 by Ajj (talk | contribs)

Meeting of canSAS working groups


Work on specific matters important to the canSAS community as decided in previous conference calls. It is expected that those attending this working session will already have strong foundation and understanding and will come ready with knowledge, tools, and ideas to make significant progress during the event. The specific projects and tasks, as well as the list of participants, are described on this wiki and will be revised as the event draws near.

The three main themes are:

  • Treated data format - developing a standard for multidimensional treated data and resolving issues that arise with the 1-d standard and its implementaion.
  • Standardisation - intercomparison of measurements and software for data reduction and analysis so as to assess experimental and intstrumental reliability
  • Development of a Global SAS web portal. This should be a general point of entry for the community to find information about small-angle scattering.

This page provides discussion of the themes, preliminary work and ideas : 2012 Discussion


  • 2-d data format
  • A plan for standards
  • Global SAS Web Portal
  • presentation at SAS2012


  • 2012 July 28 - 31 (Saturday - Tuesday, inclusive)

Meeting Location

Uppsala University
Building: Angstrom Laboratory [1]
Room(s): TBA


  • arrive the previous day (Friday, 2012-07-27)
  • conference check-in first morning (Saturday, 2012-07-28), location TBA
  • meet all day (Sunday, 2012-07-29), location TBA
  • meet all day (Monday, 2012-07-30), location TBA
  • meet all day (Tuesday, 2012-07-31), location TBA
  • checkout next day (Wednesday, 2012-08-01)

Daily Agenda

Meeting room is TBA

Here is the daily schedule (tentative):

time description comments
8:45 - 10:00 AM plenary previous day's report and question
10:15 - 12:30 PM morning session work in groups
12:30 - 2:00 PM lunch TBA
2:00 - 4:30 PM afternoon session work in groups
4:30 - 4:45 PM plenary tea, coffee
4:45 - 6:30 PM plenary reports and discussions
6:30 - 8:00 PM dinner TBA
8:00 PM - ? evening discussions ad hoc


Business Matters

  • Re-enunciate purpose and benefits of a standard reduced data format
    • 1D Format
    • agree a proposed foreign namespace extension of the current 1D standard (required to enable, for example, t-o-f instruments to store auxillary wavelength-dependent non-I(Q) data in the same output files)
    • agree resultant changes to the schema/stylesheet
   ARJN - I would recommend that during this meeting that the current format then be 'parked', the new 2D format
          should be flexible enough to handle 1D and 2D data
    • 2D Format
    • define minimum necessary for reduced data
      • review previous discussions on 2D
      • considerations specific to 2D reduced data
      • consider forward looking issues such as
        • grazing incidence
        • event mode analysis
    • suggest format framework (NeXus extension, canSAS 1D extension, other) with brief discussion of the reason for the choice (including options considered, pros and cons of each, and final weighing)
    • Guide to how to make implementation easy.
    • Create straw format suitable for test/demonstration use and convert some test data for such a demonstration.
    • Provide a plan for presentation at SAS 2012
  • Standards
    • Purpose and goals: Intercomparison of data measured on the same sample with different instruments and different techniques (SAXS, SANS, light scattering etc.) can prove valuable in a number of ways. In particular it aids understanding of details of the experimental methods and it can help assess reliability. In a similar way, looking at results of data reduction or analysis generated with different software can provide valuable information about performance and verification of methodology. Specifically these activities should:
      • Provide Quality Assurance/Quality Control,
      • Improve (reduce) uncertainties of SAS measurements in general,
      • Help each facility continuously improve performance and quality of data.
    • We will discuss what types of tests are interesting/important:
      • Beam intensity standards - there are several different ways to quantify this
      • Standards to test resolution
      • Absolute intensity calibrations,
      • Materials for Q calibration,
      • etc. etc,
    • Some other related issues:
      • Inelastic,
      • Multiple scattering,
      • Wavelength contamination,
      • Detector efficiencies at different wavelengths
      • limits in signal to noise - how weak a signal can be reliable extracted;
      • etc.
    • Outcomes needed are:
      • A written plan to sustain long term effort in this area
      • This should describe how to seed, co-ordinate and publicise “ad-hoc” projects ,
      • Assess how frequently exercises can be undertakem
      • Define good ways to disseminate/share results. This will including “advertising” projects and using them as input for other activities.
    • We should aim to define a list of 2 or 3 projects for work in the near term. This should include a plan of action and participants for each.
    • We shoud have a plan for presentation at SAS 2012. (This might just be an announcement of the plan and see who wants to participate?.)
  • Global SAS Web Portal
    • define scope, purpose, and goal of portal
    • list content type to which such a portal should give access.
    • Suggest method for hosting
      • ?more distributed or more centralized,
      • ?under auspices of a particular facility or SAS commission
      • ? .. or both etc)
    • Build a working straw landing page prototype
    • Build at least 2 or 3 subpages and/or designs on paper
    • plan for presentations
      • SAS 2012
      • SAS commission

Projects and Tasks

These items are sorted in order of priority that they be finished.

  1. 2-D format
  2. Standardization
  3. SAS web portal
  4. ...


  1. the canSAS 1D, lessons learned
  2. ...

Practical Matters


Please inform Adrian Rennie of your intention to particpate and send details of your arrival and departure dates. You should book the accommodation directly with the hotel - see below.


Clarion Hotel Gillet, Uppsala
Dragarbrunnsgatan 23,
753 20 Uppsala, Sweden

  • Expect hotel rate to be 570 SEK for 1 Single Bed (approximate, subject to change)
    • Please reserve your own rooms directly with the hotel (website, phone, ...)

Please reserve your own rooms directly with the hotel:

Web site
+46 (0) 18 68 18 00
+46 (0) 18 68 18 18
map reference

Directions and Maps


  • Adrian Rennie
    • institute: Uppsala University
    • email:
    • office phone: +46184713596


  • Conference fee: no fee
  • regular meals (breakfast, lunch, dinner) will be traveler's expense


item quantity who provides?
projector & screen   host
LCD displays, keyboards, & mice   host
electrical power extension cords   host
foreign electrical power adapter as needed traveler
Wi-Fi connections sufficient host venue


participant affiliation arriving departing registration? other
Adrian Rennie Uppsala University host host host  
Paul Butler NIST 2012-07-27 2012-08-01 Yes  
Andrew Jackson ESS 2012-07-27 2012-08-01 Yes  
Pete Jemian APS 2012-07-27 2012-08-01 Yes  
Steve King ISIS 2012-07-27 2012-08-01 tba  
Tobias Richter Diamond Light Source tba tba Yes  
Lionel Porcar Institut Laue Langevin tba tba Yes  

Final Report