canSAS - User contributions [en]

Al Ceramics

2021-07-12T11:00:19Z

Anna Sokolova:

==Experimental set-up==

Scattering from three samples have been collected in ToF mode at two resolutions (the hope was to check how many peaks we can resolve, comparing to SAXS (see [[Media:Alumina_seramics_SAXS.PDF|Alumina_seramics_SAXS.PDF]]) and then and combined ToF + monochromatic mode using two wavelengths.

Samples have been purchased from http://www.smartmembranes.de.

Mask1: Alumina membrane P65 D40

Mask2: Alumina membrane P480 D180

Mask3: Alumina membrane P125 D50

Each measurement took about 15min.
Data are reduced either on a narrow sector, or 2D averaged.
Mask1 suffers from multiple scattering even for 4.6A and 6A., Mask3 is ok for this wavelength range.

Pdf file with details showing multiple scattering, sample misalignment and hence anisotropy effects are in the file [[Media:sokolova_ceramic_masks_summary.pdf|sokolova_ceramic_masks_summary.pdf]].

==Experimental data: example==

The three graphs below are examples of non-matching scattering averaged in a slice of ~40deg width and the whole 2D averaged data for two different wavelengths. 4.6A is the shortest available wavelength on Bilby velocity selector (there is no option to rotate it, due to spatial constraints).
One can see there is no repeatability in this data. Alignment of pores inside the samples and massive multiple scattering is assumed to be the reasons.

It is obvious that these masks cannot be used as a standard for SANS measurements. The samples' thickness is very small (<0.5mm), samples are very brittle, it seems not feasible to try to adjust their shape.

[[File:Bilby Alumina ceramics measurements Mask 1.png |600px|test|middle|Aluminca ceramics Mask 1 SANS]]

[[File:Bilby Alumina ceramics measurements Mask 2.png |600px|test|middle|Aluminca ceramics Mask 2 SANS]]

[[File:Bilby Alumina ceramics measurements Mask 3.png |600px|test|middle|Aluminca ceramics Mask 3 SANS]]

Al Ceramics

2021-07-12T10:54:20Z

Anna Sokolova: Experimental details and results for the ceramic masks measured on Bilby SANS at ANSTO

==Experimental set-up==

Scattering from three samples have been collected in ToF mode at two resolutions (the hope was to check how many peaks we can resolve, comparing to SAXS (see [[Media:Alumina_seramics_SAXS.PDF|Alumina_seramics_SAXS.PDF]]) and then and combined ToF + monochromatic mode using two wavelengths.

Mask1: Alumina membrane P65 D40

Mask2: Alumina membrane P480 D180

Mask3: Alumina membrane P125 D50

Each measurement took about 15min.
Data are reduced either on a narrow sector, or 2D averaged.
Mask1 suffers from multiple scattering even for 4.6A and 6A., Mask3 is ok for this wavelength range.

Pdf file with details showing multiple scattering, sample misalignment and hence anisotropy effects are in the file [[Media:sokolova_ceramic_masks_summary.pdf|sokolova_ceramic_masks_summary.pdf]].

==Experimental data: example==

The three graphs below are examples of non-matching scattering averaged in a slice of ~40deg width and the whole 2D averaged data for two different wavelengths. 4.6A is the shortest available wavelength on Bilby velocity selector (there is no option to rotate it, due to spatial constraints).
One can see there is no repeatability in this data. Alignment of pores inside the samples and massive multiple scattering are assumed to be the reasons.

It is obvious that these masks cannot be used as a standard for SANS measurements. The samples' thickness is very small (<0.5mm), samples are very brittle, it seems not feasible to try to adjust their shape.

[[File:Bilby Alumina ceramics measurements Mask 1.png |600px|test|middle|Aluminca ceramics Mask 1 SANS]]

[[File:Bilby Alumina ceramics measurements Mask 2.png |600px|test|middle|Aluminca ceramics Mask 2 SANS]]

[[File:Bilby Alumina ceramics measurements Mask 3.png |600px|test|middle|Aluminca ceramics Mask 3 SANS]]

File:Alumina seramics SAXS.PDF

2021-07-12T10:46:48Z

Anna Sokolova: SAXS data from three Alumina ceramics masks collected by Dr Brian Pauw.

SAXS data from three Alumina ceramics masks collected by Dr Brian Pauw.

File:sokolova ceramic masks summary.pdf

2021-07-12T10:36:02Z

Anna Sokolova: This is a detailed report with scattering data from Alumina ceramics masks. Contains data from Bilby SANS instrument at ACNS, ANSTO.

This is a detailed report with scattering data from Alumina ceramics masks. Contains data from Bilby SANS instrument at ACNS, ANSTO.

File:Bilby Alumina ceramics measurements Mask 3.png

2021-07-12T00:48:21Z

Anna Sokolova: Mask2 P125 D50

Mask2 P125 D50

File:Bilby Alumina ceramics measurements Mask 2.png

2021-07-12T00:47:11Z

Anna Sokolova: Mask2 P480 D180

Mask2 P480 D180

File:Bilby Alumina ceramics measurements Mask 1.png

2021-07-12T00:46:18Z

Anna Sokolova: Mask1 P65 D40

Mask1 P65 D40

Reproducibility and Reliability Working Group

2021-05-05T06:37:22Z

Anna Sokolova: Edit Al ceramics paragraph.

==Reliability and Reproducibility==

The group considers the issues that relate to reliability of results from small-angle scattering experiments, both as regards measured data and the parameters derived from analysis of the data that describe the samples. It had been established originally under the name 'Standardization' but has been renamed to provide a better description of the activities.

Anybody that is interested is welcome to join the mail group associated with this topic. Past messages are available at:
https://groups.google.com/forum/#!forum/cansas-rrwg and there is a button marked 'Apply to join group'.

==Members==
* John Barker (NIST)
* Peter Boesecke (ESRF Contact)
* Rex Hjelm (LANSCE)
* Jan Ilavsky (APS)
* Peter Lindner (ILL)
* Marc Malfois (Alba)
* Adrian Rennie (Uppsala University - chair)

==News/Status==

*June 2017. There is discussion of new activities at the canSAS-IX meeting related Reproducibility and Reliability. http://www.cansas.org/wgwiki/index.php/Reliability
*August 2015. The mailing list is now on Google Groups [https://groups.google.com/forum/#!forum/cansas-rrwg https://groups.google.com/forum/#!forum/cansas-rrwg]. A summary of recent activities will be presented at the [[SAS_2015_Berlin |lunch time session]] at the SAS2015 meeting in Berlin on Monday, September 14, 2015.
*A short account of the discussion concerning this topic at the canSAS-VIII meeting from 14 to 16 April 2015 in Tokai is available:

[[Discussion_Group_B2]]

Plans are being made (April 2015) for further types of sample to be circulated for comparative measurements.

*Discussion at the workshop in Uppsala has been presented on a separate page:

[[2012 Standards Discussion|canSAS 2012 meeting discussions]]

*Work was presented at the SAS-2012 conference (www.sas2012.com). This includes a summary of standardization in the canSAS session and a presentation on the latex round robin measurements.

[[canSAS at the SAS-2012 Conference]]

==Glassy Carbon Round Robin==
Two samples of glassy carbons from Jan Ilavsky have been doing the rounds. They've been to NIST, ILL, ISIS, APS, ESRF and Diamond and ANSTO.

Details and data here : [[ Glassy Carbon Round Robin ]]

==Polystyrene Latex Round Robin==
Samples of a monodisperse polystyrene latex have recently been measured at ILL (D22 and D11), ANSTO (Quokka), ISIS (SANS2D) and at NCNR (NG7). Samples are also at Diamond awaiting measurement.
Details and data here : [[ Latex Round Robin ]]

A new series of samples designated J, K, L and that have slightly different dilution have been provided for measurements at APS, FRMII, SPRING-8 and ILL.

Results of measurements with some conclusions are described in a publication in Journal of Applied Crystallography:

A. R. Rennie, M. S. Hellsing, K. Wood, E. P. Gilbert, L. Porcar, R. Schweins, C. D. Dewhurst, P. Lindner, R. K. Heenan, S. E. Rogers, P. D. Butler, J. R. Krzywon, R. E. Ghosh, A. J. Jackson and M. Malfois 'Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex', Journal of Applied Crystallography, 46, (2013). doi: 10.1107/S0021889813019468 [http://dx.doi.org/10.1107/S0021889813019468].

==Al ceramics masks==
In 2019, during CanSAS workshop, we (Anna Sokolova [https://www.ansto.gov.au/people/dr-anna-sokolova] and Brian Pauw [https://lookingatnothing.com/]) have had a discussion on a potential standard for SAXS/SANS measurements.

Al ceramics samples (masks) have been purchased from Smart membranes [http://www.smartmembranes.de/].
This material (it is also called 'Alumina membranes') has been used as an example for the SAXS/USAXS instrument testing, see B. R. Pauw, A. J. Smith, T. Snow, O. Shebanova, J. P. Sutter, J. Ilavsky, D. Hermida-Merino, G. J. Smales, N. J. Terrill, A. F. Thunemann, and W. Bras 'Extending synchrotron SAXS instrument ranges through addition of a portable, inexpensive USAXSmodule with vertical rotation axes'. Journal of Synchrotron Radiation, 28, (2021). doi: 10.1107/S1600577521003313 [https://doi.org/10.1107/S1600577521003313].
The material was also used in the study by A. Yildirim, K. Sentker, G. J. Smales, B. R. Pauw, P. Huberb, and A. Schonhals 'Collective orientational order and phase behavior of a discotic liquid crystal under nanoscale confinement'. Nanoscale Advances, 1, (2019). doi: 10.1039/c8na00308 [https://doi.org/10.1039/c8na00308d].

SAXS data have been collected at ... and look promising, showing several peaks.

SANS data have been collected on Bilby instrument [https://www.ansto.gov.au/our-facilities/australian-centre-for-neutron-scattering/neutron-scattering-instruments/bilby-small], ANSTO, using time-of-flight settings.
Unfortunately, it appears that Al ceramics is not a good material to use because of asymmetry in the membrane and massive multiple scattering, visible even at 4.5A wavelength.
In any way, we found it useful to present Bilby data here, for future reference.

Details and data here : [[ Al Ceramics ]]

==Calibration Procedures==

We will try to gather summaries of the procedures used for calibration of small-angle scattering instruments. It has been suggested that summaries of information would benefit both users and those who run instruments and facilities. Everyone is encouraged to contribute to this work in progress. Procedures for laboratory instruments as well as synchrotron and neutron facilities are welcome.

Details are here : [[ Calibration Procedures ]]

[[Category:Working Groups]]

Reproducibility and Reliability Working Group

2021-04-27T07:06:46Z

Anna Sokolova: Added two references to the Alumina membane, aka Al ceramics, data. I think they are good references to the use of this material.

==Reliability and Reproducibility==

The group considers the issues that relate to reliability of results from small-angle scattering experiments, both as regards measured data and the parameters derived from analysis of the data that describe the samples. It had been established originally under the name 'Standardization' but has been renamed to provide a better description of the activities.

Anybody that is interested is welcome to join the mail group associated with this topic. Past messages are available at:
https://groups.google.com/forum/#!forum/cansas-rrwg and there is a button marked 'Apply to join group'.

==Members==
* John Barker (NIST)
* Peter Boesecke (ESRF Contact)
* Rex Hjelm (LANSCE)
* Jan Ilavsky (APS)
* Peter Lindner (ILL)
* Marc Malfois (Alba)
* Adrian Rennie (Uppsala University - chair)

==News/Status==

*June 2017. There is discussion of new activities at the canSAS-IX meeting related Reproducibility and Reliability. http://www.cansas.org/wgwiki/index.php/Reliability
*August 2015. The mailing list is now on Google Groups [https://groups.google.com/forum/#!forum/cansas-rrwg https://groups.google.com/forum/#!forum/cansas-rrwg]. A summary of recent activities will be presented at the [[SAS_2015_Berlin |lunch time session]] at the SAS2015 meeting in Berlin on Monday, September 14, 2015.
*A short account of the discussion concerning this topic at the canSAS-VIII meeting from 14 to 16 April 2015 in Tokai is available:

[[Discussion_Group_B2]]

Plans are being made (April 2015) for further types of sample to be circulated for comparative measurements.

*Discussion at the workshop in Uppsala has been presented on a separate page:

[[2012 Standards Discussion|canSAS 2012 meeting discussions]]

*Work was presented at the SAS-2012 conference (www.sas2012.com). This includes a summary of standardization in the canSAS session and a presentation on the latex round robin measurements.

[[canSAS at the SAS-2012 Conference]]

==Glassy Carbon Round Robin==
Two samples of glassy carbons from Jan Ilavsky have been doing the rounds. They've been to NIST, ILL, ISIS, APS, ESRF and Diamond and ANSTO.

Details and data here : [[ Glassy Carbon Round Robin ]]

==Polystyrene Latex Round Robin==
Samples of a monodisperse polystyrene latex have recently been measured at ILL (D22 and D11), ANSTO (Quokka), ISIS (SANS2D) and at NCNR (NG7). Samples are also at Diamond awaiting measurement.
Details and data here : [[ Latex Round Robin ]]

A new series of samples designated J, K, L and that have slightly different dilution have been provided for measurements at APS, FRMII, SPRING-8 and ILL.

Results of measurements with some conclusions are described in a publication in Journal of Applied Crystallography:

A. R. Rennie, M. S. Hellsing, K. Wood, E. P. Gilbert, L. Porcar, R. Schweins, C. D. Dewhurst, P. Lindner, R. K. Heenan, S. E. Rogers, P. D. Butler, J. R. Krzywon, R. E. Ghosh, A. J. Jackson and M. Malfois 'Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex', Journal of Applied Crystallography, 46, (2013). doi: 10.1107/S0021889813019468 [http://dx.doi.org/10.1107/S0021889813019468].

==Al ceramics masks==
In 2019, during CanSAS workshop, we (Anna Sokolova and Brian Pauw) have had a discussion on a potential standard for SAXS/SANS measurements.

Al ceramics samples (masks) are purchased from here: [http://www.smartmembranes.de/]
This material (it is also called, Alumina membrane) has been used as an example for the SAXS/USAXS instrument testing, see B. R. Pauw, A. J. Smith, T. Snow, O. Shebanova, J. P. Sutter, J. Ilavsky, D. Hermida-Merino, G. J. Smales, N. J. Terrill, A. F. Thunemann, and W. Bras 'Extending synchrotron SAXS instrument ranges through addition of a portable, inexpensive USAXSmodule with vertical rotation axes'. Journal of Synchrotron Radiation, 28, (2021). doi: 10.1107/S1600577521003313 [https://doi.org/10.1107/S1600577521003313].
The material was also used in the study by A. Yildirim, K. Sentker, G. J. Smales, B. R. Pauw, P. Huberb, and A. Schonhals 'Collective orientational order and phase behavior of a discotic liquid crystal under nanoscale confinement'. Nanoscale Advances, 1, (2019). doi: 10.1039/c8na00308 [https://doi.org/10.1039/c8na00308d].

SAXS data have been collected at ... and look promising, showing several peaks.

SANS data have been collected on Bilby instrument [https://www.ansto.gov.au/our-facilities/australian-centre-for-neutron-scattering/neutron-scattering-instruments/bilby-small], ANSTO, using time-of-flight settings.
Unfortunately, it appears that Al Ceramics is not a good material to use because of asymmetry in the membrane and massive multiple scattering, visible even at 4.5A wavelength.
In any way, we found it useful to present the data here, for future reference.

Details and data here : [[ Al Ceramics ]]

==Calibration Procedures==

We will try to gather summaries of the procedures used for calibration of small-angle scattering instruments. It has been suggested that summaries of information would benefit both users and those who run instruments and facilities. Everyone is encouraged to contribute to this work in progress. Procedures for laboratory instruments as well as synchrotron and neutron facilities are welcome.

Details are here : [[ Calibration Procedures ]]

[[Category:Working Groups]]

Reproducibility and Reliability Working Group

2021-04-26T06:47:27Z

Anna Sokolova: Started a paragraph about Al ceramics data. Learning formatting.

==Reliability and Reproducibility==

The group considers the issues that relate to reliability of results from small-angle scattering experiments, both as regards measured data and the parameters derived from analysis of the data that describe the samples. It had been established originally under the name 'Standardization' but has been renamed to provide a better description of the activities.

Anybody that is interested is welcome to join the mail group associated with this topic. Past messages are available at:
https://groups.google.com/forum/#!forum/cansas-rrwg and there is a button marked 'Apply to join group'.

==Members==
* John Barker (NIST)
* Peter Boesecke (ESRF Contact)
* Rex Hjelm (LANSCE)
* Jan Ilavsky (APS)
* Peter Lindner (ILL)
* Marc Malfois (Alba)
* Adrian Rennie (Uppsala University - chair)

==News/Status==

*June 2017. There is discussion of new activities at the canSAS-IX meeting related Reproducibility and Reliability. http://www.cansas.org/wgwiki/index.php/Reliability
*August 2015. The mailing list is now on Google Groups [https://groups.google.com/forum/#!forum/cansas-rrwg https://groups.google.com/forum/#!forum/cansas-rrwg]. A summary of recent activities will be presented at the [[SAS_2015_Berlin |lunch time session]] at the SAS2015 meeting in Berlin on Monday, September 14, 2015.
*A short account of the discussion concerning this topic at the canSAS-VIII meeting from 14 to 16 April 2015 in Tokai is available:

[[Discussion_Group_B2]]

Plans are being made (April 2015) for further types of sample to be circulated for comparative measurements.

*Discussion at the workshop in Uppsala has been presented on a separate page:

[[2012 Standards Discussion|canSAS 2012 meeting discussions]]

*Work was presented at the SAS-2012 conference (www.sas2012.com). This includes a summary of standardization in the canSAS session and a presentation on the latex round robin measurements.

[[canSAS at the SAS-2012 Conference]]

==Glassy Carbon Round Robin==
Two samples of glassy carbons from Jan Ilavsky have been doing the rounds. They've been to NIST, ILL, ISIS, APS, ESRF and Diamond and ANSTO.

Details and data here : [[ Glassy Carbon Round Robin ]]

==Polystyrene Latex Round Robin==
Samples of a monodisperse polystyrene latex have recently been measured at ILL (D22 and D11), ANSTO (Quokka), ISIS (SANS2D) and at NCNR (NG7). Samples are also at Diamond awaiting measurement.
Details and data here : [[ Latex Round Robin ]]

A new series of samples designated J, K, L and that have slightly different dilution have been provided for measurements at APS, FRMII, SPRING-8 and ILL.

Results of measurements with some conclusions are described in a publication in Journal of Applied Crystallography:

A. R. Rennie, M. S. Hellsing, K. Wood, E. P. Gilbert, L. Porcar, R. Schweins, C. D. Dewhurst, P. Lindner, R. K. Heenan, S. E. Rogers, P. D. Butler, J. R. Krzywon, R. E. Ghosh, A. J. Jackson and M. Malfois 'Learning about SANS instruments and data reduction from round robin measurements on samples of polystyrene latex', Journal of Applied Crystallography, 46, (2013). doi: 10.1107/S0021889813019468 [http://dx.doi.org/10.1107/S0021889813019468].

==Al ceramics masks==
In 2019, during CanSAS workshop, we (Anna Sokolova and Brian Pauw) have had a discussion on a potential standard for SAXS/SANS measurements.

Al ceramics samples (masks) are purchased from here: [http://www.smartmembranes.de/]

SAXS data have been collected at ... and look promising, showing several peaks.
SANS data have been collected on Bilby instrument [https://www.ansto.gov.au/our-facilities/australian-centre-for-neutron-scattering/neutron-scattering-instruments/bilby-small], ANSTO, using time-of-flight settings.
Unfortunately, it appears that Al Ceramics is not a good material to use because of asymmetry in the membrane and massive multiple scattering, visible even at 4.5A wavelength.
In any way, we found it useful to present the data here, for future reference.

Details and data here : [[ Al Ceramics ]]

==Calibration Procedures==

We will try to gather summaries of the procedures used for calibration of small-angle scattering instruments. It has been suggested that summaries of information would benefit both users and those who run instruments and facilities. Everyone is encouraged to contribute to this work in progress. Procedures for laboratory instruments as well as synchrotron and neutron facilities are welcome.

Details are here : [[ Calibration Procedures ]]

[[Category:Working Groups]]