/GISANS Data Reduction and Analysis Upgrades Initiative - Revision history

Annikastellhorn at 13:47, 6 April 2026

2026-04-06T13:47:15Z

← Older revision		Revision as of 13:47, 6 April 2026
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	A first workshop with the international GISA(X/N)S community has been hold in Grenoble on the 17th-18th of March 2026 in hybrid mode. The workshop overview, discussion points, presentation slides, and a summary can be found here:		A first workshop with the international GISA(X/N)S community has been hold in Grenoble on the 17th-18th of March 2026 in hybrid mode. The workshop overview, discussion points, presentation slides, and a summary can be found here:
	[[/GISANS - Advancing data reduction and analysis Workshop #1" 2026-03-17/18]]		[[/GISANS - Advancing data reduction and analysis Workshop #1" 2026-03-17/18]]

	~~[[File:GISANS Programme FINAL.jpg\|thumb\|Workshop programme]]~~
	~~==== Discussion session notes ====~~



	~~'''POINT A. ToF-GISANS'''<br />~~
	* Presentation slides: To come
	* Further Notes from the ILL-Workshop on: [[/ToF-GISANS]]

	~~'''POINT B. Multiple scattering'''<br />~~
	* Presentation slides:
	~~[[File:HF_MuSc GISANS.pdf\|thumb]]~~
	* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]

	~~'''POINT C. Background handling'''<br />~~
	* Presentation slides:
	~~[[File:Background ideas.pdf\|thumb]]~~
	* Further Notes from the ILL-Workshop on: [[/Background handling]]

	~~'''POINT D. Normalization''' <br />~~
	* Presentation slides:
	~~[[File:GISANS-NormalizationDiscussionStarters.pdf\|thumb\|Introduction to Normalization - Sebastian Jaksch]]~~
	* Further Notes from the ILL-Workshop on: [[/Normalization]]

	~~'''POINT E. Using SANS software''' <br />~~
	* No introduction talk
	* Further Notes from the ILL-Workshop on: [[/Using SANS software]]

	~~'''POINT F / Instrumentation & Q/lambda resolution'''<br />~~
	* Presentation slides:
	~~[[File:2026 03 CANSAS Grenoble Resol Fn JFMoulin.pdf\|thumb\|Introduction to ToF Resolution aspects - Jean-Francois Moulin]]~~
	~~[[File:TopervergGISANS2026ILL1-part1.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 1]]~~
	~~[[File:TopervergGISANS2026ILL1-part2.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 2]]~~
	* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]

	~~'''POINT G. Need good documentation'''<br />~~
	* No Introduction talk
	* Further Notes from the ILL-Workshop on: [[/Documentation]]

	~~'''POINT H. Integration of McStas with BornAgain'''<br />~~
	* Presentation slides:
	~~[[File:HF McStas.pdf\|thumb\|Introduction on McStas - Henrich Frielinghaus]]~~
	* Further Notes from the ILL-Workshop on: [[/McStas]]

	~~'''POINT I. Get a common data format for GISANS data reduction:'''<br />~~
	* Presentation slides:
	~~[[File:GISANS 2026 File Formats - Brian Maranville.pdf\|thumb\|Introduction on File Formats - Brian Maranville]]~~
	* Further Notes from the ILL-Workshop on: [[/Common Data Format]]


	~~'''POINT J. Computer simulations / AI support:'''<br />~~
	* No Introduction talk
	* Further Notes from the ILL-Workshop on: [[/Computer simulations / AI support]]

	~~'''POINT K. Off-specular scattering:'''<br />~~
	* Presentation slides:
	~~[[File:Gutfreund OffSpec new part 1.pdf\|thumb\|Talk on "Offspecular Scattering" from Philipp Gutfreund - Part 1]]~~
	~~[[File:Gutfreund OffSpec new part 2.pdf\|thumb\|Talk on "Offspecular Scattering" from Philipp Gutfreund - Part 2]]~~
	* Further Notes from the ILL-Workshop on: [[/Off-Specular Scattering]]

	~~'''POINT L. Magnetic Scattering:'''<br />~~
	* Presentation slides:
	~~[[File:Magnetic GISANS.pdf\|thumb\|Talk on "Magnetic and PA-GISANS" from Annika Stellhorn]]~~
	* Further Notes from the ILL-Workshop on: [[/Notes Magnetic Scattering]]

	~~'''POINT M. Data Reduction:'''<br />~~
	* Presentation slides:
	~~[[File:2026 03 CANSAS Grenoble Data Reduction TOF JFMoulin.pdf\|thumb\|Introduction to ToF Data Reduction - Jean-Francois Moulin]]~~
	* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]

	~~==== Organizational notes ====~~

	~~==== Summary ====~~
	* Instrument factors influence measurement strategies and tools are needed to aid this process.

	* Background - effects of inelastic scattering can change background.

	* Resolution is important both as regards wavelength and angle. The latter depends on collimation as well as footprint on the sample and spatial resolution of the detector. Full interpretation of data is likely to require extensive information to be available with processed data.

	* Data reduction from raw data will require establishment of appropriate data formats for input to existing modelling and analysis software. The software may also need development to fully exploit the information that is available.

	* Reflection and refraction should be excluded from multiple scattering
	* Need to agree on a common nomenclature
	* There are certain constraints for multiple scattering: mean free path length & coherence length, sample size / curvature / geometry

	* Background subtraction is dependent on:
	** sample system/geometry/the observable physics.
	* Each system has to be treated in a different way.
	* A survey will help identifying the necessary / common steps among the community for specific classified systems.
	* In case of multiple scattering: Include McStas as standard for GISANS analysis?

	* Full quantitative normalization procedure:
	** measuring GISANS together with NR & Off-specular scattering, to view the whole Q-space.
	* If this is not feasible:
	** Same as topic "Background": each system has to be classified for its way "how to be treated" - Survey needed!
	* General aspects (sample independent):
	** Precise I(lambda) normalization of the beamlines has to be performed

	~~==== Outlook ====~~
	* Letter in "Neutron News"

Annikastellhorn at 13:45, 6 April 2026

2026-04-06T13:45:51Z

← Older revision		Revision as of 13:45, 6 April 2026
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	** different backgrounds for different lambda/incident angles which is additionally dominated by multiple scattering		** different backgrounds for different lambda/incident angles which is additionally dominated by multiple scattering
	* Need to differentiate between: (i) incoherent multiple scattering, (ii) multiple scattering for which Born approximation breaks down		* Need to differentiate between: (i) incoherent multiple scattering, (ii) multiple scattering for which Born approximation breaks down
	* Further Notes from the ILL-Workshop on: [[/ToF-GISANS]]
	* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]

	'''POINT C. Background handling'''<br />		'''POINT C. Background handling'''<br />
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	* Existing user scripts that have proven to work, can be implemented into BA		* Existing user scripts that have proven to work, can be implemented into BA
	* Influence from hydrogen?		* Influence from hydrogen?
	* Further Notes from the ILL-Workshop on: [[/Background handling]]

	'''POINT D. Normalization''' <br />		'''POINT D. Normalization''' <br />
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	* In GISAS, not clear consensus as to how data are reported		* In GISAS, not clear consensus as to how data are reported
	* Correct background substraction and its impact on normalization and absolute intensity calculation has to be taken care of		* Correct background substraction and its impact on normalization and absolute intensity calculation has to be taken care of
	* Further Notes from the ILL-Workshop on: [[/Normalization]]

	'''POINT E. Using SANS software''' <br />		'''POINT E. Using SANS software''' <br />
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	** Needs to be compatible to existing software like GRASP or MANTID		** Needs to be compatible to existing software like GRASP or MANTID
	** Key: well-defined .nxs (canSAS) standard		** Key: well-defined .nxs (canSAS) standard
	* Further Notes from the ILL-Workshop on: [[/Using SANS software]]

	'''POINT F / Instrumentation & Q/lambda resolution (different detector arrays, or, sample geometries-how is data reduced)'''<br />		'''POINT F / Instrumentation & Q/lambda resolution (different detector arrays, or, sample geometries-how is data reduced)'''<br />
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	* To be contributed via “requests”/”patches” to the documentation sources.		* To be contributed via “requests”/”patches” to the documentation sources.
	* Further Notes from the ILL-Workshop on: [[/Documentation]]

	'''POINT H. Integration of McStas with BornAgain'''<br />		'''POINT H. Integration of McStas with BornAgain'''<br />
	* Feedback-loops available (from Artur) between McStas and BornAgain, but no fitting possible		* Feedback-loops available (from Artur) between McStas and BornAgain, but no fitting possible
	* Further Notes from the ILL-Workshop on: [[/McStas]]

	'''POINT I. Get a common data format for GISANS data reduction:'''<br />		'''POINT I. Get a common data format for GISANS data reduction:'''<br />
	* Making use of canSAS and ORSO standards		* Making use of canSAS and ORSO standards
	* Need to extend both the canSAS/ORSO formats towards GISAS		* Need to extend both the canSAS/ORSO formats towards GISAS
	* Further Notes from the ILL-Workshop on: [[/Common Data Format]]


	~~'''POINT J. Computer simulations / AI support:'''<br />~~

	* Further Notes from the ILL-Workshop on: [[/Computer simulations / AI support]]

	~~'''POINT K. Off-specular scattering:'''<br />~~

	* Further Notes from the ILL-Workshop on: [[/Off-Specular Scattering]]

	~~'''POINT L. Magnetic Scattering:'''<br />~~

	* Further Notes from the ILL-Workshop on: [[/Notes Magnetic Scattering]]

	~~'''POINT M. Data Reduction:'''<br />~~

	* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]

	====“How-to”====		====“How-to”====
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	=== First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18 ===		=== First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18 ===

			A first workshop with the international GISA(X/N)S community has been hold in Grenoble on the 17th-18th of March 2026 in hybrid mode. The workshop overview, discussion points, presentation slides, and a summary can be found here:
			[[/GISANS - Advancing data reduction and analysis Workshop #1" 2026-03-17/18]]

	[[File:GISANS Programme FINAL.jpg\|thumb\|Workshop programme]]		[[File:GISANS Programme FINAL.jpg\|thumb\|Workshop programme]]
	==== Discussion session notes ====		==== Discussion session notes ====



	'''POINT A. ToF-GISANS'''<br />		'''POINT A. ToF-GISANS'''<br />
	* Presentation slides:		* Presentation slides: To come
	* Further Notes from the ILL-Workshop on: [[/ToF-GISANS]]		* Further Notes from the ILL-Workshop on: [[/ToF-GISANS]]

Annikastellhorn at 13:41, 6 April 2026

2026-04-06T13:41:09Z

← Older revision		Revision as of 13:41, 6 April 2026
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	[[File:TopervergGISANS2026ILL1-part1.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 1]]		[[File:TopervergGISANS2026ILL1-part1.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 1]]
	[[File:TopervergGISANS2026ILL1-part2.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 2]]		[[File:TopervergGISANS2026ILL1-part2.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 2]]
	* Add slides from Boris Toperverg: check what to do when file too big
	* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]		* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]

Annikastellhorn at 13:38, 6 April 2026

2026-04-06T13:38:24Z

← Older revision		Revision as of 13:38, 6 April 2026
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	* Presentation slides:		* Presentation slides:
	[[File:2026 03 CANSAS Grenoble Resol Fn JFMoulin.pdf\|thumb\|Introduction to ToF Resolution aspects - Jean-Francois Moulin]]		[[File:2026 03 CANSAS Grenoble Resol Fn JFMoulin.pdf\|thumb\|Introduction to ToF Resolution aspects - Jean-Francois Moulin]]
			[[File:TopervergGISANS2026ILL1-part1.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 1]]
			[[File:TopervergGISANS2026ILL1-part2.pdf\|thumb\|Talk "DWBA: kinematics, coherence & resolution issues" from Boris Toperverg - Part 2]]
	* Add slides from Boris Toperverg: check what to do when file too big		* Add slides from Boris Toperverg: check what to do when file too big
	* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]		* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]
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	'''POINT K. Off-specular scattering:'''<br />		'''POINT K. Off-specular scattering:'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:Gutfreund OffSpec new part 1.pdf\|thumb\|Talk on "Offspecular Scattering" from Philipp Gutfreund - Part 1]]
			[[File:Gutfreund OffSpec new part 2.pdf\|thumb\|Talk on "Offspecular Scattering" from Philipp Gutfreund - Part 2]]
	* Further Notes from the ILL-Workshop on: [[/Off-Specular Scattering]]		* Further Notes from the ILL-Workshop on: [[/Off-Specular Scattering]]

	'''POINT L. Magnetic Scattering:'''<br />		'''POINT L. Magnetic Scattering:'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:Magnetic GISANS.pdf\|thumb\|Talk on "Magnetic and PA-GISANS" from Annika Stellhorn]]
	* Further Notes from the ILL-Workshop on: [[/Notes Magnetic Scattering]]		* Further Notes from the ILL-Workshop on: [[/Notes Magnetic Scattering]]

Annikastellhorn: /* First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18 */

2026-03-25T15:51:34Z

First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18

← Older revision		Revision as of 15:51, 25 March 2026
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	'''POINT G. Need good documentation'''<br />		'''POINT G. Need good documentation'''<br />
	* ~~Presentation slides:~~		* No Introduction talk

	* Further Notes from the ILL-Workshop on: [[/Documentation]]		* Further Notes from the ILL-Workshop on: [[/Documentation]]

	'''POINT H. Integration of McStas with BornAgain'''<br />		'''POINT H. Integration of McStas with BornAgain'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:HF McStas.pdf\|thumb\|Introduction on McStas - Henrich Frielinghaus]]
	* Further Notes from the ILL-Workshop on: [[/McStas]]		* Further Notes from the ILL-Workshop on: [[/McStas]]

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	'''POINT J. Computer simulations / AI support:'''<br />		'''POINT J. Computer simulations / AI support:'''<br />
	* ~~Presentation slides:~~		* No Introduction talk
	* Further Notes from the ILL-Workshop on: [[/Computer simulations / AI support]]		* Further Notes from the ILL-Workshop on: [[/Computer simulations / AI support]]

Annikastellhorn: /* Discussion session notes */

2026-03-25T15:38:11Z

Discussion session notes

← Older revision		Revision as of 15:38, 25 March 2026
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	'''POINT D. Normalization''' <br />		'''POINT D. Normalization''' <br />
	* Presentation slides:		* Presentation slides:
			[[File:GISANS-NormalizationDiscussionStarters.pdf\|thumb\|Introduction to Normalization - Sebastian Jaksch]]
	* Further Notes from the ILL-Workshop on: [[/Normalization]]		* Further Notes from the ILL-Workshop on: [[/Normalization]]

	'''POINT E. Using SANS software''' <br />		'''POINT E. Using SANS software''' <br />
	* ~~Presentation slides:~~		* No introduction talk
	* Further Notes from the ILL-Workshop on: [[/Using SANS software]]		* Further Notes from the ILL-Workshop on: [[/Using SANS software]]

	'''POINT F / Instrumentation & Q/lambda resolution ~~(different detector arrays, or, sample geometries-how is data reduced)~~'''<br />		'''POINT F / Instrumentation & Q/lambda resolution'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:2026 03 CANSAS Grenoble Resol Fn JFMoulin.pdf\|thumb\|Introduction to ToF Resolution aspects - Jean-Francois Moulin]]
			* Add slides from Boris Toperverg: check what to do when file too big
	* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]		* Further Notes from the ILL-Workshop on: [[/Instrumentation & Q/lambda resolution]]

	'''POINT G. Need good documentation'''<br />		'''POINT G. Need good documentation'''<br />
	* Presentation slides:		* Presentation slides:

	* Further Notes from the ILL-Workshop on: [[/Documentation]]		* Further Notes from the ILL-Workshop on: [[/Documentation]]

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	'''POINT M. Data Reduction:'''<br />		'''POINT M. Data Reduction:'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:2026 03 CANSAS Grenoble Data Reduction TOF JFMoulin.pdf\|thumb\|Introduction to ToF Data Reduction - Jean-Francois Moulin]]
	* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]		* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]

Annikastellhorn: /* First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18 */

2026-03-25T15:28:17Z

First workshop at ILL, France: "GISANS - Advancing data reduction and analysis" 2026-03-17/18

← Older revision		Revision as of 15:28, 25 March 2026
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	'''POINT B. Multiple scattering'''<br />		'''POINT B. Multiple scattering'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:HF_MuSc GISANS.pdf\|thumb]]
	* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]		* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]

	'''POINT C. Background handling'''<br />		'''POINT C. Background handling'''<br />
	* Presentation slides:		* Presentation slides:
	[[File:~~GISANS 2026 File Formats - Brian Maranville~~.pdf\|thumb~~\|Introduction on File Formats - Brian Maranville~~]]		[[File:Background ideas.pdf\|thumb]]
	* Further Notes from the ILL-Workshop on: [[/Background handling]]		* Further Notes from the ILL-Workshop on: [[/Background handling]]

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	'''POINT I. Get a common data format for GISANS data reduction:'''<br />		'''POINT I. Get a common data format for GISANS data reduction:'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:GISANS 2026 File Formats - Brian Maranville.pdf\|thumb\|Introduction on File Formats - Brian Maranville]]
	* Further Notes from the ILL-Workshop on: [[/Common Data Format]]		* Further Notes from the ILL-Workshop on: [[/Common Data Format]]

Annikastellhorn: /* Discussion session notes */

2026-03-25T15:26:16Z

Discussion session notes

← Older revision		Revision as of 15:26, 25 March 2026
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	'''POINT B. Multiple scattering'''<br />		'''POINT B. Multiple scattering'''<br />
	* Presentation slides:		* Presentation slides:
	* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]		* Further Notes from the ILL-Workshop on: [[/Multiple Scattering]]

	'''POINT C. Background handling'''<br />		'''POINT C. Background handling'''<br />
	* Presentation slides:		* Presentation slides:
			[[File:GISANS 2026 File Formats - Brian Maranville.pdf\|thumb\|Introduction on File Formats - Brian Maranville]]
	* Further Notes from the ILL-Workshop on: [[/Background handling]]		* Further Notes from the ILL-Workshop on: [[/Background handling]]

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	* Presentation slides:		* Presentation slides:
	* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]		* Further Notes from the ILL-Workshop on: [[/Notes Data Reduction]]


	==== Organizational notes ====		==== Organizational notes ====

Annikastellhorn at 14:01, 25 March 2026

2026-03-25T14:01:41Z

@@ Line 213: / Line 213: @@
 ==== Summary ====
 ==== Outlook ====
 *	Letter in "Neutron News"

Annikastellhorn at 13:53, 25 March 2026

2026-03-25T13:53:14Z

← Older revision		Revision as of 13:53, 25 March 2026
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	==== Summary ====		==== Summary ====

			==== Outlook ====
			* Letter in "Neutron News"