Forgot Password | New Account

Lowest momentum transfer & lowest background small-angle neutron scattering instrument D11

D11 is the archetype of a long, pinhole geometry instrument for small-angle neutron scattering (SANS), designed for the study of large scale structures in chemistry, biology and solid state physics.

Back to ILL Homepage
www > Instruments & Support > Instruments & groups > D11 > More D11 & SANS

D11 parameters

Effective differential scattering cross section of a water standard sample

at D11

Water is used at D11 as a secondary calibration standard. Its effective differential scattering cross section, dΣ/dΩ in absolute units of  [cm-1] has been determined as a function of neutron wavelength λ [Å] by cross calibration against primary standards such as h/d polymer blends with exactly known molecular mass of the polymers.

The values given below are only valid for

- a water sample of thickness 0.1 cm,

- at a temperature of  25 deg C

and are instrument-specific, i.e. valid for the D11 3He CERCA detector (period 1999 - 2007).

Reference: Lindner P., “Water standard calibration at D11 verified with polymer samples”
J. Appl. Cryst.(2000) 33, 807 – 811


λ[Å]    dΣ/dΩ [cm-1]

 

4.51    0.857
5.00    0.872
5.25    0.880
6.00    0.905
7.00    0.941
8.00    0.982
9.00    1.026
10.0    1.074
12.0    1.186
12.5    1.217
15.0    1.396
16.0    1.479
17.0    1.569
18.0    1.666
19.0    1.771
20.0    1.885


To top

Sample environment

for soft matter experiments at D11

please contact the D11 instrument team (lindner(at)ill.eu, schweins(at)ill.eu, bowyer(at)ill.eu) for further information.


Some examples for available equipment are listed here:

I - Standard sample changers for temperature range 10 < T/°C < 80

  • Aluminium 22 positions for small Hellma cells (type 100 QS, 110 QS)
  • Aluminium 15 positions for large Hellma cells (type 404 QS)
  • Aluminium 17 positions for round Hellma cells (type 120 QS for biological samples)
  • Brass 9 positions for large samples

II - Standard sample changers for temperature range -20 < T/°C < 80

  • Copper 10 positions with precise temperature control
  • Sample changer for turbid suspensions (project, under construction)_

III - Standard sample changers for use in vacuum

  • see I, but mounted inside an evacuated box

IV - Furnaces with Eurotherm temperature controller

  • Heatable sample changer (T ≤ 250 °C, under vacuum) 2 blocks (2 positions each)

V - Shear apparatus for liquid systems/ complex fluids

  • Couette type shear cell
  • Bohlin rheometer (Searle type)

VI - "Lechner" pressure cell

  • Measurements at a constant pressure up to 2.4 kbar
  • Setup developed for time-resolved experiments after fast pressure jumps

VIi - Stopped flow apparatus

To top

Small Angle Neutron Scattering & SANS data treatment

SANS data treatment software at ILL

A concise description of SANS data treatment and ILL's standard programms is "A Computing Guide for Small Angle Scattering Experiments" (Ghosh et al. , 2005).

It is available for download here (pdf file size 1.3 MB)


Primary data reduction

Lindner P., “Scattering experiments: experimental aspects, initial data reduction & absolute calibration”
in “Neutrons, X-Rays and Light: Scattering methods applied to soft condensed matter”
Eds. P. Lindner & Th. Zemb, Elsevier – North Holland Delta Series, Amsterdam (2002)

and references given therein


Calibration of SANS data

Wignall, G.D., Bates F.
J. App. Cryst (1987) 20, 28 - 40

Lindner P., “Water standard calibration at D11 verified with polymer samples”
J. Appl. Cryst.(2000) 33, 807 – 811

Lindner P., Leclercq F., Damay P., “Analysis of water scattering used for calibration of small angle neutron scattering (SANS) measurements”
Physica B (2000) 291, 152 – 158


Training

e.g. the "Bombannes" school, periodically every two years: "Scattering Methods Applied to Soft Condensed Matter" .

Next event: 7 - 14 June 2008, Pre-registration deadline: 1 February 2008


Small Angle Scattering

Glatter, O., Kratky, O. "Small Angle Scattering" London: Academic Press (1982)

Brumberger H. "Modern Aspects of Small Angle Scattering" Dordrecht: Kluwer Academic Publishers (1995)


To top