Commissioning experts call. Please refer to the beamline webpage for the description of available techniques within the current open call.

The CoSAXS beamline is a state-of-the-art multipurpose Small Angle X-ray Scattering (SAXS) instrument with opportunities to use the inherent high coherent properties of the 3 GeV MAX IV ring through X-ray Photon Correlation Spectroscopy (XPCS) experiments. It offers high brilliance, monochromatic and tuneable X-rays, with outstanding performance in low beam divergence, high X-ray flux, and variable beam size in both directions in the full range of the sample-detector distances provided by the beamline (up to 17 m). The optical and mechanical design of the CoSAXS instrument has been carefully developed to preserve the wavefront and the entire coherent flux as much as possible.
This high-performance X-ray beam is complemented by an exceptional pool of sample environments and detector systems. Several techniques are available through modular operation: time resolved SAXS, SAXS/WAXS, protein solution SAXS, microfocusing SAXS, anomalous X-ray scattering and XPCS. It will meet the demands of a large and broad community of users.

Endstations or Setup

Experimental station

Experimental station:
CoSAXS will be equipped with a versatile sample stage that can handle samples of different size and weight.


Sample Type
Crystal, Amorphous, Fiber, Gel, Liquid
Mounting Type
Automatic sample changer.
Microfluidic flow cells.
Flow, and reaction cells.

Manipulator or Sample stage

Automatic sample changer:
16-position solid sample holder in a 4 x 4 array. The samples should be in liquid-tight aluminium cells with thin mica or mylar windows 6-position gel sample holder.
6-capillary sample holder. Samples can be loaded into 1.5 mm diameter quartz capillaries in a holder within a thermostatically controlled water bath.
Basic capillary rack. A number of capillaries can be mounted vertically within an aluminium block. Please note that for weakly scattering systems, reproducibility and background subtraction may be more difficult in this set-up.

Sample Environment

Linkam DSC stage:
For rapid (80 °C/min) heating and simultaneous measurement of heat flow.
80 - 573 [K]
Linkam THMS 600:
Heating stage for 1.5 mm diameter capillaries, equipped with LN2 cooling.
80 - 573 [K]
Microfluidic flow cell:
An adaptive microfluidic platform is being developed in collaboration with the Balder and MicroMAX beamlines (SSF funded project Adaptocell).
The flow is controlled using an OB1 from Elveflow OB1 flow pressure/flow controller, and the flow rate is monitored using Elveflow Microfluidic Flow Sensor. Flow range: 0.07ul/min and 1ml/min. Switching is possible between 10 lines of samples and mixing 6 set of samples/reagents.
A commercial rheometer with SAXS attachments.
Solution SAXS and BioSAXS:
Automatically controlled pipetting sample loader from two 96-well plates.
Thermostatic temperature control of the plates and the measuring capillary.
In-line UV-Vis and HPLC measurements.
Automated cleaning system and programmable sample queue.
Stopped-flow rapid mixing device:
An instrument with four syringes and three mixing chambers.
Sample environment for simultaneous SAXS, UV-Vis, and fluorescence, using 5 mm diameter, quartz capillary and Peltier heating control.

SAXS detector

Dectris Eiger2 4M
Number of detector modules: 2 x 4
Sensitive area (width x height) [mm²]: 155.1 x 162.2
Gap width vertical / horizontal [pixels]: 12 / 38
Energy discriminating thresholds: 2
Count rate capability [photons/s/pixel]: 10⁷
Point-spread function: 1 (FWHM)
Data format: HDF5 / NeXus
Vacuum Compatible: Yes
Frame rate [Hz]: 750 (500 stable)
Energy range [keV]: 6.0 – 40
Time Resolved
Pixel Size
X = 75 [um], Y = 75 [um]
Array Size
X = 2068 [pixel], Y = 2162 [pixel]
450 [um]


Detected Particle
Ann Terry
  • Small angle scattering
  • Time-resolved scattering
  • Wide angle scattering
Life Sciences & Biotech
  • Protein and macromolecular structures
Material Sciences
  • Other - Material Sciences
  • Nanophysics & physics of confined matter
  • Soft condensed matter physics
  • Surfaces, interfaces and thin films
control/Data analysis
Control Software Type
  • TBC
Data Output Type
  • TBC
Data Output Format
  • TBC