Information for the Limited Availability, General User Call (2021-03-16):

CoSAXS is a hard X-ray SAXS/WAXS beamline on the 3 GeV ring at MAX IV. In autumn 2019, the commissioning of the beamline optics was started. During spring 2020, the beamline installation has been completed and full commissioning begun. The photon energy available at CoSAXS during commissioning and general user experiments from autumn 2020 will be limited to 12.4 keV, with an accessible q-range from between 1×10-3 to 0.5 Å-1. Most sample environments will be in air.

A call has been opened for general users, however, there will be limited time available due to the continued commissioning of CoSAXS. Details of what will be offered in the call are below. Due to the high brilliance of CoSAXS, many samples will need to be under flow or move to avoid radiation damage. Please consider pre-characterisation of all samples, their stability and sensitivity to radiation damage, where appropriate.


Basic SAXS sample environment for liquids and solid samples (room temperature)

Autoloader and flow through capillary cell for solutions


Laser triggered, temperature jump time-resolved SAXS (2 ms time-resolution), at 12.4 keV, q-range 1×10-3 to 0.5 Å-1 and ca. 1.5 to 2.3 Å-1. Laser system: Fiber coupled (200 µm diameter fiber), 50 W, 1470 nm CW laser gated by TTL pulse to achieve pulse lengths down to 1 ms.

Multiple sample holders for either capillaries or solid samples, with thermostatic water bath

Linkam heating stage HFS-X350 for capillaries, with liquid nitrogen cooling pump LNP96, temperature range -195 to 350 oC

For further information on Sample Environment see here

  • Fixed energy of 12.4 keV (DCM Si111).
  • SAXS detector is the Eiger2 4M.
  • Q-range will cover 1×10-3 to 0.5 Å-1 (requiring multiple detector positions).
  • Most sample environments will be at ambient pressure.
  • No gas handling will be available at the sample position.