ID10B Langmuir Trough

Fig. 1: Side view of the ID10 Langmuir trough.

The ID10 station is equipped with a Langmuir trough. Figure 1 shows a side view of this equipment. On this picture, the X-ray beam goes from left side, scatters on the surface and passes through Sollers collimater to a linear detector. The Langmuir trough is equipped with a moveable single barrier. The surface pressure is measured using a Wilhelmy balance (Surface Pressure Sensor Model PS4, Nima Technology Ltd). The barrier position and the surface pressure are controlled by SPEC via R&K system. The trough is sealed and filled with helium (cover is not shown). The Langmuir trough is mounted on active vibration isolation system (MOD-2 S, Halcyonics). Optionally the Langmuir trough maight be connected to thermostated bath.

Dimensions:

  • Width 170 mm (size along the beam)
  • Length 438 mm (size along direction of the barrier movement)
  • Depth 3 mm
  • Volume: 1) Without the meniscus 22.34 cl ; 2)With the meniscus (~2 mm above the edge of the trough) 37.23 cl
  • Maximum compression rate 6
  • Area in compressed state : 61 x 170 mm2
  • Area in expanded state: 418 x 170 mm2
  • Temperature rainge +10oC  -  +30oC
  • Standard size of the filter paper for Nima pressure sensor: 10mm x 25 mm

Tensiometer

Nima head. Filter paper dimension 10 mm x 25 mm (for example Whatman(R): 542, Hardened Ashless, circles 90 mm diameter, Cat.No. 1542 090)