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titleSample mounting, size, and thickness

Samples are best mounted on a 25 mm metal disc to ensure correct positioning in the macro-ATR accessory. The sample itself may be mounted on (for example) a glass slide, which can then be mounted on the metal disc with a weak adhesive. The beamline has a number of 25 mm discs of various thicknesses (2 - 10 mm height) available for use during your beamtime, including one heating/cooling mounting disc for temperature controlled studies. (See figure below)

Figure: [Left] 25 mm diameter metal discs for mounting macro-ATR samples. [Right] Temperature controlled macro-ATR sample mounting disc

Warning

Sample size and positioning on the disc

The macro-ATR unit has a limited travel range in the xy- and z- directions. Therefore, it is imperative that your sample conforms to the following conditions:

  • The total height of the sample and mounting must be < 11 mm

  • The region of interest to measure must be located within the central 5 × 5 mm area of the sample mounting location on the macro-ATR accessory (i.e. in the middle of the 25 mm diameter metal mounting disc)

  • Again, it is highly recommended to use one of the 25 mm metal mounting discs to ensure correct positioning into the macro-ATR accessory

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