- Instrument control
- Detectors and energy range
- Performance and calibration
- Beam intensity and noise measurements
- Beamline performance and calibration
Two single-point detectors are currently available for use with the Hyperion 2000 microscope. Most measurements are conducted using a narrow-band, high sensitivity, liquid nitrogen cooled Mercury Cadmium Telluride (MCT) detector. It is currently optimised for a wavelength range of 3800-700 cm-1; the high wavenumber range can be extended to 6000 cm-1 if required. A wide-band MCT detector is also available and extends the far IR detection range beyond that of the narrow-band detector but with a 10x loss of sensitivity. Please see our FAQ page for more information.
- Narrow Band (50 micron detector element); low wavenumber limit 700 cm-1
- Wide Band (100 micron detector element); low wavenumber limit 550 cm-1
- Reference and sample = Gold mirror
- Beam defining aperture = 5 × 5 microns at sample
- Detector = Narrow-band MCT 50 micron element
- Acquisition speed = 40 kHz
- Number of scans = 128 averages
- Apodisation = Beckmann-Harris
- Zero filling = 2 levels
|2450-2550 cm-1||1190-1290 cm-1
Figure 1. A demonstration of the achievable spatial resolution using the Hyperion 2000 IR microscope: a) Polymer pattern on calcium fluoride produced by photolithography; b) FTIR chemical map showing an absorbance image integrated over 2935±125cm-1; c) FTIR chemical map integrated over 1701±59cm-1. FTIR experimental conditions: 3x3 micron aperture, 2 micron step size, 4 cm-1 resolution.
Figure 2. A comparison of the signal-to-noise recorded for the CH stretch absorption bands from a 5 mm spot on a biological tissue sample between the synchrotron and a conventional mid-IR source. FTIR spectral conditions: 128 averaged scans, 5x5 micron aperture, 4 cm-1 resolution.
RMS% noise @ 2550-2450 cm-1