EOS IR
MID-IR Nanosecond Transient Absorption Spectrometer
EOS IR is a broadband mid-infrared pump-probe nanosecond Transient Absorption Spectrometer. As a complete turn-key system, EOS IR can measure photoinduced absorbance changes across a broad (2-13 µm) spectral range with nanosecond time resolution over a large time window, adjustable to sub-milliseconds. While EOS IR can operate as a standalone spectrometer it is usually integrated with HELIOS IR, our broadband pump-probe femtosecond transient absorption spectrometer. EOS IR and HELIOS IR share most of the components, including the optics and the detectors. Thus, making the integration extremely cost effective. When integrated, HELIOS IR and EOS IR cover the time window from picoseconds to sub-milliseconds without any gaps.
Probe spectral range
Typically 2-13 µm. Extendable to 20 µm.
Variable spectral resolution and spectral range
When EOS-IR is used with an array (multipixel) detector it is necessary to be able to vary the resolution with which the probe spectrum is imaged on the sensor. This allows to ensure that the desired spectral features are resolved and to also control the acquired spectral range. For this we utilize a three-grating imaging spectrograph (320 mm; f/4.1) to allow for different detection bandwidths and spectral resolution.
The system comes standard with the following gratings:
3-9 µm, 0.4 µm bandwidth with 6.2 nm resolution
4-10 µm, 0.8 µm bandwidth 12.4 nm resolution
3-9 µm, 1.2 µm bandwidth 18.6 nm resolution
Custom gratings are available on request. The full selection of gratings can be found here.
Sub-nanosecond resolution with a sub-millisecond time window
EOS IR is pump-probe spectrometer offering the time resolution unattainable through conventional flash photolysis based on the continuous photoelectric method. In EOS IR the pump-probe delay is controlled electronically, and the maximum time window is very close to half the repetition period of the pump laser. The maximum time window can be calculated as: (pump laser repetition period)/2-100 µs. For example for 1 kHz pump lasers it is 400 µs.
Detectors
EOS-IR can be configured with various MCT detector options, including dual multipixel arrays.
Available MCT detector configurations:
Single-pixel elements
1×2 (two single pixel detectors with probe reference)
Multi-pixel arrays
32 pixels
64 pixels
128 pixels
Dual multi-pixel arrays (with probe reference)
16 pixels x2
32 pixels x2
64 pixels x2
Dimensions
Optical bench:
W34” x L56” x H14” (W864 x L1425 x H356 mm)
Electronics rack:
W21” x L24” x H27” (W534 x L610 x H686 mm)
EOS IR features versatile and user-friendly LabVIEW based software for instrument control and data acquisition.
The software is also very user-friendly and versatile:
Automated alignment of the optical delay line.
Supports computer controlled translating sample holder.
Supports pump beam shutter.
Supports motorized filter wheel for automated pump intensity control.
Saves every individual kinetic scan, so if experiment is aborted (due to laser fluctuations, power outages, etc.) all previous scans are not lost.
Threshold adjusted automatic probe intensity spike rejection –advanced setting which collects data points again if the probe is not stable.
Support for multiple choppers to facilitate customized experiments.
API (Application Programming Interface) for EOS IR is provided for further experiment customization and integration with external applications.
商品属性 [波长范围] 2-13 µm