Procurement part Nr. 5. RAMAN spectrometer

Specialized equipment set for Raman scattering spectroscopy and spectra recording in stratified gas flows. Equipment consists of an imaging spectrograph with an EMCD type multi-channel detector and SDDS laser with optical elements:

Eil. Nr. / Technical parameter / Required value
I / Spectrograph
1 / Optical configuration / Czerny-Turner type imaging spectrograph with triple grating motorized turret
2 / Focal length / Not less than 500 mm
3 / Linear dispersion / Not worse than 1,6 nm/mm (at 500nm using 1200mm-1 grating)
4 / Wavelength Accuracy / Not worse than 0,2nm (with 1200mm-1 grating)
5 / Wavelength Repeatability / Not worse than 0,05nm
6 / Slit / Software-controlled motorized and gradually adjustable in the range not less than 0-12 mm, with an adjustment accuracy not worse than ±5µm
7 / Grating turret / Not worse than with two grates:
1) 1800 mm-1 Groove Density with Blaze Wavelength ~ 500 nm,
2) 150 mm-1 Groove Density with Blaze Wavelength ~500 nm;
special mirror - required
8 / Grating size / Not less than 68×68mm
9 / Computer interface / USB or RS-232
II / Multichannel detector
1 / Detector type / Thermoelectrically cooled, Back-illuminated EMCCD with Frame-transfer architecture and Electron Multiplication (EM).
2 / Detector format / Not less than 510 x 510 imaging pixels,
imaging area not smaller than 8 x 8 mm.
3 / Cooling / To not less than -80°C with not worse than ±0,05°C accuracy
4 / Built-in shutter and precision light source for calibration / Necessary
5 / Quantum Efficiency in 500 – 700 nm wavelength area / Not less than 90%
6 / Read noise (rms) / ≤25 e- in Electron Multiplication (EM) mode and
≤ 12e- in normal CCD mode, at 5 MHz readout
7 / Dark current (at -70°C) / Not higher than 0,005 e-/p/s
8 / Electron multiplication (EM) gain / Not less than 1 to 1000x
9 / Digitization / Not less than 16 bits, from ≤100 kHz to ≥10 MHz in Electron Multiplication (EM) mode and ≥5 MHz in normal CCD mode
10 / Aadjustable C-mount / Necessary
11 / Computer interface / 1000 Mbit Ethernet or similar
III / Laser
1 / Laser type, wavelength, power / Diode Pumped Solid State type (DPSS), ~532 nm, with minimum 500 mW output power
2 / Laser Beam Quality / Single Mode, TEM00, M2 ≤1,1, noise not higher than 0.25% rms, spectral linewidth – no more than 1 MHz (0.01 pm)
IV / Optical elements
1 / Set of optical elements / Necessary:
Lens, mirrors and other optical elements for the laser beam targeting and collection of the scattered light.