Triple Stage Raman spectrograph/spectrometer Raman system with scanning microscopy attachment: QTY: One

Transcription

1 Specifications: Triple Stage Raman spectrograph/spectrometer Raman system with scanning microscopy attachment: QTY: One A. Triple Stage Raman spectrograph/spectrometer: 1. Spectral range : UV_Vis_NIR : nm optimized for UV-visible 2. Various Modes of operation : i) double additive + third : Triple additive ii) double subtractive + third : Spectrograph iii) single Stage : Spectrograph Easy software operated switching among all modes of operations. 3. Spectral resolution: i) Bandwidth per pixel (26 µm) at 500 nm with 1800 l/mm Triple (subtractive) and Single stage spectrograph : 0.75 cm -1 CCD coverage : ~ 1024 X bandwidth per pixel ii) Triple stage spectrometer (additive) : 0.2 cm -1 at 10 µm slit width at 500 nm with 1800 l/mm. 4. Reproducibility : ± one pixel or better 5. Low frequency : Triple stage spectrograph : up to 5 cm -1 With Triple stage additive : 5 cm Focal length of first two monochromators : 500 mm Third monochromator (spectrograph stage) : 600 mm 7. Gratings : holographic gratings 2400 l/mm : Quantity : three 1800 l/mm : Quantity : three 600 l/mm : Quantity : one 900 l/mm : Quantity : two With grating case for protection or mounted on grating turret/s. *The grating details to be mounted on turrets will be given at the time of P.O. Reflectivity curves for gratings and mirrors should be provided 8. Slits: Entrance, exit and intermediate slits. Entrance and exit slits with height limiter : 0-2 mm or better with resolution of 5 µm

2 Motorized intermediate slits: 0-12 mm or better with resolution 15 µm 9. Sample chamber : Macro and Micro with option to view the entrance slit image i) Macro sample chamber : Scattering geometry for Macro: 90 0 and (backscattering) Appropriate Focusing / collection optics with F/ 7.5 or better coupling with the monochromator Entrance slit viewing arrangement for focusing adjustment ii) Micro sample chamber: Microscope detail specifications are given in section B 10. Optics for single stage spectrograph operation: Interference Filters with 1 nm FWHM, 1 diameter for 363.8, 488 and nm Edge Filter with Holder for 488 and nm with transition Width 110 cm -1, O. D. > 6 UV Edge Filter with Holder for nm with transition Width 305 cm -1, O. D. > Optics for Polarization measurements: Half wave plate/s for UV, visible range. Scrambler/s for UV, visible range Analyzer/s for UV, visible range with extinction ratio of ³ 10 4

3 12. Detectors : 1. Single channel : Peltier cooled PMT : Qty : one each: PMT 1 and PMT 2 PMT 1 specifications: Head ON Dark current: 30 cps at C Gain: ³ 10 5 Wavelength range : nm Dynamic range : typical ³ cps QE: typical value ³ 15% at 250nm and ³ 20% at 500nm PMT 2 specifications: Head ON Dark current: 1 cps at C or 100 cps at Room temperature (25 0 C). Gain: 10 5 Wavelength range: nm Dynamic range: typical cps QE: typical value 15% at 500 nm Note: The PMTs should be inclusive of common peltier cooled housing and required electronics for cooling and photon counting data acquisition. 2. Multichannel : Peltier cooled CCD (inclusive of required housing and electronics for cooling) Open Electrode front illuminated. Pixel size : 26 µm x 26 µm or less* * Resolution mentioned in point 3 should be scaled accordingly.

4 Dimension : 1024 x 256 pixels with 26 µm pixel or equivalent for smaller pixel size. Spectral range : nm cooling temperature : C System Read-out noise : typical 6 e - rms or 100-kHz digitization / 4 e - 20-kHz digitization. Dark noise : minimum cooling temperature Quantum Efficiency at 25 0 C : 40% over nm and 20% over nm and nm Dynamic range : 16 bit v Certification for QE curve for PMT and CCD should be provided. v Two exit ports on third monochromator with appropriate opto-mechanical arrangement to switch from one to other port (CCD and PMT detector) should be provided. v The Raman system should include motorized ND filter wheel/assembly to allow variation of the intensity of the excitation wavelengths by at least 2 orders of magnitude for the entire range of operation with one beam stopper.

5 B. Microscope attachment 1. Working distance range up to 130 mm 2. Motorized X-Y stage: XY stage for Raman mapping/imaging : 75 mm x 50 mm or larger With step resolution: 0.1 µm 3. UV-visible confocal microscopy : Z stage motion: step size: 0.1 µm Aperture (variable): µm Revolving nosepiece : 6 objectives 4. Objectives: UV-visible range: Plano Achromatic Wavelength range: nm SWD (short working distance) o 20 X, NA 0.40 or better, WD 1.50 mm o 50X, NA 0.75 or better, WD 0.30 mm o 100 X, NA 0.90 or better, WD 0.20 mm LWD: (long working distance) o 20 X, NA 0.4 or better, WD mm o 50 X, NA 0.5 or better, WD mm Wavelength range: nm SWD: 40 X, NA 0.50 or better, WD 1.0 mm LWD: 15 X, NA 0.30 or better, WD 8.5 mm

6 5. Arrangement for One for viewing the sample with CCD camera** Second for coupling to the Raman spectrograph/meter ** CCD camera with frame grabber for viewing and taking optical image of the sample should be provided. 6. White light Illumination with halogen lamp (12V,100W) C. Software, hardware and power supply: 1. Complete Windows based software control for data acquisition in all modes. All the necessary manuals (both soft and hard copy) of the software should be supplied. 2. All the power supplies, interfaces, data acquisition electronics and control units required for Raman measurements in all the modes specified should be inclusive in the offer. 3. Raman spectroscopy software should include multiple spectral window joining with CCD background subtraction to increase the spectral window of measurement in multichannel detection mode with high spectral resolution. 4. PC and Monitor : Latest Windows operating system based-software pre-installed and ready to run, LCD display 23 or larger with up to date PC 5. To be operated at : 230 V ± 10% at 50 Hz ( Power supply ) D. Other facilities: 1. Hg / Ne lamp with power supply for calibration of a spectrometer should be provided. 2. Sokes /Anti Stokes accessory to allow low frequency measurements of both Stokes and Anti-Stokes data. E. Optional: 1. Spares: please also quote for important spares required for smooth operation of the system for 5 years. 2. Motor driven Rotational mounting stage for rotating the sample by 360 0

7 3. Thermometric cell attachment for microscope: lowest temperature : 80 K Highest temperature : 800 K Temperature stability : ± 1 0 K or better Complete with electronic interface, controls and mechanical components required for programmed operation using data acquisition software. 4. Half wave plates one each for 488 nm and nm wavelength. 5. Semi-apochromatic objectives for visible range: 10 X, NA 0.25 or better, WD 15 mm 100 X, NA 0.7 or better, WD 3.0 mm 6. Filters: i) Interference Filters with 1 nm FWHM, 1 diameter for and nm ii) Stokes and AntiStokes Edge Filters with Holder for and nm with transition width 250 cm -1 with O. D. > 6 iii) AntiStokes Edge Filter with Holder for 488 and 514 nm with transition width 100 cm -1 with O.D. > 6 7. Power meter for microscope, Range : ~ 100 µw mw, spectral range nm F. Warranty : All components of the system should have at least one year warranty from the date of installation at RRCAT site. G. Maintenance contract : Please also quote separately for our consideration an yearly maintenance contract (AMC) renewable up to 3 years after the warranty period, clearly indicating scope of AMC. H. Installation and training: The system should be satisfactorily installed at the RRCAT site. Pre-requirements for the installation should be communicated at the time of confirmation of P.O. The training for operation of the Raman system at the RRCAT site for two days should be provided after completion of the installation of the system. I. Acceptance Criteria: The item shall be accepted on the basis of successful operation and demonstration of all the quoted parameters at RRCAT site, by the service Engineer of the supplier or it s representative.

8 Before dispatch following spectra recorded on Instrument (Raman system) should be provided i) Hg/Ne lines to show claimed resolution/s in various modes of operation. ii) Observation of 9.5 cm -1 peak of L-Cystine. iii) Low frequency data showing confined acoustic phonon/s in the range cm -1 of commercially available Schott filter OG515/OG530 All the above measurements to be reproduced at the RRCAT site at the time of installation. The Raman mapping may be separately demonstrated on a suitable sample. Notes: 1. Operating manuals containing technical details and some details of the instruments should be provided. 2. The supplier shall confirm support for maintenance and after sales service. i.e. The manufacturers should have authorized sales / service representatives in India, if the principal is not located in India. 3. The suppliers should include, A) A list of customers to whom similar systems are supplied in India with their complete contact details. B) Compliance confirmation separately for each specification/parameters mentioned in the indent. 4. Quotations from the original manufacturers and their authorized representatives will only be considered. The authorization certificate should be provided along with the quotation and the original should be reproduced as and when required for verification.