Cvd Diamond Windows Tender in USA - 3608450

Procurement Summary

Country: USA

Summary: Cvd Diamond Windows

Deadline: 15 Sep 2015

Posting Date: 03 Sep 2015

Other Information

Notice Type: Tender

TOT Ref.No.: 3608450

Document Ref. No.: NNG1559546Q

Competition: ICB

Financier: Self Financed

Purchaser Ownership: -

Tender Value: Refer Document

CPV Classification

44221100 - Windows

Purchaser's Detail

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Tender Details

Nasa/gsfc has a requirement for two diamond vacuum windows and a substrate window with the following capabilities: 1) our experiment requires the vacuum windows and substrate to be composed of cvd diamond material. This is critically necessary in order to transmit radiation across the visible, infrared, and terahertz spectral regions without breaking the purge. 2) the diamond windows must be embedded in uhv conflate vacuum flanges using hermetic diamond-metal joints (optimized for low thermo-mechanical stress and a wide range of operation temperatures). 3) cvd diamond windows, optical quality - flat faces polished, surface roughness 20 nm rms, - side faces laser cut, - diameter 38 mm, clear aperture 33 mm, - central thickness: 900100 i1/4m - wedge: 0.50.1 - flatness of the unmounted windows: 3 fringes over the free aperture area 4) flange mountings: window braze-sealed into conflat uhv flange, - flange size: standard 2.75 inch conflat (cf 40) 5) uhv window specifications and cerificates: window bakeable at 250 c - window operatable at 230c - window tested to 1 bar differential pressure - leak rate 1 x 10-10 bar.cm3/sec he 6) optical grade cvd diamond window: optical grade polycrystalline cvd diamond, polished, ra 20nm, wedge : 0.05, central thickness : 1000i1/4m (-100/+100i1/4m), planarity : better lambda/2 at 633nm until 1mm from the edge diameter : 25.4mm (i

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