A5012963252- Calibration and Measurement Techniques
- Atmospheric Ozone and Climate
- Scientific Measurement and Uncertainty Evaluation
- Diamond and Carbon-based Materials Research
- Atmospheric aerosols and clouds
- Laser-induced spectroscopy and plasma
- Photocathodes and Microchannel Plates
- Radiative Heat Transfer Studies
National Physical Laboratory
2020
This report gives the results of EURAMET.PR-K1.a-2009 Comparison Spectral Irradiance over wavelength range 250 nm - 2500 nm. Seven laboratories took part, including pilot. In general are consistent, with a few exceptions as explained in report. The EURAMET.PR-K1.a Key detailed this was carried out to establish degrees equivalence for participating European respect Reference Value (KCRV) CCPR-K1.a Comparison. The piloted by National Physical Laboratory (NPL), who also acted pilot Comparison;...
We present the results from Verification of Reference Irradiance and Radiance Sources Laboratory Calibration Experiment Campaign. Ten international laboratories took part in measurements. The spectral irradiance comparison included measurements 1000 W tungsten halogen filament lamps range 350 nm–900 nm pilot laboratory. radiance a form round robin where each participant turn received two transfer radiometers did calibration their own have seven bands covering wavelength 400 nm–700 nm. showed...
Abstract We have assessed the absolute spectral responsivities of three-element trap detectors calibrated against National Physical Laboratory primary standard cryogenic radiometer at eight krypton ion laser emission wavelengths over an approximate period 20 years. As expected, we observed that decrease with time. Additionally, found as wavelength decreases, ageing rate increases. At 356.4 nm, average responsivity around −1800 ppm yr −1 is reported. While longer wavelengths, slowest ageing,...
Main text This report describes the Key Comparison of Consultative Committee for Photometry and Radiometry CCPR-K1.a.2017 Spectral Irradiance in wavelength range 250 nm to 2500 nm. Tungsten quartz halogen lamps FEL type (1000 W) were used as artefacts. Each participant its own set lamps. The star scheme measurements was applied with sequence - pilot participant. Twelve National Metrology Institutes participated comparison. participant's measurement data based on a totally independent...