Comparison of the NIST SURF and argon miniarc irradiance standards at 214 nm

Judith L. Lean; Henry J. Kostkowski; R. D. Saunders; L. R. Hughey

doi:10.1364/AO.28.003246

Applied Optics
Vol. 28,
Issue 15,
pp. 3246-3253
(1989)
•https://doi.org/10.1364/AO.28.003246

Comparison of the NIST SURF and argon miniarc irradiance standards at 214 nm

Judith L. Lean, Henry J. Kostkowski, R. D. Saunders, and L. R. Hughey

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Judith L. Lean, Henry J. Kostkowski, R. D. Saunders, and L. R. Hughey, "Comparison of the NIST SURF and argon miniarc irradiance standards at 214 nm," Appl. Opt. 28, 3246-3253 (1989)

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Abstract

Comparison of NIST’s SURF-II primary irradiance standard and argon miniarc irradiance standard at 214 nm with an uncertainty of ~3% shows that at this wavelength these irradiance standards agree to within the uncertainties of 1.3 and 7%, respectively, assigned to them by NIST.

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	Uncertainty (%)
SURF-II:
Reflections	0.4
Fuzz	—
Distance	0.04
Argon miniarc
Distance	0.8
Drift	1.0
Relighting	2.0
Current measurement	0.24
Pressure	0.8
Alignment	—
Spectroradiometer
Spectral scattering	—
Signal level/stability	1.0
Wavelength/repeatability	0.1
Cosine law departures	0.2
Diffuser non-uniformity	—
Linearity	1.25
Signal/noise	0.9
Polarization	—
Effective wavelength	—
Window transmittance changes	1.0
Fluorescence	0.05
Total comparison uncertainty (in quadrature)	3.3
NIST reported uncertainty (1σ) for SURF irradiance at 214 nm4	1.3
NIST reported uncertainty (2σ) for argon arc irradiance at 214 nm10	7

Date	$E_{ARC}^{SURF}$ (from arc and comparison measurement)	$E_{BC}^{SURF}$ (from NIST calculation and beam current)	$\frac{E_{ARC}^{SURF}}{E_{\begin{matrix} BC \end{matrix}}^{SURF}}$
Date	10⁹ photons/cm²/s/nm/mA
5/14/85	2.255	2.200	1.025
5/15/85	2.273	2.200	1.033
5/24/85	2.140	2.200	0.973
		Mean = 1.01

	Uncertainty (%)
SURF-II:
Reflections	0.4
Fuzz	—
Distance	0.04
Argon miniarc
Distance	0.8
Drift	1.0
Relighting	2.0
Current measurement	0.24
Pressure	0.8
Alignment	—
Spectroradiometer
Spectral scattering	—
Signal level/stability	1.0
Wavelength/repeatability	0.1
Cosine law departures	0.2
Diffuser non-uniformity	—
Linearity	1.25
Signal/noise	0.9
Polarization	—
Effective wavelength	—
Window transmittance changes	1.0
Fluorescence	0.05
Total comparison uncertainty (in quadrature)	3.3
NIST reported uncertainty (1σ) for SURF irradiance at 214 nm4	1.3
NIST reported uncertainty (2σ) for argon arc irradiance at 214 nm10	7

Date	$E_{ARC}^{SURF}$ (from arc and comparison measurement)	$E_{BC}^{SURF}$ (from NIST calculation and beam current)	$\frac{E_{ARC}^{SURF}}{E_{\begin{matrix} BC \end{matrix}}^{SURF}}$
Date	10⁹ photons/cm²/s/nm/mA
5/14/85	2.255	2.200	1.025
5/15/85	2.273	2.200	1.033
5/24/85	2.140	2.200	0.973
		Mean = 1.01

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Applied Optics