Synchrotron radiation-based irradiance calibration from 200 to 400 nm at the Synchrotron Ultraviolet Radiation Facility III.
A new facility for measuring irradiance in the UV was commissioned recently at the National Institute of Standards and Technology (NIST). The facility uses the calculable radiation from the Synchrotron Ultraviolet Radiation Facility as the primary standard. To measure the irradiance from a source under test, an integrating sphere spectrometer-detector system measures both the source under test and the synchrotron radiation sequentially, and the irradiance from the source under test can be determined. In particular, we discuss the calibration of deuterium lamps using this facility from 200 to 400 nm. This facility improves the current NIST UV irradiance scale to a relative measurement uncertainty of 1.2% (k=2).
Shaw
Ping-Shine
PS
National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. shaw@nist.gov
Arp
Uwe
U
Saunders
Robert D
RD
Shin
Dong-Joo
DJ
Yoon
Howard W
HW
Gibson
Charles E
CE
Li
Zhigang
Z
Parr
Albert C
AC
Lykke
Keith R
KR