title: Synchrotron radiation-based irradiance calibration from 200 to 400 nm at the Synchrotron Ultraviolet Radiation Facility III.
abstract: 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).
authors.affiliation: National Institute of Standards and Technology, Gaithersburg, MD 20899, USA. shaw@nist.gov
authors.forename: Ping-Shine
authors.initials: PS
authors.lastname: Shaw
authors.forename: Uwe
authors.initials: U
authors.lastname: Arp
authors.forename: Robert D
authors.initials: RD
authors.lastname: Saunders
authors.forename: Dong-Joo
authors.initials: DJ
authors.lastname: Shin
authors.forename: Howard W
authors.initials: HW
authors.lastname: Yoon
authors.forename: Charles E
authors.initials: CE
authors.lastname: Gibson
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Li
authors.forename: Albert C
authors.initials: AC
authors.lastname: Parr
authors.forename: Keith R
authors.initials: KR
authors.lastname: Lykke