منابع مشابه
Ac-dc Current Transfer Standards and Calibrations at Nrc
This paper describes efforts undertaken to upgrade ac-dc current transfer standards and calibrations at the National Research Council of Canada. The ac-dc current transfer comparator has been redesigned, using guarding techniques most advantageous for the current shunt comparisons. A set of coaxial shunts for currents between 10 mA and 10 A has been built, and characterized up to 100 kHz by a s...
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Tests were conducted to verify that new air monitoring systems at Hanford air exhaust stacks met the Draft HPS/ANSI N13.1 performance criteria developed for air sampling systems at nuclear facilities.(‘) The standard’s performance criteria address both the suitability of the air sampling probe location and the sample transport to the collection devices. The contaminants in a stack must be well ...
متن کاملOptical Fiber Power Meter Calibrations at NIST
The optical fiber power meter (OFPM) is perhaps the most common type of test equipment used to support the development and implementation of optical fiber systems. To address the inherent metrology requirements, NIST has developed and implemented measurement services to help characterize these instruments [1]. These measurement services consist primarily of absolute laser power calibrations usi...
متن کاملAn International Comparison of Ac Josephson Voltage Standards between Nrc, Canada and Vsl, the Netherlands
The paper presents results of an international comparison of two quantum AC Josephson Voltage Standards based on pulse-driven Josephson arrays. The two systems differ in several hardware and software characteristics as well as in the level of automation, features which can influence the accuracy of transferring the quantum-standard voltage value to a calibrated instrument. The comparison was co...
متن کاملQuadrupole Shunt Experiments at SPEAR*
As part of a program to align and stabilize the SPEAR storage ring, a switchable shunt resistor was installed on each quadrupole to bypass a small percentage of the magnet current. The impact of a quadrupole shunt is to move the electron beam orbit in proportion to the off-axis beam position at the quadrupole and to shift the betatron tune. Initially, quadrupole shunts in SPEAR were used to pos...
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ژورنال
عنوان ژورنال: NCSLI Measure
سال: 2010
ISSN: 1931-5775,2381-0580
DOI: 10.1080/19315775.2010.11721538