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We experimentally investigate gain dynamics and temporal characteristics of a free-space nitrogen laser pumped by circularly-polarized femtosecond laser pulses based on the pump-probe scheme.
The absolute measurement of the mass, as well as the determination of the Planck constant, has become one of the most important issues in metrology toward a new kilogram definition based on fundamental constant. A method for measuring the inertial mass, being different from the gravitational mass measurement by either a watt balance or the Avogadro project has been carried out recently at National...
A review of L-band sheet beam development at SLAC National Accelerator Laboratory's Klystron Department. The measured current density profile of a 40:1 elliptical beam is presented. A review of instabilities discovered while simulating the klystron are presented.
DDS sources were developed in NIM for impedance measurements. Stable and accurate phase difference can be obtained easily by this technique. It has been used for mutual inductance measurements and an uncertainty of 1×10-7 has been obtained.
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