The reference waveform with high linearity is generated with a 12 bit DAC,and itS amplitude is controlled with a 8 bit DAC. Because the channel advance and synchronous signals can be delaied arbityarily,excellent folded spectta can be acquired. This waveform generator can be controlled with DIP switches on faceplate or series interface of the IBM-PC microcomputer.
In this paper,we describe the installation of the front end of the light source,the alignment of the optic system of the beamline and the adjustment of the double crystal monochromator,including setting reference,technical requirements,regulating process and testing results.
The application of this coupled code system to the OECD NEACRP PWR hot zero power full core rod ejection benchmark problem shows that good agreement with the reference solu-tion is obtained, even when one node per assembly and one channel per assembly are used.
Based on the requirement of accelerator physics, the differences between the plane control network and plane deformation monitoring network in the Storage Ring, National Synchrotron Radiation Laboratory, are analyzed in this paper. In view of the surveying adjustment theory, adjustment computation steps for the newly established plane deformation network are deduced. And the problems of adjustment method after the datum change are resolved too.
introduce practical method to improve the detection efficiency of 3H,14C sample, as used for metrology technique research ,graduation solution of 3H,14C by National Primary Standard of 4πβ(LS)radioactivity.
The paper introduces a practical method to improve the detection efficiency of 3H,14C sample , used for metrology technique research, using 4πβ(LS) radioactivity of graduation solution of 3H,14C of National Primary Standard.
The system was composed of seven special NIMstandard plug unit, incluing synchro and asynchronous standard pulse generator,fast protecting circuit and delay amplifier circuits (used by eletron gun, travellingwave tube, klystron modulators and energy doubler in accelerator).
This paper describes a method of obtaining absorbed dose to water from a graphite ionization chamber as a national absorbed dose primary standard by using the Loevinger′s photon fluence scaling theorem.