V. A. Vesna, Yu. M. Gledenov, P. V. Sedyshev, E. V. Shul'gina, “New version of the integrated method for measuring small effects in experiments on beams extracted from a nuclear reactor at the effect sign switching frequency above the fundamental frequencies of the reactor power fluctuation spectrum”, Zhurnal Tekhnicheskoi Fiziki, 2010, Volume 80, Issue 11,Pages <nobr>140

This article is cited in 2 papers

Experimental Instruments and Methods

New version of the integrated method for measuring small effects in experiments on beams extracted from a nuclear reactor at the effect sign switching frequency above the fundamental frequencies of the reactor power fluctuation spectrum

V. A. Vesna^a, Yu. M. Gledenov^b, P. V. Sedyshev^b, E. V. Shul'gina^a

^a The Petersburg Nuclear Physics Institute, The National Research Center "Kurchatov Institute"
^b Joint Institute for Nuclear Research, Dubna, Moscow region

Abstract: The principles of construction and the results of testing of a system for measuring $P$-odd asymmetries in nuclear reactions with polarized cold neutrons by the integrated method of recording events at the neutron polarization switching frequency above the fundamental frequencies of the reactor power fluctuation spectrum are presented. It is shown experimentally that if the signal under investigation is characterized by the spectral density of power decreasing with increasing frequency, switching of the equipment at a higher frequency decreases the measuring error. The dependence of the error of measurements of $P$-odd asymmetry in the emission of $\gamma$ quanta in the $^{10}$B$(n,\alpha)$ $^7$Li* $\Rightarrow$ $\gamma$ $\Rightarrow$ $^7$Li(g.s.) reaction on the neutron polarization switching frequency is derived. The system described here is implemented experimentally for the first time.

Received: 17.03.2010