A. N. Golubkov

Temperature and density dependence of μ-catalysis cycling rate in dense D/T and H/D/T gas mixtures

AbstractMuon catalyzed dt fusion in dense D/T and H/D/T gas mixtures of hydrogen isotopes is studied by the MCF collaboration at JINR. The measurements were carried out with a high pressure target at the JINR phasotron in the temperature range 300-800 K at mixture densities

Facility for preparation of gas mixture in muon catalyzed fusion experiments

\simeq 0.4{\text{ and }} \simeq {\text{0}}{\text{.8 LHD}}

Investigation of the parameters of muon-catalyzed fusion in double D/T mixture at high temperature and density

. Tentative experimental results obtained by several analysis methods are presented.

First measurements of dtμ cycle characteristics in liquid H/D/T mixture

Preliminary data are first presented for the measurements of effective parameters of MCF processes in dense D/T mixtures obtained by a novel method. Results are compared with the ones obtained by the “standard” method.

Thermodesorption of vanadium-hydride-based hydrogen isotope sources

A facility is described that allows safe handling of high tritium gas activity as dozens kilocuries in a regular laboratory environment. It is used to make and deliver into the target a mixture of specific isotopic composition with the contamination requirement of 10-7 v.f. for Z>1 elements, and recover it upon completion of operation. With this facility, efforts have been accomplished to investigate into the muon catalyzed fusion on two targets – liquid tritium and high-pressure tritium types. Also, the operation range was 0.1–120 MPa for pressure and 20–800 K for temperature and the amount of tritium used was about 100 kCi. The facility showed reliability in operation without indications of radiation beyond the safety level.

Device for Investigations of Tritium Retention in and Permeation Through Metals and Structural Materials

A vast program of the experimental investigation of muon-catalyzed dt fusion was performed on the Joint Institute for Nuclear Research phasotron. Parameters of the dt cycle were obtained in a wide range of the D/T mixture conditions: temperatures of 20–800 K, densities of 0.2–1.2 of the liquid hydrogen density (LHD), and tritium concentrations of 15–86%. In this paper, the results obtained are summarized.

Status of Works on A-40-MCI-Activity Tritium Source for the Measurement of the Antineutrino Magnetic Moment

Experiments on the study of the muon catalyzed fusion (μCF) process in a double D/T mixture of hydrogen isotopes in the temperature range 300–800 K at densities 0.3–0.5 LHD are performed at the JINR phasotron. The values of the effective μCF parameters (cycling rate λc, neutron yield Yn, muon losses w) are obtained. Tentative dtμ-molecule formation rates on D2 and DT molecules (λdtμ−d and λdtμ−t) are obtained for different mixture temperatures and densities. The results obtained show that λdtμ−t increases with temperature, but its value is smaller than theoretical predictions.

Experimental Results on Muon Catalyzed dt Fusion in H/D/T Mixture

Muon catalyzed fusion in a dense triple mixture of hydrogen isotopes was investigated for the first time. The experimental method is based on the registration of neutrons from dtμ fusion by a full absorption detector in 4π geometry. The measurements were performed in H/D/T mixture at T=21 K and φ≃ 1.1 LHD using four sets of isotope concentrations. The basic parameters of the dtμ cycle (neutron yield, cycling rate and total sticking) in H/D/T mixtures obtained from neutron time distributions are presented and discussed.