For investigation of the cosmic muon scattering tomography (MST) concept at NRC ‘‘Kurchatov Institute’’—IHEP the large-scale setup has been constructed. The setup includes 8 planes ($$3\times 3$$ m$${}^{2}$$ each) of 3-layer drift tube chambers, the total quantity of drift tubes is 2304. The drift tubes were filled with gas mixture Ar $$+$$ 7$${\%}$$ CO$${}_{2}$$ at 0.5 bar overpressure on April 2011 and the gas system was closed. Up to now the gas mixture was not refreshed but the chambers are still working. We are presenting long term observation of the drift chambers’ behavior and some performances of the setup for this long period.

The design and the procedures for assembling and testing drift tubes 15 mm in diameter made of 125-µm-thick Mylar film with a double-sided aluminum coating are presented. The technology of assembling three-layer chambers made of such tubes with a length of up to 2.5 m intended for use in experiments at the accelerator facility at the Institute for High Energy Physics of the National Research Center Kurchatov Institute—IHEP is described. Some results obtained during detection of cosmic muon tracks in the chambers are presented.

The design, procedure of assembling, and tests of drift tubes with the diameter of 30 and 15 mm made of mylar film 125 μm thick covered with aluminum from both sides are presented. The assembly technology of three-layer chambers of such tubes is described and some results showing the technical performance of the chambers are given.

The data-acquisition system of a muon tomograph based on the on-chamber electronics is described. Its advantages over the previously used system based on the electronics made to the VME-9U standard are considered. The hardware component and the software of the new data-acquisition system are presented.

The on-chamber electronic system of a muon tomograph is described. The system is composed of an MT-48 48-channel front-end module and an RMT-48 fan-out module for the multiplication of control signals. The data-acquisition structure for the Muon Tomograph device is presented.

Описана система накамерной электроники мюонного томографа: 48-канальный регистрирующий модуль МТ-48 и разветвитель сигналов канала управления РМТ-48. Приведена организация сбора информации установки “Мюонный томограф”.

Описана конструкция дрейфовой камеры, состоящей из трех слоев тонкостенных (0.125 мм) прецизионных лавсановых трубок. Двадцать шесть таких камер площадью от 1 ? 1 до 2.5 ? 2 м2, включающих 4392 дрейфовые трубки, были изготовлены для экспериментов на ускорителе ИФВЭ с энергией 70 ГэВ. Приведены описания конструкции и процедуры сборки, а также некоторые результаты проверки камер.

The design and assembling procedure of a precision drift tube housed in a Mylar pipe are described. The technology for manufacturing drift tube bodies from a 125-μm-thick Mylar film with an aluminum coating evaporated on both sides of it is introduced. The test procedures and results demonstrating the performance characteristics of the drift tubes are presented.

A blind analysis searching for the decay B-s(0) -> mu(+)mu(-) has been performed using proton-proton collisions at a centre-of-mass energy of 7 TeV recorded with the ATLAS detector at the LHC. With an integrated luminosity of 2.4 fb(-1) no excess of events over the background expectation is found and an upper limit is set on the branching fraction BR(B-s(0) -> mu(+)mu(-)) <2.2(1.9) x 10(-8) at 95% (90%) confidence level. (C) 2012 CERN. Published by Elsevier B.V. All rights reserved.

The Muon Tomograph setup with a 3 × 3 m 2 area of overlapping is described. This setup has been designed to investigate the feasibility of detecting hidden objects with different densities using cosmic muons. Its main performance characteristics are presented.