Two-coordinate thermal and cold neutron detector based on a 3He2 / CF4 binary mixture

摘要

The utility model relates to the field of registration of thermal and cold neutrons and is intended to study the structure of matter in a condensed state by recording diffraction spectra. A binary He / CF binary and thermal and cold neutron detector contains a sealed housing with a working (conversion) gap formed between the inlet and outlet windows, filled with a gas mixture under pressure. A gas electron multiplier (GEM) and a luminescence recording system are also located in the housing. What is new is that the luminescence registration system is made on photoelectronic multipliers (PMTs) and a well-type PMG is used, with a diamond-like carbon resistive electrode (APU), which forms, together with the coordinate information reading system, one flexible multilayer board located on the inner surface of the airtight exit window corps. The APU is applied to the printed conductive grating, and the printed conductors of the grating are placed between the holes, the grid pitch is selected as a multiple of the pitch of the holes of the GEM and extremely small, for example, 0.5 mm with the pitch of the holes of 0.5 mm, and the reading strips are placed opposite the holes of the GEM. The technical effect of the utility model is: reducing the background, in particular the gamma background, increasing the speed and stability of the count of a two-coordinate helium detector of the so-called with binary mixture He / CF. 5 ill.