引力谱仪GRANIT的超冷中子源
A source of ultra-cold neutrons for the gravitational spectrometer GRANIT
摘要:
介绍了GRANIT重力谱仪专用高密度超冷中子源的研制现状。该源利用冷中子在超流氦中的超热转换为UCN。试验表明,液体内部产生的UCN可以被提取到真空中。此外,测试了专用的中子选择通道,以保持高的初始密度,并仅提取具有20 cm/s垂直速度分量的中子用于谱仪。对于光谱仪来说,这个新的源将具有0.18 cm-3(m/s)-3的相空间密度。
英文摘要:
We present the status of the development of a dedicated high density ultra-cold neutron (UCN) source dedicated to the gravitational spectrometer GRANIT. The source employs superthermal conversion of cold neutrons to UCN in superfluid helium. Tests have shown that UCN produced inside the liquid can be extracted into vacuum. Furthermore a dedicated neutron selection channel was tested to maintain high initial density and extract only neutrons with a vertical velocity component 20 cm/s for the spectrometer. This new source would have a phase-space density of 0.18 cm-3(m/s)-3 for the spectrometer.
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