Initial signal fan-out device of neutron spectrometer

Abstract

The invention relates to an initial signal fan-out device of a neutron spectrometer, which comprises an initial signal fan-out module in an electronics system, in the control station, a starting signal fan-out module carries out fan-out on a starting signal, and after first-stage long-distance driving processing, the starting signal is transmitted to a far-end electronics system through a long-distance cable; in the electronics system, the initial signal is further fan-out to each electronics channel through a signal receiving and digitizing node to complete second-stage fan-out; and the long distance is greater than or equal to 100m. According to the invention, an analog and digital combined two-stage precise fan-out method is used to complete precise global synchronous fan-out of an initial signal to an electronics system. The device has the advantages of multi-channel fan-out, high timing precision, high synchronization precision and the like, so that an electronic system can accurately measure output signals of a detector, and accurate time information and energy information of nuclear interaction and nuclear reaction of neutrons and substance atomic atoms are obtained.

Description

technical field [0001] The invention relates to a neutron spectrometer initial signal fan-out device, which belongs to the neutron spectrometer data collection, test measurement and synchronous timing technology for particle physics experiments. Background technique [0002] In a spallation neutron source, protons strike a metal tungsten target at a certain frequency, producing spallation neutrons. The neutron spectrometer uses the neutrons produced by the spallation reaction to interact with the sample, and uses the neutron detector to detect the neutrons after the action, so as to conduct neutron experiments. [0003] The neutron spectrometer on the spallation neutron source adopts neutron time-of-flight technology, and the data acquisition system needs to accurately know the time zero point of each proton pulse hitting the target, so as to accurately measure the neutron time-of-flight. Therefore, the signal associated with the target proton bunch is used as the initial s...

AI Technical Summary

Problems solved by technology

[0009] In this way, the number of dedicated hardware fan-out channels based on optical fiber links is low, and for electronic systems with a large number of channels, a large number of cables and optical fiber transceivers are required, which is not easy to install and maintain

At the same time, in order to ensure the synchronization of the initial signal, the fiber length of each channel needs to be manually calibrated in advance to ensure equal length, which undoubtedly greatly increases the workload

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