Pulsed neutron emission time detector

Abstract

The invention discloses a pulsed neutron emission time detector which comprises an optical fiber bundle, the front end of the optical fiber bundle is connected with a scintillator, the rear end of the optical fiber bundle is connected with a photomultiplier, the photomultiplier is externally and annularly sleeved with a light shielding shell, the rear end of the optical fiber bundle is provided with a clamping ring, and the circumferential exterior of the clamping ring is connected with a gland. The gland is in threaded connection with the light shielding shell so that the clamping ring can tightly hold the optical fiber bundle and force the rear end of the optical fiber bundle to be continuously coupled with the photomultiplier. A lead shielding sleeve is arranged outside the gland and the light shielding shell, and the optical fiber bundle extends in the direction away from the photomultiplier so that the scintillator can be away from the photomultiplier. The beneficial effects are that noise signals of x-rays and gamma-rays in the photomultiplier are greatly reduced, and the signal-to-noise ratio is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of neutron detection, in particular to a pulsed neutron emission time detector. Background technique [0002] A scintillation detector made of a combination of a scintillator, a light-collecting component, and a photoelectric converter is a common radiation detector. When particles enter the scintillator, the atoms or molecules of the scintillator are excited to produce fluorescence. The light-collecting component Make the fluorescence emit to the photoelectric converter and emit photoelectrons, and then the photoelectrons can be converted into electrical signal output directly or after being multiplied. [0003] When pulsed neutrons are used as the radiation source, a scintillator is required to convert the neutron signal into an optical signal. Since the pulsed neutron source is usually accompanied by other radiation such as x-rays and gamma rays, and the PMT (photomultiplier tube) is Both radiation and g...

AI Technical Summary

Problems solved by technology

[0003] When pulsed neutrons are used as the radiation source, a scintillator is required to convert the neutron signal into an optical signal, because the pulsed neutron source is usually accompanied by other radiation such as x-rays and gamma rays, and the PMT (photomultiplier tube) is Both radiation and gamma rays respond, so the resulting noise signal affects the time interpretation of the measured signal

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