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Water Cerenkov light high-energy particle detector

A high-energy particle and detector technology, which is applied in the detector field of high-energy gamma astronomy and cosmic ray physics detection, can solve the problem that the detector does not have the ability to distinguish the type of particles, the number of particles and the measurement of particle energy are inaccurate, and the charged particles cannot be distinguished. particles and other problems, to avoid position dependence, reduce production costs, and eliminate measurement errors.

Active Publication Date: 2013-03-20
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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AI Technical Summary

Problems solved by technology

[0011] There is also a method for detecting water Cherenkov light, which is to directly hang a series of photomultiplier tubes into a series of photomultiplier tubes in the ice layer of the deep sea or Antarctica (under the ice surface or the water surface) to detect the water Cerenkov light. Observation, but the structure of this method is too large, very expensive, and the light collection efficiency is also very low, the measurement results are not accurate
[0012] Therefore, the current water Cherenkov light detector has the disadvantages of inaccurate measurement of particle arrival time, particle number and particle energy, especially the detector does not have the ability to distinguish particle types, and cannot distinguish charged particles entering the detector such as: Electrons, muons, hadrons, and these functions are the most critical technical indicators for testing the performance of a detector

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Embodiment approach 1

[0065] The structure of the water Cerenkov optical high-energy particle detector described in the present invention: as attached Figure 4 Shown: 1 is a lake, a reservoir or a man-made water body, and the water Cherenkov optical high-energy particle detector is placed on a fixed frame therein. 2 is the top of the water Cherenkov optical high-energy particle detector, 3 is the bottom of the water Cerenkov optical high-energy particle detector, and 4 is the side of the water Cerenkov optical high-energy particle detector.

[0066] The shell of the water tank or water bag of the Cerenkov optical high-energy particle detector is composed of three parts: 5 is a layer of light-shielding layer to prevent light leakage of the detector; 6 is the wall of the water tank or water bag, which can seal pure water or clean water , to prevent deterioration of water quality; 7 is tyvek film or other reflective materials. 16 is a wavelength conversion optical fiber distributed uniformly or radi...

Embodiment approach 2

[0072] In Embodiment 1, the tyvek film of the inner layer of the water tank or water bag has good reflectivity, and when the water quality in the detector is good enough (such as the light attenuation length is greater than 15 meters), it is also possible not to use the wavelength conversion fiber, However, if a PMT with a diameter of about 10 cm is used to directly collect Cerenkov light in a water tank or a water bag, the detection rate for a single particle incident will be reduced from 80% to about 30% when a wavelength conversion fiber is used, but for multiple particles Or the measurement of high-energy particles, the impact is not very great. In view of the consideration of saving production costs and the actual experimental requirements, the second method has also become a feasible choice.

[0073] When the wavelength conversion fiber is not used, the structure of the water Cerenkov optical high-energy particle detector: as attached Figure 5Shown: The difference from ...

Embodiment approach 3

[0079] This embodiment is mainly designed for high-altitude cold climates, and a constant temperature device is added on the basis of Embodiment 1 or Embodiment 2 to avoid freezing.

[0080] In this embodiment, the overall size of the Cerenkov optical high-energy particle detector and the size of its internal components are as follows:

[0081] The side length of the water Cherenkov light particle detector can be 0.5 to several meters; the thickness is 0.1 to 1 meter. The wall thickness of the water tank or water bag is 0.1 to 2 cm. The diameter of the optical fiber is 0.5-3 mm, and the length of each fiber is 0.2-2 meters. It can be adjusted according to the measurement accuracy of the arrival time of the detector. The optical fiber is evenly arranged in the water tank or water bag, and the distance is 1 cm-tens of cm. It can be flexibly adjusted according to the performance of the PMT such as magnification and the requirements for the number of incident particles or energy ...

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Abstract

The invention relates to a water Cerenkov light high-energy particle detector which comprises a Cerenkov light generation device, a light collection device, a photoelectric conversion device and a data acquisition device. The light collection device and the photoelectric conversion device are mounted in the water Cerenkov light high-energy particle detector. When velocities of charged particles entering the detector are greater than a phase velocity of light in water, Cerenkov light can be generated. The generated water Cerenkov light is collected by the light collection device in the detector, and passes through the photoelectric conversion device; and light signals can be converted into electrical signals. The output electrical signals after undergoing analog-digital conversion are stored and recorded by the data acquisition device finally. The water Cerenkov light high-energy particle detector is mainly used for detecting the particle quantity and the energy of relativistic particles, and applicable to the research of high-energy gamma astronomy and high-energy cosmic rays.

Description

technical field [0001] The invention belongs to particle detection technology, in particular to a detector for high-energy gamma astronomy and cosmic ray physics detection. Background technique [0002] Traditional high-energy particle detectors usually use scintillator detectors in order to measure the arrival time of charged particles and the number of charged particles. When charged particles pass through the scintillator, the atoms and molecules in the scintillator will fluoresce during the de-excitation process, and the amount of light is proportional to the number of charged particles. Using this principle, it is possible to measure the number of charged particles entering the detector. However, scintillator detectors are expensive (about 20,000 RMB per square meter), so they cannot meet the needs of large-area production. In the field of large-scale detectors, the water Cherenkov detector, which has been successfully developed in recent years, has begun to partially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/204
Inventor 陈鼎
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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