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Special gamma spectrograph for moon exploration

A gamma spectrometer, a special technology, applied in the field of special gamma spectrometers, can solve the problems of increased cost and technical difficulty, and the effect will not be too good, so as to achieve low cost, improve sensitivity, and overcome high cost

Inactive Publication Date: 2003-06-04
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of the outrigger structure will greatly increase the cost and technical difficulty. The cost of a single outrigger structure exceeds 200 million yuan
At the same time, since our country is exploring the moon for the first time, and the lunar resource satellite is not as heavy as Apollo 15, even if the rod structure is used at a huge cost, the effect will not be very good

Method used

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  • Special gamma spectrograph for moon exploration
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  • Special gamma spectrograph for moon exploration

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1, the special gamma spectrometer of lunar exploration, refer to figure 1 , figure 2 : The whole gamma spectrometer is composed of two parts, the main detector and the anti-coincidence detector. The main detector is provided with a crystal chamber 1, and a crystal scintillator is arranged in the chamber, and the crystal scintillator is connected with a photomultiplier tube 2. There is a crystal room 3, a crystal scintillator is arranged in the room, and a gap is arranged between the two crystal rooms, the crystal scintillator of the anti-coincidence detector is connected to the photomultiplier tube 4 of the anti-coincidence detector, and the photomultiplier tubes of the two detectors are connected simultaneously to the data acquisition circuit, meanwhile, the data acquisition circuit is provided with a microprocessor. The anticoincidence detector of this embodiment uses two smaller photomultiplier tubes instead of one larger photomultiplier tube. The cryst...

Embodiment 2

[0016] Embodiment 2: Gamma ray detector preparation process. Choose the type of crystal suitable for the detection target, we choose CsI crystal with small temperature coefficient. Choose a method to reduce the background radiation, and prepare a special anti-coincidence crystal combination form to match the main crystal. Design a special cavity to achieve a structure suitable for a special shape crystal to meet the requirements of space mechanics, physics, and environmental parameters such as impact, vibration, centrifugal, and alternating cold and heat during launch, so as to meet the goal of normal operation of instruments in lunar orbit . Design and prepare the second-class tools related to the assembly process, such as cores and release mechanisms, flaps and accessories, to meet the needs of assembly work. Choose the packaging material suitable for the optical crystal, design the number of packaging layers, and obtain the maximum matching strength under the premise of e...

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Abstract

The special gamma spectrograph for moon exploration is provided with crystal scintillator connected to photomultiplier tube and data acquisition circuit successively and features that there are main detector and anticoincidence detector with scintillator connected to one other photomultiplier tube and that the photomultiplier tube of both the main detector and the anticoincidence detector are connected to the data acquisition circuit simultaneously. The data acquisition circuit has microprocessor. The novel gamma ray detection instrument has high sensitivity, low cost, optimal background radiation inhibiting effect and increased detector effective area. The optimal scheme has CsI (Ti) crystal in anticoincidence detector and crystal scintillator of several crystals adhered together.

Description

technical field [0001] The invention relates to an astronomical observation instrument carried on an artificial satellite, in particular to a special gamma spectrometer for lunar exploration. Background technique [0002] The resources of the moon have attracted the attention of the world, and exploring the moon has always been the ideal of mankind. Carrying a gamma ray spectrometer or gamma ray detector on an artificial satellite is one of the most effective means to obtain the elements and distribution on the surface of the whole moon. Since lunar exploration is characterized by low flow and long-term observations, the probe is required to be stable. The structure of the traditional gamma ray detector is as follows: a crystal scintillator is provided, the crystal scintillator is connected with a photomultiplier tube, and then connected with a data acquisition circuit. The sensitivity of a gamma ray detector can be expressed by the following formula: [0003] S∝2*sqrt(B / ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/202
Inventor 宫一忠王楠森唐和森常进张仁健葛连生张南
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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