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
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Publication Date
- 2003-06-04
- Estimated Expiration
- Not applicable · inactive patent
Smart Images
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Abstract
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 / ...
Examples
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...