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Large-area concentric-circles-shaped cylindrical double-surface silicon drift detector and design method thereof

A technology of a silicon drift detector and a design method, applied in the field of deep space exploration, can solve the problems of small SDD unit area and high cost of splicing arrays, and achieve the effects of reducing physical and mechanical stress, improving energy resolution, and reducing energy consumption

Pending Publication Date: 2018-11-30
李正
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Problems solved by technology

[0009] Aiming at the problems existing in the prior art, the present invention provides a large-area concentric cylindrical double-sided silicon drift detector and its design method, which overcomes the problems of small SDD unit area and high cost of splicing arrays in the world, and at the same time realizes the soft X-ray high energy resolution 2.0%@5.9keV beyond

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  • Large-area concentric-circles-shaped cylindrical double-surface silicon drift detector and design method thereof
  • Large-area concentric-circles-shaped cylindrical double-surface silicon drift detector and design method thereof
  • Large-area concentric-circles-shaped cylindrical double-surface silicon drift detector and design method thereof

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[0045]In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0046] figure 1 The linear shape SDD structure and basic working principles are shown. The collecting electrode of SDD is an anode (n+Anode, N-type silicon wafer as substrate) whose area can be much smaller than that of SDD. Appropriate voltage gradients are added to the cathodes (p+) on both sides of the SDD, so that the SDD can be fully depleted and a drift electric field is provided in the middle of the silicon wafer of the SDD. This electric field can make photons (such as X-rays, etc.) generate electrons in the SDD to drift laterally to the collecting anode, such as figure 1 indicated by the arrow.

[0047] The in...

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Abstract

The invention belongs to the technical field of deep space detection, and discloses a large-area concentric-circles-shaped cylindrical double-surface silicon drift detector and a design method thereof. The design method of the large-area concentric-circles-shaped cylindrical double-surface silicon drift detector comprises the following steps: determining electric potentials of the front surface and the rear surface of the silicon drift detector; calculating an optimal drift path from a point S1 to a point S2 when a current carrier drifts in the silicon drift detector by using a mathematic variational method; and determining a constant drift electric field of the optimal drift path. An SDD current carrier drift behavior law and heavy doping electrode growth are analyzed, a double-surface electrode which has double-surface correlation, not only maintains a uniform electron drift electric field, but also provides a smooth drift track is designed from a new structure, novel process integrated design and a theoretical calculating method for the corpuscular property of light, and a creative design manufacturing mode which is high in energy resolution ration on soft X-ray particles with the strength being 0.5-15 keV and effectively collects SDD is established.

Description

technical field [0001] The invention belongs to the technical field of deep space detection, in particular to a large-area concentric cylindrical double-sided silicon drift detector and a design method thereof. Background technique [0002] At present, the existing technologies commonly used in the industry are as follows: [0003] X-ray pulsars are remnants of the evolution, collapse, and supernova explosion of massive stars. They have an extremely stable rotation period (stability is better than 10-19s / s), and are known as the most accurate astronomical clock in nature. , deep space exploration and interstellar flight spacecraft provide high-precision navigation information such as position, velocity, time and attitude, and pulsar-based navigation is a new type of navigation system that can never be destroyed. Compared with GPS and Beidou navigation methods, the new system pulsar navigation technology has incomparable advantages in the application of near-ground and deep...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50H01L31/115
CPCH01L31/115G06F30/20
Inventor 李正刘曼文
Owner 李正
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