Related Experiment Video
Updated: Jan 25, 2026
06:05
Additive Manufacturing-Enabled Low-Cost Particle Detector
Published on: March 24, 2023
2.4K
Simulation of Radiation Damage for Silicon Drift Detector
Yang Liu1,2, Tengfei Zhu3, Jianxi Yao4
1School of Nuclear Science and Engineering, North China Electric Power University, Beijing 102206, China. yliu@ncepu.edu.cn.
Sensors (Basel, Switzerland)
|April 25, 2019
Summary
This study investigates radiation damage in silicon drift detectors (SDD) for deep space. Geant4 simulations show neutrons cause uniform damage, while gamma rays
Area of Science:
- Nuclear Physics
- Detector Physics
- Space Science
Background:
- Silicon drift detectors (SDD) are crucial for deep space detection due to their high sensitivity and energy resolution.
- Performance degradation of SDDs in deep space environments is a significant concern.
Purpose of the Study:
- To investigate the radiation damage effects and mechanics on silicon drift detectors (SDD) in a deep-space environment.
- To analyze displacement and ionization damage from neutron and gamma irradiations.
Main Methods:
- Utilized Geant4 simulation to model radiation damage.
- Investigated irradiations with different energies of neutrons and gammas.
- Analyzed recoil atom distribution, energy, and secondary particle interactions.
Main Results:
- Neutron irradiation results in a uniform recoil atom distribution with low energy deposition.
- Gamma irradiation shows linear energy deposition with detector thickness.
- Secondary electron yield decreases as scattering angle increases.
Conclusions:
- Neutron and gamma radiation induce distinct damage mechanisms in SDDs.
- Detector epitaxial thickness is a critical parameter for anti-irradiation design.
Related Concept Videos
02:59Biological Effects of Radiation
17.7K
All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
17.7K
01:09Mutation, Gene Flow, and Genetic Drift
63.5K
In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
63.5K
01:05Instinctive Drift
684
Instinctive drift refers to the tendency of animals to revert to their innate behaviors despite repeated reinforcement. Breland and Breland demonstrated this concept in an experiment with a raccoon. The raccoon was trained to pick up two coins and place them in a container in exchange for food. Initially, the raccoon learned to associate the coins with food, making them a conditioned stimulus or a substitute for food. However, over time, the raccoon became less willing to put the coins into the...
684
03:33Genetic Drift
43.2K
Natural selection—probably the most well-known evolutionary mechanism—increases the prevalence of traits that enhance survival and reproduction. However, evolution does not merely propagate favorable traits, nor does it always benefit populations.
43.2K
01:19Drift Velocity
5.4K
The high speed of electrical signals results from the fact that the force between charges acts rapidly at a distance. Thus, when a free charge is forced into a wire, the incoming charge pushes other charges ahead due to the repulsive force between like charges. These moving charges move the charges farther down the line. The density of charge in a system cannot easily be increased, so the signal is passed on rapidly. The resulting electrical shock wave moves through the system at nearly the...
5.4K
01:21Gas Chromatography: Types of Detectors-I
1.5K
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
1.5K