According to the British "New Scientist" magazine website on August 18 (Beijing time), Alexander Federov of the Russian National Nuclear Research University and his colleagues in the forthcoming issue of the "Physical Review Letters" research paper According to their calculations, a powerful laser can accelerate the first positive and negative electron pairs to a very high speed, allowing them to emit light. This light then “works together†with the laser to produce more electron pairs. This is precisely a kind of prophecy of quantum mechanics in the 1930s.
The principle of uncertainty in quantum mechanics means that space is not really empty. On the contrary, the random fluctuations of the universe make it a "pot of hot soups of particles," in which electrons and their corresponding antimatter positrons are located. Under normal circumstances, once these particles hit their anti-matter, they will be instantly annihilated and invisible to each other. We have no time to see what it is like. However, physicists predicted in the 1930s that a very powerful electric field could make these "ghost particles" appear. Because these particles have opposite charges, the electric field can push them in the opposite direction, keeping them apart and not all together.
Lasers that generate strong electric fields are ideal candidates for this task. In 1997, physicists at the Stanford Linear Accelerator Center in the United States used lasers to successfully create positive and negative pairs of electrons, but only one positive and negative electron pair was generated at a time. Now, scientists have calculated that the next generation of more powerful lasers can capture millions of positive and negative electron pairs by initiating a chain reaction.
The Russian team's calculations show that for a laser that can focus approximately 1026 watts of energy on a square centimeter range, such a chain reaction can effectively convert its laser into millions of positive and negative electron pairs.
The co-author of the research paper, George Cohen of the German Mapu Institute for Quantum Optics, said that the first laser with such a powerful function might be built by the European Super Laser Facility project in 2015, but it will take several years to complete. The necessary upgrade can achieve 1026 watts of energy per square centimeter of focus.
According to Kirk McDonald of Princeton University in the United States, the ability to produce a large number of positrons is very useful for particle accelerators, such as the proposed new international linear collider, which can smash electrons and positrons together with extremely high energy. The high energy scene of the moment of the birth of the universe.
The current standard method for mass production of positrons is to ignite a high-energy electron beam on a piece of metal to produce positive and negative pairs of electrons. Some experts believe that the cost of producing a positron using a chain reaction to an ultra-strong laser is too high.
The principle of uncertainty in quantum mechanics means that space is not really empty. On the contrary, the random fluctuations of the universe make it a "pot of hot soups of particles," in which electrons and their corresponding antimatter positrons are located. Under normal circumstances, once these particles hit their anti-matter, they will be instantly annihilated and invisible to each other. We have no time to see what it is like. However, physicists predicted in the 1930s that a very powerful electric field could make these "ghost particles" appear. Because these particles have opposite charges, the electric field can push them in the opposite direction, keeping them apart and not all together.
Lasers that generate strong electric fields are ideal candidates for this task. In 1997, physicists at the Stanford Linear Accelerator Center in the United States used lasers to successfully create positive and negative pairs of electrons, but only one positive and negative electron pair was generated at a time. Now, scientists have calculated that the next generation of more powerful lasers can capture millions of positive and negative electron pairs by initiating a chain reaction.
The Russian team's calculations show that for a laser that can focus approximately 1026 watts of energy on a square centimeter range, such a chain reaction can effectively convert its laser into millions of positive and negative electron pairs.
The co-author of the research paper, George Cohen of the German Mapu Institute for Quantum Optics, said that the first laser with such a powerful function might be built by the European Super Laser Facility project in 2015, but it will take several years to complete. The necessary upgrade can achieve 1026 watts of energy per square centimeter of focus.
According to Kirk McDonald of Princeton University in the United States, the ability to produce a large number of positrons is very useful for particle accelerators, such as the proposed new international linear collider, which can smash electrons and positrons together with extremely high energy. The high energy scene of the moment of the birth of the universe.
The current standard method for mass production of positrons is to ignite a high-energy electron beam on a piece of metal to produce positive and negative pairs of electrons. Some experts believe that the cost of producing a positron using a chain reaction to an ultra-strong laser is too high.
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