The research team from Lawrence Berkeley National Laboratory accelerated the subatomic particles with one of the world's most powerful lasers, making it the highest energy state to break through the small accelerator record. Related research is published in the latest issue of Physical Review Letters.
In the experiment, the researchers accelerated the particles in a 9 cm long plasma tube to 4.25 gigaelectron volts. In such a short distance, the acceleration obtained by the particles is more than 1000 times that of the conventional particle accelerator, which refreshes the record of the laser plasma accelerator.
This result was achieved with the Berkeley Lab Laser Accelerator (BELLA). BELLA, which entered the application last year, is a laser plasma accelerator that produces the Petawa grade (10th power of 15 watts). Physicists believe that this new particle accelerator can compress a traditional particle accelerator that is several kilometers long into a device that can be placed on a table.
Traditional particle accelerators, such as the CERN's Large Hadron Collider, are up to 17 kilometers long and accelerate the particles by adjusting the electric field in the metal cavity. The limitation is that the particles can only be accelerated to 100 MeV per meter before the metal cavity fails.
According to a physicist organization network reported on December 9, the laser plasma accelerator takes a completely different approach. In this experiment, the laser pulse was emitted into a short, thin, hollow tube containing the plasma. The laser creates a channel in the plasma and captures the waves of free electrons and accelerates the electrons to a high energy state. The principle and the surfers get a little similar to the acceleration when they slide down the wavy surface.
The team's short-term goal is to accelerate the particles to 10 gigaelectron volts - which means more precise control of the plasma channel concentration. In other words, researchers need to create a structurally appropriate channel for laser pulses to pass higher-energy free electrons. Eric Limans, the first author of the paper, said the team will present new technologies for plasma channel construction in future work.
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