Can laser replace synchrotron for accelerating electrons?

Particle acceleration no longer needs accelerators of several kilometers in size. Through the use of laser technology, particle acceleration can be carried out within a few centimeters. The new Laser Wake Wave Field (LWFA) technology uses a single laser pulse to accelerate electron beams to the energy levels achieved by large devices. A team led by Simon Hooker of Oxford University demonstrated an improved LWFA technique that utilizes a laser pulse array rather than a single pulse. This multi-pulse combination is expected to accelerate thousands of times per second electron beam relative to the single pulse mode, thereby expanding the possibility of application.

Using LWFA technology, short, strong laser pulses build the plasma density wave. The electron is to use such a wave to obtain energy, just as the surfer gets the energy from the ocean wave. The laser has enough energy to drive this process, but only a few times per second. Recent research shows that low-energy laser pulse arrays can form density waves for continuous acceleration. Such a pulse array can be generated at a frequency of several kilohertz. Hooker and his team have validated the process experimentally for the first time.

Through Appleton's high-power laser unit, the team reconfigured the laser to emit a laser pulse array with an interval of 100 femtoseconds. The plasma was injected into the plasma and the research team got the plasma wave. Although in this experiment did not verify the plasma wave acceleration electrons. However, the researchers expect the optimized laser to produce energetic beams from synchrotrons when the repetition rate reaches kilohertz.

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