The intense electron beam can have many purposes.

"Researchers have developed the most powerful ultrashort electron beam to date using a novel laser shaping technique. This unlocks new experiments in fields from astrophysics to quantum chemistry. (Artistic concept.) Credit: SciTechDaily.com" (ScitechDaily, SLAC Just Fired the Most Intense Submicron Electron Beam in History – Here’s What It Can Do)

Intense electron beams can act as a qubit carrier. They can also act as thermal pumps and weapons. The Tesla's death ray was probably the cathode ray. And the thing that this kind of electron beam makes when it impacts cells is that it destroys the genomes. The electron beam has a higher energy level than photons. And that makes electron beams suitable for welding systems. 

The electron beams are suitable for antimatter creation. 

When a high-power electron beam hits a thin gold layer it turns some electrons into positrons. It's possible. To make a compact antimatter bomb. Using a cathode tube. The capacitors can give energy impulses to the cathode and anode. 

If the speed of the electron flow is turning high and there is a thin cold layer between the cathode and anode that makes the Teller's bomb or antimatter bomb true. It's possible that the antimatter can be created by conducting lightning into the statues. If they are covered using a thin cold layer. Theoretically, the antimatter weapon can be the jam jar. There is the cathode and anode. On the anode side can be the extremely powerful magnet that makes those electrons move faster. 

The same technology. That was used in Teller's bomb can be used in the antimatter rockets. The system shoots electrons through the gold membrane. That creates the antimatter electrons.

That system shoots against electrons. The system can make those impacts in the same chambers. That normal rockets use. The antimatter can give a very high push if annihilation happens in the propellant or medium like water. In that case, antimatter can operate as the "turbo boost" for the rockets. 

The problem with electron beams is that they should stand in the form. When we think about things like energy flows it's possible to create an electron beam where the outer structure travels slower and lasers accelerate its internal electrons. In that system, the electrons in the internal electron beam act like a thermal pump that transfers energy out of the internal structure of the electron beam.  That is one way to make an electron beam that can travel over long distances. It is also possible to shoot protons inside the electron beam. But that system makes the electron beam less inaccurate. 

https://scitechdaily.com/slac-just-fired-the-most-intense-submicron-electron-beam-in-history-heres-what-it-can-do/