Yes, the Large Hadron Collider (LHC) can be used again even if some protons are removed from it. The LHC is a circular particle accelerator located at CERN (European Organization for Nuclear Research) that is designed to accelerate and collide protons or other particles at very high energies.
The LHC operates by accelerating beams of particles, typically protons, in opposite directions around its circular ring. These particles are accelerated to nearly the speed of light and then brought into collision at designated points where detectors are located to study the resulting particle interactions.
If some protons are removed from the LHC, it does not prevent the collider from being used again. The LHC operates by continuously injecting new particles to replace the ones that are lost during the collisions or due to other factors. The beam of particles in the LHC is constantly replenished, allowing experiments to be conducted over extended periods of time.
Therefore, removing some protons from the LHC would not prevent its operation or hinder its ability to conduct experiments. The accelerator can continue to function as long as there are sufficient particles available for injection and acceleration.