The LHC, built with the cooperation of more than 2,000 physicists from 40 countries, is the world’s largest accelerator. Protons are continuously accelerated through a powerful electric field in a 27-kilometer-long circular tunnel, until they reach the speed of light. 99.9999991, and then the two proton beams collided head-on, with more than 600 million collisions per second, generating a temperature that is one hundred thousand times higher than the core of the sun! At present, the LHC has discovered the existence of the Higgs particle and the boson. After subsequent upgrades, it has been discovered that the quark strange baryon and the "flavor change" collection of five quarks exist. In the future, it may also discover the existence of supersymmetric particles and extra dimensions of particles. !

The setup for the LHC experiments is more or less fixed, the detectors sometimes get some upgrades to take advantage of newer technology or improve accuracy, which is useful, but I'm not aware of any plans for the LHC Set up a brand new experiment. Regardless, you're limited by the number of "interaction points", i.e. where the beams actually cross and collide. Adding a new accelerator would mean a massive rebuild of the accelerator.

Now to answer the second question: the production of antimatter is not the goal of the LHC. Yes, antiprotons or antineutrons can occasionally be found in the products of high-energy collisions. Yes, positrons are produced in large numbers when high-energy electrons or gamma rays hit a detector and start showering. But no one even tried to collect them.

CERN does produce small amounts of antimatter, but in a completely different place, not at the LHC. The collision of protons from the PS accelerator with a fixed metal target produces antiprotons. They are collected magnetically, cooled, and then fed into an antiproton decelerator—a special accelerator designed to slow down particles rather than speed them up. The slow antiprotons then mix with positrons from the radioactive source, creating a small amount of antihydrogen. Their numbers are so small that in a cycle they produce thousands of antihydrogen atoms, only a few of which can be successfully captured and used in experiments.

LHC’s far-fetched future circular collider plan is somewhat similar in scale to the CEPC that China is planning to build. Both are about 100KM, but China will launch the electron collider plan first, and the subsequent proton collider plan. The SPPC collision still needs to be determined based on the progress of CEPC and the scientific data obtained. Therefore, it is expected that a larger proton collider will not appear within 2040! Of course, friends who are worried about the emergence of black holes may be relieved. The LHC may not have enough energy, and a higher energy one will not appear in the short term! Congratulations to everyone, you can sleep peacefully for a few years!