...from : http://www.bbc.com/news/science-environment-32590036 By Jonathan Webb, Science reporter, BBC News - begin quote - "LHC restart sees first collisions The Large Hadron Collider has smashed protons together for the first time since early 2013. The low-energy collisions, part of preparations for the next round of experiments, began on Tuesday morning. Proton beams circled the LHC and collided at an energy of 450 gigaelectronvolts (GeV) per beam. The aim for this second run of the LHC, following its planned two-year shutdown for repairs and improvements, is to stage collisions at 7,000 GeV per beam. A key milestone was reached on Easter Sunday when proton beams once again did full circuits of the LHC's 27km subterranean circle. Now the two beams have been steered into each other - another important step in the gradual restart of the world's biggest particle accelerator.' - end quote - ...much more at : http://www.bbc.com/news/science-environment-32590036
They are starting off at very low levels and won't get into the 12 TEV until June from what I read. So we will have to wait until then to see what they can create.
A fascinating article on the LHC recommissioning https://www.physicsforums.com/insights/lhc-part-2-commissioning-2/
I guess those who designed this didn't know about all of those things that could happen when it was operating and the problems that happened when it went online. So now more time,2 years, and money, almost another billion, went into this machine to try and take care of problems that weren't known at the time it was built. I wonder why the physicists didn't see these problems coming when they designed it to begin with? Fermi Lab didn't encounter anything like this when it was designed so what went wrong with the new design. I hope now that all of the problems are exorcised for good this repair.
Really? This is the largest (and probably the most complicated) machine in the world - I am sort of amazed the damn thing works at all!
When they built Fermi Lab nothing went wrong. When they built the space shuttle nothing went wrong. Those were two of the most complex machines ever built before the LHC and they had no problems.
The space shuttle was built and was not any problem until once the lifting booster rockets had problems and when something happened that we will never know how it happened took place at over 60,000 feet in the atmosphere. It might have been human error on both counts but we know the space shuttle wasn't redesigned for any problems. So the shuttle was built right and only had other problems that it couldn't have prevented when humans make errors.
Are you sure? Maybe nothing that you heard. http://www.fnal.gov/pub/today/Magnetupdate.html On Tuesday, March 27, structural supports to a Fermilab-built quadrupole magnet, one of an "inner triplet" of three focusing magnets, failed a high-pressure test in the tunnel of the LHC accelerator under construction at CERN. The force generated in the pressure test broke the supports in magnet Q1 that hold the magnet's cold mass in place inside the cryostat, the magnet's outer metal jacket. The support structure broke because it was not designed to withstand the amount of longitudinal force applied during the pressure test. Redesign and repair Since March, teams at CERN and Fermilab have worked closely together to identify the cause of the failure and to identify any other potential problems with U.S.-furnished components. The teams have identified several potential solutions. I'm sure there were insulation tile problems from the word go. Then of course the foam problem from the external fuel tank.
I don't think there was much poor planning involved. The plan was to shutdown at the end of the first run, turnaround the machine [repairs], make any improvements that the first run suggested, and do the work required to double the beam energy for future experiments. That's how I read it. Awesome experiment.
Reagan was never interested in science beyond what he thought we could gain militarily from the research. I would have been shocked if it would have been built.
How much further would we have been now in our research, knowledge and data, if it had been completed? From memory it was more than twice the ring diameter as LHC and was going to turn out around 20TeV....... Could it be ever be completed?
When they started digging the tunnel ring it was already 4 years and nothing was being built for the actual machine in Texas. Digging for 4 years and spending 4 billion just to dig was probably why they shut the project down. Now there's a very long tunnel worth nothing to anyone. That's why he stopped the project before more billions was wasted on things other than the machine itself like graft and theft of the money .
