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CERN's Pioneering Mini-Accelerator Passes First Test (nature.com)
An anonymous reader quotes a report from Nature: An experiment at CERN has demonstrated a new way of accelerating electrons to high energies -- one that could dramatically shrink the size of future particle accelerators and lower their costs. The technique is the latest entrant in a hot race to develop a technology called plasma wakefield acceleration. The method uses waves in plasma, a soup of ionized atoms, to push electrons to ever-higher energies over distances much shorter than those required in today's particle accelerators. Several laboratories have demonstrated plasma wakefield acceleration using two different approaches; most teams use laser beams to create the plasma waves needed. The latest work is the first to show that protons can also induce the waves and achieve electron acceleration -- a technique that may have advantages over the others because protons can carry high energies over long distances.
In this case, researchers diverted protons that would usually be fed into the Large Hadron Collider (LHC) at CERN, Europe's particle-physics lab near Geneva, Switzerland, and instead inserted them into the wakefield accelerator, called the Advanced Wakefield Experiment (AWAKE). The machine worked as expected and created a consistent beam of accelerated electrons. "That, for us, was a major achievement," says Matthew Wing, a physicist at University College London, who is deputy spokesperson for AWAKE. "It essentially says that the method works, and it's never been done before." The work is described in Nature on 29 August.
In this case, researchers diverted protons that would usually be fed into the Large Hadron Collider (LHC) at CERN, Europe's particle-physics lab near Geneva, Switzerland, and instead inserted them into the wakefield accelerator, called the Advanced Wakefield Experiment (AWAKE). The machine worked as expected and created a consistent beam of accelerated electrons. "That, for us, was a major achievement," says Matthew Wing, a physicist at University College London, who is deputy spokesperson for AWAKE. "It essentially says that the method works, and it's never been done before." The work is described in Nature on 29 August.
I suspect Obama had very little control over budgets while he was in office. Congress has the power of the purse. He had some influence over congress for the first two years. The other 6 was pretty much congress doing the opposite of whatever came out of his mouth.
Your right when you say Obama had very little control over the budget but that also applies to all of his predecessors and the current President. And it's about time all those who are endlessly badgering and protesting the executive branch realize the President has very little real authority to change anything of importance. A President doesn't wield the power of an Emporer. Even as Commander in Chief the President can declare war and deploy the military but Congress can override that decision after 90 days by defunding the military. A President has veto power but even that decision can be overridden by Congress. And Presidents will only invoke a veto if they are 100% sure that veto would not be overridden by Congress. Having a veto overridden makes a President look weak. Don't like US immigration policies? Blame Congress who are the ones who passed the current laws. All Trump has did is enforce the laws and regulations voted into law by Congress. President can issue Executive Orders but they can also be overridden by Congress or the court system. Obama used an Executive Order to protect the DACA immigration program. At the time this decision came very close to violating the separation of powers. Trump did not cancel the DACA program he turned the program over to Congress so they could replace the executive order with a legal constituted law. He gave Congress more than a year for Congress to act and they did nothing. Presidents can't fuck up a country only Congress is capable of that and they have been doing a bank up job. They have no term limits. They have no limits on financial contributions to their campaigns. They cannot be forced to testify in public when accused of wrong doing. They love to summon people to Congress for public enquiries but they are protected from being grilled in public over their statements and actions. Over the years they have consolidated power in the various committees and sub-committees to ensure no new Congressman have any real power to effect any thing important. They always attach some non-related issues onto any important peace of legislation and are perfectly willing to harming the country to gather as much pork as possible for all the people who invested millions of dollars getting them elected. And this type behavior comes from both the Democrats and Republicans in equal measure. And they are experts at focusing the raging mobs attention on the executive branch to ensure nobody realizes that they are the true source of the political dysfunction and it doesn't matter who the President is.