Last month, a group collaborating across four national laboratories completed the first successful tests of a superconducting coil in preparation for the future high-luminosity upgrade of the Large Hadron Collider, or HL-LHC. These tests indicate that the magnet design may be adequate for its intended use. Physicists, engineers and technicians of the U.S. LHC Accelerator Research Program (LARP) are working to produce the powerful magnets that will become part of the HL-LHC, scheduled to start up around 2025. The plan… More »
Thanks to science, we get more for less. We get more features on a newer car model, more data and information stored on a computer, and all for the same or lowered cost. That same principle applies to accelerator R&D, where improving the performance and lowering the cost can help open doors to new ideas. The Department of Energy recently named Fermilab physicist and 2013 Peoples Fellow Anna Grassellino as a recipient of the prestigious Early Career Research Award for… More »
New projects bring to Fermilab new technological challenges and new solutions. One of those new technologies is the electrostatic septum made with very thin tungsten foils. Electrostatic septa are used in slow beam extraction to separate the circulating and extracted beams. At Fermilab, slow extraction has traditionally taken place as the beam is sent from the Main Injector to the Switchyard. In the standard technology, the septum plane is made as a layer of 100-micrometer tungsten wires. A challenge of the Mu2e project is slow extraction of protons with average beam power of 8 kilowatts. One of the solutions is the new design of the septum. The photo shows a mock-up for studying 25-micrometer tungsten foils under measurement with the laser scanning microscope at the Technical Division.
The answer is “chopper.” This is one of two chopper schemes under development for the Project X Injector Experiment, or PXIE. Particle beams are made of series of particle packets called bunches. The chopper allows scientists to prescribe specific bunch patterns for a particle beam, dictating which bunches can remain in the beam and which have to go. As a particle beam travels down the length of the chopper, each of the rectangular plates lined up along the chopper’s axis sets up an electrostatic pulse that kicks the bunch farther and farther away from the beamline, chopping it out.