news from the lab 2015

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Materials Science - Physics - 08.09.2015
The key to charging a lithium-ion battery rapidly
The key to charging a lithium-ion battery rapidly
Researchers reveal the reasons for these properties in a new study. During the charge and discharge process for this kind of battery, lithium ions need to move between the two electrodes. As it turns out, the rapid charging of these batteries is down to the fact that, at a higher charging voltage, the lithium ions are distributed evenly across the volume of the particles that make up the battery electrode, which contains lithium.

Physics - 01.09.2015
ATLAS and CMS experiments shed light on Higgs properties
ATLAS and CMS experiments shed light on Higgs properties
Three years after the announcement of the discovery of a new particle, the so-called Higgs boson, the ATLAS and CMS Collaborations present for the first time combined measurements of many of its properties, at the third annual Large Hadron Collider Physics Conference (LHCP 2015). By combining their analyses of the data collected in 2011 and 2012, ATLAS and CMS draw the sharpest picture yet of this novel boson.

Physics - 17.08.2015
Precise comparison of light nuclei and antinuclei
Precise comparison of light nuclei and antinuclei
The ALICE experiment at the Large Hadron Collider (LHC) at CERN has made a precise measurement of the difference between ratios of the mass and electric charge of light nuclei and antinuclei. The result, published today , confirms a fundamental symmetry of nature to an unprecedented precision for light nuclei.

Physics - Chemistry - 12.08.2015
The BASE experiment at CERN compares protons and antiprotons with high precision
The BASE experiment at CERN compares protons and antiprotons with high precision
The Baryon Antibaryon Symmetry Experiment (BASE ) at CERN 2 's Antiproton Decelerator (AD), reports the most precise comparison of the charge-to-mass ratio of the proton to that of its antimatter equivalent, the antiproton. The charge-to-mass ratio - an important property of particles - can be measured by observing the oscillation of a particle in a magnetic field.

Physics - 14.07.2015
CERNís LHCb experiment reports observation of exotic pentaquark particles
CERNís LHCb experiment reports observation of exotic pentaquark particles
LHCb experiment at CERN's Large Hadron Collider has reported the discovery of a class of particles known as pentaquarks. "The pentaquark is not just any new particle," said LHCb spokesperson Guy Wilkinson. " It represents a way to aggregate quarks, namely the fundamental constituents of ordinary protons and neutrons, in a pattern that has never been observed before in over fifty years of experimental searches .

Physics - 03.06.2015
LHC experiments are back in business at a new record energy
LHC experiments are back in business at a new record energy
Today, CERN 's Large Hadron Collider (LHC) started delivering physics data for the first time in 27 months. After an almost two year shutdown and several months re-commissioning, the LHC is now providing collisions to all of its experiments at the unprecedented energy of 13 TeV, almost double the collision energy of its first run.

Materials Science - Physics - 06.03.2015
Heat Waves in Graphene
Heat Waves in Graphene
EPFL researchers have shed new light on the fundamental mechanisms of heat dissipation in graphene and other two-dimensional materials. They have shown that heat can propagate as a wave over very long distances. This is key information for engineering the electronics of tomorrow. In the race to miniaturize electronic components, researchers are challenged with a major problem: the smaller or the faster your device, the more challenging it is to cool it down.

Physics - 02.03.2015
The first ever photograph of light as both a particle and wave
The first ever photograph of light as both a particle and wave
Light behaves both as a particle and as a wave. Since the days of Einstein, scientists have been trying to directly observe both of these aspects of light at the same time. Now, scientists at EPFL have succeeded in capturing the first-ever snapshot of this dual behavior. Quantum mechanics tells us that light can behave simultaneously as a particle or a wave.

Physics - 11.02.2015
CERN experiment brings precision to a cornerstone of particle physics
CERN experiment brings precision to a cornerstone of particle physics
The COMPASS experiment at CERN reports a key measurement on the strong interaction. The strong interaction binds quarks into protons and neutrons, and protons and neutrons into the nuclei of all the elements from which matter is built. Inside those nuclei, particles called pions made up of a quark and an antiquark mediate the interaction.

Physics - 04.02.2015
Risky slopes: evaluating the link between snowfall and avalanches
Risky slopes: evaluating the link between snowfall and avalanches
Ski resorts and researchers could potentially rely on statistics to evaluate the long-term avalanche activity on their slopes with a simple webcam, a weather station, and several years' worth of observations. Researchers from EPFL have validated a statistical avalanche model that translates observations into an assessment of the link between snowfall and avalanches.

Physics - Materials Science - 19.01.2015
Graphene multiplies the power of light
Graphene multiplies the power of light
Could graphene turn light to electricity? Scientists have shown that graphene can convert a single photon into multiple electrons, showing much promise for future photovoltaic devices. Graphene is a material that has gathered tremendous popularity in recent years, due to its extraordinary strength and light weight.