In the beginning…the Earth had essentially no free oxygen in its atmosphere. The Great Oxygenation Event came around 2000 million years ago, when cyanobacteria produced enough oxygen for it to accumulate, but only in the past […]
Getting colder [Earlier this year] we reported the bringing into operation of a 45 cm3 polarized proton target working at 0.55 K. It now looks as if the development can be carried further with the testing of […]
Keithley Instruments has announced the Model 2460 SourceMeter, the company’s latest benchtop Source Measure Unit (SMU) instrument with a capacitive touchscreen graphical user interface. Model 2460 offers users higher power sourcing (up to 105 V, 7 A DC/7 A pulse, […]
• Science and Technology of the Free-Electron Laser
• Walter Thirring 1927–2014 • Bruno Righini 1931–2014 • Alan Astbury 1934–2014 • Vladimir Georgievich Kadyshevsky 1938–2014
• ESS lays new foundations for science • Italian industry and culture come to CERN • UN and CERN celebrate 60 years of science for peace and development • French Physical Society honours Guillaume Unal • ITEP presents the 2014 Pomeranchuk Prize • Evangelos Gazis honoured • The John Adams Institute: 10 years strong • Winters at CERN • Visits
Hadron-production at accelerators and in cosmic rays.
An interview with director Fernando Quevedo.
ALICE opens a window on collective behaviour.
Results from the coldest region of the Earth.
Recollections of CERN’s early days from the CERN Archives.
An exceptional run for the heavy-ion collider in 2014.
Pulsar funnelling plasma Until now, ultra-luminous X-ray sources (ULXs) were thought to be black holes, because their high luminosity implied a mass exceeding by far the maximal mass of a neutron star. The most luminous of them were […]
An oxygen cylinder holds more gas if filled first with a sponge-like powder. Jared DeCoste of Leidos, Inc. in Maryland and colleagues searched among 10,000 metal-organic frameworks using a Monte Carlo simulation, and found two that […]
The term “on paper” often means “theoretically”, but James Collins of Harvard University, Boston University, and the Howard Hughes Medical Institute in Maryland and colleagues have shown that working biological circuits can be printed on […]
For the first time, human stem cells have been converted into insulin-producing pancreatic β cells. Douglas Melton of the Harvard Stem Cell Institute and colleagues report on a complex process that over 35 days produces some […]
Gianotti At its 173rd closed session on 4 November, CERN Council selected the Italian physicist Fabiola Gianotti as the organization’s next director-general. The appointment will be formalized at the December session of Council, and Gianotti’s mandate will […]
A Star Trek-like tractor beam able to stably push or pull semitransparent gold-coated glass spheres over tens of centimetres has been developed by Vladen Shvedov of the Australian National University in Canberra and colleagues. They […]
Just above the surface of the Sun lies the relatively cool photosphere, at around 6000 K, but it turns out to host some remarkably hot explosions. Using the Interface Region Imaging Spectrograph (IRIS), Hardi Peter of […]
Cells on screen Eric Betzig, of the Janelia Research Campus of the Howard Hughes Medical Institute in Virginia, shared the 2014 Nobel Prize for Chemistry for the invention of super-resolution microscopy. Now, he and his colleagues have taken […]
Le Conseil du CERN annonce une prochaine nomination au poste de directeur général CUORE a le cœur le plus froid de l’Univers connu L’expérience NA62 se poursuit au SPS Quelle est la luminosité du LHC ? ALICE étudie le rôle des mini-jets dans les collisions p–Pb … … et enquête sur l’atténuation du ψ (2S) L’association bosons W-jets sous la loupe d’ATLAS CMS présente ses mesures de précision de la masse du quark top Le cryomodule de type ILC passe le test Le Global Neutrino Network prend son envol Le microscope de super-résolution passe au 3D La source ultra-lumineuse de rayons X est un ” simple ” pulsar
GNN On 20–12 September, CERN hosted the fifth annual Mediterranean-Antarctic Neutrino Telescope Symposium (MANTS). For the first time, the meeting was organized under the GNN umbrella. The idea to link more closely the various neutrino telescope projects […]
CM2 at home For the first time, the gradient specification of the International Linear Collider (ILC) design study of 31.5 MV/m has been achieved on average across an entire ILC-type cryomodule made of ILC-grade cavities. A team at Fermilab […]
Precise measurements of the mass of the top quark provide key inputs to global electroweak fits and to tests of the internal consistency of the Standard Model. The masses of the Higgs boson and the […]
The ATLAS collaboration has updated its measurement of the production of W bosons in association with jets (W+jets), which is an important channel at the LHC for precision comparisons with QCD. A precise understanding of these […]
Nuclear modiﬁcation factor Charmonia, bound states of charm (c) and anti-charm (c) quarks, are probes for the formation of hot quark–gluon plasma (QGP) in heavy-ion collisions. The suppression of charmonium, already observed at the lower energies of CERN’s […]
One of the hottest topics at the LHC is the understanding of potential collective effects in proton–lead collisions, prompted by the discovery of ridge structures in angular correlations of particles ( CERN Courier January/February 2013 p9 ). Further insight is […]
The LHCb Collaboration has published the results of a luminosity calibration with a precision of 1.12%. This is the most precise luminosity measurement achieved so far at a bunched-beam hadron collider. LHC beam results The absolute luminosity at […]
The giant slowly awakes The giant slowly awakes, as the process to cool down the LHC continues in the final stage of the first long shutdown, LS1. By mid-October, the last remaining sector, 3-4 (seen here in 2009), had […]
The final straw-tracker module With the end in sight for CERN’s Long Shutdown (LS1), the accelerator chain has been gradually restarting. Since early October, the Super Proton Synchrotron (SPS) has been delivering beams of protons to experiments, including NA62, […]