Tag archive: CERN
Barbara Warmbein | 12 March 2009
The ILC is not the only accelerator that has to struggle against electron clouds and their distracting effect on the particle beam. Even the Large Hadron Collider LHC at CERN may suffer from it, and tests on two of its pre-accelerators, the PS and the SPS, have already proven several techniques with which the electron-cloud build-up can be avoided or at least be brought under better control. One of those techniques is ‘scrubbing’, and it does what it says on the packet: it scrubs the beam pipe clean from the inside. It does not do this with bucket, cloth and detergent, however. Instead, a beam at the highest possible intensity, the limit of what the machines can take, is pumped through, literally getting hoovered by the vacuum pumps.
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CERN, electron cloud, LHC, scrubbing
Barbara Warmbein | 5 March 2009
When talking about what they know and what they want to find out, physicists like to speak about ‘landscapes’. There are the well-chartered lands of the Standard Model and undiscovered territories like the Terascale – a region that the Large Hadron Collider LHC at CERN will enter when protons start colliding in autumn. With the LHC and its eventful proton-proton collisions scientists expect a whole range of signatures of expected and new physics, and they will need a machine to follow up on these to get a clearer view. In February, a group of more than one hundred theorists and experimentalists met at CERN for three weeks. Their goal was to outline the landscapes they may find with data from the LHC and to develop strategies for how to pick the right tools for the coming expedition.
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CERN, future accelerators, future colliders
12 February 2009
Geneva, 9 February 2009. CERN management today confirmed the restart schedule for the Large Hadron Collider (LHC) resulting from the recommendations from last week’s Chamonix workshop. The new schedule foresees first beams in the LHC at the end of September this year, with collisions following in late October. A short technical stop has also been foreseen over the Christmas period. The LHC will then run through to autumn next year, ensuring that the experiments have adequate data to carry out their first new physics analyses and have results to announce in 2010. The new schedule also permits the possible collisions of lead ions in 2010.
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CERN, Chamonix, LHC
13 November 2008
Plans are taking shape to form a new group to coordinate and stimulate R&D on monolithic and vertically integrated pixel detectors for scientific applications in high-energy physics and beyond. In a joint message, the directorates of CERN, KEK and Fermilab have offered their support. They suggested the formation of a regionally balanced coordination board to take this forward. From discussions in recent reviews and workshops, we think there is an opportunity for the many efforts underway worldwide to benefit a larger community. We already have strong collaborations for the development of vertical integration and monolithic active pixel sensors (MAPS). The new world-wide effort would build upon the existing collaborations and open the technology developments to other scientific areas. We will discuss how best to achieve this at upcoming meetings. Our suggestions will then be comunicated to the directorates of CERN, KEK and Fermilab.
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CERN, detector R&D, Fermilab, KEK, MAPS, monolithic active pixel sensors
Marc Ross | 30 October 2008
The ILC-CLIC (International Linear Collider - Compact Linear Collider Study) collaboration was started earlier this year at CERN. It consists of five working groups which are led by conveners from both projects. Collaboration mandates and activities were defined with an eye toward this autumn’s workshops: the CLIC08 workshop, held at CERN from 14 to 17 October and the ILC-LCWS08, to be held in the middle of next month in Chicago. CLIC08 was the first time the group met face to face since the collaboration and its working groups were established. The collaboration is intended to serve two basic purposes: firstly to allow a more efficient use of resources, especially engineers, and secondly to promote communication between the two project teams. Of course, face-to-face meetings tend to be more effective than tele-conferencing, so many excellent opportunities for direct, informal, discussion arose between the two teams and we made good progress toward our second purpose. Since the framework of the meeting was the CLIC08 workshop, the agenda naturally focused on CLIC challenges and plans with specific collaboration highlights having a key, but minor overall role.
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CERN, CLIC, CLIC08, ILC-CLIC collaboration
Barbara Warmbein | 11 September 2008
Wednesday must have been one of the biggest days in science history. It certainly was the biggest day in particle physics for a long time coming - the first full beam around the LHC. The first protons completed the full circle at 10:28 am (less than an hour after first injection), and scientists in CERN's control rooms cheered and clapped, ran to the screens, pointed at monitors and breathed a massive, communal sigh of relief. Amazingly, after a cryogenic glitch around lunchtime, another first beam made its first full lap in the opposite direction at 15:03. The media centre in CERN's Globe was abuzz, French media had gathered in a Paris bar to follow the events, German press was connected via a multi-way videoconference and at Fermilab scientists and press watched in dressing gown and pyjamas. It was a picture-book start-up.
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CERN, LHC
11 September 2008
Geneva, 10 September 2008. The first beam in the Large Hadron Collider at CERN1 was successfully steered around the full 27 kilometres of the world's most powerful particle accelerator at 10h28 this morning. This historic event marks a key moment in the transition from over two decades of preparation to a new era of scientific discovery.
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CERN, LHC
24 July 2008
Unusually for the holiday season, the car parks are full, finding a table at lunch is a formidable challenge, and people can (more than ever) be found in their offices late into the night. All the evidence points to one thing… the most ambitious particle collider in the world is just a few weeks away from its first proton beam!
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CERN, LHC
Perrine Royole-Degieux | 10 July 2008
The future Director-General of CERN Rolf Heuer, currently Research Director at DESY, presented his personal vision of the future of particle physics in Europe at the ILC-ECFA meeting in Warsaw, Poland. Heuer emphasised the exciting times the community is now entering with the LHC start-up. The exploration of our mysterious "Dark Universe" is the main motivation for present and future astronomy and particle physics projects, and with the LHC and its highest collision energy ever, we are on the verge to explore it. After reviewing many possible scenarios and options for the after-LHC phase, Heuer said he hoped that particle physics research will continue with the same momentum for future projects, in particular for a future e+-e- collider. He hopes that the community will make use of these exciting times to establish a sustainable and global partnership between the labs, "of which CERN could be the catalyst."
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CERN, ECFA, Heuer, ILC-ECFA
17 April 2008
Being the new CERN/LHC Communicator for Germany but not having a degree in physics (I worked at the press office of the Centre for European Economic Research in Mannheim, Germany, for the past ten years), the CERN Open Day was an excellent opportunity to learn more about particle physics and "the world's largest particle physics laboratory" that I wouldn't have wanted to miss. The crowds were massive, but with the help of a press badge I managed to see a good variety of events and places.
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CERN, CERN open day, LHC, LHC communication
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