40-30 has been involved in the LHC project for the past five years and a contract has been signed with CERN that applies until 2009. 40-30 has worked on the LHC’s assembly and on monitoring the air tightness of all pipes and tubing making up the system, as well as all the superconducting magnet interconnections.
The objective of the LHC project is to gain understanding of the physical phenomenon that occurred just after the Big Bang, particularly through isolation of the Higgs boson, a particle that is believed to help explain the origin of the mass of all particles. In order to recreate the conditions of the Big Bang and to isolate this particle, CERN has built the Large Hadron Collider (LHC), a circular tunnel with a 27km circumference.
The LHC is buried 100 metres underground on the Franco-Swiss border, between the Jura Mountains and Lake Geneva. It will produce frontal collisions between two identical particle beams guided by 1,800 superconducting magnets, all inside a vacuum comparable to that of outer space. Each beam will travel for 10 hours at a velocity close to the speed of light, covering a distance equivalent to a return trip to Neptune. To function, the ring must reach a temperature of 1.9 Kelvin (-271.3°C).
Between 2003 and 2005, 50 employees from 40-30 worked on the QRL feed (for cryogenic distribution) prior to the installation of the LHC ring. The team tested 43,000 welded joints and spotted 354 leaks. This precision work was conducted under the supervision of COFREND-certified personnel by teams of experienced controllers using all existing helium control methods (including sniffing and the global vacuum system). This required numerous working hours, since the response time for each welded seal can be up to two hours.
Since 2005, 40-30 has been involved in building the main LHC ring, controlling the 1,800 magnets’ air tightness (the magnets have an average length of 15 metres and weigh over 27 metric tonnes each), as well as the interconnections of magnets within the tunnel as work progresses. 40-30 took part in the installation and sterilisation of the LHC’s straight-line sections and has been carrying out most of the maintenance for the pumping system infrastructure.
40-30 was also in charge of the maintenance of leak-detector systems (helium detectors and spectrometers), pumping systems and drying and sterilising systems. And, in the course of their duties, members of 40-30’s team have, over five years, cycled in excess of 100,000km inside CERN’s tunnel!
The construction by CERN of the world’s most powerful particle accelerator has been mobilising close to 500 companies over more than 10 years at a cost of about €3bn. Start up is expected in July/August 2008 and the official inauguration is due to take place on 21 October 2008.
40-30, which is headquartered in Grenoble (in south-eastern France), develops its own maintenance systems. The company, which was founded in 1986, works in four main fields: vacuum technology (leak detectors, low-pressure metrology and pumps); electronics (automation, temperature control, equipment transferral and industrial radiofrequencies); cleaning and ultraclean reconditioning; and customer support (customer proximity, training, non-destructive testing and engineering).
On the strength of its experience in the semiconductor business, 40-30 is able to apply its expertise in numerous industries, including the aerospace, farming, automotive, chemicals, pharmaceuticals and photovoltaic sectors.
The company has nine operating sites in France, as well as an international branch in Singapore. 40-30 has a turnover of €20m and employs 210 staff.
Writing and deleting magnets with lasers
19.04.2018 | Helmholtz-Zentrum Dresden-Rossendorf
Ultrafast electron oscillation and dephasing monitored by attosecond light source
19.04.2018 | Yokohama National University
Study published in the journal ACS Applied Materials & Interfaces is the outcome of an international effort that included teams from Dresden and Berlin in Germany, and the US.
Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) together with colleagues from the Helmholtz-Zentrum Berlin (HZB) and the University of Virginia...
Novel highly efficient and brilliant gamma-ray source: Based on model calculations, physicists of the Max PIanck Institute for Nuclear Physics in Heidelberg propose a novel method for an efficient high-brilliance gamma-ray source. A giant collimated gamma-ray pulse is generated from the interaction of a dense ultra-relativistic electron beam with a thin solid conductor. Energetic gamma-rays are copiously produced as the electron beam splits into filaments while propagating across the conductor. The resulting gamma-ray energy and flux enable novel experiments in nuclear and fundamental physics.
The typical wavelength of light interacting with an object of the microcosm scales with the size of this object. For atoms, this ranges from visible light to...
Stable joint cartilage can be produced from adult stem cells originating from bone marrow. This is made possible by inducing specific molecular processes occurring during embryonic cartilage formation, as researchers from the University and University Hospital of Basel report in the scientific journal PNAS.
Certain mesenchymal stem/stromal cells from the bone marrow of adults are considered extremely promising for skeletal tissue regeneration. These adult stem...
In the fight against cancer, scientists are developing new drugs to hit tumor cells at so far unused weak points. Such a “sore spot” is the protein complex...
In an article that appears in the journal “Review of Modern Physics”, researchers at the Laboratory for Attosecond Physics (LAP) assess the current state of the field of ultrafast physics and consider its implications for future technologies.
Physicists can now control light in both time and space with hitherto unimagined precision. This is particularly true for the ability to generate ultrashort...
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19.04.2018 | Physics and Astronomy