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ITER NEWSLINE 34
The Neutral Beam Test Facility in Padua was again a topic for discussion at the recent top-level meetings held at the Château. All parties have accepted that in order to achieve Neutral Beams on ITER at megavolt level, a test facility is essential to establish and verify the new areas of technologies being debated. Experience has shown that there is no alternative to such a Test Facility, where work such as testing the high voltage holding with actual surfaces, distances and geometry or the high power extraction and acceleration will be carried out for the first time ever. Discussions on the realization of this facility are still ongoing and we hope that they can be concluded quickly to allow us to take the next step.
"Neutronics" is the science of calculating how radiation behaves using modelling techniques. This is very important for determining the nuclear heating, activation, radiation damage and the overall integration of machine, to ensure the safe operation of the ITER for workers and the public alike and as an essential part of the tritium breeding test blanket program.
This meeting was able to discuss the recently produced ITER neutronics reference model and saw the start of a big push to coordinate research at an international level to address nuclear analysis requirements. Some of the participants in the meeting took the opportunity to visit the ITER site and see for themselves the tangible progress towards the building of a machine which until now has existed only in the virtual world of computer models.
KSTAR's role is to establish the scientific and technological base to support fusion research, in particular for the construction, commissioning and operation of ITER. In particular the cryogenic system, despite being much smaller than ITER (between 1/10 and 1/40 depending if cooling power [kW] at 4.5 K or dimension of cryodistribution is taken into account), it is similar for features and components (4.5 K refrigerators, transfer lines, cold circulators, cold compressors, distribution boxes, etc.)
In early April 2008, JET resumed its scientific program after the successful completion of the 2007 Shutdown and the subsequent Restart, both of which were executed in good agreement with the intended timeline. Part of the 2008 experimental program will be dedicated to commissioning and scientific exploitation of JET's new major systems such as the ITER-like Ion Cyclotron Resonance Heating System, and the High Frequency Pellet Injector System. During the Restart phase, the commissioning of the Neutral Beam Injection System went extraordinarily well. On 25 March, 2008, JET reached a new record by injecting a total of 4.9GJ of Neutral Beam Energy into the plasma in 42 pulses (compared with a daily target of 24 pulses) within one day.
Also, on 6 May, JET's new Ion Cyclotron Resonance Heating system (ITER-like ICRH system) coupled power into plasma for the first time. This represents an important milestone in one of JET's most extensive enhancement projects. Read more here ....
A prototype Nb3Sn sample of the Toroidal Field (TF) Coil conductor has been successfully tested in the Sultan high field test facility. The sample was fabricated for the ITER Organization by CRPP/PSI using conductor provided by the United States DA. Two cable configurations were tested in the two strands of the sample, the TF reference and a US derived configuration. At 70kA and 11.8T maximum field, the TF reference conductor achieved about 7K after 200 charging cycles and the other strand 0.7K less. The strand was manufactured by Oxford Superconductor Technologies following the internal tin route process.
The visit started with lunch at the Cantine des Cadres on the Cadarache site. All U.S. citizens at ITER were invited to the lunch to have the opportunity to greet the Ambassador. This was a good move, as the relaxed atmosphere facilitated open dialogue throughout the afternoon. M. de Rose recounted fascinating anecdotes of his meetings with such scientific giants as Einstein and Oppenheimer.
During a meeting in the ITER building, the DG, Norbert Holtkamp, Gary Johnson and Neil Calder dispensed with PowerPoint and had a focussed discussion with the Ambassador on progress at ITER. U.S. funding for Financial Years 2008 and 2009 was discussed and Stapleton was very supportive.
There was then a visit to the site guided by Francois Gauché, Head of Agence ITER France and Michel Bedoucha, Deputy Head of CEA Cadarache. The weather was dismal but the mood was bright!
www.facebook.com) page in order to meet other ITER children. "The idea is to get in touch with each other and to learn more about our different origins and cultures," Lorea explains.
Ten ITER children have already got in contact with Lorea via "facebook", some of them even even met for a night-out in Aix-en-Provence during their last summer vacation. This summer, Lorea prepares herself for University. "I will certainly sign in for science, but certainly not physics," the young Madrileña says. "Doing physics you have to be very bright, I believe."