A successful start with helium plasma / hydrogen plasma to follow at the beginning of 2016
On 10th December 2015 the first helium plasma was produced in the Wendelstein 7-X fusion device at the Max Planck Institute for Plasma Physics (IPP) in Greifswald. After more than a year of technical preparations and tests, experimental operation has now commenced according to plan. Wendelstein 7-X, the world’s largest stellarator-type fusion device, will investigate the suitability of this type of device for a power station.
Following nine years of construction work and more than a million assembly hours, the main assembly of the Wendelstein 7-X was completed in April 2014. The operational preparations have been under way ever since. Each technical system was tested in turn, the vacuum in the vessels, the cooling system, the superconducting coils and the magnetic field they produce, the control system, as well as the heating devices and measuring instruments. On 10th December, the day had arrived: the operating team in the control room started up the magnetic field and initiated the computer-operated experiment control system. It fed around one milligram of helium gas into the evacuated plasma vessel, switched on the microwave heating for a short 1,3 megawatt pulse – and the first plasma could be observed by the installed cameras and measuring devices. “We’re starting with a plasma produced from the noble gas helium. We’re not changing over to the actual investigation object, a hydrogen plasma, until next year,” explains project leader Professor Thomas Klinger: “This is because it’s easier to achieve the plasma state with helium. In addition, we can clean the surface of the plasma vessel with helium plasmas.”
The first plasma in the machine had a duration of one tenth of a second and achieved a temperature of around one million degrees. “We’re very satisfied”, concludes Dr. Hans-Stephan Bosch, whose division is responsible for the operation of the Wendelstein 7-X, at the end of the first day of experimentation. “Everything went according to plan.” The next task will be to extend the duration of the plasma discharges and to investigate the best method of producing and heating helium plasmas using microwaves. After a break for New Year, confinement studies will continue in January, which will prepare the way for producing the first plasma from hydrogen.
The objective of fusion research is to develop a power source that is friendly to the climate and, similarly to the sun, harvests energy from the fusion of atomic nuclei. As the fusion fire only ignites at temperatures of more than 100 million degrees, the fuel – a thin hydrogen plasma – must not come into contact with cold vessel walls. Confined by magnetic fields, it floats virtually free from contact within the interior of a vacuum chamber. For the magnetic cage, two different designs have prevailed – the tokamak and the stellarator. Both types of system are being investigated at the IPP. In Garching, the Tokamak ASDEX Upgrade is in operation and, as of today, the Wendelstein 7-X stellarator is operating in Greifswald.
At present, only a tokamak is thought to be capable of producing an energy-supplying plasma and this is the international test reactor ITER, which is currently being constructed in Cadarache in the frame of a worldwide collaboration. Wendelstein 7-X, the world’s largest stellarator-type fusion device, will not produce energy. Nevertheless, it should demonstrate that stellarators are also suitable as a power plant. Wendelstein 7-X is to put the quality of the plasma equilibrium and confinement on a par with that of a tokamak for the very first time. And with discharges lasting 30 minutes, the stellarator should demonstrate its fundamental advantage – the ability to operate continuously. In contrast, tokamaks can only operate in pulses without auxiliary equipment.
The assembly of Wendelstein 7-X began in April 2005: a ring of 50 superconducting coils, some 3.5 metres high, is the key part of the device. Their special shapes are the result of refined optimisation calculations carried out by the “Stellarator Theory Department”, which spent more than ten years searching for a magnetic cage that is particularly heat insulating. The coils are threaded onto a ring-shaped steel plasma vessel and encased by a steel shell. In the vacuum created inside the shell, the coils are cooled down to superconduction temperature close to absolute zero using liquid helium. Once switched on, they consume hardly any energy. The magnetic cage that they create, keeps the 30 cubic metres of ultra-thin plasma – the object of the investigation – suspended inside the plasma vessel.
The Latest on: Fusion
via Google News
The Latest on: Fusion
- Hot chicken, ramen and Asian fusion coming to Uptown Commons in North Long Beachon July 22, 2019 at 1:33 pm
Three new restaurants will make their way to North Long Beach as part of the forthcoming Uptown Commons shopping center. Frontier Real Estate Investments announced Monday, July 22, that customers can ... […]
- Fusion Biopsy System Market by Manufacturers, Regions, Types - Applications and Forecast 2024on July 22, 2019 at 12:14 pm
In this report, our team research the global Fusion Biopsy System market by type, application, region and manufacturer 2013-2018 and forcast 2019-2024. For the region, type and application, the sales, ... […]
- This Fusion Mashup of ‘Shape of You’ And ‘Urvasi Urvasi’ Will Leave You Hooked For a Whileon July 22, 2019 at 12:14 pm
Veena exponent Srivani’s latest release is a unique mash-up of Ed Sheeran’s Shape Of You with a popular Bollywood song called Urvasi Urvasi. The Bollywood songs matches surprisingly well with the ... […]
- Art Camp Pottery Fusionon July 22, 2019 at 12:22 am
This week, the focus will be on special pottery painting techniques! We will use paper masking, silk screens, cheese cloth, and glazes that create special effects. The kids will blow bubbles and ... […]
- Optiv Security opens the Dallas Innovation and Fusion Centeron July 21, 2019 at 5:00 pm
Optiv Security, a security solutions integrator delivering end-to-end cybersecurity solutions across the globe, announced the opening of its new Dallas Innovation and Fusion Center, a state-of-the-art ... […]
- MLW Fusion Recap (7/20): Hammerstone Collides With Davey Boy, Los Parks Take On Los Wagnerson July 21, 2019 at 4:07 am
Welcome to Wrestling INC's recap of Major League Wrestling's weekly episodic Fusion. Today's show takes place from Cicero Stadium in Chicago, Illinois. Feel free sound off thoughts in the comments. ... […]
- MLW Fusion preview: Double main eventon July 20, 2019 at 5:01 am
The following matches are advertised for tonight’s Major League Wrestling Fusion television show. -LA Park and Hijo de LA Park vs. Dr. Wagner Jr. and El Hijo de Wagner Jr. -Alex Hammerstone vs. ... […]
- Skunk Works' Exotic Fusion Reactor Program Moves Forward With Larger, More Powerful Designon July 19, 2019 at 11:20 am
Lockheed Martin's Skunk Works is building a new, more capable test reactor as it continues to move ahead with its ambitious Compact Fusion Reactor program, or CFR. Despite slower than expected ... […]
- Spinal Fusion Market 2019| Outlook, Opportunity and Demand Analysis Report by 2024 - Market Research Engineon July 19, 2019 at 5:54 am
Jul 19, 2019 (Heraldkeepers) -- New York, July 19, 2019: The report covers detailed competitive outlook including the market share and company profiles of the key participants operating in the global ... […]
- 2019 Ford Fusion: A Ford that has the bases coveredon July 18, 2019 at 9:15 pm
For years, the Fusion has covered the bases in content and performance. Unaltered is the trio of four-cylinder engines plus traditional and plug-in hybrid powertrains. The latter, installed in the ... […]
via Bing News