A team of Chinese scientists working deep underground have detected dark matter using a new kind of detection system, reports stdaily. The Jinping Underground Laboratory, which is used to study dark matter. The experiment marks the first time that researchers have used a high-purity germanium detector. The new device has a greatly improved detection sensitivity over what has been used in the past, according to Yue Qian, the head of the China Dark Matter Experiment.
The research was conducted at the Jinping Underground Laboratory, which is located about 2, meters under a mountain in Sichuan Province. Opened init is one of the world's deepest underground laboratories. The extreme depth helps block most of the cosmic rays that interfere with the [dark matter] observation," Yue said. The results of the current research program are expected to provide a solid foundation for more large-scale experiments in the future.
Chinese scientists make breakthrough in dark matter detection China Plus Published: Comment Share Share this with Close. Related stories. Share this story on. Most Popular.Jinping Underground lab for Nuclear Astrophysics JUNA will take the advantage of the ultralow background in Jinping underground lab, high current accelerator based on an ECR source and highly sensitive detector to study directly a number of crucial reactions to the hydrostatic stellar evolution for the first time at their relevant stellar energies.
The experimental setup, which include the accelerator system with high stability and high intensity, the detector system, and the shielding material with low background, will be established during the above research. The current progress of JUNA will be given. N2 - Jinping Underground lab for Nuclear Astrophysics JUNA will take the advantage of the ultralow background in Jinping underground lab, high current accelerator based on an ECR source and highly sensitive detector to study directly a number of crucial reactions to the hydrostatic stellar evolution for the first time at their relevant stellar energies.
AB - Jinping Underground lab for Nuclear Astrophysics JUNA will take the advantage of the ultralow background in Jinping underground lab, high current accelerator based on an ECR source and highly sensitive detector to study directly a number of crucial reactions to the hydrostatic stellar evolution for the first time at their relevant stellar energies.
Physics and Astronomy Twin Cities. Overview Fingerprint. Abstract Jinping Underground lab for Nuclear Astrophysics JUNA will take the advantage of the ultralow background in Jinping underground lab, high current accelerator based on an ECR source and highly sensitive detector to study directly a number of crucial reactions to the hydrostatic stellar evolution for the first time at their relevant stellar energies.
Access Link to publication in Scopus. Link to citation list in Scopus. Zhou, C. EPJ Web of Conferences, . EPJ Web of Conferences.One design configuration has eight additional hall spaces, each over 60 m long and approximately 12 m in width, with overburdens of about 2.
There are additional possibilities for further expansions at a nearby second bypass tunnel and along the entrance and exit branches of both bypass tunnels, potentially leading to an expanded CJPL comparable in size to Gran Sasso.
JinPing was also discussed as a site for a low-energy nuclear astrophysics accelerator. GOV collections:. Title: The second-phase development of the China JinPing underground laboratory. Full Record Other Related Research.
Jinping Neutrino Experiment
The second-phase development of the China JinPing underground laboratory. United States: N.Inside The US Government's Top-Secret Bioweapons Lab
Copy to clipboard. United States. In the town meeting on 8 September, at Asilomar, CA, associated with the 13th International Conference on Topics in Astroparticle and Underground Physics TAUPpresentations and panel discussions addressed plans for one-ton expansions of the current CJPL germanium detector array of the China Darkmatter EXperiment CDEX collaboration and of the duel-phase xenon detector of the Panda-X collaboration, as well as possible new detector initiatives for dark matter studies, low-energy solar neutrino detection, neutrinoless double beta searches, and geoneutrinos.
Free Publicly Available Full Text. Accepted Manuscript DOE. Copyright Statement. Other availability. Search WorldCat to find libraries that may hold this journal. Cited by: 10 works. Citation information provided by Web of Science. LinkedIn Pinterest Tumblr. Similar Records.A hot topic in the construction industry today is whether building underground, rather than creating more above ground, is the way forward. So, the only logical move is downwardsbut is it possible? The simple answer, yes!
In fact, there are some structures thousands of feet underground that are quite staggering that not many know about. The first on our list is the Jinping Underground Laboratory.
Famed for being the deepest building in the world, this lab is located nearly 8, feet within the 14, feet high Jinping mountains in Sichuan, China. Concerts, dining and events also take place here. Aside from the main venue hall, the underground building that took two years to build also has a swimming pool and a cafeteria, with the main auditorium able to hold over 5, spectators.
Have you ever wondered where spent nuclear fuel goes? Well, it cannot simply be thrown away or recycled due to its radioactive attributes that can last for an incredibly long time.
As a result, spent nuclear fuel must be stored away in a secure location such as this place, called the Onkalo Nuclear Repository. Currently, under development, this nuclear repository sits over 1, feet underground in Eurajoki, Finland.
Set to be constructed byonce fully constructed, this will be the first specifically designed final disposal site of spent nuclear fuel. Areas of it will be sealed from onwards and will not be accessible by humans for aboutyears! This mega underground structure, which carves through the Swiss Alps, is not only the deepest tunnel in the world but the longest too. At its lowest point, the Gotthard Base Tunnel delves to over 7, feet underground, 1. It has two tunnels, one for each direction that both measure a staggering 57km long, over 3km over the previous record holder, the Seikan Tunnel in Japan, and takes a full 20 minutes to get from one end to the other.
Not only because it is the deepest gold mine in the world at a colossal 20, feet which is over 7x the height of the Burj Khalifa, the tallest building in the world it also has people working down there!
Progress of Jinping Underground laboratory for Nuclear Astrophysics (JUNA)
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Skip to content. Related Posts: Timber Frame Construction?Located in Sichuan, China, this exquisite laboratory is surrounded by thick rock cover that prevents cosmic rays from reaching the lab and allows the lab to be capable of new research particle detection and physics research. Due to its unique location of being within a mountain, it uses an intricate tunnel system to maximize its use of space and allow the user to safely conduct groundbreaking research without outside interference.
Physicists from Tsinghua University determined that this type of research would best be conducted in a deep underground lab because it constrains cosmic rays from space and radiation that would tamper their research above ground. Within the depths of this lab, multiple experiments are operating. Some include the China Dark Matter Experiment CDEXa germanium dark matter detector that conducts research on a matter that would typically not be detected by observing electromagnetic radiation.
Dark matter research is an essential activity in underground laboratories worldwide due to its difficulties gathering information and conducting experiments without outside variables. Another important experiment that would not be possible above ground is the JinPing Neutrino Experiment, a study that collects precise measurements of solar and geoneutrinos, which is only possible due to the advantage of its unique location far away from nuclear reactors and having the lowest flux of reactor neutrinos of any underground lab.
Such is the case with DIANA, a nuclear astrophysics facility that is built and tested on the surface but can be disassembled and transported to a permanent underground location. With multiple projects going on inside and the exterior of the tunnels, the JinPing Underground Laboratory aims to be the largest deep-scale laboratory, welcoming scientists from across the globe to expand their knowledge.
These tunnels allow vehicular transportation, water supplies, water drainage, as well as usable space. There are four immense The laboratory was developed on the southernmost of the seven parallel tunnels. The tunnels from the laboratory were excavated to connect the two hydropower houses constructed on opposing sides of the mountain to capitalize on the different river water levels over the length of the tunnels and convert that to electric power.
Due to its surrounding features as well as the preexisting structure of the hydroelectric dam project, the underground laboratory is a self-sustaining engineering and architectural feat that uses hydropower from the nearby river. With no shortage of water, the high-powered equipment being used for experiments has an excellent cooling system. The increased space created interconnecting access tunnels for large experimental halls, and two pits for shielding tanks underneath the hall floor.
Before the second phase of construction, there were issues with proper air ventilation throughout the tunnels, resulting in an accumulation of dust on equipment and radon gas.
The expansion provided additional ventilation. There were also problems with the materials the dam was constructed from. The ordinary concrete used within the walls of the dam had naturally higher radioactivity than desirable for the underground laboratory, which defeated the purpose of using an underground lab.
During the second phase of the reconstruction, the construction team used marble, which has an advantage for radiation shielding of low being in radionuclides to not disrupt the experiments. In addition to physics exploration projects, rock mechanics and geotechnical engineering studies are also present in the tunnels. When excavating and expanding the tunnels, micro-seismic and acoustic signals were used to determine damaged zones within the rocks that might cause problems with the infrastructure later on.The project is among the most important of China's scientific and technological infrastructure push during the 13th Five-Year Plan period, which aims to focus on cutting-edge research in particle physics and other fields.
The 2,meter-deep laboratory, which was put into use inis the deepest underground laboratory in the world. The lab space expanded tocubic meters from 4, cubic meters in A series of dark matter detection experiments conducted by China's top universities including Tsinghua University have been launched at the laboratory. World's deepest underground laboratory starts new construction in SW China Xinhua Updated: Share - WeChat. Xinjiang's Bayingolin develops comprehensive tourism sector.
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Retrieved 19 November Frontiers of Physics. Bibcode : FrPhy Archived from the original PDF on 4 March Retrieved 1 November Retrieved 31 October The CDEX group was the first to use CJPL, and began the installation and commissioning of its ultra-low energy threshold, pure germanium probe detector system, which was based on point-contact technology, for the project on the direct probing of dark matter. Yue et al.
Physical Review D. Bibcode : PhRvD. Dark matter. Baryonic dark matter Cold dark matter Hot dark matter Light dark matter Mixed dark matter Warm dark matter Self-interacting dark matter Scalar field dark matter Primordial black holes.
Cuspy halo problem Dark fluid Dark galaxy Dark globular cluster Dark matter halo Dark radiation Dark star Dwarf galaxy problem Halo mass function Mass dimension one fermions Massive compact halo object Mirror matter Navarro—Frenk—White profile Scalar field dark matter. Categories : Experiments for dark matter search Physics experiments. Namespaces Article Talk. Views Read Edit View history. Help Learn to edit Community portal Recent changes Upload file.
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