| 单词 | ion beam |
| 例句 | “That’s not a challenge. Those old video systems emit faint ion beams. Invisible to the naked eye, of course, but not with your iris-cam...” Artemis Fowl 2001-04-26T00:00:00Z "In atom-probe tomography, we start by sharpening a piece of the lunar sample into a very sharp tip, using a focused ion beam microscope, almost like a very fancy pencil sharpener," Greer said. The Moon is 40 million years older than previously thought 2023-10-23T04:00:00Z Meanwhile, DOE scientists will assess which lasers or alternatives, such as ion beams, are worth pursuing and hone target designs as well. Startups try to turn laser fusion success into clean power plants 2023-02-14T05:00:00Z The impact of the ion beam on the fragmentation target breaks the nucleus of the stable isotope apart and produces many hundreds of rare isotopes simultaneously. A particle accelerator that just turned on could reveal rare forms of matter 2022-11-26T05:00:00Z Other options on the table include ion beams and gravity tractors to push incoming objects away from us. NASA pulls a "Deep Impact" as its spacecraft collides with an asteroid 2022-09-27T04:00:00Z NASA’s planetary defense office is also studying other options, such as gravity tractors and ion beams, he says. NASA recalculates the odds (low, whew!) of asteroid Bennu striking Earth 2021-08-11T04:00:00Z Other methods use a focused ion beam to slice frozen cells into layers thinner than 100 nanometres, allowing researchers to study molecules in their cellular contexts3. Technologies to watch in 2020 2020-01-20T05:00:00Z He mounted some of the best crystals in epoxy, polished them down to a fresh face, and vaporized spots on the rims with an ion beam. Shock and thaw? Earth’s oldest asteroid impact may have helped lift the planet out of a deep freeze 2019-08-27T04:00:00Z Apparatus for accelerating ion beams at the Joint Institute for Nuclear Research in Dubna, Russia.Credit: Extreme chemistry: experiments at the edge of the periodic table 2019-01-29T05:00:00Z Guinness World Records lists the smallest reproduction of a printed book as Teeny Ted from Turnip Town, which measures 70 micrometres by 100 micrometres and was etched using an ion beam. Why we are fascinated by miniature books 2019-01-03T05:00:00Z For this study the researchers instead used a focused ion beam to slice bone into samples for microscope analysis. Core Strength: Extreme "Close Ups" May Help Explain Why Our Bones Are So Strong 2018-05-03T04:00:00Z It is made from platinum-coated silicon nitride, and was illustrated using a focused ion beam. Season's micro-greetings: Scientists claim smallest Christmas card 2017-12-17T05:00:00Z The award for tiniest tribute went to scientists at the University of Nottingham who used a focused ion beam to etch the message “Happy 90th Birthday Your Majesty” onto a strand of corgi hair. Queen Elizabeth II marks 90th birthday with public appearances, corgi cake 2016-04-21T04:00:00Z Read about the iPhone hacking idea that involves cutting with an ion beam. Quiz: Is this a way to hack an iPhone ... or kill James Bond? 2016-03-25T04:00:00Z They conducted a series of examinations using sophisticated microscopes and sliced samples using a focused ion beam to check the internal structures. Dinosaur fossils preserve apparent red blood cells, collagen 2015-06-09T04:00:00Z Tri Alpha researchers are already working with an upgraded device, which has differently oriented ion beams and more beam power. Mystery company blazes a trail in fusion energy 2015-06-02T04:00:00Z It is made from platinum-coated silicon nitride, and was illustrated using a focused ion beam. Season's micro-greetings: Scientists claim smallest Christmas card 2017-12-17T05:00:00Z It consists of over 1.2 million letters carved on a gold-plated silicon chip by engineers using an ion beam. Pinhead-sized Bible goes on show in Jerusalem - BBC News 2015-04-25T04:00:00Z If the room warms by even a fraction of a degree, the metal can expand imperceptibly, skewing the ion beam, wrecking the sample and forcing the team to start over. Sebastian Seung’s Quest to Map the Human Brain 2015-01-08T05:00:00Z The work will create the floor where the facility’s heavy ion beam will hit a target and create the rare isotopes. Concrete coming to ‘heart’ of physics site 2014-11-29T05:00:00Z By shooting an ion beam of a particular energy from an accelerator at a target and measuring the decays of the particular isotope. Dance Your Ph.D. Finalists Announced; Pick Your Favorite 2012-10-09T20:07:07Z For starters, although chemical etching and ion beams can be used to create holes in graphene, it is difficult to produce holes of a specific size in an even configuration, Grossman acknowledges. Researchers Consider Graphene as a Cure for Desalination Woes 2012-07-16T11:15:00.207Z The vacuum tank is placed between the poles of an electromagnet, whose field bends the ion beam into a circular orbit. LRL Accelerators The 184-Inch Synchrocyclotron By that time a new principle had been discovered which made it possible to obtain ion beams of much higher energy than originally hoped for. LRL Accelerators The 184-Inch Synchrocyclotron |
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