GSTDTAP

浏览/检索结果: 共26条,第1-10条 帮助

限定条件                    
已选(0)清除 条数/页:   排序方式:
Ancient helium leaking from core offers clues of Earth’s formation 新闻
来源平台:American Geophysical Union. 发布日期:2022
作者:  admin
收藏  |  浏览/下载:5/0  |  提交时间:2022/06/24
International Mountain Day 新闻
来源平台:world meteorological organization (wmo). 发布日期:2021
作者:  admin
收藏  |  浏览/下载:9/0  |  提交时间:2021/12/15
Hidden within African diamonds, a billion-plus years of deep-earth history 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:16/0  |  提交时间:2021/05/13
Comb of a lifetime: a new method for fluorescence microscopy 新闻
来源平台:EurekAlert. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:9/0  |  提交时间:2021/01/06
Solar Orbiter ready for science despite COVID-19 setbacks 新闻
来源平台:European Space Agency. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:7/0  |  提交时间:2020/07/09
Evidence for a hot start and early ocean formation on Pluto 期刊论文
NATURE GEOSCIENCE, 2020, 13 (7) : 468-+
作者:  Bierson, Carver J.;  Nimmo, Francis;  Stern, S. Alan
收藏  |  浏览/下载:10/0  |  提交时间:2020/06/29
Biology in art: Genetic detectives ID microbes suspected of slowly ruining humanity's treasures 新闻
来源平台:EurekAlert. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:7/0  |  提交时间:2020/06/19
Common CFC replacements break down into persistent pollutants 新闻
来源平台:American Geophysical Union. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:2/0  |  提交时间:2020/05/18
Researchers virtually 'unwind' lithium battery for the first time 新闻
来源平台:EurekAlert! - Earth Science. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:14/0  |  提交时间:2020/02/24
Demonstration of cooling by the Muon Ionization Cooling Experiment 期刊论文
NATURE, 2020, 578 (7793) : 53-+
作者:  Zheng, Wen;  Zhao, Wenjing;  Wu, Meng;  Song, Xinyang;  Caro, Florence;  Sun, Ximei;  Gazzaniga, Francesca;  Stefanetti, Giuseppe;  Oh, Sungwhan;  Mekalanos, John J.;  Kasper, Dennis L.
收藏  |  浏览/下载:10/0  |  提交时间:2020/07/03

The use of accelerated beams of electrons, protons or ions has furthered the development of nearly every scientific discipline. However, high-energy muon beams of equivalent quality have not yet been delivered. Muon beams can be created through the decay of pions produced by the interaction of a proton beam with a target. Such '  tertiary'  beams have much lower brightness than those created by accelerating electrons, protons or ions. High-brightness muon beams comparable to those produced by state-of-the-art electron, proton and ion accelerators could facilitate the study of lepton-antilepton collisions at extremely high energies and provide well characterized neutrino beams(1-6). Such muon beams could be realized using ionization cooling, which has been proposed to increase muon-beam brightness(7,8). Here we report the realization of ionization cooling, which was confirmed by the observation of an increased number of low-amplitude muons after passage of the muon beam through an absorber, as well as an increase in the corresponding phase-space density. The simulated performance of the ionization cooling system is consistent with the measured data, validating designs of the ionization cooling channel in which the cooling process is repeated to produce a substantial cooling effect(9-11). The results presented here are an important step towards achieving the muon-beam quality required to search for phenomena at energy scales beyond the reach of the Large Hadron Collider at a facility of equivalent or reduced wfootprint(6).