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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
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
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).


  
Scientists explore use of forecast databases for weather research 新闻
来源平台:European Centre for Medium-Range Weather Forecasts. 发布日期:2019
作者:  admin
收藏  |  浏览/下载:2/0  |  提交时间:2019/05/16
Multiphase reactivity of polycyclic aromatic hydrocarbons is driven by phase separation and diffusion limitations 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2019, 116 (24) : 11658-11663
作者:  Zhou, Shouming;  Hwang, Brian C. H.;  Lakey, Pascale S. J.;  Zuend, Andreas;  Abbatt, Jonathan P. D.;  Shiraiwa, Manabu
收藏  |  浏览/下载:9/0  |  提交时间:2019/11/27
phase state  ozone  indoor chemistry  bulk diffusion  kinetic modeling  
Role of air-mass transformations in exchange between the Arctic and mid-latitudes 期刊论文
NATURE GEOSCIENCE, 2018, 11 (11) : 805-812
作者:  Pithan, Felix;  Svensson, Gunilla;  Caballero, Rodrigo;  Chechin, Dmitry;  Cronin, Timothy W.;  Ekman, Annica M. L.;  Neggers, Roel;  Shupe, Matthew D.;  Solomon, Amy;  Tjernstrom, Michael;  Wendisch, Manfred
收藏  |  浏览/下载:12/0  |  提交时间:2019/04/09
El Niño / La Niña Update - March 2018 新闻
来源平台:world meteorological organization (wmo). 发布日期:2018
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2019/04/16