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Inside the push to eliminate lead from paint 新闻
来源平台:United Nations Environment Programme. 发布日期:2022
作者:  admin
收藏  |  浏览/下载:10/0  |  提交时间:2022/06/24
Gun Policy, China and Taiwan, Russian Propaganda: RAND Weekly Recap 新闻
来源平台:RAND Corporation. 发布日期:2022
作者:  admin
收藏  |  浏览/下载:3/0  |  提交时间:2022/06/24
Decommissioning agreement reached on advanced gas cooled reactor (AGR) nuclear power stations 新闻
来源平台:Department for Business, Energy & Industrial Strategy. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:0/0  |  提交时间:2021/07/26
‘Touchdown confirmed!’ Perseverance landing marks new dawn for Mars science 新闻
来源平台:Science. 发布日期:2021
作者:  admin
收藏  |  浏览/下载:3/0  |  提交时间:2021/02/22
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
Rare Higgs boson events allow researchers to probe deeper mysteries of physics 新闻
来源平台:Imperial College London. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:1/0  |  提交时间:2020/08/09
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
A Message from Our President and CEO, America's Wealth Gap, Disinformation: RAND Weekly Recap 新闻
来源平台:RAND Corporation. 发布日期:2020
作者:  admin
收藏  |  浏览/下载:2/0  |  提交时间:2020/06/09
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).


  
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