The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipela...The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia＇s characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur （Trachypithecus poliocephalus） is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.展开更多
The 1.6GeV synchrotron of China Spallation Neutron Source(CSNS)project is a Rapid Cycling Synchrotron (RCS),which accelerates a high-intensity proton beam from 80MeV to 1.6GeV at a repetition rate of 25Hz.The RCS magn...The 1.6GeV synchrotron of China Spallation Neutron Source(CSNS)project is a Rapid Cycling Synchrotron (RCS),which accelerates a high-intensity proton beam from 80MeV to 1.6GeV at a repetition rate of 25Hz.The RCS magnet system consists of 24 dipole magnets(main dipoles),48 quadrupole magnets(main quadrupoles),16 sextupole magnets,some tune shift quadrupoles and corrector magnets.All the magnets are of large aperture for a high beam power of 0.1MW,one design issue is the fringe field at pole end.And the main dipoles and main quadrupoles work at 25Hz repetition rate,the eddy current is an additional issue.In this paper the magnet design of the two kinds of main magnets will be described.展开更多
文摘The nominated property, Cat Ba Archipelago, includes Cat Ba Archipelago Biosphere Reserve, Cat Ba National Park, and Long Chau Island group, which belongs to Cat Hai District, Hal Phong City, Vietnam. Cat Ba Archipelago represents the ongoing ecological and biological processes in the evolution and development of Asia＇s characteristic marine and insular ecosystems, both tropical and subtropic. The nominated property is a high biodiversity center with 3,860 species of plants and animals on islands and in the sea, of which 130 species are recorded on the Red Lists of Nationally and Internationally Threatened Species, and 76 species on the IUCN Red List of Globally Threatened Species. The iconic Cat Ba white-headed langur （Trachypithecus poliocephalus） is an endemic species indigenous to Cat Ba Archipelago where at present one population of 63 individuals only survives but nowhere else in the world. The Cat Ba white-headed langur is recognized as a critically endangered species facing an extremely high risk of extinction in the wild, thus needing urgent protection. The existence of another 20 endemic species in Cat Ba Archipelago shows that the process of evolution are on-going here, as new species continue to emerge in this unique archipelagic habitat.
文摘The 1.6GeV synchrotron of China Spallation Neutron Source(CSNS)project is a Rapid Cycling Synchrotron (RCS),which accelerates a high-intensity proton beam from 80MeV to 1.6GeV at a repetition rate of 25Hz.The RCS magnet system consists of 24 dipole magnets(main dipoles),48 quadrupole magnets(main quadrupoles),16 sextupole magnets,some tune shift quadrupoles and corrector magnets.All the magnets are of large aperture for a high beam power of 0.1MW,one design issue is the fringe field at pole end.And the main dipoles and main quadrupoles work at 25Hz repetition rate,the eddy current is an additional issue.In this paper the magnet design of the two kinds of main magnets will be described.
