Highly ordered mesoporous silica HOM-5(cubic,Ia3d)with three-dimensional(3D)bicontinuous channels was fabricated under acidic condition via a direct-templating synthesis.Primary lyotropic liquid crystal mesophase of P...Highly ordered mesoporous silica HOM-5(cubic,Ia3d)with three-dimensional(3D)bicontinuous channels was fabricated under acidic condition via a direct-templating synthesis.Primary lyotropic liquid crystal mesophase of P123 was used as the template.The as-synthesized HOM-5 had thick walls of 15.0 nm.The mean pore diameter and specific surface area of the material were 5.7 nm and 500 m2·g-1,respectively.Results show that materials obtained from this simple synthesis are highly ordered with perfect meso-structures.The results of hydrothermal testing show that the as-synthesized silica retains Ia3d space group after refluxing in boiling water for 6 hours.展开更多
In this paper we will show a cavity and higher order mode （HOM） coupler designing scheme for the Circular Electron-positron Collider （CEPC） main ring. The cavity radio frequency （RF） design parameters are shown ...In this paper we will show a cavity and higher order mode （HOM） coupler designing scheme for the Circular Electron-positron Collider （CEPC） main ring. The cavity radio frequency （RF） design parameters are shown in this paper. The HOM power is calculated based on the beam parameters in the Preliminary Conceptual Design Report （Pre-CDR）. The damping results of the higher order modes （HOMs） and same order modes （SOMs） show that they reach the damping requirements for beam stability.展开更多
文摘Highly ordered mesoporous silica HOM-5(cubic,Ia3d)with three-dimensional(3D)bicontinuous channels was fabricated under acidic condition via a direct-templating synthesis.Primary lyotropic liquid crystal mesophase of P123 was used as the template.The as-synthesized HOM-5 had thick walls of 15.0 nm.The mean pore diameter and specific surface area of the material were 5.7 nm and 500 m2·g-1,respectively.Results show that materials obtained from this simple synthesis are highly ordered with perfect meso-structures.The results of hydrothermal testing show that the as-synthesized silica retains Ia3d space group after refluxing in boiling water for 6 hours.
基金Supported by National Natural Science Foundation of China(11175192)
文摘In this paper we will show a cavity and higher order mode （HOM） coupler designing scheme for the Circular Electron-positron Collider （CEPC） main ring. The cavity radio frequency （RF） design parameters are shown in this paper. The HOM power is calculated based on the beam parameters in the Preliminary Conceptual Design Report （Pre-CDR）. The damping results of the higher order modes （HOMs） and same order modes （SOMs） show that they reach the damping requirements for beam stability.
