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The exact dynamics of a Jaynes-Cummings model for a qubit interacting with a continuous distribution of bosons, characterized by a special form of the spectral density, is evaluated analytically. The ...
Fabrication of the high power input coupler for BEPCⅡ superconducting cavities
high power input coupler fabrication superconducting cavity
2009/8/17
The BEPCII storage ring adopts two 500 MHz superconducting cavities (SCC). Each one is equipped with a 500 MHz input power coupler. The coupler is to feed 150 kW power in continuous wave (CW) mode wit...
Design of a capacitive main power coupler for RF superconducting accelerators
coupler capacitive coupling cold window coaxial line PKU FEL
2009/8/14
An updated main coupler has been designed for the superconducting accelerator of Free Electron Laser (FEL) project under construction in Peking University. A capacitive structure is chosen for the ma...
High power conditioning of the input coupler for BEPCⅡ superconductingcavity
high power input coupler high power conditioning superconducting cavity
2009/8/14
High power conditioning of the input coupler for BEPCII superconducting cavity has been performed. After room temperature conditioning, the RF power of 150 kW with continuous wave at standing wave mo...
Thermoelectric power and low-field electron mobility in AlxGa1-xN lattice-matched to GaN
Thermoelectric power optical phonon piezoelectric non-parabolicity relaxation-time
2010/4/8
The results of thermoelectric power and electron drift mobility in AlxGa1-xN lattice-matched to GaN are calculated for different temperatures, free-electron concentrations and compositions. The two-mo...
High-power InGaAs VCSEL’s single devices and 2-D arrays
VCSEL's 2-D arrays quantum well high power 980 nm
2011/12/15
We report on bottom-emitting vertical-cavity surface-emitting lasers (VCSEL’s) and laser arrays providing high output powers in the 980-nm wavelength regime. Single devices with active diameters of 50...
High-Power Diffusion Cooling Planar Waveguide CO2 Laser
CO2 Laser dielectric coaxial waveguide
2010/4/19
A diffusion-cooled CO2 laser using a coaxial waveguide is investigated theoretically. The resonator extracting the laser beam consits of two annular plane mirrors enclosing the two ends of the wavegui...