The frequency spectrum of turbulence measured by common micro-temperature sensor is mostly below 20 Hz, which can not show the high frequency characteristics of atmospheric temperature fluctuation.This paper introduces the design

The sounding balloons released from Korla, Maoming, Guangdong and Lhasa, Tibet, have been used to measure the profiles of temperature, air pressure and wind velocity and the refractive index structure constants of the atmosphere.B

The initial damage and damage growth of fused quartz optical elements irradiated by fundamental frequency, double frequency and triple frequency lasers alone and at the same time are studied comparatively. The effects of fundament

For the shortcomings of unknown mode purity and apparently ambiguous design idea in the literature (Danilov,2007), an improved rotating high-order mode generator based on the helically-distributed perforation (HDP) technique is pr

Improving antenna performance at low frequency is the focus of TEM horn antenna research. A new TEM horn antenna was designed by analyzing the impedance gradient and time-domain radiation characteristics of the antenna, to solve t

A machine learning based evaluation method for shielding effectiveness(SE) of loaded metallic enclosures with apertures under electromagnetic wave radiation is proposed. The SEs of a variety of metallic enclosures loaded with diff

An efficient field-to-line coupling method in the time-domain is developed based on the waveform relaxation (WR) techniques for evaluating the electromagnetic(EM) transient response of multiconductor transmission lines (MTLs) exci

For diplexer with high isolation and wideband in wireless communication system, in this paper, the diplexer specification is divided into Tx and Rx filter specifications with a certain margin. Then the wideband Tx and Rx filter is

In order to apply the complex physical model of millimeter-wave noise of nano-MOSFET to engineering design, the expression of its compact model is studied. The complex noise physical model is simplified by transforming and analyzi

In this paper, a cascade high voltage microsecond pulse power supply with output voltage of 20 kV is developed. The voltage level of a single module is 500 V, which reduces the insulation withstand high voltage requirements of the

In the simulation of the accelerator magnet support system, the parts connected to the ground by the magnet bracket are usually treated as “fixed”, but in some cases, this treatment will cause a large error between the simulation

In the design phase of BEPCII, the impedance is limited in terms of beam instabilities and parasitic mode loss. However, the parasitic mode loss has been one of the unfavorable factors affecting high beam current operation of BEPC

A new beam loss monitor system based on embedded EPICS is developed for the top-off upgrade of HLS-Ⅱ, to monitor the position and value of beam loss of storage ring. The electron shower signals are obtained by the double PIN photo

To improve the measurement accuracy of peak power meter of BEPCII linear accelerator, further reduce the response time of reflection protection alarm and provide real-time waveform detection means, the RF detector chip based on in

Taking BEPCII superconducting RF (SRF) cavity as an example, this paper analyzes several common causes of the SRF cavity failure, including hardware failure of RF system, beam loss and mechanical failure of the tuner, by combining

Aimed to prove the capture efficiency of ion source injected Interdigital H mode (IH) cavity, a short linac is under construction in Institute of Fluid Physics, CAEP. Protons could be accelerated from 0.04 MeV to 2.4 MeV with this

China fusion engineering test reactor(CFETR) is a magnetic confinement fusion device designed, which used high current magnetic field in the superconducting coil to generate high intensity magnetic field, thus constraining the hig

To investigate 4H-SiC detector’s resistance to gamma irradiation, the detector was irradiated by 60Co gamma-ray(about 4×105 Ci), and the maximum cumulative dose was 1 MGy. The detector’s I-V characteristics and its performance in

An extended interaction klystron (EIK), which is composed of an input cavity and an output cavity both based on 8 periods of staggered double rectangular waveguide structure (SDRWS) and an intermediate cavity based on 6 periods of

Micro-electroforming is a key step of terahertz all-metal devices microfabrication, in which metal-ion deposit uniformity determines the grating’s quality. Meanwhile, the deposit uniformity is influenced by the distribution of cur