利用介质阻挡电极结构，对1.01325×105Pa气压下空气间隙中的放电进行了实验研究，数值模拟计算了实验 条件下电子雪崩的发展过程. 结果表明：对于长度不大于2mm的空气间隙，可能实现辉光放电，对于长度不小于5mm的空气间隙，如果不能设法降低放电场强，放电必然是流注形式，不可能实现辉光放电，另外，实验结果未能验证“离子捕获”机理降低放电场强而实现辉光放电的正确性.

A supersonic nozzle for a 1.5-MA gas puff pinch was designed and the gas flow injected out from the nozzle was measured. A miniature ionization gauge was developed to measure the density profile of the gas shell and two pressure transducers were used for determining the Mach number of the gas flow. It was found that the gas flow is not distributed symmetrically about 0, the mean radius of the exit aperture, and the radial location for the peak of the density profile moves inwards as time goes on. When the plenum pressure is 5atm, the maximum line mass density measured was 43g/cm and the Mach number of the gas flow deduced from experiments is 4.3, which is close to the expectation: a line mass density of about 50g/cm and a Mach number higher than 4. The measurements indicate that if a plenum opens into a large dead volume via a finite opening valve in a gas-puff system it will not produce a steady-state solution. Then, any agreement between the measurements and the calculations based on the steady state should not be expected.

The cavity structure of the anode and the cathode of a pseudospark switch is an important factor for its performances. When the cathode has a cavity structure, the electric erosion on the cathode and anode is small and a concentric ring-shaped erosion pattern is observed at the central area around the apertures of both electrodes. Without the cathode cavity, the erosion becomes stronger, and the patterns become irregular and unstable. Several kinds of electrode structure have been designed and investigated. Among them, a unique cavity structure of intermediate floating electrode in pseudospark switch has a good performance. This configuration could reduce the erosion on the electrodes and increase the selfbreakdown voltage of the pseudospark switches up to 80kV. In this paper, we have studied the influence of the electrode structure on the erosion of the electrode and the selfbreakdown characteristic of the switches.

研制了一台五通道ROSS-FILTER-PIN软X射线能谱仪，能谱范围为0.28-1.56kev它由5个连续能段组成，每个能段的起止边由罗斯滤片对（ROSS-FITERs）的L或K吸收边确定罗斯滤片对的厚度通过优化计算得到，为了使每个通道的灵敏区外响应（即所测能段外响应）与通道总响应之比最小，在滤片对的第二滤片上镀上了一定厚度的第一滤片材料；为了缩减滤片表面积以增强低能滤片的抗冲击能力及方便滤片加工，能谱仪采用了小探测面积的PIN探测器（1mm2）借助此能谱仪，测量得到了喷气式z箍缩（z-pinch）等离子体辐射软X射线能谱的分布，并研究了软X射线产额随箍缩状况的变化趋势。

A small neon gas-puff z-pinch device was constructed, and the plasma implosion and its radiation characteristics were studied experimentally. The plasma implosion was investigated using a three-frame Mach-Zehnder interferometer (TFMZI) that is capable of taking three pictures (5ns exposure and 13ns interpicture delay) within a single z-pinch shot. Thermopiles were also used in the experiments with the TFMZI to study the correlation between the total energy of x-ray emission and the plasma implosion. The ion beams from the z-pinch plasma were analysed using a compact Thomson spectrometer. Based on the experiments, the imploding velocity and electron density of the plasma shell were obtained, a conclusion that a nearly uniform and symmetric imploding plasma shell would emit a higher x-ray yield than an asymmetric one was drawn and the charge state resolved energy spectra of ion beams emitted from the z-pinch plasma were plotted.