Ultrashort-pulse reflectometer performance on Sustained Spheromak Physics Experiment
Ultrashort-pulse reflectometer performance on Sustained Spheromak Physics Experiment
复制标题
超短脉冲反射计在持续 Spheromak 物理实验中的性能
DOI：
10.1063/1.1789604
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发表时间：
2004
影响因子：
1.6
通讯作者：
D. Hill
中科院分区：
文献类型：
--
作者：
C. Domier;N. Luhmann;Y. Roh;H. McLean;E. Hooper;D. Hill
持续Spheromak物理实验设备上的时间分辨密度分布图现在可以从超短脉冲反射计（USPR）诊断仪收集的数据自动生成，该诊断仪由跨越34-75 GHz的24个频率通道组成。 USPR定时电子和重建软件的升级，加上新的低噪声放大器和降低带宽的滤波器，大大降低了幅度和定时抖动，使同时密度分布和多层密度波动操作。介绍了升级后的USPR系统的硬件和软件组成，并给出了采样剖面和波动数据。提出了一种新的系统布局，可将USPR动态范围增加8-10 dB。
Time-resolved density profiles on the Sustained Spheromak Physics Experiment device are now generated automatically from data collected by an ultrashort-pulse reflectometry (USPR) diagnostic comprised of 24 frequency channels spanning 34–75 GHz. Upgrades in USPR timing electronics and reconstruction software, coupled with new low noise amplifiers and reduced bandwidth filters, have significantly decreased amplitude and timing jitter enabling simultaneous density profile and multilayer density fluctuation operation. Hardware and software components of the upgraded USPR system are described, and sample profile and fluctuation data are presented. A new system layout is proposed to increase the USPR dynamic range by 8–10 dB.