Analysis of operation models and tailored-pulse model of PTS

Minghe, 夏明鹤 Xia; Ji, 计策; Yujuan, 王玉娟 Wang; Meng, 王勐 Wang; Feng, 李逢 Li; Shuping, 丰树平 Feng; Weiping, 谢卫平 Xie

doi:10.3788/hplpb20122411.2768

强激光与粒子束

2012

DOI: 10.3788/hplpb20122411.2768

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Analysis of operation models and tailored-pulse model of PTS

夏明鹤 Xia Minghe¹,

计策 Ji²,

王玉娟 Wang Yujuan³

et al.

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Current pulse shaping of the load current on PTS

Minghe

et al. 2016

AIP Advances

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The typical rise time of PTS machine is ∼110 ns with about 10 MA peak current under short pulse mode when all 24 modules discharge simultaneously. By distributing the trigger times of 12 laser beams logically and adjusting the statues of the pulse output switches, longer rise-time pulse can be obtained on the PTS facility. Based on the required pulse shape, whole circuit simulations will be used to calculate the trigger times of each laser triggering gas switch and the status of the pulse output switches. The rise time of the current is determined by the time difference between the first and last trigged laser triggering gas switches. In order to trigger the laser triggering gas switch, sufficient laser power is needed to be sent into the gap of the gas switches. The gas pressure and voltage difference on the two electrodes of the gas switches also affect the triggering of the gas switches, and the voltage added on the gas switch is determined by its transition time. Traditionally the trigger time difference should be less than the transition time of the two neighboring modules. A new simulation model of PTS shows one can break this transition time limits. Series of current pulse shaping experiments have been investigated on the PTS (Primary Test Stand). As results, more than 5 MA peak current were successfully achieved on the load with a rise time of 600 ns. This study and experiments of the pulse shaping on PTS demonstrate the adaptable ability of the PTS for offering different waveform of mega ampere current pulse for different research purpose.

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Current pulse shaping of the load current on PTS

Minghe

et al. 2016

AIP Advances

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Recent advances in hyper-velocity flyer launch experiments on PTS

Wang¹,

Guo²,

Zhao-Wu³

et al. 2014

Acta Phys. Sin.

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Magnetically driven loading technology is to load the large pulse current to the test area through the pulsed power, which forms a smooth magnetic pressure rising over time to achieve a quasi-isentropic compression of sample and hyper-velocity flyer launch. Based on the output characteristics and parameters of PTS accelerator, two types of hyper-velocity flyer launch experiments with different load configurations, such as the load, flyer plates size, current waveform and diagnostic systems etc, are designed and tested. LY12 aluminum flyer plates with dimensions of 10 mm0.725 mm was launched by single-sided stripline load configuration to 11.5 km/s while the magnetic drive load pressure is near 0.9 10^5 MPa. Simulation and experimental results agrees well with those of in the flyer launch process and the ultimate velocity. Further simulation shows that the launch velocity of aluminum flyer plates with dimensions of 8.5 mm1 mm is expected to exceed 15 km/s under the program of optimizing the structural parameters and regulation. The design and experiment technology of hyper-velocity flyer launch based on multi-branch pulsed power generator has been mastered during the designs and experiments.

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Analysis of operation models and tailored-pulse model of PTS

Cited by 2 publications

References 0 publications

Current pulse shaping of the load current on PTS

Current pulse shaping of the load current on PTS

Recent advances in hyper-velocity flyer launch experiments on PTS

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