Development of a fusion-oriented pulsed power module

Lin, Changxing; Zou, Wenkang; Zhou, Lei; Wang, Meng; Liu, Yu; Liu, Laqun; Deng, M.G; Liu, Dagang; Zhu, Jianping; Lian, K. T.; Wei, Bing; Tian, Qing; Guo, Fan; He, An; Shi, Feng; Xie, Weiping; Meng, Lin; Deng, Jianjun; Zhao, Yue; Zhang, Le; Li, Feng; Jiang, Jiali; Wang, Jie; Zhang, Yuanjun; Li, Yong; Dai, Yingmin; Han, Wenhua; Li, Ye; Yao, Bin; Ding, Yu; Kang, Junjun

doi:10.1103/physrevaccelbeams.22.030401

Cited by 25 publications

(8 citation statements)

References 41 publications

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“…A higher voltage is generated in the gap between electrodes 2 and 3 according to expressions (7) and (8) and taking into account the different polarity of the charging voltage (U 0 ) and the triggering voltage (U trig ) (time t 1 ). The voltage in this gap increases by a factor of more than 2.5, which leads to the breakdown of this gap.…”

Section: A Switchmentioning

confidence: 99%

“…The capacitive energy storage is divided into sections, each switched by its own gas spark switch. The number of switches can considerably exceed 10 4 in the newly developed petawatt-class LTDs [6][7][8]. The parameters of the primary energy storage device and LTD depend on the parameters of the switch, and studies of the different types of gas spark switch are therefore given special attention [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Multichannel switching in a multigap gas switch at atmospheric pressure

Zherlitsyn

Kumpyak

2020

Phys. Rev. Accel. Beams

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The multichannel switching mode of a controlled multigap switch is studied. The switch is designed for capacitive energy storage, with a charging voltage of up to 100 kV and an energy output time of about 100 ns. The interval between the high-voltage and low-voltage electrodes of this switch is divided into seven series-connected gaps using ball electrodes, and six parallel rows of these ball electrodes allow for multichannel switching. An optical system based on collimators and photodiodes was used to determine the number of channels in the switch gaps. Statistics on the number of channels were collected and the probability of ignition of parallel spark channels was calculated for each of the switch gaps under different operating conditions. We show that both the electrical isolation between the channels and the rate of rise of the triggering pulse significantly affect the number of parallel ignited channels and their distribution over consecutive gaps. At a high triggering voltage pulse rise rate (∼800 kV=μs), a larger number of spark channels are ignited in the switch with electrical isolation between the channels and the characteristics of this switch are better. At a low triggering voltage pulse rise rate (less than 250 kV μs), better characteristics are realized in the switch without electrical isolation between the channels.

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Section: A Switchmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multichannel switching in a multigap gas switch at atmospheric pressure

Zherlitsyn

Kumpyak

2020

Phys. Rev. Accel. Beams

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“…In recent years, many conceptual designs of Z-pinch accelerators using linear transformer drivers (LTD) [5,6] as a prime power source have been proposed [7][8][9][10][11]. To clearly observe how the pulsed-power components behave and predict the output electrical parameters before experiments, circuit simulation and analysis are very important.…”

Section: Introductionmentioning

confidence: 99%

Intelligent Optimization of Parameters for Tens of MA-Class Z-Pinch Accelerators

et al. 2022

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In order to minimize the initial energy storage of tens of MA-class Z-pinch accelerators, an intelligent optimization method was developed based on the transmission line code circuit model and PSOGSA algorithm. Using several input parameters, the four overall parameters of the Z-pinch accelerator could be fast determined, including the connection and parallel combination of LTD cavities, the outer radius of the stack-MITL system, and electrical length of monolithic radial transmission lines. The optimization method has been verified by comparing the results with the Z-300 and Z-800 conceptual designs. By means of this intelligent optimization, some factors that affect the initial energy storage on high-current Z-pinch accelerators have been investigated, such as the operating electrical fields, the diameter of the stack-MITL system, and the inner diameter of the LTD cavity. The suggestions for designing relatively low-cost, efficient LTD-based accelerators have been proposed.

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“…The recent development of linear transformer driver (LTD) technology provides a new method for constructing compact and flexible high-current pulsed accelerators that require no water tanks or vacuum insulator stacks [5]. Motivated by these advantages, researchers have recently proposed conceptual designs for LTD-based accelerators, such as the Z-IFE and ZP-3R systems (Sandia National Laboratories) [6,7] and the 5 and 50 MA systems (Chinese Academy of Engineering Physics) [8,9].…”

Section: Introductionmentioning

confidence: 99%

Investigation on current loss of high-power vacuum transmission lines with coaxial-disk transitions by particle-in-cell simulations

Luo¹,

ZHANG²,

LI³

et al. 2021

Plasma Sci. Technol.

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Coaxial-disk transitions can generate non-uniform magnetic fields and abrupt impedance variations in magnetically insulated transmission lines (MITLs), resulting in disturbed electron flow and non-negligible current loss. In this paper, 3D particle-in-cell simulations are conducted with UNPIC-3d to investigate the current loss mechanism and the influence of the input parameters of the coaxial-disk transition on current loss in an MITL system. The results reveal that the magnetic field non-uniformity causes major current loss in the MITL after the coaxialdisk transition, and the non-uniformity decreases with the distance away from the transition. The uniformity of the magnetic field is improved when increasing the number of feed lines of a linear transformer driver-based accelerator with coaxial-disk transitions. The number of input feed lines should be no less than four in the azimuthal distribution to obtain acceptable uniformity of the magnetic field. To make the ratio of the current loss to the total current of the accelerator less than 2% at peak anode current, the ratio of the current in each feed line to the total current should be no less than 8%.

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Development of a fusion-oriented pulsed power module

Cited by 25 publications

References 41 publications

Multichannel switching in a multigap gas switch at atmospheric pressure

Multichannel switching in a multigap gas switch at atmospheric pressure

Intelligent Optimization of Parameters for Tens of MA-Class Z-Pinch Accelerators

Investigation on current loss of high-power vacuum transmission lines with coaxial-disk transitions by particle-in-cell simulations

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