非线性传输线在DSRD脉冲电源中的应用

史晓蕾; 陈锦晖; 王冠文; 王磊; 刘鹏

doi:10.11884/HPLPB202335.230068

非线性传输线在DSRD脉冲电源中的应用

doi: 10.11884/HPLPB202335.230068

史晓蕾^1,,
陈锦晖^{1, 2},
王冠文¹,
王磊¹,
刘鹏¹

1.
中国科学院高能物理研究所加速器中心，北京 100049
2.
中国科学院大学核科学与技术学院，北京 100049

基金项目: 国家自然科学基金项目（11675194；11475200）

详细信息

作者简介:
史晓蕾，shixl@ihep.ac.cn

中图分类号: TL501
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出版历程
- 收稿日期: 2023-03-31
- 修回日期: 2023-07-20
- 录用日期: 2023-06-02
- 网络出版日期: 2023-07-28
- 刊出日期: 2023-10-08

Application of nonlinear transmission line in DSRD pulse generator

1.
Accelerator Division, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
2.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 加速器技术的发展，对注入引出系统的kicker脉冲电源提出了新的技术要求。注入引出系统冲击磁铁不仅要求脉冲电压高，底宽达到ns量级，还对波形的稳定性和前后残余电压有很高要求。漂移阶跃恢复二极管（DSRD）因其速度快、工作电流大等优点，在ns级脉冲电源中应用前景广泛，但其工作过程中会存在预脉冲等使脉冲波形偏离理想形态的因素。基于一种已有的DSRD脉冲电源，使用非线性传输线对脉冲进行整形，同时对脉冲的前后边沿进行锐化，缩短脉冲边沿的时间，大幅减小脉冲前后的残余电压，提高电源的性能。完成了一台电源样机的设计和实验，实验结果表明，该样机在50 Ω负载上产生的脉冲幅值约10 kV，前后边沿时间（10%~90%）约2 ns，底宽（3%~3%）小于8 ns。
- 带状线冲击器 /
- 纳秒脉冲电源 /
- 漂移阶跃恢复二极管 /
- 非线性传输线
Abstract: There is an increasingly higher requirement on the pulse source of kicker in the injection and extraction system with the development of accelerators. As a special nanosecond switch, Drift Step Recovery Diode (DSRD) has a great application prospect in pulse power technology for its notably short switching-off time and large working current. However, there are some factors such as pre-pulse that make the pulse waveform deviate from the ideal shape. A prototype of pulse generator was designed and tested. It is based on a basic DSRD circuit, at the same time, the Non-Linear Transmission Line (NTL) is used to shape the pulse, compress the edge and reduce the residual voltage. Its circuit experiment shows that the pulse amplitude on resistor load of 50 Ω is about 10 kV, the rise time and fall time are about 2 ns (10%−90%) and the bottom width (3%−3%) is less than 8 ns.
- strip-line kicker /
- nano-second pulser /
- DSRD /
- non-linear transmission line

HTML全文

图 1 一种PFL的DSRD脉冲电源电路原理图

Figure 1. Simplified scheme of the DSRD pumping circuit with inductor energy

下载: 全尺寸图片幻灯片

图 2 图1所示DSRD脉冲电源的输出波形

Figure 2. Pulse output of DSRD pumping circuit（2 kV/div，40 ns/div）

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图 3 非线性传输线的结构

Figure 3. Structure of the NTL (cross section)

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图 4 铁氧体非线性传输线锐化脉冲边沿原理

Figure 4. Process of the stable shock wave in ferrite NTL

I₀: amplitude of current; v₀: velocity of incident wave; τ₀: the front edge of incident wave; v_p: velocity of shock wave

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图 5 利用非线性传输线对脉冲整形的电路原理

Figure 5. Simplified scheme of the pulse generator

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图 6 脉冲电源实验电路

Figure 6. Prototype of the pulse generator

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图 7 使用非线性传输线整形后的脉冲波形

Figure 7. Test waveform with NTLs（2 kV/div，10 ns/div）

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表 1 DSRD主要特征参数

Table 1. Main parameters of DSRD

parameter	test conditions	limit
parameter	test conditions	min	max
forward voltage V_f/V	I_f=10 mA	−	8
pulse voltage V_p/kV	I≥300 A	10	−
pulse current I/A	V_p≥10 kV	300	−
pulse edge t_r/ns	V_p=10 kV	−	3
operating frequency f_r/kHz	V_p=10 kV，t_r≤3 ns	10	−

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表 2 非线性传输线的主要参数

Table 2. Main parameters of NTL

inner diameter of ferrite/mm	outer diameter of ferrite/mm	inner diameter of outer conductor/mm	length of NTL₁/mm	length of NTL₂/mm
1.65	3.0	8	160	110

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表 3 电源输出脉冲的参数

Table 3. parameters of output pulse

	peak voltage/kV	rise time (10%-90%)/ns	fall time (10%-90%)/ns	bottom width (3%-3%)/ns
without NTLs	12.9	4	8	＞20
with NTLs	9.5	2	2	＜8

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