兰州重离子加速器冷却储存环kicker磁铁设计

介绍了兰州重离子加速器冷却储存环(HIRFL-CSR)CSRm引出kicker磁铁的物理设计、参数计算以及结构设计和加工。为了减小电感,使上升时间达到要求,CSRm引出kicker磁铁采用分布式的传输线方案,同时将无感电容与磁铁并联以满足匹配的问题。磁铁用单匝线圈和铁氧体铁芯来降低电感、减少涡流损耗,并采取两台电源成对供电、导体一端共地的结构形式消除杂散电感和轴向场,这种方式不但消除了过桥的不利影响,而且可通过调节导体间距离方便的调节磁场均匀区宽度和磁铁电感。完成设计后磁铁电感小于1μH,在140 mm范围内磁场均匀度好于±0.5%,最高磁场达到0.038 T,最大峰值激磁电流约为2.5 kA。

HIRFL-CSR注入引出KICKER磁铁

以难度最大的快引出 KICKER磁铁为例 ,介绍了兰州重离子加速器冷却储存环注入引出 KICKER磁铁和电源设计的基本概念和所达到的指标

HIRFL-CSR Kicker电源控制器的设计

在HIRFL-CSR（兰州重离子冷却储存环）电源控制系统中，Kicker电源需要控制器提供高压充电电压基准电压信号和触发信号,采集基准电压信号，将电源充电电压与期望值进行比较，如果有偏差，则进行修正，使实际值与期望值一致。为Kicker电源设计的电源控制器采用DSP作为处理器，采用串行DAC为电源提供基准电压波形，基准电压信号回读用并行ADC来完成。论文首先简要介绍了Kicker电源系统，根据控制器的设计要求，选用TI公司的TMS320VC5402芯片，给出了控制器的总体设计。其次，具体介绍了TMS320VC5402的结构、外围设备，给出了电路设 计原理图，以及与存储器连接电路图，并分别介绍了硬件系统各个部分的电路设计以及FPGA部分设计。再次，介绍了DSP编程环境CCS，给出了FLASH擦写过程以及二次下载原理，并详细论述了基准电压信号发送的编写，并对回读的基准电压信号进行了滤波处理。最后，对电源控制器的设计进行了总结。论文完成了Kicker磁铁电源控制器的硬件设计和底层软件设计，为以后在该硬件平台上下一步工作打下了坚实的基础

Kicker电源数字延迟线及低压监测系统设计

踢轨磁铁（Kicker）电源系统是HIRFL-CSR注入引出系统中实现快引出的一个关键元件，主要功能是为踢轨磁铁提供快脉冲励磁电流以产生所需要的快脉冲磁场。Kicker电源提供的是高电压大电流的快脉冲，电流脉冲上升沿和下降沿为150ns,脉冲宽度为650ns,其脉冲峰值电流为2700A，工作周期为10s-17s。因此及时监控Kicker电源闸流管的工作状况以及电流脉冲波形特性至关重要。本文针对踢轨磁铁（Kicker）电源的需要，进行了Kicker电源监测系统的设计，主要针对闸流管误漏导通检测、电流脉冲宽度过宽过窄检测、脉冲宽度测量及脉冲计数等功能提出了电路的工作原理，并设计了具体电路。系统输入端采用光纤接口，而输出端采用了PLC数字I/O接口。由于采用PLC接收监测电路板的信号来完成对Kicker电源的监控报警，基于此编写了相关PLC程序，并调试通过。该监测系统电路板已调试完成，可以很好地完成对Kicker电源系统较为全面的状态监测，方便地对Kicker电源系统状态进行监控。另外，为了解决Kicker电源系统脉冲同步的问题，以满足兰州重离子加速器冷却储存环（HIRFL-CSR）环踢轨磁铁（Kicker）电源对电流脉冲进行适当延迟的要求，还分别设计了ECL高速可程控数字延迟线电路系统和基于CPLD的数字延迟线系统，分析介绍了数字延迟线系统结构、工作原理及PCB版图设计等。ECL高速可程控数字延迟线电路已初步调试通过，而基于CPLD的数字延迟线系统已完成了程序编程及仿真工作，它克服了ECL数字延迟线不能实现零延迟的缺点，且可以通过修改VHDL程序来设置出更多位的可编程数字延迟线，方便灵活

Kicker电源数字延迟线及低压监测系统设计

踢轨磁铁（Kicker）电源系统是兰州重离子加速器冷却储存环（HIRFL-CSR）注入引出系统中实现快引出的一个关键元件，主要功能是为踢轨磁铁提供快脉冲励磁电流以产生所需要的快脉冲磁场。踢轨磁铁（Kicker）电源系统各触发脉冲是否同步关系到束流能否顺利注入引出以及有好的束流品质。基于此，本文介绍了基于CPLD-EPM1270T144的数字延迟线系统，以满足HIRFL-CSR踢轨磁铁（Kicker）电源对触发脉冲进行适当延迟的要求；分析介绍了数字延迟线系统结构、工作原理、PCB制版及系统调试。实际检验证明本设计通过修改VHDL程序来调节延迟时间能够方便灵活的完成Kicker电源系统对脉冲同步的要求，延迟精度达到10ns。另外，由于Kicker电源提供的是高电压大电流的快脉冲，电流脉冲上升沿和下降沿为150ns、脉冲宽度为650ns,其脉冲峰值电流为2700A、工作周期为10s-17s，因此及时监控Kicker电源闸流管的工作状况以及电流脉冲波形特性非常重要。基于此，本文还进行了Kicker电源监测系统的设计。该设计主要针对闸流管误漏导通检测、电流脉冲宽度过宽过窄检测、脉冲宽度测量及脉冲计数等功能提出了电路的系统结构、工作原理，并完成了程序编程、仿真及外围电路设计

Calculation Methodology and Fabrication Procedures for Particle Accelerator Strip-Line Kickers: Application to the CTF3 Combiner Ring Extraction Kicker and TL2 Tail Clippers

A particle accelerator is any device that, using electromagnetic fields, is able to communicate energy to charged particles (typically electrons or ionized atoms), accelerating and/or energizing them up to the required level for its purpose. The applications of particle accelerators are countless, beginning in a common TV CRT, passing through medical X-ray devices, and ending in large ion colliders utilized to find the smallest details of the matter. Among the other engineering applications, the ion implantation devices to obtain better semiconductors and materials of amazing properties are included. Materials supporting irradiation for future nuclear fusion plants are also benefited from particle accelerators. There are many devices in a particle accelerator required for its correct operation. The most important are the particle sources, the guiding, focalizing and correcting magnets, the radiofrequency accelerating cavities, the fast deflection devices, the beam diagnostic mechanisms and the particle detectors. Most of the fast particle deflection devices have been built historically by using copper coils and ferrite cores which could effectuate a relatively fast magnetic deflection, but needed large voltages and currents to counteract the high coil inductance in a response in the microseconds range. Various beam stability considerations and the new range of energies and sizes of present time accelerators and their rings require new devices featuring an improved wakefield behaviour and faster response (in the nanoseconds range). This can only be achieved by an electromagnetic deflection device based on a transmission line. The electromagnetic deflection device (strip-line kicker) produces a transverse displacement on the particle beam travelling close to the speed of light, in order to extract the particles to another experiment or to inject them into a different accelerator. The deflection is carried out by the means of two short, opposite phase pulses. The diversion of the particles is exerted by the integrated Lorentz force of the electromagnetic field travelling along the kicker. This Thesis deals with a detailed calculation, manufacturing and test methodology for strip-line kicker devices. The methodology is then applied to two real cases which are fully designed, built, tested and finally installed in the CTF3 accelerator facility at CERN (Geneva). Analytical and numerical calculations, both in 2D and 3D, are detailed starting from the basic specifications in order to obtain a conceptual design. Time domain and frequency domain calculations are developed in the process using different FDM and FEM codes. The following concepts among others are analyzed: scattering parameters, resonating high order modes, the wakefields, etc. Several contributions are presented in the calculation process dealing specifically with strip-line kicker devices fed by electromagnetic pulses. Materials and components typically used for the fabrication of these devices are analyzed in the manufacturing section. Mechanical supports and connexions of electrodes are also detailed, presenting some interesting contributions on these concepts. The electromagnetic and vacuum tests are then analyzed. These tests are required to ensure that the manufactured devices fulfil the specifications. Finally, and only from the analytical point of view, the strip-line kickers are studied together with a pulsed power supply based on solid state power switches (MOSFETs). The solid state technology applied to pulsed power supplies is introduced and several circuit topologies are modelled and simulated to obtain fast and good flat-top pulses.

Chuck Male, Notre Dame Kicker, M Football, 1979 Notre Dame game

[Male kicked four field goals in 12-10 Notre Dame win]

Estrazione adiabatica di un fascio di particelle mediante modulazione di un kicker

Il lavoro qui proposto si sviluppa nelle seguenti parti: una breve analisi dei fenomeni coinvolti, quali la risonanza e l'invarianza adiabatica, quindi sarà studiato il problema dell'estrazione adiabatica di un fascio mediante un modello hamiltoniano semplificato che simula l'effetto di un kick dipolare.

重离子加速器中的软件无线电应用

This paper primarily elaborates automatic gain control design method in software radio receiver. It mainly uses in-phase and quadrature components quadratic sum to subtract the expectation of the output power to get the error statistic of the plus. The error statistic of the plus is smoothed by first order digital filter, and then is used to gain the output signals of controller. Thereby, it can make the system work well in certain dynamic region area of signals. It is designed for the Cooling Storage Ring ...中文文摘：本文主要阐述了软件无线电接收机中的相干AGC设计,主要利用了同相和正交支路的平方和与所期望的信号输出功率值相减,得到增益的误差统计量。该误差统计量经过一阶数字滤波器平滑,然后用于控制器输出信号的增益,从而使系统在一定的信号动态范围内都能工作。该设计主要用于兰州重离子加速器冷却存贮环的主环(CSRm)的重离子束团踢轨(Kicker System)的精确控制。

新型软件无线电正交同步采样方法

本文主要阐述了新型的软件无线电I、Q两路同步采样方法,主要利用了平方律部件、一阶环路滤波器和NCO来对I、Q两路采样时间差的进行闭环控制,实现了实时同步采样,降低了对AD芯片采样速率要求,同时也为后续的基带信号处理提供了方便。该设计主要用于兰州重离子加速器冷却存贮环的主环(CSRm)的重离子束团踢轨(Kicker System)的精确控制。

基于现场可编程门阵列的束流快引出控制系统设计

为实现兰州重离子冷却储存环主环束流的快引出,采用一种基于现场可编程门阵列(FPGA)的引出控制系统。在FPGA单元设计中,采用数字倍频技术来实现对Kicker磁铁在1个高频周期内充放电时间的精度控制。经测试,该控制系统对存储环中运行束流位置的跟踪可调节时间步长为5 ns。当高频频率为1.4 MHz时,在0~360°范围内可实现约2.5°相位精度的Kicker触发。

HIRFL-CSR complex

The construction and commissioning of HIRFL-CSR were finished in 2007. From 2000 to 2005 the subsystem and key devices of CSR were successfully fabricated, such as magnet, power supply, UHV system, e-cooler, electric-static deflector with the septum of 0.1 mm, and the fast-pulse kicker with the rise time of 150 ns. After that the CSR commissioning activities were performed in 2006 and 2007, including the accumulation of those heavy ions of C, Ar, Kr and Xe by the combination of stripping injection (STI) or multiple multi-turn injection (MMI) and e-cooling with a hollow e-beam, wide energy-range synchrotron ramping by changing the RF harmonic-number at mid-energy, the beam stacking in the experimental ring CSRe, the RIBs mass-measurement with the isochronous-mode in CSRe by using the time-of-flight method, and the ion beam slow-extraction from CSRm.