JLC/NLC项目的注入式直线加速器包括预加速器、e+驱动直线加速器和$e- booster, and the $ e+助推器。前三台将是S波段机器，最后一台是L波段机器。我们已经证明，通过单独使用失谐在这些直线加速器的加速器结构设计中，我们将有可接受的公差发射度增长由于注入抖动和结构失调，对于标称（2.8ns）和交替（1.4ns）聚束间距。
英文摘要：
The injector linacs of the JLC/NLC project include the prelinac, the e+ drive linac, the $e- booster, and the $e+ booster. The first three will be S-band machines, the last one, an L-band machine. We have demonstrated that by using detuning alone in the accelerator structure design of these linacs we will have acceptable tolerances for emittance growth due to both injection jitter and structure misalignments, for both the nominal (2.8ns) and alternate (1.4ns) bunch spacings.
As a part of the ongoing XIIth plan project titled "R&D activities for high energy proton linac based spallation neutron source", the work on physics design of various subsystems of the injector linac and accumulator ring has been taken up at RRCAT, Indore. For the 1 GeV H- injector linac, physics design studies of individual systems have been completed, and the end to end beam dynamics simulation studies have been performed to ensure that the stringent beam dynamics criteria are satisfied for the optimized lattice. Physics design studies to optimize the linear lattice of the accumulator ring …
Using the China Spallation Neutron Source (CSNS) linac as the injector, a 500 MeV proton synchrotron is proposed for multidisciplinary application, such as biology, material and proton therapy. The synchrotron will deliver proton beam with energy from 80 MeV to 500 MeV. A compact lattice design was worked out, and all the important beam dynamics issues were investigated. The 80 MeV H- beam is stripped and injected into the synchrotron by using multi-turn injection. In order to continuously extraction the proton with small beam loss, the achromatic structure is proposed and slow extraction meth…
拟议的Next Linear Collider包含大量的直线加速器RF系统，对宽带速调管调制和精确的RF矢量检测提出了新的要求。该系统将能够自动定相每个速调管和补偿束流加载效应。加速器结构对准是通过使用与用于测量加速器RF的接收器类似的接收器检测射束诱导偶极模式来确定的，并且被并入RF系统拓扑中。本文介绍了拟议的系统设计，信号处理技术，并包括初步的测试结果。
Significant transient beam loading effects were observed during beam commissioning tests of prototype II of the injector for the Accelerator Driven Sub-critical (ADS) system, which took place at the Institute of Modern Physics, Chinese Academy of Sciences, between October and December 2014. During these tests experiments were performed with CW operation of the cavities with pulsed beam current, and the system was configured to make use of a prototype digital low level radio frequency (LLRF) controller. The system was originally operated in pulsed mode with a simple PID feedback control algorit…
Commissioning of the 1.4 Mev/u High Current Heavy Ion Linac at Gsi
Wideroe型Unilac预剥离器直线加速器的拆卸于1999年初进行。必须获得SIS中最重元素的粒子数增加两个数量级以上。从那时起，新的高电流注入器（HSI）由H型整流器和DTL结构组成，用于双束操作，并成功调试。高电荷注入器（HLI）在此期间提供主直线加速器。同时完成射频发射器和射频结构的调节和运行。HSI调试策略包括在每个运输和加速段之后使用多功能诊断测试台进行束流调查。将讨论LEBT、超透镜、IH槽I和II以及剥离段之后的广泛调试测量结果（例如横向发射度、束流宽度、束流传输）。使用来自MUCIS离子源的40 Ar 1+束来填充直线加速器直到理论空间电荷极限。1999年11月开始进行例行作业。
A Hybrid single cavity (HSC) linac, which is formed by combining a radio frequency quadrupole (RFQ) structure and a drift tube (DT) structure into one interdigital-H (IH) cavity, is fabricated and assembled as a proof of principle (PoP) type injector for cancer therapy synchrotron according to the series researches. The injection method of the HSC linac adopt a direct plasma injection scheme (DPIS), which is considered to be the only method for accelerating an intense current heavy ion beam produced by a laser ion source (LIS). The input beam current of the HSC was designed to be 20 milliamper…
Particle-in-cell simulations were performed by using PARMELA to characterise an electron injector with a booster linac for the AWAKE project in order to provide the baseline specifications required by the plasma wakefield experiments. Tolerances and errors were investigated. A 3 GHz travelling wave structure designed by using CST code. Particles were tracked by using the field maps acquired from these electromagnetic simulations. These results are pre- sented in comparison with the generic accelerating structure model within PARMELA.
The PLS-II has a 100 MeV pre-injector for the 3 GeV Linac. A thermionic gun produces electron charge of 200 pC with a bunch duration of 500 ps by a 250 ps triggering pulser. At the pre-injector, one of the most important beam parameters to identify the beam quality is a transverse emittance of electron bunches. Therefore we measure the beam emittance and twiss functions at 100 MeV in order to match the beam optics to beam transport line and go through it to the storage ring. To get the transverse emittance measurement, well-known technique, quadrupole scan, is used at the pre-injector. The emi…
The Fermilab Proton Improvement Plan (PIP) was formed in late 2011 to address important and necessary upgrades to the Proton Source machines (Injector line, Linac and Booster). The goal is to increase the proton flux by doubling the Booster beam cycle rate while maintaining the same intensity per cycle, the same uptime, and the same residual activation in the enclosure. For the Linac, the main focus within PIP is to address reliability. One of the main tasks is to replace the present hard-tube modulator used on the 200 MHz RF system. Plans to replace this high power system with a Marx-topology…
