Operational Experience at the S-DALINAC A
Operational Experience at the S-DALINAC A
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S-DALINAC A 的运营经验
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
A. Richter
中科院分区：
文献类型：
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作者：
A. Richter
将介绍超导达姆施塔特电子直线加速器（S-DALINAC）的现状、运行经验和未来前景，该加速器是领先的超导电子加速器之一。 S-DALINAC 是一款 S 波段连续波再循环机器，最大能量为 130 MeV。来自电子枪和预加速管的 250 keV 电子束的加速是通过 =0.85、2 单元捕获部分以及随后的 =1、5 单元和十个 20 单元腔来实现的。目前所有12个超导铌腔的空载Q值范围为8·10至2·10，而所有梯度都超过5MV/m，一些腔达到10MV/m。除了本身是一个研发项目之外，S-DALINAC 自从为一项雄心勃勃的核物理和辐射物理实验计划委托了大约 11000 小时的束流时间以来，已经生产了 S-DALINAC。常规使用的电子束能量范围为 3 至 120 MeV，电流高达 60 A，能量分布为 2:5 × 10 4，发射度为 n = 2 mmmrad。最近，安装了许多新的光束诊断站，使用过渡辐射来确定横向和纵向光束参数。最近，电子束长度被确定为 4 ps，每束电荷为 4 pC，重复频率为 10 MHz。 S-DALINAC 也是近红外自由电子激光器 (FEL) 的驱动器。在观察到自发发射之后，预计很快就会出现受激发射。
A report on the status, the operational experience and the future perspectives of the superconducting Darmstadt electron linear accelerator (S-DALINAC) one of the pioneering superconducting electron accelerators will be presented. The S-DALINAC is an S-Band cw recirculating machine with a maximum energy of 130 MeV. Acceleration of the 250 keV electron beam from the gun and a preacceleration tube is achieved by a =0.85, 2-cell capture section followed by a =1, 5-cell and ten 20-cell cavities. Unloaded Q values of all twelve superconducting Niobium cavities presently range from 8 10 to 2 10, while all gradients exceed 5 MV/m, some cavities reach 10 MV/m. Besides being an R&D project itself the S-DALINAC has produced since commissioning some 11000 hours of beam time for an ambitious experimental program in nuclear and radiation physics. Electron beams variable in energy from 3 to 120 MeV with currents up to 60 A, an energy spread of 2:5 10 4 and an emittance of n = 2 mmmrad are employed routinely. Lately, numerous new beam diagnostics stations have been installed using transition radiation to determine the transverse and longitudinalbeam parameters. Recently, the electron bunch length was determined as 4 ps with a charge of 4 pC per bunch at 10 MHz repetition rate. The S-DALINAC is also the driver of a Free Electron Laser (FEL) in the near IR. After spontaneous emission has already been observed the demonstration of stimulated emission is soon expected.