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1 MW, 140 GHz, CW gyrotron for Wendelstein 7-X

机译：用于Wendelstein 7-X的1 MW，140 GHz，CW回旋管

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Summary form only given. A continuous wave, 1 MW, 140 GHz gyrotronoscillator with a CVD diamond window has been designed and constructedas a joint collaboration between FZK Karlsruhe, CRPP-Lausanne, IPFStuttgart, CEA Cadarache and TTE Velizy for the 10 MW ECRH system of thenew stellarator plasma experiment Wendelstein 7-X at IPP Greifswald,Germany. The gyrotron will operate in the T28,8 cavity modeand provides a linearly polarized, fundamental Gaussian output beam. Itis composed of a diode type electron gun, an improved beam tunnel, ahigh mode purity low-Ohmic-loss cavity with rounded transitions. Thedesign parameter for the cavity were chosen to minimize power reflectionand mode purity. The electron gun and the magnetic field are designedfor a velocity ratio of 1.3. The RF field is guided by an optimized nonlinear uptaper and converted to a Gaussian beam by a highly efficientquasi-optical mode converter consisting of a rippled wall waveguidelauncher followed by a mirror of quasi-elliptical shape and twotoroidally focussing mirrors. A large single stage depressed collectoron ground potential is capable to withstand the electron beam power incontinuous operation assuming a total efficiency of 45% which isachieved by a voltage of 30 kY to the cavity and -50 kV to the cathode.The RF beam is extracted from the gyrotron horizontally through anedge-cooled single-disk CVD-diamond window with an aperture of 88 mm anda disk thickness of 1.8 mm. With a loss tangent of 4.10-5 anda dielectric permittivity of 5.67, the absorbed power is only 700 W andthermal finite element computations a temperature rise of only 61° Cat the center of the window
机译：仅提供摘要表格。连续波1 MW 140 GHz回旋管 设计并制造了带有CVD金刚石窗口的振荡器 由FZK Karlsruhe，CRPP-Lausanne，IPF之间的联合合作 斯图加特，CEA Cadarache和TTE Velizy用于该项目的10 MW ECRH系统 IPP格赖夫斯瓦尔德的新型恒星等离子体实验Wendelstein 7-X， 德国。回旋管将以T 28,8 腔模式运行 并提供线性偏振的基本高斯输出光束。它 由二极管型电子枪，改进的电子束隧道， 高模纯度，低欧姆损耗腔，具有圆形过渡。这 选择空腔的设计参数以最大程度地减少功率反射 和模式纯度。电子枪和磁场设计 速度比为1.3。 RF场由优化的非 线性升级，并通过高效转换为高斯光束 由波纹壁波导组成的准光模式转换器 发射器，后跟一个准椭圆形的镜子和两个 环形聚焦镜。大型单级低压收集器 地电位能够承受电子束功率 连续运行，假设总效率为45％，这是 通过向模腔施加30 kY的电压和向阴极施加-50 kV的电压来实现。 通过回旋管水平地从回旋管中提取RF光束 边缘冷却的单盘CVD金刚石窗口，孔径为88 mm， 磁盘厚度为1.8毫米。损耗角正切为4.10 -5 并且 介电常数为5.67，吸收​​功率仅为700 W， 热有限元计算温度仅上升61°C 在窗口的中央

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