Development and applications of high-quality gyrotrons -Ultra high power gyrotrons and ultra high frequency gyrotrons-

高频，中功率陀螺仪（陀螺仪FU系列）实现了889千兆赫在第二谐波下的单模式操作（N=2）和频率步骤的最高可调性，使用基本、第二和第三谐波操作时达到了889千兆赫。输出功率在基本和七个十个watts在第二个谐波已经实现。As a result of the feedback control of the anode potential we succceeded to reduce the fluctuation level of the cw output power （f=301 GHz， P=20 W） from 3.7% to 1.5%。通量水平可以降低到0.6%，通过将阴极电位的通量水平降低到3 V.作为我们成功控制阳极电位的结果，以调制频率提高到20 kHz.转换系统的一个基本光学天线，两个椭圆聚焦反射镜和空间过滤器的序列。It is intended to convert four TE D21n D2 mode outputs of the Gyrotron FU IVA（TEイルD212イルD2，170GHz; TEイルD213イルD2，271GHz; TEイルD214イルD2，372GHz; TE D215 E D2， 472 GHz） into gaussian-like beams with wist size of wy D2x "E D2= wy D2y" E D2=16.3 mm as well as three TE D20n E D2 modes（TE型D202型D2， 223 GHz; TE型D203型D2， 323 GHz; D204，D2，423 GHz） into bigausian-like beams with waist sizes of wy D2x"wy D2 =23.5 mm and wy D2yo" wy D2= 16.4毫米与较早的系统相比，转换只能使用一种操作模式，其中一款小说更灵活，更可与频率可调谐的陀螺仪和陀螺仪FU兼容IVA。在空间过滤器上观察到光束的侧面特征的条纹中，图像源的大部分功率被空间过滤器转移到最后的侧翼。作为一个结果，可以在微米波幅范围内产生更高质量的光束。

High frequency, medium power gyrotrons (Gyrotrons FU series) achieved the highest frequency of 889 GHz for single mode operation at the second harmonic (N=2) and the frequency step-tunability from 38 to 889 GHz using the fundamental, second, and third harmonic operation. Output powers of several hundred watts at the fundamentals and several ten watts at second harmonics have been achieved.As a result of the feedback control of the anode potential we succeeded to reduce the fluctuation level of the cw output power (f=301 GHz, P=20 W) from 3.7% to 1.5%. The fluctuation level could be decreased down to 0.6% by reducing fluctuation level of the cathode potential below 3 V. As a result of the control of the anode potential we succeeded to modulate the gyrotron output with a modulation frequency up to 20 kHz.The conversion system consists of a quasi-optical antenna, sequence of two ellipsoidal focusing mirrors and a spatial filter. It is intended to convert four TEィイD21nィエD2 mode outputs of the Gyrotron FU IVA (TEィイD212ィエD2, 170 GHz; TEィイD213ィエD2, 271 GHz; TEィイD214ィエD2, 372 GHz; TEィイD215ィエD2, 472 GHz) into gaussian-like beams with waist size of wィイD2x"ィエD2=wィイD2y"ィエD2=16.3 mm as well as three TEィイD20nィエD2 modes (TEィイD202ィエD2, 223 GHz; TEィイD203ィエD2, 323 GHz; TEィイD204ィエD2, 423 GHz) into bigaussian-like beams with waist sizes of wィイD2x"ィエD2 =23.5 mm and wィイD2yo"ィエD2=16.4 mm. Compared with the earlier system capable of converting only one operating mode the novel one is more versatile and is compatible with frequency tunable gyrotrons such as the Gyrotron FU IVA. In spite of the truncation of the sidelobes of the beam by the spatial filter most of the image source power is transferred to the final waist. As a result, intense high-quality beams in the submillimeter wavelength range can be produced.