摘要
根据现有磁体条件和工艺设计了一过渡区较长的倒向磁场系统,其主磁场为0.396T,反向磁场为-0.033T,并给出了一种实用8mm三次谐波潘尼管电子枪的设计结果。该大回旋电子枪工作在43.5kV,1.45A下,阴极可置于轴向磁场幅值渐减区域。该结构电子枪不追求在通过反转点之前形成薄的环形电子束,不利用突变倒向磁场,不需要刻意控制磁力线与电子注包络走向的一致性,显著降低了调试的难度和要求。最终优化所得电子注的纵向速度零散为4.78%,偏心率为7.18%,速度比高达2.2,而速度比的零散仅为4.88%,满足三次谐波潘尼管的要求。经大信号模拟计算,在该电子枪驱动下,潘尼管器件功率可达31.9kW,效率高达49.4%,总体参量仍具有吸引力且建立在可实现的电子光学系统基础上。
According to current magnetic and processing conditions,a gradually-changing reversal magnetic system and a practical 8 mm third-harmonic peniotron electron gun are designed.This large-orbit electron gun is designed under the operating voltage of 43.5 kV,and operating current of 1.45 A,and its cathode can be located in the axial magnetic field where its magnitude decreases gradually.It does not demand the consistency between the field lines and the contour of the beam trajectories,which reduces the design requirements and difficulty greatly.After optimization,an axis-encircling electron beam with an axial velocity spread of 4.78%,a guiding center deviation ratio of 7.18% and a velocity ratio of 2.2 is obtained,which satisfies the requirements of the third-harmonic peniotron.The large-signal simulation shows that,driven by the electron gun,the peniotron can achieve an output power of 31.9 kW with the efficiency up to 49.4%.This is an attractive result in laboratory platform.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2012年第7期1569-1574,共6页
High Power Laser and Particle Beams
基金
国家自然科学基金项目(60971035)
关键词
8mm三次谐波潘尼管
缓变倒向磁场
大回旋电子枪
电子注质量
8 mm third-harmonic peniotron
gradually-changing reversal magnetic field
large-orbit electron gun
electron beam quality
