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Development of Multibunch Beam Energy Compensation System

多束束能量补偿系统的研制

基本信息

批准号：
09640379
负责人：
TAKEDA Seishi
金额：
$ 1.92万
依托单位：
High Energy Accelerator Research Organization
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640379/
关键词：
Linear collider multibunch beam energy compensation phase modulation amplitude modulation delta-F ATF emittance growth OF マルチバンチ

项目摘要

The development of multibunch beam energy compensation method is held in ATF(Accelerator Test Facility) of the high energy accelerator research organization as an one of key technology of linear collider developments. The if phase modulation method for multibunch energy compensation is the most feasible method, so the development research to apply this method was proceeded. It is possible to reduce the emittance growth arising from the effect of dispersion and chromatic effect to its minimum, because of structure by structure of energy compensation.In 1997, the first year of this reseach, the design and fabrication of the high power if combiner to combine the output power of two klystrons were done, The high power test of the if combiner was held at ATF klystron system with rearranged wave guide system in order to combine two klystrons output. The system was processed upto 50MW klystron output level and proved the performance of phase-to-amplitude modulation at high power level.In 1998, the second year, the beam test was held at ATE linac. The arbitoraly waveform generator is installed in the phase moduration control pulse. In ATE linac, the sichane magnet configuration is install in the middle of linac in oider to make multibunch energy measurement. In order to optimize the if amplitude variation slope, the phase moduration speed at low-level if for each klystron was surveyed, By using these instruments and careful adjustment, we could succeed to compensate the beam energy difference in ATE multibunch (20 bunch, 2.8ns spacing). This experiment proved that the phase-to amplitude moduration method is applicable for the multibunch energy compensation.This two years research makes it possible that the phase-to-amplitude moduration method is effective to compensate multibunch energy difference which will be a problem in future linear collider. Also we could know the if component which is need to develop for real application.

作为直线对撞机研制的关键技术之一，多束团能量补偿方法的研制是在高能加速器研究机构的加速器试验装置(ATF)中进行的。多束团能量补偿的中频相位调制方法是最可行的方法，为此进行了应用该方法的开发研究。由于能量补偿的逐个结构，可以将色散和色度效应引起的发射度增长减小到最小。1997年，本研究的第一年，完成了用于合成两个速调管输出功率的高功率中频合成器的设计和制造，为了合成两个速调管的输出，在ATF速调管系统上进行了中频合成器的高功率测试。该系统已加工到50兆瓦的速调管输出水平，验证了高功率水平下的调相调幅性能。1998年，第二年，在ATE直线加速器上进行了束流测试。任意波形产生器安装在调相控制脉冲中。在ATE直线加速器中，为了进行多束团能量测量，在加速器的中间安装了硅片磁铁结构。为了优化中频幅度变化斜率，测量了每个速调管在低能级中频的相位调制速度，通过这些仪器和仔细的调整，我们成功地补偿了ATE多束团(20束团，间距2.8 ns)中的束流能量差。本实验证明了调相调幅方法适用于多束团能量补偿，这两年的研究使调相调幅方法对未来直线对撞机中存在的多束团能量差补偿成为可能。也可以知道实际应用中需要开发的IF组件。