A low-power laserwire profile monitor for H- beams: Design and experimental results
A low-power laserwire profile monitor for H- beams: Design and experimental results
复制标题
H 型钢低功率激光线轮廓监测仪：设计和实验结果
DOI：
10.1016/j.nima.2018.06.035
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
Hofmann T
中科院分区：
文献类型：
--
作者：
Hofmann T
一种非破坏性测量H-梁横向轮廓的仪器已经在CERN的新LINAC 4上开发和测试。在束流调试能量为50、80和107 MeV时，测量了H-束流的垂直剖面。该仪器由一个耦合到光纤的激光源组成，将峰值功率为数百瓦的激光脉冲传送到加速器隧道，激光束在那里水平聚焦到H−光束上。由于光分离，电子从离子中释放出来，并且可以通过弱偶极场偏转到金刚石检测器上。通过垂直扫描激光束穿过H-束并记录每个位置到达电子的数量来获得束轮廓。应描述新型仪器的设计、实施和表征，并将测量的射束轮廓与SEM网格和线扫描仪获得的轮廓进行比较。
An instrument to non-destructively measure the transverse profile of an H−beam has been developed and tested at CERN’s new LINAC4. The vertical profile of the H−beam has been measured, at beam commissioning energies of 50, 80 and 107 MeV. The instrument consists of a laser-source which is coupled to an optical fibre, delivering laser pulses with hundreds Watts of peak power to the accelerator tunnel, where the laser beam is focused horizontally onto the H−beam. Due to photo-detachment, electrons are liberated from the ions and can be deflected by a weak dipole field onto a diamond detector. The beam profile is obtained by scanning the laser beam vertically across the H−beam and recording for each position the number of arriving electrons. The design, implementation and characterisation of the novel instrument shall be described and the measured beam profiles compared to profiles obtained with SEM-grids and wirescanners.