Abstract—

The scanning two-dimensional ionization profile monitor (IPM) has been upgraded for the beam diagnostics in beam transport lines. The main parts of the monitor are an extractor, a scanner, and two analyzers with a slit at which residual-gas ionization products collected from a beam path as long as 50 mm arrive. The current amplifier based on microchannel plates and a current collector are placed in sequence behind the slit in order to increase the IPM sensitivity under high-vacuum conditions (n × 10⁻⁶ Pa). Two-dimensional beam profiles are obtained by scanning. A special electronic unit containing high-voltage supplies and collector-current meters has been created for the scanning and IPM control. Three upgraded IPMs have been placed between the accelerator and the physical facilities in each beamline of the DC-280 FLNR JINR cyclotron. Data processing and simultaneous display of experimental results from several IPMs are carried out by a program developed in the LabVIEW design environment. The minimum current of the ⁴⁰Ar ion beam with the energy of 5 MeV/nucleon at which the monitor is still operable is estimated to be several tens of picoamperes. The reliability of the upgraded IPM has been demonstrated by its operation.

中文翻译：

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升级束传输线中的扫描二维电离轮廓仪

摘要-

扫描二维电离轮廓监视器（IPM）已升级，可用于束传输线中的束诊断。监测仪的主要部件是提取器，扫描仪和两个带有狭缝的分析仪，从光路中收集的残留气体电离产物（长至50 mm）到达狭缝处。将基于微通道板的电流放大器和集电器依次置于狭缝的后面，以提高高真空条件下（n ×10 ^-6的IPM灵敏度）Pa）。通过扫描获得二维光束轮廓。已经创建了一个包含高压电源和集电极电流表的特殊电子单元，用于扫描和IPM控制。在DC-280 FLNR JINR回旋加速器的每条光束线的加速器和物理设施之间放置了三个升级的IPM。数个IPM的数据处理和实验结果的同时显示是通过LabVIEW设计环境中开发的程序进行的。监测仪仍可工作的能量为5 MeV /核子的⁴⁰ Ar离子束的最小电流估计为几十皮安。升级后的IPM的可靠性已通过其操作得到证明。