修车大队一品楼qm论坛51一品茶楼论坛,栖凤楼品茶全国楼凤app软件 ,栖凤阁全国论坛入口,广州百花丛bhc论坛杭州百花坊妃子阁

oe1(光电查) - 科学论文

3 条数据
?? 中文（中国） ▾

  • Fast global orbit feedback system in PLS-II

    摘要： The transverse position of the electron beam in the Pohang Light Source-II is stabilized by the global orbit feedback system. A slow orbit feedback system has been operating at 2 Hz, and a fast orbit feedback (FOFB) system at 813 Hz was installed recently. This FOFB system consists of 96 electron-beam-position monitors, 48 horizontal fast correctors, 48 vertical fast correctors and Versa Module Europa bus control system. We present the design and implementation of the FOFB system and its test result. Simulation analysis is presented and future improvements are suggested.

    关键词： Instrumentation for particle accelerators and storage rings - high energy (linear accelerators, synchrotrons),Instrumentation for synchrotron radiation accelerators,Accelerator Subsystems and Technologies

    更新于2025-09-23 15:22:29

  • Anisotropic nano-scale resolution in 3D Bragg coherent diffraction imaging

    摘要： We demonstrate that the resolution of three-dimensional (3D) real-space images obtained from Bragg coherent x-ray diffraction measurements is direction dependent. We propose and demonstrate the effectiveness of a metric to determine the spatial resolution of images that accounts for the directional dependence. The measured direction dependent resolution of (cid:2)4–9 nm is higher than the best previously obtained 3D measurements. Finally, we quantify the relationship between the resolution of recovered real-space images and dosage and discuss its implications in the light of next generation synchrotrons.

    关键词： synchrotrons,resolution,Bragg coherent x-ray diffraction imaging,dosage,direction dependent

    更新于2025-09-23 15:21:21

  • Non-destructive position measurement of coasting beam using Schottky signals

    摘要： The beam position appears in the transverse Schottky signal spectra of coasting beams at revolution frequency and its harmonics. In this contribution, we utilize this signal for beam position monitoring using regular shoe-box monitors at heavy ion synchrotron GSI SIS-18. Position resolution below 1 mm at 1 kHz rate for 10 mA current was obtained. These results demonstrate the feasibility of non-destructive position monitoring of unbunched beams in synchrotrons and storage rings using capacitive pick-up data with appropriate signal processing.

    关键词： synchrotrons,beam position monitoring,coasting beams,storage rings,Schottky signals

    更新于2025-09-10 09:29:36