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1,050 results on '"Man Zhou"'

103. Study of electrostatic septum design and its high-voltage discharge protection

Author

He, Zi-Feng, Ouyang, Lian-Hua, Zhang, Man-Zhou, Li, De-Ming, Chen, Zhi-Ling, Wu, Xiao-Bing, and Pu, Yue-Hu

Subjects
Physics - Accelerator Physics
Abstract

In this paper, we introduce the design of electrostatic septum (ESS) for the accelerator of Shanghai Advanced Proton Therapy (SAPT), and discuss its mechanical structure and the material selection of the electrode. The beam loss on the septum is studied, and the calculation results are given by the particle simulation and by the formula which is related to the placement angle and the divergence angle in the horizontal direction. Considering the thermal effect of the beam loss on the head of the septum, the equilibrium temperature at work is calculated. In addition, the distribution of the electric field and the trajectory of the particles are also simulated. The phenomenon of vacuum discharge in the working ESS is analyzed in detail on the relationship between the working current and the enhancement factor of the electric field on the electrode surface. Based on the discharge mechanism, the importance of degassing and cleaning of ESS is analyzed. We also analyzed the effect of external series resistance from circuit and discharge mechanism. It is considered that series resistance within a certain range can increase the breakdown voltage between vacuum electrodes and reduce the irreversible damage to the surface of the electrode system caused by the discharge process. The formula for the value of the resistance is given., Comment: 17 pages, 10 figures

Published
2019

136. Deep Fourier Up-Sampling.

Author

Man Zhou, Hu Yu, Jie Huang 0017, Feng Zhao 0004, Jinwei Gu, Chen Change Loy, Deyu Meng, and Chongyi Li

Published
2022

141. Beam based calibration of X-ray pinhole camera in SSRF

Author

Leng, Yong-Bin, Huang, Guo-Qing, Zhang, Man-Zhou, Chen, Zhi-Chu, Chen, Jie, and Ye, Kai-Rong

Subjects
Nuclear Experiment, Physics - Accelerator Physics
Abstract

The Shanghai Synchrotron Radiation Facility (SSRF) contains a 3.5-GeV storage ring serving as a national X-ray synchrotron radiation user facility characterized by a low emittance and a low coupling. The stability and quality of the electron beams are monitored continuously by an array of diagnostics. In particular, an X-ray pinhole camera is employed in the diagnostics beamline of the ring to characterize the position, size, and emittance of the beam. The performance of the measurement of the transverse electron beam size is given by the width of the point spread function (PSF) of the X-ray pinhole camera. Typically the point spread function of the X-ray pinhole camera is calculated via analytical or numerical method. In this paper we will introduce a new beam based calibration method to derive the width of the PSF online.

Published
2011
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142. Formal Schema Theory and Teaching EFL Reading

Author

Young, Barbara N and Man, Zhou

Abstract

Inquirers designed and conducted a study investigating whether or not results derived from previous research focusing on teaching and learning English as a native or foreign language would be replicated in a learning environment in which English is taught as a foreign language as in China. Because activation of formal schemata plays an important role in the reading activity of language learning, inquirers are also investigating if activating formal schemata stored in students' minds will facilitate students' reading comprehension.

Published
2005

145. Wufengshan Expressway: a review of systems on China’s first intelligent highway

Author

Zimu Tang, Xing Peng, Xiaolong Su, Man Zhou, and Lin An

Subjects
Civil and Structural Engineering
Abstract

Wufengshan Expressway, which opened in June 2021, is China’s first intelligent highway. Its smart systems include 5G communications (the fifth-generation technology standard for broadband cellular networks), wireless chargers, artificial intelligence, the ‘internet of things’ and the ‘internet of vehicles’. The use of these technologies has improved operational efficiency, safety and management. It has also helped to reduce greenhouse gas emissions and protect the environment. This paper introduces the various systems installed on the new road and will serve as a reference for future intelligent highways.

Published
2023

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