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Schottky-Enabled Photoemission and Dark Current Measurements-Toward an Alternate Approach to Fowler-Nordheim Plot Analysis
/ Wisniewski, E E (IIT, Chicago ; Argonne (main)) ; Gai, W (Argonne (main)) ; Power, J (Argonne (main)) ; Du, Y (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Hua, J (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Yan, L (Tsinghua U., Beijing, Dept. Eng. Phys.) ; You, Y (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Chen, H (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Huang, W (Tsinghua U., Beijing, Dept. Eng. Phys.) ; Tang, C (Tsinghua U., Beijing, Dept. Eng. Phys.) et al.
Field-emitted dark current, a major gradient-limiting factor in RF cavities, is usually analyzed via FowlerNordheim (FN) plots. Traditionally, field emission is attributed to geometrical perturbations on the bulk surface whosefield enhancement factor (beta) and the emitting area (A) can be extracted from the FN plot. [...]
2012 - 3 p.
- Published in : Conf. Proc.: C1205201 (2012) , pp. TUPPD069
External link: Published from JaCoW
In : 3rd International Particle Accelerator Conference, New Orleans, LA, USA, 20 - 25 May 2012, pp.1563-1565
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Reasearches of Thomson Scattering X-Ray Source at Tsinghua University
/ Huang, Wenhui ; Chen Huai Bi ; Cheng, C ; Cheng, Y ; Du, Q ; Du Tai Bin ; Du, Y C ; Ge, Y ; He, X Z ; Hua, J F et al.
The bright and tunable short pulse X-ray sources are being widely used in various research fields including materials, chemistry, biology and solid physics. Thomson scattering source is one of the most promising approaches to short pulsed X-ray sources. [...]
2004
External link: Published version from JACoW
In : 26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. THPOS35
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The Measurement of Tune and Phase Space at HLS
/ Yang Yong Li ; Hong Liu, Jian ; Hua Wang, Jun ; Liu, Zu-ping ; Sun Bao Gen ; Zheng, Kai
Tune and phase space online monitor at the electronic storage ring of Hefei Light Source (HLS) have been realized by using of turn-by-turn beam position data. In this paper, we have compared many methods to compute tune and discussed how to choose the best fitting method for our online tune computing [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3114
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Development and Application of Bunch-by-Bunch Measurement System of HLS
/ Liu, Jian H ; Hua Wang, Jun ; Pei, Y J ; Sun Bao Gen ; Yang Yong Li ; Zheng, Kai
This paper is intended to present the newly implemented wideband (100MHz) bunch oscillation measurement system, which is in nature a different method from the narrow-band (<5MHz) facilities employed before. Basic formalism and implementation details of the system is introduced to illustrate the function of observing coupled bunch instabilities in time and frequency domain. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.2932
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Bunch Tracing by Bunch by Bunch Measurement System in HLS
/ Zheng, Kai ; Hong Liu, Jian ; Hua Wang, Jun ; Li, Wei-min ; Liang Yang, Yong ; Liu, Zu-ping ; Sun Bao Gen
In this paper, we introduce a bunch tracing system which is based on a bunch-by-bunch (BxB) measurement system in Hefei Light Source (HLS), and present the analysis of the experiment results. Using an in-phase gate signal and a double balance mixer to control an external trigger of ADC, we test the reliability of the BxB system. [...]
2005
External link: Published version from JACoW
In : 21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.719
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