IPAC2018 - List of Authors (Huang, X.)

Paper	Title	Page
THPAK153	Linac Optics Correction With Trajectory Scan Data	3606
	X. Huang, Y.-C. Chao, T.J. Maxwell SLAC, Menlo Park, California, USA T. Zhang USTC/NSRL, Hefei, Anhui, People's Republic of China
	We proposed and tested a scheme to measure and correct linac optics by scanning the beam trajectory in the horizontal and vertical phase spaces. The trajectory data are compared to tracking data in a fitting scheme, from which we can derive the quadrupole strength errors. Simulation is carried out to evaluate the requirements and the performance of the method. The method is experimentally applied to FEL linacs.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK153
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THPML116	AutoTuner: A General Graphical User Interface for Automated Tuning	4939
	X. Huang SLAC, Menlo Park, California, USA T. Zhang USTC/NSRL, Hefei, Anhui, People's Republic of China
	AutoTuner is a general graphical user interface (GUI) that we developed for automated tuning or online optimization. The GUI provides a convenient interface to select tuning knobs, objectives, and optimization algorithms and to change the tuning control parameters. Tuning setup can be created and saved for reuse. The progress of the tuning processing is plotted in real time. The tuning process can be paused, aborted, or resumed. We have tested the program for real-life accelerator tuning problems.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML116
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THPML117	Study of the Impact of Linear Coupling on Off-Axis Injection	4943
	X. Huang SLAC, Menlo Park, California, USA T. Zhang USTC/NSRL, Hefei, Anhui, People's Republic of China
	The next generation of storage ring light sources will likely operate with high linear coupling, which could potentially prevent the use of off-axis injection as large horizontal oscillation of the injected beam is coupled to the vertical plane. We did experiments on the SPEAR3 storage ring to study how linear coupling impact the dynamic aperture and the off-axis injection efficiency. The results show that the dynamic aperture is significantly reduced and injection efficiency can drop to zero when operated on the coupling resonance. However, with large nonlinear detuning, the dynamic aperture and high injection efficiency can survive with the stored beam at full coupling because the injected beam is shifted away from the coupling resonance.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML117
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Paper

Title

Page

Linac Optics Correction With Trajectory Scan Data

3606

X. Huang, Y.-C. Chao, T.J. Maxwell
SLAC, Menlo Park, California, USA
T. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China

We proposed and tested a scheme to measure and correct linac optics by scanning the beam trajectory in the horizontal and vertical phase spaces. The trajectory data are compared to tracking data in a fitting scheme, from which we can derive the quadrupole strength errors. Simulation is carried out to evaluate the requirements and the performance of the method. The method is experimentally applied to FEL linacs.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPAK153

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPML116

AutoTuner: A General Graphical User Interface for Automated Tuning

4939

X. Huang
SLAC, Menlo Park, California, USA
T. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China

AutoTuner is a general graphical user interface (GUI) that we developed for automated tuning or online optimization. The GUI provides a convenient interface to select tuning knobs, objectives, and optimization algorithms and to change the tuning control parameters. Tuning setup can be created and saved for reuse. The progress of the tuning processing is plotted in real time. The tuning process can be paused, aborted, or resumed. We have tested the program for real-life accelerator tuning problems.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML116

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reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPML117

Study of the Impact of Linear Coupling on Off-Axis Injection

4943

X. Huang
SLAC, Menlo Park, California, USA
T. Zhang
USTC/NSRL, Hefei, Anhui, People's Republic of China

The next generation of storage ring light sources will likely operate with high linear coupling, which could potentially prevent the use of off-axis injection as large horizontal oscillation of the injected beam is coupled to the vertical plane. We did experiments on the SPEAR3 storage ring to study how linear coupling impact the dynamic aperture and the off-axis injection efficiency. The results show that the dynamic aperture is significantly reduced and injection efficiency can drop to zero when operated on the coupling resonance. However, with large nonlinear detuning, the dynamic aperture and high injection efficiency can survive with the stored beam at full coupling because the injected beam is shifted away from the coupling resonance.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2018-THPML117

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)