IPAC2017 - List of Authors (Choi, J.)

Paper	Title	Page
WEPAB120	Reproducibility Issues of NSLS-II Storage Ring and Modeling of the Lattice	2851
	J. Choi, W. Guo, T.V. Shaftan, X. Yang BNL, Upton, Long Island, New York, USA
	Funding: DOE Contract No: DE-SC0012704 As other facilities, in operating NSLS-II, we develop the lattices based on theoretical and simulation studies. Then the lattice is applied and the machine is optimized to have the desired design parameters. This process is very typical and works well and, furthermore, there is a general understanding that a model with the field measurement data is not realized as it is. However, it is evident that if the model represents the real machine close enough, there are lots of advantages we can take. One of them can be producing the lattice with changing environments. In this paper, we discuss the NSLS-II reproducibility status and efforts to construct the faithful realistic model.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB120
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WEPAB121	Database for NSLS-II Accelerator Operation	2854
	J. Choi, R.I. Farnsworth, T.V. Shaftan, G.J. Weiner, X. Yang BNL, Upton, Long Island, New York, USA
	Funding: DOE Contract No: DE-SC0012704 NSLS-II is employing a database and corresponding user interfaces which are used for the accelerator data sharing and management. The database include operation related information such as beam optics parameters, magnet measurement data, survey data and operation summary. To improve the usability, other functionalities are also being added. However, due to the limited scope, the general expectation of the overall facility cannot not be met and, in order to solve the issue, we are in the process of adopting Component Database (ComponentDB) developed at Advanced Photon Source (APS). This paper shows the current status of the process.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB121
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THPVA095	Storage Ring Injection Kickers Alignment Optimization in NSLS-II	4683
	G.M. Wang, W.X. Cheng, J. Choi, T.V. Shaftan, X. Yang BNL, Upton, Long Island, New York, USA
	The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. The SR is designed to work in top-off injection mode. The injection straight includes a septum and four fast kicker magnets with independent amplitude and timing control. Ideally, fast kickers formed a local bump, which is transparent to stored beam during top off injection. Due to mismatch of kicker voltage, timing or waveform, there is residual betatron oscillation and impact normal operation. This paper will present the injection kicker waveform measurement with beam, local and global alignment optimization to in improve top off injection transition.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA095
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

Reproducibility Issues of NSLS-II Storage Ring and Modeling of the Lattice

2851

J. Choi, W. Guo, T.V. Shaftan, X. Yang
BNL, Upton, Long Island, New York, USA

Funding: DOE Contract No: DE-SC0012704
As other facilities, in operating NSLS-II, we develop the lattices based on theoretical and simulation studies. Then the lattice is applied and the machine is optimized to have the desired design parameters. This process is very typical and works well and, furthermore, there is a general understanding that a model with the field measurement data is not realized as it is. However, it is evident that if the model represents the real machine close enough, there are lots of advantages we can take. One of them can be producing the lattice with changing environments. In this paper, we discuss the NSLS-II reproducibility status and efforts to construct the faithful realistic model.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB120

Export •

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

WEPAB121

Database for NSLS-II Accelerator Operation

2854

J. Choi, R.I. Farnsworth, T.V. Shaftan, G.J. Weiner, X. Yang
BNL, Upton, Long Island, New York, USA

Funding: DOE Contract No: DE-SC0012704
NSLS-II is employing a database and corresponding user interfaces which are used for the accelerator data sharing and management. The database include operation related information such as beam optics parameters, magnet measurement data, survey data and operation summary. To improve the usability, other functionalities are also being added. However, due to the limited scope, the general expectation of the overall facility cannot not be met and, in order to solve the issue, we are in the process of adopting Component Database (ComponentDB) developed at Advanced Photon Source (APS). This paper shows the current status of the process.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPAB121

Export •

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

THPVA095

Storage Ring Injection Kickers Alignment Optimization in NSLS-II

4683

G.M. Wang, W.X. Cheng, J. Choi, T.V. Shaftan, X. Yang
BNL, Upton, Long Island, New York, USA

The National Synchrotron Light Source II (NSLS-II) is a state of the art 3 GeV third generation light source at Brookhaven National Laboratory. The SR is designed to work in top-off injection mode. The injection straight includes a septum and four fast kicker magnets with independent amplitude and timing control. Ideally, fast kickers formed a local bump, which is transparent to stored beam during top off injection. Due to mismatch of kicker voltage, timing or waveform, there is residual betatron oscillation and impact normal operation. This paper will present the injection kicker waveform measurement with beam, local and global alignment optimization to in improve top off injection transition.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-THPVA095

Export •

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