IPAC2016 - List of Keywords (LabView)

Paper	Title	Other Keywords	Page
MOPMB045	Development of FPGA-based Bunch-by-Bunch Beam Current Monitor	FPGA, storage-ring, feedback, injection	193
	Liu, C.S. Liu, Q. Luo, B.G. Sun, Z.R. Zhou USTC/NSRL, Hefei, Anhui, People's Republic of China
	Funding: Supported by the National Science Foundation of China 11575181, 11375178. And by the Fundamental Research Funds for the Central Universities WK2310000046, WK2310000056 Bunch-by-bunch (BxB) beam current measurement is an important method to study filling pattern of injection and beam instability threshold for multi-bunch operation storage ring, also, necessary equipment for top-up injection. A high-speed high-precision ADC and FPGA are used to construct the bunch-by-bunch beam current measurement system. FPGA reads data from ADC, and transfer the data to PC via USB. A LabVIEW program is running on PC to process the data, and communicates with other accelerator equipment with EPICS by CA Lab. Besides the bunch-by-bunch beam current measurement, the BxB longitudinal tune is measured by the system, and other potential bunch-by-bunch beam diagnostics study could be done in future, like bunch-by-bunch beam life etc., to improve the performance of the storage ring of Hefei light source.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB045
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MOPMB057	Automatic Microbeam Focusing for X-Ray Microbeam Experiments at the 4B Beamline of Pohang Light Source-II	focusing, controls, experiment, operation	220
	K.H. Gil, H. J. Choi, J.-H. Lim PAL, Pohang, Republic of Korea
	The 4B beamline of the Pohang Light Source-II performs X-ray microdiffraction and microfluorescence experiments using X-ray microbeams. When performing X-ray micro-experiments, an X-ray microbeam should first be prepared. Up to recently, the microbeams with vertical and horizontal sizes (full width at half maximum) of less than 3 μm have been achieved, by manually adjusting the translations and pitch angles of the vertically and horizontally focusing mirrors, in a Kirkpatrick'Baez (K-B) mirror system. In this research, we developed a program that automates the complex and cumbersome process of microbeam focusing, divided into half-cutting and focusing phases. The developed program was applied to the 4B beamline and enabled the focusing of an X-ray beam to a minimum size within one hour. This paper introduces the algorithms of the program and also examines its performance.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB057
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TUPOW029	Transverse Cavity Tuning at the Advanced Photon Source	cavity, linac, dipole, gun	1814
	G.J. Waldschmidt, L.H. Morrison, T.L. Smith ANL, Argonne, Ilinois, USA
	A 15-cell transverse deflecting cavity based on a SLAC design was fabricated at the Advanced Photon Source and is being prepared for installation into the Injector Test Stand. A beadpull method for tuning was selected in lieu of the nodal position method to minimize the possibility of contamination and surface damage to the irises. The process has been successfully documented for many accelerating mode structures, but there has been limited application to dipole mode structures. In this paper, we will discuss the methodology for tuning and conditioning a 2.8 GHz backward-traveling wave deflecting cavity.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW029
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WEPOY001	First Field Integral Measurement Campaign for Air Coil	undulator, controls, power-supply, operation	2991
	Z. Zhao, B. Du, Q.K. Jia USTC/NSRL, Hefei, Anhui, People's Republic of China S. Karabekyan, J. Pflüger, M. Yakopov XFEL. EU, Hamburg, Germany
	For the operation of the air coils, which are needed for the undulator segments of the European x-ray free-electron laser (E-XFEL), precise conversion constants are needed to properly convert excitation current to steering strength. This paper describes the measurement of all 200 air coils, needed for this purpose using the short moving wire (MW) system. A LabView program was developed to measure the distribution of first field integral of both vertical (B_y) and horizontal (B_z) magnetic field components in the median plane of an air coil automatically. The program is an adaptation of the existing program, which was used to characterize magnetic properties of the phase shifters (PS). Before doing the measurements the new program automatically finds the centers of B_y and B_z components, which are found to match with the geometrical centers with sufficient accuracy. After the measuring procedure is complete, the results are presented as graphics output and final tables. It shows that the measurement results can fully meet the design requirements of E-XFEL. For all measurements the excitation current of the coils was set to 1 Ampere.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY001
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THPOW027	Compact X-band Accelerator Controls for a Laser-Compton X-ray Source	controls, laser, interface, timing	3996
	D.J. Gibson, G.G. Anderson, C.P.J. Barty, R.A. Marsh LLNL, Livermore, California, USA
	Funding: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. LLNL's compact, tunable, laser-Compton x-ray source has been built around an advanced X-band photogun and accelerator sections and two independent laser systems. In support of this source, a complete integrated control system has been designed and built from scratch to provide access to the critical control points and continues to grow to simplify operation of the system and to meet new needs of this research capability. In addition to a PLC-based machine protection component, a custom, LabView-based suite of control software monitors systems including low level and high power RF, vacuum, magnets, and beam imaging cameras. This system includes a comprehensive operator interface, automated and expandable arc detection to optimize rf conditioning of the high-gradient structures, and automated quad-scan-based emittance measurements to explore the beam tuning parameter space. An overview of this system is presented, including the latest upgrades to FPGA-based hardware for the RF system controls.
DOI •	reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW027
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Paper

Title

Other Keywords

Page

MOPMB045

Development of FPGA-based Bunch-by-Bunch Beam Current Monitor

FPGA, storage-ring, feedback, injection

193

Liu, C.S. Liu, Q. Luo, B.G. Sun, Z.R. Zhou
USTC/NSRL, Hefei, Anhui, People's Republic of China

Funding: Supported by the National Science Foundation of China 11575181, 11375178. And by the Fundamental Research Funds for the Central Universities WK2310000046, WK2310000056
Bunch-by-bunch (BxB) beam current measurement is an important method to study filling pattern of injection and beam instability threshold for multi-bunch operation storage ring, also, necessary equipment for top-up injection. A high-speed high-precision ADC and FPGA are used to construct the bunch-by-bunch beam current measurement system. FPGA reads data from ADC, and transfer the data to PC via USB. A LabVIEW program is running on PC to process the data, and communicates with other accelerator equipment with EPICS by CA Lab. Besides the bunch-by-bunch beam current measurement, the BxB longitudinal tune is measured by the system, and other potential bunch-by-bunch beam diagnostics study could be done in future, like bunch-by-bunch beam life etc., to improve the performance of the storage ring of Hefei light source.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB045

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

MOPMB057

Automatic Microbeam Focusing for X-Ray Microbeam Experiments at the 4B Beamline of Pohang Light Source-II

focusing, controls, experiment, operation

220

K.H. Gil, H. J. Choi, J.-H. Lim
PAL, Pohang, Republic of Korea

The 4B beamline of the Pohang Light Source-II performs X-ray microdiffraction and microfluorescence experiments using X-ray microbeams. When performing X-ray micro-experiments, an X-ray microbeam should first be prepared. Up to recently, the microbeams with vertical and horizontal sizes (full width at half maximum) of less than 3 μm have been achieved, by manually adjusting the translations and pitch angles of the vertically and horizontally focusing mirrors, in a Kirkpatrick'Baez (K-B) mirror system. In this research, we developed a program that automates the complex and cumbersome process of microbeam focusing, divided into half-cutting and focusing phases. The developed program was applied to the 4B beamline and enabled the focusing of an X-ray beam to a minimum size within one hour. This paper introduces the algorithms of the program and also examines its performance.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-MOPMB057

Export •

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

TUPOW029

Transverse Cavity Tuning at the Advanced Photon Source

cavity, linac, dipole, gun

1814

G.J. Waldschmidt, L.H. Morrison, T.L. Smith
ANL, Argonne, Ilinois, USA

A 15-cell transverse deflecting cavity based on a SLAC design was fabricated at the Advanced Photon Source and is being prepared for installation into the Injector Test Stand. A beadpull method for tuning was selected in lieu of the nodal position method to minimize the possibility of contamination and surface damage to the irises. The process has been successfully documented for many accelerating mode structures, but there has been limited application to dipole mode structures. In this paper, we will discuss the methodology for tuning and conditioning a 2.8 GHz backward-traveling wave deflecting cavity.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPOW029

Export •

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

WEPOY001

First Field Integral Measurement Campaign for Air Coil

undulator, controls, power-supply, operation

2991

Z. Zhao, B. Du, Q.K. Jia
USTC/NSRL, Hefei, Anhui, People's Republic of China
S. Karabekyan, J. Pflüger, M. Yakopov
XFEL. EU, Hamburg, Germany

For the operation of the air coils, which are needed for the undulator segments of the European x-ray free-electron laser (E-XFEL), precise conversion constants are needed to properly convert excitation current to steering strength. This paper describes the measurement of all 200 air coils, needed for this purpose using the short moving wire (MW) system. A LabView program was developed to measure the distribution of first field integral of both vertical (B_y) and horizontal (B_z) magnetic field components in the median plane of an air coil automatically. The program is an adaptation of the existing program, which was used to characterize magnetic properties of the phase shifters (PS). Before doing the measurements the new program automatically finds the centers of B_y and B_z components, which are found to match with the geometrical centers with sufficient accuracy. After the measuring procedure is complete, the results are presented as graphics output and final tables. It shows that the measurement results can fully meet the design requirements of E-XFEL. For all measurements the excitation current of the coils was set to 1 Ampere.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOY001

Export •

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

THPOW027

Compact X-band Accelerator Controls for a Laser-Compton X-ray Source

controls, laser, interface, timing

3996

D.J. Gibson, G.G. Anderson, C.P.J. Barty, R.A. Marsh
LLNL, Livermore, California, USA

Funding: This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
LLNL's compact, tunable, laser-Compton x-ray source has been built around an advanced X-band photogun and accelerator sections and two independent laser systems. In support of this source, a complete integrated control system has been designed and built from scratch to provide access to the critical control points and continues to grow to simplify operation of the system and to meet new needs of this research capability. In addition to a PLC-based machine protection component, a custom, LabView-based suite of control software monitors systems including low level and high power RF, vacuum, magnets, and beam imaging cameras. This system includes a comprehensive operator interface, automated and expandable arc detection to optimize rf conditioning of the high-gradient structures, and automated quad-scan-based emittance measurements to explore the beam tuning parameter space. An overview of this system is presented, including the latest upgrades to FPGA-based hardware for the RF system controls.

DOI •

reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPOW027

Export •

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