MEDSI2018 - List of Keywords (ground-motion)

Paper	Title	Other Keywords	Page
TUPH28	Calculation of Orbit Distortions for the APS Upgrade Due to Girder Resonances	factory, resonance, dipole, quadrupole	95
	J. Nudell, Z. Liu, C.A. Preissner, V. Sajaev ANL, Argonne, Illinois, USA
	Maintaining sub-micron-scale beam stability for the APS-U Multibend Achromat Lattice places strict requirements on the magnet support system. Historically, magnet vibration requirements have been based on physics simulations which make broad generalizations and assumptions regarding the magnet motion. Magnet support systems have been notoriously difficult to analyze with FEA techniques and as a consequence, these analyses have been underutilized in predicting accelerator performance. The APS has developed a procedure for accurate modeling of magnet support systems. The girder mode shapes are extracted from these analyses and exported to accelerator simulation code elegant to calculate the static beam amplification factor for each mode shape. These amplification factors, along with knowledge of damping coefficients and the character of the tunnel floor motion, may then be used to predict the effect of girder resonances on beam stability and validate the magnet support designs.
	Poster TUPH28 [0.848 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH28
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TUPH41	Investigation of Regulation Plan for the Vibration Utility Equipment of HEPS	booster, ion-source, damping, site	136
	F. Yan, D. Ji, Y. Jiao, C. H. Li, Z.Z. Wang, G. Xu IHEP, Beijing, People's Republic of China Z. Jiang, L.W. Lai, Q.L. Sun SINAP, Shanghai, People's Republic of China
	For the third or fourth generation synchrotron light sources, the brilliance of the x-ray beam is 2 to 3 order higher than other generations, and in the meanwhile the beam emittance is at least one order smaller. To ensure the stability of the beam, the vibration caused beam motion is usually controlled to be within 10% of the RMS beam size. Thus the smaller beam emittance is, more restrict of the regulation plan to the vibration sources should be. Inside of the light source site, one major vibration source is the utility equipment such as water pump, compressors and so on. There are two controlling approaches for the vibration amplitude of those sources, one is damping, and another way is decay. However reasonable specification is the key of the controlling method. This work will present the detailed establish process of the regulation plan for HEPS in China.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH41
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

WEPH34	Research on Active Vibration Isolation System	ISOL, controls, quadrupole, damping	280
	J.B. Yu, L. Kang IHEP, Beijing, People's Republic of China J.X. Chen, H.Y. He, L. Liu, X.J. Nie, C.J. Ning, A.X. Wang, G.Y. Wang, Y.J. Yu, J.S. Zhang, D.H. Zhu CSNS, Guangdong Province, People's Republic of China
	Funding: work supported by Natural Science Foundation of China(11375217) Based on the increase of accuracy requirements coming from increasing instrument precision, advanced isolation components are required, and active vibration control method is proposed. This paper mainly shows the experimental system, and some work has been done at present. Now that we are still at the beginning research of active vibration isolation, we hope it will be steadily used in the support systems of some precision equipment and instruments.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH34
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUPH28

Calculation of Orbit Distortions for the APS Upgrade Due to Girder Resonances

factory, resonance, dipole, quadrupole

95

J. Nudell, Z. Liu, C.A. Preissner, V. Sajaev
ANL, Argonne, Illinois, USA

Maintaining sub-micron-scale beam stability for the APS-U Multibend Achromat Lattice places strict requirements on the magnet support system. Historically, magnet vibration requirements have been based on physics simulations which make broad generalizations and assumptions regarding the magnet motion. Magnet support systems have been notoriously difficult to analyze with FEA techniques and as a consequence, these analyses have been underutilized in predicting accelerator performance. The APS has developed a procedure for accurate modeling of magnet support systems. The girder mode shapes are extracted from these analyses and exported to accelerator simulation code elegant to calculate the static beam amplification factor for each mode shape. These amplification factors, along with knowledge of damping coefficients and the character of the tunnel floor motion, may then be used to predict the effect of girder resonances on beam stability and validate the magnet support designs.

Poster TUPH28 [0.848 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH28

Export •

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

TUPH41

Investigation of Regulation Plan for the Vibration Utility Equipment of HEPS

booster, ion-source, damping, site

136

F. Yan, D. Ji, Y. Jiao, C. H. Li, Z.Z. Wang, G. Xu
IHEP, Beijing, People's Republic of China
Z. Jiang, L.W. Lai, Q.L. Sun
SINAP, Shanghai, People's Republic of China

For the third or fourth generation synchrotron light sources, the brilliance of the x-ray beam is 2 to 3 order higher than other generations, and in the meanwhile the beam emittance is at least one order smaller. To ensure the stability of the beam, the vibration caused beam motion is usually controlled to be within 10% of the RMS beam size. Thus the smaller beam emittance is, more restrict of the regulation plan to the vibration sources should be. Inside of the light source site, one major vibration source is the utility equipment such as water pump, compressors and so on. There are two controlling approaches for the vibration amplitude of those sources, one is damping, and another way is decay. However reasonable specification is the key of the controlling method. This work will present the detailed establish process of the regulation plan for HEPS in China.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-TUPH41

Export •

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

WEPH34

Research on Active Vibration Isolation System

ISOL, controls, quadrupole, damping

280

J.B. Yu, L. Kang
IHEP, Beijing, People's Republic of China
J.X. Chen, H.Y. He, L. Liu, X.J. Nie, C.J. Ning, A.X. Wang, G.Y. Wang, Y.J. Yu, J.S. Zhang, D.H. Zhu
CSNS, Guangdong Province, People's Republic of China

Funding: work supported by Natural Science Foundation of China(11375217)
Based on the increase of accuracy requirements coming from increasing instrument precision, advanced isolation components are required, and active vibration control method is proposed. This paper mainly shows the experimental system, and some work has been done at present. Now that we are still at the beginning research of active vibration isolation, we hope it will be steadily used in the support systems of some precision equipment and instruments.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-MEDSI2018-WEPH34

Export •

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