IPAC2014 - List of Keywords (ground-motion)

Paper	Title	Other Keywords	Page
MOPRO070	Study on Ground Vibration Characteristics of Iranian Light Source Facility	site, synchrotron, operation, data-analysis	243
	A. Iraji, B. Kamkari, J. Rahighi, M. Rahimi, N. Ranjbar, F. Saeidi ILSF, Tehran, Iran
	In this study the results of ground vibration measurement for the site of Iranian Light Source Facility (ILSF) has been investigated. Light source buildings are very sensitive to the ground weak motions. Sources for the ground vibrations could be Cultural noise from human activities like traffic and industrial works. In order to satisfy requirements for level of the ground vibrations, a perfect ground vibration survey has been conducted and compared with other same projects. Two broad-band seismometers were utilized for surveying the ground vibration at ILSF site. The raw data were pre-processed as well as analyzed in term of seismology and engineering aspects. Spectrum amplitudes along with powers of the vibration amplitudes were calculated at the time domain. The power spectral density of vibration displacements were extracted from the measurements and were compared with results of other synchrotron projects. The results show that the dedicated site for ILSF is in the appropriate condition in the point view of ground vibration issues.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO070
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPRI088	Active Vibration Isolation System for CLIC Final Focus	controls, collider, linear-collider, luminosity	1775
	G. Balik, N. Allemandou, J. Allibe, J.P. Baud, L. Brunetti, G. Deleglise, A. Jeremie, S. Vilalte IN2P3-LAPP, Annecy-le-Vieux, France B. Caron, C. Hernandez SYMME, Annecy-le-Vieux, France
	With pinpoint accuracy, the next generation of Linear Collider such as CLIC will collide electron and positron beams at a centre of mass energy of 3 TeV with a desired peak luminosity of 2*1034 cm^-2s⁻¹. One of the many challenging features of CLIC is its ability to collide beams at the sub-nanometer scale at the Interaction Point (IP). Such a high level of accuracy could only be achieved by integrating Active Vibration Isolation system (AVI) upstream the collision to prevent the main source of vibration; Ground Motion (GM). Complementary control systems downstream the collision (Interaction Point FeedBack (IPFB), Orbit FeedBack(OFB)) allow low frequency vibration rejection. This paper focus on a dedicated AVI table designed for the last focusing quadrupole QD0 where the specifications are the most stringent. Combining FeedForward (FF) and FeedBack (FB) techniques, the prototype is able to reduce GM down to 0.6 nm RMS(4Hz) experimentally without load. These performances couldn’t be achieved without cutting edge-technology such as sub-nanometer piezo actuator, ultra-low noise accelerometer and seismometers and an accurate guidance system. The whole AVI system is described in detail.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRI088
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRO125	Synchronous Data Acquisition System for TPS and its Applications	data-acquisition, emittance, site, interface	3186
	C.H. Huang, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, S.H. Lee, C.Y. Liao, C.Y. Wu NSRRC, Hsinchu, Taiwan
	Orbit stability in 100 nm range is essential for a very small emittance synchrotron light source. However, all kinds of vibration source such as cultural noise and technical noise might deleterious the orbit stability. A synchronous data acquisition system is promising to study connection of orbit motion and various vibration related sources. In this report, we present a synchronous data acquisition system which integrates the measurement of beam position and vibration and then this system will deploy for the Taiwan Photon Source (TPS). To test the applicability of the system, systematic study orbit motion caused by vibration using this system was performed at Taiwan Light Source (TLS). Preliminary results will summary in this report.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO125
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THPRI005	The Mechanical and Vibration Studies of the Final Focus Magnet-cryostat for SuperKEKB	interaction-region, quadrupole, superconducting-magnet, vacuum	3770
	H. Yamaoka, Y. Arimoto, K. Kanazawa, M. Masuzawa, Y. Ohsawa, N. Ohuchi, K. Tsuchiya, Z.G. Zong KEK, Ibaraki, Japan
	Construction of the SuperKEKB has been progressed in KEK. The target luminosity of the SuperKEKB is 8×1035 cm^-2s⁻¹, which is 40 times larger than the KEKB. The vertical beam sizes of electron and positron must be squeezed to the level of 50 nano-meter at the interaction point. The beam final focus system for the SuperKEKB consists of 4-superconducting (SC) quadrupole doublets, 43 SC-correctors, 4 SC-compensation solenoids. The designs of the cryostats in the left and right side with respect to the beam interaction point are being studied with the progress of the magnet designs. In the design works, the support structure of each cryostat, strength of the cryostat components and support rods for supporting cold mass are investigated. As for the vibration issue, vibration properties of the superconducting quadrupole magnets due to the ground motion has been studied. Also vibration properties of the concrete bridges where the two cryostats will be placed in the interaction region were investigated and measured. We will present the cryostat designs and these vibration studies in this paper.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI005
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

MOPRO070

Study on Ground Vibration Characteristics of Iranian Light Source Facility

site, synchrotron, operation, data-analysis

243

A. Iraji, B. Kamkari, J. Rahighi, M. Rahimi, N. Ranjbar, F. Saeidi
ILSF, Tehran, Iran

In this study the results of ground vibration measurement for the site of Iranian Light Source Facility (ILSF) has been investigated. Light source buildings are very sensitive to the ground weak motions. Sources for the ground vibrations could be Cultural noise from human activities like traffic and industrial works. In order to satisfy requirements for level of the ground vibrations, a perfect ground vibration survey has been conducted and compared with other same projects. Two broad-band seismometers were utilized for surveying the ground vibration at ILSF site. The raw data were pre-processed as well as analyzed in term of seismology and engineering aspects. Spectrum amplitudes along with powers of the vibration amplitudes were calculated at the time domain. The power spectral density of vibration displacements were extracted from the measurements and were compared with results of other synchrotron projects. The results show that the dedicated site for ILSF is in the appropriate condition in the point view of ground vibration issues.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO070

Export •

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

TUPRI088

Active Vibration Isolation System for CLIC Final Focus

controls, collider, linear-collider, luminosity

1775

G. Balik, N. Allemandou, J. Allibe, J.P. Baud, L. Brunetti, G. Deleglise, A. Jeremie, S. Vilalte
IN2P3-LAPP, Annecy-le-Vieux, France
B. Caron, C. Hernandez
SYMME, Annecy-le-Vieux, France

With pinpoint accuracy, the next generation of Linear Collider such as CLIC will collide electron and positron beams at a centre of mass energy of 3 TeV with a desired peak luminosity of 2*1034 cm^-2s⁻¹. One of the many challenging features of CLIC is its ability to collide beams at the sub-nanometer scale at the Interaction Point (IP). Such a high level of accuracy could only be achieved by integrating Active Vibration Isolation system (AVI) upstream the collision to prevent the main source of vibration; Ground Motion (GM). Complementary control systems downstream the collision (Interaction Point FeedBack (IPFB), Orbit FeedBack(OFB)) allow low frequency vibration rejection. This paper focus on a dedicated AVI table designed for the last focusing quadrupole QD0 where the specifications are the most stringent. Combining FeedForward (FF) and FeedBack (FB) techniques, the prototype is able to reduce GM down to 0.6 nm RMS(4Hz) experimentally without load. These performances couldn’t be achieved without cutting edge-technology such as sub-nanometer piezo actuator, ultra-low noise accelerometer and seismometers and an accurate guidance system. The whole AVI system is described in detail.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRI088

Export •

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

THPRO125

Synchronous Data Acquisition System for TPS and its Applications

data-acquisition, emittance, site, interface

3186

C.H. Huang, Y.-S. Cheng, P.C. Chiu, K.T. Hsu, S.H. Lee, C.Y. Liao, C.Y. Wu
NSRRC, Hsinchu, Taiwan

Orbit stability in 100 nm range is essential for a very small emittance synchrotron light source. However, all kinds of vibration source such as cultural noise and technical noise might deleterious the orbit stability. A synchronous data acquisition system is promising to study connection of orbit motion and various vibration related sources. In this report, we present a synchronous data acquisition system which integrates the measurement of beam position and vibration and then this system will deploy for the Taiwan Photon Source (TPS). To test the applicability of the system, systematic study orbit motion caused by vibration using this system was performed at Taiwan Light Source (TLS). Preliminary results will summary in this report.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO125

Export •

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

THPRI005

The Mechanical and Vibration Studies of the Final Focus Magnet-cryostat for SuperKEKB

interaction-region, quadrupole, superconducting-magnet, vacuum

3770

H. Yamaoka, Y. Arimoto, K. Kanazawa, M. Masuzawa, Y. Ohsawa, N. Ohuchi, K. Tsuchiya, Z.G. Zong
KEK, Ibaraki, Japan

Construction of the SuperKEKB has been progressed in KEK. The target luminosity of the SuperKEKB is 8×1035 cm^-2s⁻¹, which is 40 times larger than the KEKB. The vertical beam sizes of electron and positron must be squeezed to the level of 50 nano-meter at the interaction point. The beam final focus system for the SuperKEKB consists of 4-superconducting (SC) quadrupole doublets, 43 SC-correctors, 4 SC-compensation solenoids. The designs of the cryostats in the left and right side with respect to the beam interaction point are being studied with the progress of the magnet designs. In the design works, the support structure of each cryostat, strength of the cryostat components and support rods for supporting cold mass are investigated. As for the vibration issue, vibration properties of the superconducting quadrupole magnets due to the ground motion has been studied. Also vibration properties of the concrete bridges where the two cryostats will be placed in the interaction region were investigated and measured. We will present the cryostat designs and these vibration studies in this paper.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI005

Export •

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