Active stabilization of mechanical quadrupole vibrations for linear colliders

Montag, C.

doi:10.1016/0168-9002(96)00451-2

Cited by 15 publications

(13 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, their relatively low dynamic stiffness can engender an insufficient compatibility with other tasks, like a micro-positioning stage, and may still be insufficiently robust to external disturbances. In stiff strategies, the isolation is only provided by the feedback operation [66][67][68]. The high stiffness provides a high robustness to external disturbances, but also a strong coupling.…”

Section: Fields Of Applicationsmentioning

confidence: 99%

Review of Active Vibration Isolation Strategies

Collette¹,

Janssens²,

Artoos³

2011

MENG

View full text Add to dashboard Cite

This paper reviews recent patented developments in active vibration isolation. First of all, the fundamental limitations of passive vibration isolations are established, to understand the motivations to introduce active control in vibration isolation. Then, the main different active strategies are presented using simple systems and compared. Finally, several specific issues are listed and briefly discussed.

show abstract

Section: Fields Of Applicationsmentioning

confidence: 99%

Review of Active Vibration Isolation Strategies

Collette¹,

Janssens²,

Artoos³

2011

MENG

View full text Add to dashboard Cite

show abstract

“…They are related to the extended shape of the structure, the limited stability of the floor on which they are mounted, and limitations on the technology of the sensors and actuators which could couple with the electromagnets. During the last twenty years, many studies have been conducted in order to comply with these requirements, both for the active stabilisation of the main beam quadrupoles [6][7][8], and for the stabilisation of final focus quadrupoles [9][10][11][12][13][14][15]. A critical review of strategies can be found in [16].…”

Section: Introductionmentioning

confidence: 99%

Coil-free active stabilisation of extended payloads with optical inertial sensors

Watchi

Ding

Tshilumba

et al. 2018

Meas. Sci. Technol.

View full text Add to dashboard Cite

Abstract. This paper presents a new active isolation strategy and system which is dedicated to extended payloads, and compatible with particle accelerator environment. In comparison to the current isolation systems used in this environment, the system proposed does not contains any coil or elastomer and the supporting frame is dedicated to isolate long payloads from seismic motion. The concept proposed has been tested numerically on 3 and 6 degrees of freedom models, and validated experimentally on a one degree of freedom scaled test set-up. An attenuation of 40 dB at 1 Hz has been reached with the stage built. The complete description of performance and a noise budgeting are included in this paper.

show abstract

“…For a single-pass machine this is the machine repetition rate, which corresponds to 5 Hz for the International Linear Collider (ILC) [4] and 50 Hz for the Compact Linear Collider (CLIC) [5]. Other techniques include faster intra-bunch train feedbacks [6] as well as stabilization of the quadrupole magnets themselves, both active [7][8][9] and passive [10].…”

Section: Introductionmentioning

confidence: 99%

Compensation of orbit distortion due to quadrupole motion using feed-forward control at KEK ATF

Bett

Charrondiere

Patecki

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

View full text Add to dashboard Cite

A B S T R A C TThe high luminosity requirement for a future linear collider sets a demanding limit on the beam quality at the Interaction Point (IP). One potential source of luminosity loss is the motion of the ground itself. The resulting misalignments of the quadrupole magnets cause distortions to the beam orbit and hence an increase in the beam emittance. This paper describes a technique for compensating this orbit distortion by using seismometers to monitor the misalignment of the quadrupole magnets in real-time.The first demonstration of the technique was achieved at the Accelerator Test Facility (ATF) at KEK in Japan. The feed-forward system consisted of a seismometer-based quadrupole motion monitoring system, an FPGAbased feed-forward processor and a stripline kicker plus associated electronics. Through the application of a kick calculated from the position of a single quadruple, the system was able to remove about 80% of the component of the beam jitter that was correlated to the motion of the quadrupole. As a significant fraction of the orbit jitter in the ATF final focus is due to sources other than quadrupole misalignment, this amounted to an approximately 15% reduction in the absolute beam jitter.

show abstract

Active stabilization of mechanical quadrupole vibrations for linear colliders

Cited by 15 publications

References 4 publications

Review of Active Vibration Isolation Strategies

Review of Active Vibration Isolation Strategies

Coil-free active stabilisation of extended payloads with optical inertial sensors

Compensation of orbit distortion due to quadrupole motion using feed-forward control at KEK ATF

Contact Info

Product

Resources

About