Preliminary vibration analysis of magnet/support system for 7-GeV APS storage ring

Technical Report · Mon May 08 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/10138768· OSTI ID:10138768

Wambsganss, M W

The storage ring quadrupoles, sextupoles, and correction magnets will be mounted on a common girder approximately 4.0 m long. The rigid girder, in turn, is mounted on three five-ton jacks, each of which is mounted on a pedestal that is grouted and bolted to the floor. For this preliminary analysis, we will assume that the girder has a weight per unit length of 100 lb/ft and a bending stiffness that is significantly greater than the vertical stiffness provided by the pedestal (jack-screw) supports. This allows us to approximate the magnet/support system as a rigid beam (girder) on spring supports (jack-screws) carrying distributed masses (magnets). These approximations permit us to study the rigid body translational and rotational (rocking) modes of the system. It should be noted that the preliminary design has two jack-screw supports at the left end and one at the right end. It should be noted that the magnet/support system studied is only a conceptual design. In actuality, there are five different magnet/support configurations comprising each of the 40 sectors of the storage ring. Also, it is expected that the details of the final design, in particular with respect to the positioning of the pedestal supports, will somewhat different. It should further be noted that a major assumption in the analysis is that the stiffness of the support beam with respect to the stiffness of the jack-screw supports is such that the support girder can be assumed rigid. To evaluate this assumption it is planned to perform a finite element analysis of the magnet/support system in which the flexibility of the support girder is included in the dynamic analysis.

• Research Organization: Argonne National Lab., IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 10138768
• Report Number(s): ANL/APS/IN/VIB--89/2; ON: DE92012379
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303
DESIGN
EXPERIMENTAL FACILITIES AND EQUIPMENT
GROUND MOTION
MAGNETS
MECHANICAL STRUCTURES
MECHANICAL VIBRATIONS
QUADRUPOLES
STORAGE RINGS
SUPPORTS
SYNCHROTRON RADIATION SOURCES