High Bay Rf Room; Miscellaneous Plumbing, Rf Windows And Rf Doors - GE SIGNA Voyager Pre-Installation

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Illustration 7-9: Example Of Wall Construction For Airborne Noise Control - Option 2

4.2.2.2 High Bay RF Room

A high bay RF Room is a self contained RF Room which has open air space between the RF

Room ceiling and the building floor above. The air space is an acoustic transmission path.

Acoustic energy must be reduced to minimize this transmission of energy through this path.

In cases where the Magnet is to be installed in a high bay, it may be most effective to enclose

the RF Room with its own drywall and steel stud room. The key difference being a ceiling

assembly that mimics the sidewall construction to contain noise.

•

Normal high STC stud walls from above would be used to support a ceiling assembly

constructed of structural C channel with two layers of drywall on each side (total of 4 layers)

with fiberglass batt in the cavity.

•

Penetrations should be avoided via the use of surface mounted lights. HVAC and ducts

passing through the ceiling, party wall or side walls would require acoustic noise attenuation

in the form of inline silencers. Gaps and cracks would be sealed between the ceiling, party

wall or vertical side walls and the cryogen vent plumbing. In essence the Magnet would be

enclosed in a drywall "doghouse".

Other construction details are equally important to mitigate noise transmission to meet the

intended goal.

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Pipes (gas or water) and electrical conduit or Magnet Room signal cables must be sealed

where they penetrate the walls or ceiling. A heavy mastic material such as Duxseal™ is

appropriate.

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SIGNA Voyager Pre-Installation

Direction 5680008–1EN, Revision 2

4 Acoustic Background and Design Guidelines

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