1 Collaboration Meeting 33 - Glasgow 26 th June 2012 Design Layout Andrew Moss for Alan Grant, STFC.

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Presentation transcript:

1 Collaboration Meeting 33 - Glasgow 26 th June 2012 Design Layout Andrew Moss for Alan Grant, STFC

Overview Review Panel Recommendations Coax Distribution Coax Installation Coax supports Magnetic Field – 4616 pre amp Next Steps Summary 2

Recommendation from Review Panel RF Distribution Coax high power phase shifters not warranted. Relocate Hybrid splitters from behind shield wall. Provides more space for access to amplifiers. Reduces the length and volume of 4” coax. Were possible reduce number of coaxial joints. Mechanical Installation & Maintenance Try and install all under floor coax distribution at stage V. Design improved mounting mechanism to minimise protrusions. Improve lateral movement capability for any miss-alignment of coax distribution during installation. 3

RF Layout – view from cooling channel side 4 high power phase shifters removed. no 4 inch coax over wall. hybrid splitters moved - more accessible manually adjustable line trimmers to take up errors in coax length easier to assemble – introduced flexible coax.

RF Layout – view behind shield wall 5 hybrid splitters moved – space freed up behind wall. no coax distribution going under the wall. 6 off 6 inch coax over the top of wall. Coax length matching now takes place other side of wall – space less of a constraint. improved access for installing amplifiers.

RF Layout – view behind shield wall 6

Fixed Phase Operation Schematic Mechanical Line Trimmers for assembly uncertainties. 7 Mechanical Line Trimmers Installed in 3 of the lines to each cavity pair. Primarily to take up the assembly uncertainty. 82mm of travel, implies +/- 10 degs of trimming might be available.

Line Trimmer Arrangement to South Side RF Couplers 8 Beam Direction Mechanical Line Trimmers 82mm travel = 20deg Direction Coupler - 1 to each Coupler 4” Flexible coax for any mis-alignment

Line Trimmer Arrangement to North Side RF Couplers 9 Beam Direction Mechanical Line Trimmers 82mm travel = 20deg 4” Flexible coax for any mis-alignment Direction Coupler - 1 to each Coupler

Clear Access for removal of AFC 10 AFC’s can be removed without having to dismantle any of the RF coax system

Coax Sections – Installation/Removal Concerns 11 ~55mm required to clear mating flangeFlexible coax system in each line. Have adjustment in clamp system. Phase shifters to be installed last in assembly sequence

Coax Supports 12 Rotation Vertical Longitudinal Horizontal CLAMP TEE SLOT RAILS

Pre Amp Tube Position Behind Shield Wall Pre amp tube below level of shield wall ~ 0.16m and spaced ~ 0.53m back. Initial magnet field analysis predict approx 8-10 gauss. Wall Tube 4616 Pre Amp

Next Steps – Design for Fixed Phase Angle of 124 degrees 14

RF Procurement Don Summers has been supplied with RF component procurement list which he is working on. These include:- Line trimmers (mechanical adjustment) Dummy Loads Hybrid Splitters Reducers Directional Couplers Circulators Elbows 15

Summary Addressed all of the issues raised by the review panel. Changed the design as per their recommendations. There are no clashes with the steel work on both the cooling channel false floor and the parked position false floor – lighting trunking clash on South mezzanine floor which is being resolved. Some concrete on south side needs to be removed. Installation made simpler with introduction of flexible coax and relocation of hybrid splitters. No clash issues with moving AFC’s to parked position on false floor. Magnetic field calcs indicate no issues for 4616 pre amp. Fire officer has been consulted and agreed that what is proposed causes no access problems or issues. 16