Larp dipole mechanical analysis 121404 Acelerator Division LARP偶极力学分析121404加速器分裂

1、1superconducting magnet divisionjune 27, 2006j. schmalzlelarp collaboration meetingracetrack coil fabricationjesse schmalzle, bnl04/27/062superconducting magnet divisionjune 27, 2006j. schmalzlesr coil fabricationtwo short racetrack (sr) coils fabricated using lbl supplied tooling and coil parts:0.0

2、100.0200.0300.0400.0500.0600.0700.0024487296120 144 168 192 216time (hours)temperature (c)actualtarget actual = average of 3 thermocouples on the reaction fixture.639 c403.7 74.2 hrs 49.7 hrs47.6 hrs213 cmaximum sigma of 3 thermocouples during hold steps = 0.6 c3superconducting magnet divisionjune 2

3、7, 2006j. schmalzlesr coil fabricationcoils assembled into lbl supplied support structure:bladder pressurized to 4500 psi (31 mpa).average shell stress = 7500 psi (52 mpa).preparing for cold test, estimate end of may.4superconducting magnet divisionjune 27, 2006j. schmalzlelr coil designlong racetra

4、ck design closely matches that of short racetrack:double layer pancake made from single length of cable.transition between layers at lead end pole tip.iron pole coated with aluminum oxide.fiberglass sock cable insulation.pole width (uncoated) = 37.19 mm (1.464 in.)coil straight section length = 3.45

5、 m (136 in.)coil overall length = 3.61 m (142 in.)5superconducting magnet divisionjune 27, 2006j. schmalzlelr coil designvariations as dictated by increased length /experience with sr coils:segmented pole 5 segments allow for release of winding tension allow for differential expansion/contraction du

6、ring reaction. gaps at reaction start = .42 mm/m minimum.full length stainless steel rails (sr used horse shoe).aluminum oxide thickness increased to 0.25 mm (.010 in.) (sr used .13 mm (.005 in.). increased protection against shorts to pole.6superconducting magnet divisionjune 27, 2006j. schmalzlelr

7、 coil designvariations (continued):trace and glass cloth cover rails (covered coil only in sr). eliminate the need for precise cutting and placement that is required to cover the coil turns without covering the rails. glass cloth added between layers ease concern over greater potential for shorts be

8、tween layers.reaction stack up, cavity set by pusher (tooling):7superconducting magnet divisionjune 27, 2006j. schmalzlelr coil designvariations (continued):instrumentation trace to include quench protection heaters.increase argon flow during reaction. improve removal of contaminates that may contri

9、bute to shorts to the pole. use higher flow rate below 400 c as palmitic acid is vaporized.25 cfh up to 400 c, then drop to 10 cfh (sr was 3 cfh throughout).impregnation stack up, cavity set by pusher (tooling):8superconducting magnet divisionjune 27, 2006j. schmalzlelr coil designcoil assembly:g10

10、sheet and sst skin installed over impregnated coil.skins bolted to railskeys align individual pole segments.residual gaps in pole filled prior to impregnation.g10 shims between coil and rails sized based on cable & part measurements.ends contained by pushers attached to rails.9superconducting ma

11、gnet divisionjune 27, 2006j. schmalzlelr coil fabricationinsulated cable is transferred to winding spools:measured & divided onto 2 pancake spools. one installed on winding machine carriage, other mounted above coil pole for use on second layer. cable vacuumed and checked for debris using lump d

12、etector.cable tension automatically monitored & controlled.10superconducting magnet divisionjune 27, 2006j. schmalzlelr coil fabricationcoil winding:semi-automatic computer controlled winding machineexisting machine, new platform and shuttle.pneumatic clamps to hold coil while opposite side is w

13、ound.wind on reaction base plate.25 lbs cable tension.11superconducting magnet divisionjune 27, 2006j. schmalzlelr coil fabricationreaction:shim coil and close fixture to provide 1000 psi (7 mpa) side load.automatic computer controlled cycle.gas tight oven with continuously flowing argon atmosphere.

14、 supply fed directly into reaction fixture.12superconducting magnet divisionjune 27, 2006j. schmalzlelr coil fabricationepoxy impregnation:lead stabilizer solder fixture mounts to base plate.coil / impregnation fixture to hang vertically in vacuum tank.ctd 101k epoxy resin.automatic computer control

15、led cycle.3 strip heaters/side1500 watts ea.13superconducting magnet divisionjune 27, 2006j. schmalzlelr coil fabricationepoxy impregnation:fixture completely sealed.epoxy fed into bottom of fixture.outlet at top connected to resin trap.top of trap connected back to vacuum tank.14superconducting mag

16、net divisionjune 27, 2006j. schmalzlelr coil handlingfixture lifting:limit coil strain to less than .05% (1/4 of conductor strain limit)reaction & impregnation fixtures require only 2 point support.beams mount to sides of fixture in 2 places, lift from center.use for: transport up-righting flipp

17、ingmax strain .01%max deflection .003” (.08 mm) 15superconducting magnet divisionjune 27, 2006j. schmalzlelr coil handlingsupport fixture lifting: collars clamped around shell. same beams / spreader as reaction & impregnation fixture lifting. up-right and hang in prep stand for connection to tes

18、ting top hat. max strain .01%. max deflection .003” (.08mm).coil lifting: beam picks up coil using holes in rails. max strain .01 % max deflection .001” (.03 mm)16superconducting magnet divisionjune 27, 2006j. schmalzlelr coil handlingprep stand:hang impregnation tool for mounting to vacuum tank top

19、 plate.hang coil support structure for mounting to vertical cold test dewar top plate.17superconducting magnet divisionjune 27, 2006j. schmalzlelr assemblyinsertion of coils into support structure.existing long flat table.existing hydraulic cylinder coil insertion. bladder removal.18superconducting

20、magnet divisionjune 27, 2006j. schmalzlelr part / tooling statuscoil parts:drawings released, shop is fabricating, completion estimate 4/28/06.winding machine shuttle and clamps:drawings released, shop is fabricating, completion estimate 4/28/06.reaction tooling:drawings released, shop is ordering material.reaction oven:order placed with l&l, estimated delivery 7/7/06.impregnation tooling:drawings released, shop is estimating.fixture lifti