LARP Phase II Secondary Collimator RC 1 Collimator
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LARP Phase II Secondary Collimator RC 1 Collimator Test Program LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
LARP Phase II Secondary Collimator RC 1 Collimator Test Plan • Near term – Jaw/Cooling Tube Joint Development – Single Jaw Thermal Tests • Later this year…… – Design and fab hardware for Mechanical Prototype Tests LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
Jaw/Cooling Tube Joint Development Purpose: determine appropriate joint configuration & fabrication methods In process. . target completion date May 9 th Cooling Tube • Square hollow magnet conductor first test ~ 9 mm x 9 mm Jaw Center Mandrel • Copper jaw and mandrel • Cu-Au braze • After first braze, machine coil o. d. for correct fit to jaw i. d. ~70 mm dia ~100 mm dia • After second braze, section assy to inspect coverage • Round tubing with grooved (? ) mandrel is next ~100 mm LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
Development/Test Lab LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9 Item availability Chiller existing Vacuum equip’t SLAC misc? Heater controller select/buy Gantry select/buy Tools, table select/buy Instrumentation select/buy Power/water to be installed
Single Jaw Thermal Test Purpose: measure cooling effectiveness and thermal deformations Current focus: purchase long lead items concurrently with FEA predictions and mechanical design of required test hardware. Next Milestones: Copper Jaw… target is mid June Experiment hardware & test set-up…target early is July • Internal helical cooling tube • Collimator midpoint stop and flexible end supports • Commercial electric resistance heaters, coupled with thermal grease – SS power ~10 k. W, evenly distributed – No transient testing – FE model test => validation of simulations • No Jaw rotation • Perform test under inert gas, insulated in air, or under vacuum…TBD LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
Single Jaw Thermal Test setup Thermocouples measure temperature distribution Reference bar, water cooled to maintain straightness (radiation shield ? ) Standoffs fix jaw distance to reference bar at center Capacitive proximity sensors at ends Flexible end mounts Orientation: may be rotated 90 o, or 180 o or on end Water cooling 2 x 5 k. W heaters, coupled with thermal grease LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
Single Jaw Test Thermocouple Locations 2 x 5 k. W Heaters • Thermocouples recessed into Jaw slightly below the surface • Spaced along Heater length and around Jaw circumference • Should yield the Jaw heating profile predicted by the FE analysis 12 x Thermocouples LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
RC 1 Mechanical Prototype Test Purpose: bench top testing of the jaw actuating mechanism in CERN orientations Current Focus: Preliminary engineering definition, system analysis & sizing of components. Target completion …. . mid June Next Milestone: Engineering drawings/detailed design. Target. . Dec • CERN adjustment mechanism used • Add’l CERN Phase 1 components as appropriate • Vacuum tank with easy access • Realistic cooling water feed-throughs and flexible connections • Simplistic control system for jaw aperture and rotation • Minimal instrumentation connections for position, temperature, etc. • Probably no heat loading LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
RC 1 Mechanical Prototype FY 07 RC 1 consists of jaws, tank & actuators - evaluated for horizontal (shown), vertical (90 o) and skew (+/- 45 o) orientations. FY 08, RC 2 Variant: use CERN vac tank, dummy jaws of correct weight LARP LHC PHASE II COLL RC 1 TESTS - S. Lundgren 26 April 2006 No /9
