AMI MASCHINENBAU-KOLLOQUIUM Kavitäten Komponenten die beschleunigen - Mechanische Konstruktion -Simulation - Fertigung Markus Bopp, Sektion HF
Einige Kavitäten am PSI 150 MHz Resonator, Injektor 2 1.50 GHz supraleitende Kavität, SLS 50 MHz Resonator, Inj. 2 50 MHz Kavität, Ring Neue 50 MHz Cu- Kavität, Ring 500 MHz Kavität, SLS
Grundprinzip der Beschleunigung Vakuum P + Kavität + 1eV 1 V 1eV = 1.6022E-19 J durchl. Spannung [V] v Proton relativistisch [m/s] v / co relativistisch [-] m / mo 1 13 841 0.00005 1.0000 10 43 770 0.00015 1.0000 100 138 413 0.00046 1.0000 1 000 437 701 0.00146 1.0000 10 000 1 384 122 0.00462 1.0000 100 000 4 376 663 0.01460 1.0001 1 000 000 13 830 278 0.04613 1.0010 10 000 000 43 423 800 0.14484 1.0106 Injektor 2 72 000 000 111 150 321 0.37075 1.0767 100 000 000 128 371 892 0.42819 1.1065 Ring 590 000 000 236 646 099 0.78935 1.6288 1 000 000 000 262 331 851 0.87502 2.0657 [-] F = Q * E; W = Q * E * s
Spannungsverteilung in der Ring-Kavität H L B 50 MHz Alu-Kavität, Ring
590 MeV Ring Cyclotron
590 MeV Ring Cyclotron - 8 Sector Magnets 1 T - 4 Accelerator Cavities 730 kv - Injection energy: 72 MeV - Extraction energy: 590 MeV - Accelerator frequency: 50.63 MHz - Beam current: 1.85 ma - Commissioned: 1974
590 MeV Ring Cyclotron - 8 Sector Magnets 1 T - 4 Accelerator Cavities 730 kv - Injection energy: 72 MeV - Extraction energy: 590 MeV - Accelerator frequency: 50.63 MHz - Beam current: 1.85 ma - Commissioned: 1974
The New 50 MHz Ring Cyclotron Cavity Specification Resonance frequency: Accelerating voltage: Dissipated power: Tuning range: Cavity wall: Support structure: Vacuum pressure: Cooling water flow: Dimension: Weight: 50.6328 MHz 1.4 MV 500 kw 540 khz Cu-OFHC 316LN 1e-6 mbar 34 m3/h 5.6x3.9x0.95 m 25'000 kg
HF-Verstärkerkette Verstärkerstufe, 1 x 1 x 3m, 1.5 t Regelung, 1kW, 10kW 800 kw Verstärkerstufe
Kühlung Kühlanlage, 3 MW
Vakuum und Hydraulik Vakuumpumpstand an Cu-Kavität Hydraulikanlage, Tuning Druck max. 70 bar
alte Alu-Kavität Neue Cu-Kavität 0 2 4 m Strahlebene Strahlspalt 50 MHz Alu-Kavität, Ring Neue 50 MHz Cu- Kavität, Ring
Hydraulic tuning yokes Beam plane Support structure RF-Volume
Cavity shell Cooling channels RF-Port Beam slit Vacuum port Cooling water outlet Cooling water inlet
Inside the Cavity Coupling loop
Simulation (ANSYS-Multiphysics) - Inner dimensions of the cavity (vacuum volume)? - Frequency drift (thermal, atmospheric pressure)? - Temperature distribution? - Tuning Range? - Effect of manufacturing tolerances?
3D-Models RF-Model Mechanical / Thermal Model 20 Node Brick Element (HF120) 85 423 Nodes 18 954 Elements 8 Node Brick Element (Solid45/Solid70) 334 205 Nodes 292 484 Elements
Coupled Field Analysis RF-Simulation (Modal) - undeformed RF-Geometry - H- and E-Field - Resonance Frequency - Q-Value
Heatflux distribution scaled to 500 kw Magnetic field
Coupled Field Analysis RF-Simulation (Modal) - undeformed RF-Geometry Thermal-Simulation - heat flux - forced convection (cooling) - natural convection/ambient temperature) - H- and E-Field - Resonance Frequency - Q-Value - Temperature distribution
Temperature distribution @ 500 kw dissipated RF-power
Coupled Field Analysis RF-Simulation (Modal) - undeformed RF-Geometry Thermal-Simulation - heat flux - forced convection (cooling) - natural convection/ambient temperature) - H- and E-Field - Resonance Frequency - Q-Value - Temperature distribution Structural-Simulation - results from thermal simulation - atmospheric pressure - hydraulic tuning forces - Deformation - Stress
Deformed RF-Model Deformed mech. Model
Coupled Field Analysis RF-Simulation (Modal) - undeformed RF-Geometry Thermal-Simulation - heat flux - forced convection (cooling) - natural convection/ambient temperature) - H- and E-Field - Resonance Frequency - Q-Value - Temperature distribution Structural-Simulation - results from thermal simulation - atmospheric pressure - hydraulic tuning forces RF-Simulation (Modal) - deformed RF-Geometry - Deformation - Stress - Frequency drift - H- and E-Field - Resonance Frequency - Q-Value
Fertigung - Masshaltigkeit (Frequenz) - Dichtigkeit (Vakuum) - Oberflächenbeschaffenheit (Verluste, Vakuum, Hochspannung)
Lieferant SDMS La chaudronnerie blanche ZI Les Condamines BP 4 38160 Saint-Romans France www.sdms.fr
Support Structure - 316LN
Tuning yokes - 316LN
Electron Beam Welding EB-Weld
TIG-Brazing Copper / Stainless Steel CuAl8 - Filler Material Cu-OFHC 316LN
Cu-Welding Front/End-Plate Cu-OFHC
Cooling Channels 316LN CuAl8 (Filler Material) Cu-OFHC
Cold Tests PAUL SCHERRER INSTITUT Frequency? Q-Value? Tuning range? Hydraulic unit
Cold test of the cavity cooling system Flow rate = 34m 3 /h
Vacuum test PAUL SCHERRER INSTITUT Pressure <= 1e-6 mbar Leak rate <= 1e-6 mbar*l/s
Site Acceptance Test 24h Test run
Case Simulation Measured Ambient conditions f 51.040 MHz Ambient Temp. 25 C 51.105 MHz Ambient Temp. 18 C Q 46050 45130 Vacuum f 50.451 MHz Ambient air 1000 mbar; 25 C 50.472 MHz Ambient Air 975 mbar; 18 C Q 45080 44284 Tuning range f 536 khz 548 khz Thermal Drift f -96 khz Ambient Temp. 25 C -64 khz Ambient Temp. 31 C
Abstimmbereich (Messung 04.02.03 bei SDMS) 51.1 51 50.9 Hydraulik: ~ 8 khz / bar Luftdruckschwankungen: ~ 670 Hz / mbar 50.8 MHz 50.7 50.6 50.5 50.4 Weg: ~ 34 khz / mm (in Strahlebene) ~ 35 khz / mm (bei Wegaufnehmer mittlerer Hydraulikbügel) ~ 58 khz / mm (bei Wegaufnehmer äusserer Hydraulikbügel) 0 10 20 30 40 50 60 70 bar
Installed in the Ring Cyclotron, January 2004
Nächste Kavitäten - 50 MHz Cu-Kavitäten, Ring, 3 Stück, Fertigung - 500 MHz Buncher, zw. Inj. 2 und Ring, Fertigung - 50 MHz Resonator für Injektor 2, in Planung - 1.5 GHz HF-Kanone, LEG-Projekt, in Planung - 150 MHz Buncher, in 870 kev-linie, in Planung
500 MHz Buncher, zw. Inj. 2 und Ring 0 250 500 mm Resonance frequency: Gap voltage: Dissipated power: Cavity wall: 506.328 MHz 218 kv 30 kw Cu-OFHC
50 MHz Resonator für Injektor 2 Resonance frequency: Gap voltage: Dissipated power: Cavity wall: 50.6 MHz 500 kv 120 kw Alu 99.5 3 m 1.5 0 Injektor 2, Resonator 4
1.5 GHz HF-Kanone für LEG-Projekt f: 1.5 GHz Vc: 40 MV/m P: 10 MW (gepulst 4μs, f rep 10Hz) Werkstoff: Cu-OFHC Vakuum: UHV 0 100 200 mm
150 MHz Buncher, 870 kev-linie 0 100 200 mm f: 150 MHz Vc: 3.0 kv P: 10 W Werkstoff: Cu-OFHC
Mechanical Model Deformation under hydraulic tuning forces