1. Presented in IIFC meeting on 27-Oct-2010 at RRCAT, Indore

5. Length of a half-cell of the cavity =L/2 =70 mm. Iris radius = R iris = 50.4 mm. Dome (equator) radius = D/2 = 188.2mm. Equator ellipse ratio = A/B = 45 mm/47 mm. Iris ellipse ratio = a/b = 12.5 mm/15 mm. E-field profile along the axis Frequency: 704.4 MHz

6. Bead-pull measurement -- special technique adopted Using Phase-shift technique instead of frequency-shift In manufacturing or tuning multi-cell cavity, it is required to investigate the field profile inside the cavity The Field can be sampled by introducing a perturbing object and measuring its change in f 0 The object must be very small so that the field does not vary significantly over its largest linear dimension: it is a perturbation method Phase deviation is much easier to observe than frequency change especially for small perturbation. PHASE (Degrees)IMPEDANCE

7. Length of a half-cell of the cavity = L/2 =70.34 mm. Iris radius = R iris = 41.5 mm. Dome (equator) radius = D/2 = 194.95 mm. Equator ellipse ratio = A/B = 54mm/58 mm. Iris ellipse ratio = a/b = 14 mm. /25 mm. Frequency: 650 MHz

9. Length of a half-cell of the cavity = L/2 =70.38 mm. Iris radius = R iris = 43.5 mm. Dome (equator) radius = D/2 = 200.8 mm. Equator ellipse ratio = A/B = 45 mm/47 mm. Iris ellipse ratio = a/b = 15 mm. /15 mm. Frequency: 650 MHz

15. DIE DRAWING FOR HALF-CELL CAVITY

16. Impurities: H 2  2 Wt. ppm W  0.007% C  10 Wt. ppm Ti  0.005% N 2  10 Wt. ppm Fe  0.003% O 2  10 Wt. ppm Si  0.003% Ta  500 Wt. ppm Mo  0.005% Ni  0.003%

18. Liquid Helium Liquid Nitrogen Cryostat Scheme

22. Design – 3: Cryostat with vertical and horizontal cavity

23. DesignThicknessExternal PressureInternal Stress IInner VesselCylindrical Shell3 mm11.8 psi6870 psi Torispherical head31.9 psi12289 psi Cylindrical Shell4 mm24 psi5078 psi Torispherical head52 psi9065 psi Outer VesselCylindrical Shell5 mm12 psi9028 psi Torispherical head17.3 psi16055 psi Cylindrical Shell6 mm17.1 psi7657 psi Torispherical head21.7 psi13607 psi IIInner VesselCylindrical Shell3 mm12.2 psi8252 psi Torispherical head24 psi14541 psi Cylindrical Shell4 mm22.5 psi6015 psi Torispherical head40 psi10726 psi Outer VesselCylindrical Shell5 mm15.2 psi8980 psi Torispherical head17.1 psi15829 psi Cylindrical Shell6 mm21 psi7616 psi Torispherical head22 psi6711 psi IIIInner VesselCylindrical Shell2 mm17 psi8789psi Torispherical head21.2 psi15646 psi Cylindrical Shell3 mm42 psi5823 psi Torispherical head40.9 psi10344 psi Cylindrical Shell4 mm73.5 psi4387 psi Torispherical head60.6 psi7776 psi Outer VesselCylindrical Shell5 mm10 psi11349 psi Torispherical head12.2 psi19368 psi Cylindrical Shell6 mm15.3 psi9431psi Torispherical head16.2 psi16749 psi Cylindrical Shell8 mm29.5 psi7077 psi Torispherical head24 psi12550 psi Table 1: Design details for inner and outer vessels

24. OptionFlangeThicknessInt. stress (UG-34)Ext. pressure (Apx-2)Int. stress (Apx-2) I Inner Vessel 30 mm11326 psi1179 psi20215 psi 39 mm6650 psi693 psi11869 psi Outer Vessel 40 mm26737 psi5191 psi26445 psi 50 mm17636 psi3423 psi17435 psi II Inner Vessel 30 mm11400 psi394 psi7773 psi 39 mm6745 psi235 psi4625 psi Outer Vessel 40 mm26345 psi3464 psi26540 psi 50 mm17462 psi2285 psi17447 psi III Inner Vessel 30 mm11392 psi556 psi10953 psi 39 mm6790 psi331 psi6527 psi Outer Vessel 55 mm21365 psi3888 psi15879 psi 60 mm17953 psi3267 psi13342 psi Table 2 : Design details for Main Flanges inner and outer vessels

25. Result for thermal analysis

28. High power RF Source development IOT based RF Amplifier, 60KWatt at 704.4 MHz Compared to klystrons, IOTs exhibits very interesting characteristics in terms of efficiency (> 65% is usually reached), linearity and compactness. operating at 460-800 MHz, with powers up to 60 kW CW, compatible with our requirement. We have selected TH 793 IOT for 704.4 MHz and also for 650 MHz operation Maintenance is simpler -- replacement of the tube only IOT can be re-gunned twice, at about 60% cost of a new IOT Output RF cavities are external to tube.

29. IOT amplifier cavity

30. DC POWER SUPPLIES

31. Pulse step technology is recommended for RF amplifier kind of load where high efficiency, regulation speed and accuracy, and compatibility with large variation of the load impedance. Moreover, the modular concept with high redundancy (up to 10% defective modules without performance degradation) makes it very reliable, easy to maintain and avoiding of HV crowbar tubes. Pulse-Step-Modulation (PSM) Control scheme

32. HV DC POWER SUPPLY

33. OTHER DC POWER SUPPLIES FILAMENT P/SCONTROL GRID P/S ION PUMP P/SFOCUS COIL P/S PROCUREMENT OF ALL P/S IS IN PROGRESS.