SPL cryo-module conceptual design review Cavity, helium vessel and tuner assembly N. Valverde, G. Arnau, S. Atieh, I. Aviles, O. Capatina, M. Esposito,

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Presentation transcript:

SPL cryo-module conceptual design review Cavity, helium vessel and tuner assembly N. Valverde, G. Arnau, S. Atieh, I. Aviles, O. Capatina, M. Esposito, F. Pillon, T. Renaglia, T. Tardy CERN, 4 Nov. 2011

SPL cryo-module conceptual design review CERN, 4 Nov A string of 4 equipped β=1 bulk niobium cavities to be tested into a short cryo-module INTRODUCTION- CAVITY SPL mm

SPL cryo-module conceptual design review CERN, 4 Nov CAVITY HELIUM TANK TUNER POWER COUPLER INTERCAVITY SUPPOR SYSTEM HOM COUPLER INTERFACES INTER-CAVITY CONCLUSIONS OVERVIEW

SPL cryo-module conceptual design review CERN, 4 Nov INTRODUCTION- CAVITY SPL Power Coupler Bulk Niobium 5Cells cavity Helium Tank Tuner Hom Coupler Helium tube Magnetic shielding Interface tank Bellows

SPL cryo-module conceptual design review CERN, 4 Nov CAVITY 4 cavities to be manufactured : 3 at the industry + 1 at CERN (Tbc) mm cell cavity Material: Bulk Niobium Flanges: SS Frequency: MHz Quality factor: Nominal gradient E acc = 25 MV/m Standard delivery: 11 M Min Thck= 3mm Dimensions at warm temperature

SPL cryo-module conceptual design review CERN, 4 Nov CAVITY Half-cells fabricated by spinning and welded by EB welding. Cavity made of Niobium and SS flanges Min Thck= 3mm Nb tubes are joined to the SS CF flanges by Brazing with pure Cu filler metal. The joint of the SS bellow support to the Nb cavity also by brazing.

SPL cryo-module conceptual design review CERN, 4 Nov HELIUM TANK Designed by CERN (SS material) To be manufactured by CEA Assembly cavity-tank by CERN

SPL cryo-module conceptual design review CERN, 4 Nov Functions are fulfilled: Cryogenic– Keep the helium II (2K) and allowing extraction of the heat dissipated into the cavity. Structural – To transmit the effort applied by the tuner to the cavity. Design pressure 1.5 bars => not considered as pressure vessel HELIUM TANK

SPL cryo-module conceptual design review CERN, 4 Nov HELIUM TANK Support for helium tube

SPL cryo-module conceptual design review CERN, 4 Nov HELIUM TANK Interface for alignment supports The alignment system supports are designed by the cryo-module team compatible with all adjacent equipment (magnetic shielding etc...)

SPL cryo-module conceptual design review CERN, 4 Nov HELIUM TANK Fixation for Magnetic shielding Handling support

SPL cryo-module conceptual design review CERN, 4 Nov SS CF UHV DN100, tube dia 80 mm -It has been designed to extract the heat in a nominal performance (pulsed). HELIUM TANK- Interface Cryo SS CF UHV DN 40, tube dia 27 mm. In principle not needed in a first phase. Will be closed with a flange. Needs to be defined by cryo if instrumentation (ex. heaters...) or other equipments (ex. helium supply pipe...) need to be installed before assembly of the helium tank.

SPL cryo-module conceptual design review CERN, 4 Nov TUNER To be supplied by CEA To be installed by CERN during the assembly of the cryo-module Instrumentation / control cables

SPL cryo-module conceptual design review CERN, 4 Nov Designed and provided by CERN (BE/RF) POWER COUPLER Requirements to fulfill: RF Electric continuity Support for the cavity  (The cavity + tank is not designed for cantilever supporting) CF “RF type LHC” gasket 2 flanges SS CF UHV DN 100, tube DIA 100 Schematic view

SPL cryo-module conceptual design review CERN, 4 Nov POWER COUPLER The double-walled tube of the main coupler will need to be actively cooled The cooling circuit in/out are foreseen inside the cryostat vacuum See talk Paulo for more info double wall coupler

SPL cryo-module conceptual design review CERN, 4 Nov Interfaces foreseen on the helium tank for the second support of the cavity: the « intercavity supporting system » Intercavity support system CF “RF type LHC” gasket 2 flanges SS CF See talk Arnaud for more info inter-cavity supporting system

SPL cryo-module conceptual design review CERN, 4 Nov HOM: Not installed at the first stage. The cavity will be delivered closed with a flange at the HOM port. It has to be foreseen a cooling system at the cryo-module for the HOM installation in a later phase. HOM COUPLER

SPL cryo-module conceptual design review CERN, 4 Nov INTERFACES INTER-CAVITIES SS bellow not actively cooled. CF SS flanges + standard gasket. Instrumentation cable (temperature) to be foreseen. Position for Temperature measurement

SPL cryo-module conceptual design review CERN, 4 Nov Conclusions Niobium cavities manufacturing procedure ongoing. This review will allow us to go ahead (or modify) with the design of the helium tank for the cavities. This design has then to be provided to CEA for manufacturing.

SPL cryo-module conceptual design review CERN, 4 Nov FIN

SPL cryo-module conceptual design review CERN, 4 Nov. 2011

SPL cryo-module conceptual design review Prévoir Piece intermediaire Train de cavite assemble en Salle blanche

SPL cryo-module conceptual design review CERN, 4 Nov Brazing Nb / SS 316 LN is a key technology Developed at CERN in the Joint design: Difference in dilatation of Nb/SS Nb tube fitted to SS flange Clearance ≤ 20 µm SS plug to expand the Nb Pure Cu filler metal Brazing temperature 1100°C, ∆ time << P< mbar

SPL cryo-module conceptual design review CERN, 4 Nov. 2011