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Published on January 4, 2008

Author: Wanderer

Source: authorstream.com

System specification of exiting SCRF Infrastructure at CERN:  System specification of exiting SCRF Infrastructure at CERN W. Weingarten/CERN What exists? What is needed (Cahier de charges)? [Investment and operation costs] [Is this sufficient?] What exists?:  What exists? What is needed (Cahier de charges)? (1):  What is needed (Cahier de charges)? (1) B. 118/Chemistry hall: Chemical polishing installation for “low frequency” cavities followed by low pressure water rinsing and drying by alcohol wetting Electro-polishing for “high frequency” cavities followed by high pressure water rinsing High pressure ultra-pure water rinsing stations in closed circuit for both classes of cavities, including equipment for monitoring the water quality (partly missing, to be refurbished) and integrated pumping unit for drying What is needed (Cahier de charges)? (2):  What is needed (Cahier de charges)? (2) B. 252/Assembly hall Ultra-pure water rinsing (6 bar) and alcohol drying station for both classes of cavities, including equipment for monitoring the water quality quality (partly missing, to be refurbished), the cavity being located in front class 1000 laminar flow unit Niobium coating equipment for low frequency cavities Niobium coating equipment for high frequency cavities (missing, but available elsewhere at CERN) “Class 10” clean room including equipment for monitoring air quality (missing, the existing clean room is “class 100”, monitoring system to be refurbished) What is needed (Cahier de charges)? (3):  What is needed (Cahier de charges)? (3) B. SM18/Assembly and testing hall Two vertical cryostats including radiation shield (bunker) for cold tests of “low frequency” cavities in closed loop refrigerator cooling mode (overhaul of cryogenic installation needed) One vertical cryostats including radiation shield (bunker) for cold tests of “high frequency cavities” in “pumping” mode (overhaul of cryogenic installation needed) Temperature mapping system for “low frequency” cavities (subcooled operation) High sensitivity temperature mapping system for 2 K operation (missing) Class 10 clean room for assembly of module including equipment for monitoring air quality (monitoring system to be refurbished) Horizontal radiation shielded testing facility of modules (bunker) in closed loop refrigerator mode including high RF power system (overhaul of cryogenic installation needed, high power and 2 K test for “high frequency” cavities missing) RF control room with low power RF, data acquisition, diagnostics, monitoring and control equipment What is needed (Cahier de charges)? (4):  What is needed (Cahier de charges)? (4) Remark about niobium sheet metal cavities: The installation as described above can be used as well for niobium sheet metal cavities of both low and high frequency (but electro-polishing equipment for “high frequency” cavities no longer available) Investment and operation costs (preliminary estimation):  Investment and operation costs (preliminary estimation) Overhaul of cryogenic installation (as it exists) Distribution 1 MCHF Purification 1 MCHF Operation 1 MCHF per year High power RF TWT 40 kW + power supply 200 kCHF LHC high power klystron (without power supply) 300 kCHF

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