Superconducting niobium cavities of improved thermal conductivity
Conference
·
· IEEE Trans. Magn.; (United States)
OSTI ID:6338588
The construction of large scale superconducting accelerators asks for reliable and economical manufacturing procedures for the superconducting cavities. The improvement of thermal conductivity of the niobium used can be of great benefit in that respect. We have built and tested single cell cavities at 500 MHz and 3 GHz from a newly available niobium sheet material of improved thermal conductivity. At 500 MHz a maximum accelerating field of 13.0 MV/m at 4.2 K was achieved. At 3 GHz and 1.5 K as a best result 18.7 MV/m were obtained. A total of 15 cavity tests were carried out and the results clearly exceed field values obtained so far with standard reactor grade niobium at CERN and Wuppertal. Measurements of the thermal conductivity of niobium at helium temperatures are discussed, the temperature dependence of the surface resistance of high purity niobium is given, the observed field and Q limitations and electron loading phenomena are outlined.
- Research Organization:
- CERN, European Organization for Nuclear Research, Geneva
- OSTI ID:
- 6338588
- Report Number(s):
- CONF-840937-
- Conference Information:
- Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG 21:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
ACCELERATORS
ALLOYS
ATMOSPHERES
CAVITY RESONATORS
CONTROLLED ATMOSPHERES
ELECTRON TRANSFER
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY
EQUIPMENT
FABRICATION
FLUIDS
FREQUENCY RANGE
GASES
GHZ RANGE
GHZ RANGE 01-100
HELIUM
MHZ RANGE
MHZ RANGE 100-1000
NIOBIUM ALLOYS
NONMETALS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
Q-VALUE
RARE GASES
RESONATORS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
TESTING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES
360104 -- Metals & Alloys-- Physical Properties
43 PARTICLE ACCELERATORS
430100* -- Particle Accelerators-- Design
Development
& Operation
ACCELERATORS
ALLOYS
ATMOSPHERES
CAVITY RESONATORS
CONTROLLED ATMOSPHERES
ELECTRON TRANSFER
ELECTRONIC EQUIPMENT
ELEMENTS
ENERGY
EQUIPMENT
FABRICATION
FLUIDS
FREQUENCY RANGE
GASES
GHZ RANGE
GHZ RANGE 01-100
HELIUM
MHZ RANGE
MHZ RANGE 100-1000
NIOBIUM ALLOYS
NONMETALS
PERFORMANCE TESTING
PHYSICAL PROPERTIES
Q-VALUE
RARE GASES
RESONATORS
SUPERCONDUCTING CAVITY RESONATORS
SUPERCONDUCTING DEVICES
TESTING
THERMAL CONDUCTIVITY
THERMODYNAMIC PROPERTIES