Conveners
C3OrG - Cryogenic Instrumentation and Control Systems
- Glen McIntosh (McIntosh Cryogenics, LLC)
- Peter Shirron (NASA/GSFC)
Scott Courts
(Lake Shore Cryotronics, Inc.)
7/1/15, 2:00 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Much of the work to develop internationally recognized temperature scales over the past 50 years was performed with thermometers whose sensing elements were constructed from platinum wire, rhodium-iron wire, or doped germanium elements. For high stability the best results were obtained when the sensing element was strain-free mounted which reduced the effects of temperature-induced mechanical...
Rajinikumar Ramalingam
7/1/15, 2:15 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
The sensor characteristics of a coated Fiber Bragg grating (FBG) cryogenic temperature sensor depends mainly on the coating materials. The sensitivity of the coated FBG can be improved by enhancing the effective thermal strain transfer between the layers and the bare FBG. The dual coated FBG’s has a primary layer and the secondary coating layer. The primary coating layer acts as an...
Mr
Jérôme ANDRE
(CEA-SBT, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France)
7/1/15, 2:30 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
In the framework of the ITER project, the CEA-SBT has been contracted to supply 277 venturi tube flowmeters to measure the distribution of helium in the superconducting magnets of the ITER tokamak. Six sizes of Venturi tube have been designed so as to span a measurable helium flowrate range from 0.1 g/s to 400 g/s. They operate, in nominal conditions, either at 4K or at 300K, and in a nuclear...
Prof.
Minoru Takeda
(Kobe University)
7/1/15, 2:45 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
To establish hydrogen worldwide storage and marine transportation, it is important to develop liquid hydrogen tanks/carriers like liquefied natural gas tanks/carriers as well as a long level sensor such as a superconducting magnesium diboride (MgB2) level sensor. In the case of lengthening the MgB2 level sensor, a whole MgB2 wire needs uniform superconducting characteristics. Long MgB2 wires...
Peter Shirron
(NASA/GSFC)
7/1/15, 3:00 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Heat switches are critical to many low temperature applications, where control of heat flow and selective thermal isolation are required. Their designs tend to be driven by the need for the lowest possible off-state conductance, while meeting requirements for on-state conduction. As a result, heat switches tend to be designed as close as possible to the limits of material strength and...
Bernard ROUSSET
(CEA Grenoble)
7/1/15, 3:15 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Power generation in the next decades could be provided by thermo-nuclear fusion reactors like tokamaks.
There inside, the fusion reaction takes place thanks to the generation of plasmas at hundreds of millions of degrees that must be confined magnetically with superconductive coils, cooled down to about 4.4K.
The plasma works cyclically and the coil system is subject to pulsed heat loads...
Dr
Sergiy Putselyk
(Deutsches Elektronen-Synchrotron (DESY))
7/1/15, 3:30 PM
CEC-15 - Instrumentation and Controls
Contributed Oral Presentation
Since 2007, the European X-ray Free Electron Laser (XFEL) is being constructed at DESY, Germany. 800 superconducting niobium 1.3 GHz nine cell cavities and 100 superconducting magnet packages will be operated in a liquid helium II bath at 2K. The static and dynamic heat loads at 2K result in a vapour mass flow up to 96 g/s at 3100 Pa. A four stage cold compressor system is used to return the...
