Conveners
C1PoK - Instrumentation, Visualization, and Controls I
- Scott Courts (Lake Shore Cryotronics, Inc.)
- Austin Capers (Scientific Instruments)
The low temperature measurement station called CABTR (Centrale d’Acquisition Basses Températures Rapide) is an instrumentation, recently developed by CEA, and dedicated to the cryogenic temperature measurement.
Thanks to its data rate acquisition up to 1 kHz/channel and its lock-in measurement to be lowly sensitive to the industrial harsh environment, the CABTR permits to observe fast...
CEA/SBT has to deliver 277 flowmeters for the control of the ITER superconducting magnets. Some of the flowmeters will operate at room temperature while the remaining ones will operate at cryogenic temperature (5 bar and 5 K, typically). Within the framework of this contract, CEA/SBT has to measure the flow coefficient of the flowmeters that takes into account the fact that the fluid is not...
A new approach for automotive hydrogen storage systems is the so-called cryo-compressed hydrogen storage (CcH2). It has a potential for increased energy densities and thus bigger hydrogen amounts onboard, which is the main attractiveness for car manufacturers such as BMW. This system has further advantages in terms of safety, refueling and cooling potential.
The current filling level...
A cooling system is developed for femtosecond laser experiment. The system includes a vacuum tank and a cooling chamber. It uses liquid nitrogen and helium as cold source and resistive heater as power source which heats the cooled crystal. With the controlling strategy of PID, it can make the temperature of the cooled crystal changed continuously from 5 to 300K. In this paper, the structure of...
Flow balancing orifice (FBO) are used in ITER Toroidal Field coil to uniform flow rate of the cooling gas in the side double pancakes which have a different length of the conductor of 99 m and 305 m,respectively.FBO consist of straight parts, elbows which are produced from 316L,tube 21.34 x 2.11 mm and orifices which are machined from the 316L rod. Each of right and left FBO contains 6...
A fundamental problem with high temperature superconductors (HTS) is the high Tc values themselves and the stability that they impart. Low normal propagation velocities and high stability of HTS wires cause localized damage of magnet coils when there is a quench. Protection of HTS magnets for reliable operation has proven to be a challenge, particularly in Rare Earth Barium Copper Oxide...
40 T hybrid magnet combining a set of resistive magnet with a superconducting outsert, was carried out at High Magnetic Field Laboratory, Chinese Academic of Science (CHMFL). The superconducting magnet is forced flow cooled with supercritical helium at a temperature of 4.5 K and pressure above 5 bar. The cryogenic Distribution Box distribute refrigeration power to the outsert superconducting...
This papers deals with the Japan Torus-60 Super Advanced fusion experiment JT-60SA cryogenic system. It follows the results exposed in [1], in which a model of the whole JT-60SA cryogenic system has been presented, and in which PI controllers parameters have been calculated and simulated with a model-based approach. This paper will present the experimental results obtained on the refrigerator...
Increasingly, exported forces and torques (EFT) from cryocoolers and other mechanisms are a system level concern with lower levels becoming the norm for instruments with cryocoolers. EFT targets of ≤ 50 mN force and ≤ 25 mN-m torque in the 0-500 Hz range are expected. To meet these targets, Ball Aerospace developed both a low EFT cryocooler mount and a facility in which to make these...
Present cryogenic valves are mostly driven by pneumatic actuators. In general, PLC generated electrical analogue or digital signals are guiding control valves via an electro-pneumatic positioner and digital valves by switching an electromagnetic pneumatic pilot valve. One important advantage of pneumatic actuators is the failsafe function, either closed or open, in case of energy loss....
The JT-60U is being upgraded to a full-superconducting tokamak referred as the JT-60 Super Advanced (JT-60SA) as one of the JA-EU broader approach projects. JT-60SA will use superconducting magnets to confine the plasma and achieve a plasma current with a typical flat top duration of 100 second in purely inductive mode. The JT-60SA refrigerator will provide supercritical helium at 4.4 K for...
Cryogenic valves built into vacuum isolated coldboxes have to meet high requirements when it comes to tightness to vacuum, tightness to ambient, seat tightness or operational behavior. Since cryogenic tests are cost and time expensive, testing of valves during the manufacturing process is usually done at room temperature. Cryogenic tests however are sometimes necessary due to specific customer...
Use of Fiber Bragg Grating (FBG) sensor is very appealing for sensing low temperature and strain in superconducting magnets because of their miniature size and the possibility of accommodating many sensors in a single fiber. The main drawback is their low intrinsic thermal sensitivity at low temperatures below 120 K. Approaching cryogenic temperatures, temperature changes lower than a few...
