Volume 79, Issue 3, March 2008
Index of content:
We describe the design, construction, and performance of three generations of superconducting Ioffe magnetic traps. The first two are low current traps, built from four racetrack shaped quadrupolecoils and two solenoid assemblies. Coils are wet wound with multifilament NbTi superconducting wires embedded in epoxy matrices. The magnet bore diameters are 51 and with identical trap depths of at their operating currents and at . A third trap uses a high current accelerator-type quadrupolemagnet and two low current solenoids. This trap has a bore diameter of and tested trap depth of . Both low current traps show signs of excessive training. The high current hybrid trap, on the other hand, exhibits good training behavior and is amenable to quench protection.
An optical high-pressure cell for transient grating measurements of biological substance with a high reproducibility79(2008); http://dx.doi.org/10.1063/1.2894331View Description Hide Description
We describe a high-pressure optical cell that can be used for time-resolved transient grating measurements to determine the thermodynamic properties of transient species under high pressure. This high-pressurecell enables us to compare the grating signal intensities of different samples quantitatively. Using this high-pressurecell with an inner sample cell, one can measure various thermodynamic properties of a biological substance in time domain. The stability and reproducibility of this apparatus are described.