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Oct 2009

Volume 80, Issue 10, Articles (10xxxx)

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Rev. Sci. Instrum. 80, 101101 (2009); http://dx.doi.org/10.1063/1.3236681 (22 pages)

David D. Nolte

Biodisks are lab-on-a-chip device that spin. The two major types of biodisks are centrifugal microfluidic disks and BioCDs. The microfluidic disks use noninertial forces to pump and switch fluids. The BioCDs use lasers and high-frequency optical sampling to rapidly measure target analytes bound to recognition molecules.

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Experimental method for in situ determination of material textures at simultaneous high pressure and high temperature by means of radial diffraction in the diamond anvil cell

Hanns-Peter Liermann, Sébastien Merkel, Lowell Miyagi, Hans-Rudolf Wenk, Guoyin Shen, Hyunchae Cynn, and William J. Evans

Rev. Sci. Instrum. 80, 104501 (2009); http://dx.doi.org/10.1063/1.3236365 (8 pages) | Cited 7 times

Online Publication Date: 13 October 2009

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We introduce the design and capabilities of a resistive heated diamond anvil cell that can be used for side diffraction at simultaneous high pressure and high temperature. The device can be used to study lattice-preferred orientations in polycrystalline samples up to temperatures of 1100 K and pressures of 36 GPa. Capabilities of the instrument are demonstrated with preliminary results on the development of textures in the bcc, fcc, and hcp polymorphs of iron during a nonhydrostatic compression experiment at simultaneous high pressure and high temperature.
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07.35.+k High-pressure apparatus; shock tubes; diamond anvil cells
06.30.-k Measurements common to several branches of physics and astronomy
07.20.Ka High-temperature instrumentation; pyrometers
81.70.-q Methods of materials testing and analysis

The entrance system laboratory prototype for an advanced mass and ionic charge composition experiment

F. Allegrini, M. I. Desai, R. Livi, S. Livi, D. J. McComas, and B. Randol

Rev. Sci. Instrum. 80, 104502 (2009); http://dx.doi.org/10.1063/1.3247906 (7 pages) | Cited 2 times

Online Publication Date: 26 October 2009

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Electrostatic analyzers (ESA) have been used extensively for the characterization of plasmas in a variety of space environments. They vary in shape, geometry, and size and are adapted to the specific particle population to be measured and the configuration of the spacecraft. Their main function is to select the energy per charge of the particles within a passband. An energy-per-charge range larger than that of the passband can be sampled by varying the voltage difference between the ESA electrodes. The voltage sweep takes time and reduces the duty cycle for a particular energy-per-charge passband. Our design approach for an advanced mass and ionic charge composition experiment (AMICCE) has a novel electrostatic analyzer that essentially serves as a spectrograph and selects ions simultaneously over a broad range of energy-per-charge (E/q). Only three voltage settings are required to cover the entire range from ∼ 10 to 270 keV/q, thus dramatically increasing the product of the geometric factor times the duty cycle when compared with other instruments. In this paper, we describe the AMICCE concept with particular emphasis on the prototype of the entrance system (ESA and collimator), which we designed, developed, and tested. We also present comparisons of the laboratory results with electrostatic simulations.
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94.80.+g Instrumentation for space plasma physics, ionosphere, and magnetosphere
07.75.+h Mass spectrometers
52.72.+v Laboratory studies of space- and astrophysical-plasma processes
95.30.Qd Magnetohydrodynamics and plasmas
95.55.-n Astronomical and space-research instrumentation
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