Solid state radio-measuring optical-frequency transducer of gas flow rate

Measuring Solid-State Drive Behavior

Solid-state drives (SSDs) are a potentially revolutionary new storage technology, but it is not clear that current generation drives are inherently superior to hard disks. In order to understand the performance of these new technologies, we measure two commercial SSDs, one from Intel, the other from Kingston, on a workload of 4K writes to randomized addresses across the entire address space of ...

Pressure transducer method for measuring gas production by microorganisms.

A simple method for measuring gas production by microorganisms by using a pressure transducer to sense pressure buildup was developed and tested with members of the coliform group. The test system consisted of a 5.0 lb/in(2) pressure transducer and a pressure equalizer valve attached to the metal cap of a test tube (20 by 150 mm); gas pressure was recorded on a strip-chart recorder. Gas pressur...

Measuring Neutrino Masses Using Radio-Frequency Techniques

We describe a new technique by which the energy spectrum of low energy electrons can be extracted. The technique relies on the detection and measurement of coherent radiation created from the cyclotron motion of charged particles, such as electrons, in strong magnetic fields. The technique proposed relies on the principle that the frequency of cyclotron radiation emitted by the particle depends...

A simple, sensitive and versatile solid-state pressure transducer.

Sympathetic cooling rate of gas-phase ions in a radio-frequency-quadrupole ion trap

ABSTRACT We theoretically investigated the mass dependence of the sympathetic cooling rate of gas-phase ions trapped in a linear radio-frequency-quadrupole ion trap. Using an a priori molecular dynamical calculation, tracing numerically with Newtonian equations of motion, we found that ions with a mass greater than 0.54±0.04 times that of the laser-cooled ions are sympathetically cooled; otherw...