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A transistorized pulse generator system for chemical kinetics experiments with a time‐of‐flight mass spectrometer is described.
A new optical technique using a birefringent compensator has been developed to study the natural birefringence of calcite and ADP. Experimental results are compared with those obtained by the usual banded spectrum technique. Application of this method for very highly birefringent substances is...
A commercial 10‐Mc digital chronometer has been used to measure time lags to breakdown in SF 6 ∕air mixtures. This method is much quicker than taking measurements from oscillograms and gives greater accuracy when a very wide range of time lags occurs for the same experimental condition....
Electrical leads can be easily sealed into a pressure vessel by the use of suitably prepared epoxy cement. This technique produces a high pressure plug capable of withstanding at least 24 000 atm of hydrostatic pressure. The vessel with which the plug is used is described briefly.
A particularly simple high resolution differential Čerenkov counter has been constructed and tested in beams of positive particles of 3.75 and 6 BeV∕ c momentum. The π meson, K meson, and proton peaks were well separated, and had full widths at half‐height of about 10 −3 in Δβ. The...
The description of a complete pulsed nuclear resonance spectrometer suitable for experiments in solids is given. Its major features are the ability to operate at any frequency between 2 and 30 Mc, an rf pulse output power of 5 kW over most of this range, a receiving system recovery time of 5–10...
This paper presents the result of calculations on ion deflection and focusing in magnets that have realistic, extended fringing fields rather than sharply cutoff fringing fields. The most important effects of the change from sharp cutoff to extended fringing fields are (a) displacements of the...
A pressure gauge having a risetime of 0.1 μsec, no overshoot, a dwell time of 5 μsec, and capable of sensing a pressure jump of 10 mm Hg is described. Pressure‐time traces obtained with the gauge on the end wall of the 17‐in.‐diam low pressure shock tube at the Graduate Aeronautical...
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