Formation And Life of Metastable Helium
Formation And Life of Metastable Helium
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Olmstead, Physical Review, 16, 282, 1920.
3 Physical Review, 15, 476, 1920.
O. W. Richardson and C. B. Bazzoni, Nature 98, 5, 1916; F. Horton and A. C. Davies, op. Cit. , 42, 752, 1921. 5 Ibid. , 42, 763, 1921.
METASTABLE HELIUM 347 ARCS WITH LOW-FREQUENCY VOLTAGES The arcs were formed between a Wehnelt cathode and nickel anode in a pyrex tube containing carefully purified helium. The helium was purified by passing over heated copper oxide and charcoal immersed in liquid air. Before passing int...o the experi- mental tube the helium passed through two additional charcoal tubes and a liquid-air trap. The tube and liquid-air trap were baked out at 450 C. For several days before the helium was admitted.
In the first experiments the helium was excited by an alternat- ing e. M. F. An electromagnetic oscillograph was used to obtain curves showing the variation of current and voltage with time. From such curves the current-voltage curve may be obtained.
A decided dissymmetry in the growth and decay of the arc current could be observed, and also an apparent continuation of the arc current down to very low voltages.
What to read after Formation And Life of Metastable Helium?
You can find similar books in the "Read Also" column, or choose other free books by Fabian Miller Kannenstine to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Olmstead, Physical Review, 16, 282, 1920.
3 Physical Review, 15, 476, 1920.
O. W. Richardson and C. B. Bazzoni, Nature 98, 5, 1916; F. Horton and A. C. Davies, op. Cit. , 42, 752, 1921. 5 Ibid. , 42, 763, 1921.
METASTABLE HELIUM 347 ARCS WITH LOW-FREQUENCY VOLTAGES The arcs were formed between a Wehnelt cathode and nickel anode in a pyrex tube containing carefully purified helium. The helium was purified by passing over heated copper oxide and charcoal immersed in liquid air. Before passing int...o the experi- mental tube the helium passed through two additional charcoal tubes and a liquid-air trap. The tube and liquid-air trap were baked out at 450 C. For several days before the helium was admitted.
In the first experiments the helium was excited by an alternat- ing e. M. F. An electromagnetic oscillograph was used to obtain curves showing the variation of current and voltage with time. From such curves the current-voltage curve may be obtained.
A decided dissymmetry in the growth and decay of the arc current could be observed, and also an apparent continuation of the arc current down to very low voltages.
What to read after Formation And Life of Metastable Helium?
You can find similar books in the "Read Also" column, or choose other free books by Fabian Miller Kannenstine to read onlineMoreLess
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