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We have developed a simple, all Pyrex, 60 cm active length laser tube in a self-heating geometry. For a He pressure of 20 Torr and a current of 120 mA, the laser power was 28 mW on seven lines in the blue-green region. By spectroscopic measurements we have determined the influence of metal vapor presence on the intensity of a helium line. Some modifications of the vapor clouds generated by a magnetic field are reported.
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