an x-ray tube ranges between 0*2 of amilliampere for hard tubes, and 1*0 milliampere for soft tubes.With larger currents than these the tubes quickly become over-heated. A current between 0*5 and 1*0 milliampere is sufficient forgood average work. When a direct current galvanometer is connected up… … Fig. 11.—Another Form of Valve Tube (Cossor). tions. Sometimes, especially with low tubes, the deflection indicatesthat the inverse current is the greater; in other tubes the deflectionindicates a predominance of current in the right direction. In anycase, the insertion of a valve tube alters the…
X-rays · Radiography
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