File:American X-ray journal (1899) (14570146169).jpg

Identifier: americanxrayjour5618unse (find matches)
Title: American X-ray journal
Year: 1900 (1900s)
Authors:
Subjects: X-Rays Radiography
Publisher: St. Louis : American X-Ray Publishing Co.
Contributing Library: The College of Physicians of Philadelphia Historical Medical Library
Digitizing Sponsor: Open Knowledge Commons and the National Endowment for the Humanities

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agm; practicallyall the waves which are used comethrough the central opening in the inter-nal diaphragm, so that the utilized radi-ant area is always small. NOTE XLV1—THE ANODE RUSH. In Note xx the anode rush was men-tioned and its effects on the target figur-ed in Note xxi. Here is a figure of the 594 THE AMERICAN X-RAY JOURNAL. deposit it produces on the glass wall ofthe tube. Fig. 44 is a half-tone from a pho-tograph of a hollow target intermolecu-lar regenerative tube which has beenexcited 600 hours without repumping.Notice the central dark figure from thevicinity of which branched sprays likelightning discharges are given off. Theyare light on a dark ground, In addi-tion to this central figure observe others,one on each side, also with branchingfigures. If the tube could be turnedone-fourth on its long axis the dark cen-tral deposit would be found at about theplace where the anode rush would strikethe glass if it was given off perpendicu-larly to the surface of the target. This
Text Appearing After Image:
Fig. 43.—Internal Diaphragm Tube Excited tube having been run for investigationhas been purposely kept in harmonywith the generator. In Fig. 45 is showna tube, which has been purposely runout of harmony to show discord as avisible metallic deposit on the glass, toillustrate the importance of havingthings in tune if we wish to economizepower. Here the Crookes stream waskept flashing and spattering. By usinga powerful generator, carefully focusingthe Crookes stream on the target andusing a very light gas for the vacuum,I have seen one form of the anode rush.The platinum target must be very thickor it will be perforated in a moment,because the sudden stopping of the Crookes stream at the impact area ofthe target raises the platinum to vividincandescence, small pieces of themelted metal, being thrown off, remain-ing visible as minute stars even at a dis-tance of half an inch in front of the tar-get. These stars do not come off exact-ly perpendicularly to the surface, butspread, and if I

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