By Topic

Cataphoresis in Helium‐Neon Mixtures

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $31
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Schmeltekopf, Arthur L. ; The University of Texas, Austin, Texas

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.1713725 

Cataphoresis in He‐Ne mixtures was studied spectroscopically and the measurements checked by mass spectroscopy. The pressure was varied from 6 to 90 Torr, the wall temperature from 30° to 500°C, and the current from 10 to 500 mA in quartz tubes of 9.52 and 12.7 mm diameter. The results are compared with the theoretical predictions of Druyvesteyn. Cataphoresis improves with increasing pressure, as predicted, except at pressures above 40 Torr, where the quality of cataphoresis improves only slowly with pressure. The slope of the impurity concentration curve does not change linearly with current from 20–100 mA; it increases with current at very low currents and then becomes independent of current. Because of this discrepancy between theory and experiment, a new empirical equation governing cataphoresis in the region of higher currents is suggested. An increase of temperature markedly decreases the effectiveness of cataphoresis. Increasing the tube diameter and decreasing its length also decreases the effectiveness. In order to check for a possible ``retrograde'' cataphoresis some measurements were made with He as a minor constituent in Ne. Spectroscopic observations at the cathode indicate an enhanced He concentration there (retrograde cataphoresis); mass spectroscopic analysis shows that the cataphoresis, while slight, is still normal. The extreme excitation conditions at the cathode render spectral intensity interpretations difficult if not misleading there.

Published in:

Journal of Applied Physics  (Volume:35 ,  Issue: 6 )