Sharma, Lakhi and Roy, A. and Panja, S. and De, S. (2019) Atomic flux distribution from a low-divergent dark wall oven. Review of Scientific Instruments, 90 (5). 053202-053208. ISSN 0034-6748

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Nearly collimated atomic beam is of interest for a variety of experiments. This article reports a simple way of modifying the atomic beam distribution using a dark wall oven and describes detailed study of outcoming atoms' spatial distribution. A simple design is obtained by employing the fact that inhomogeneous thermal distribution along a capillary results due to its partial resistive heating. Based on this phenomenon, we have designed a dark wall oven consisting of a reservoir, collimator, and cold absorber at the exit end of atoms, where all three are fabricated out of a single stainless steel capillary. The nearly collimated spatial distribution of the atoms resulting due to the absorber eliminating the atoms diverging above a certain angle is modeled and experimentally verified. A divergence as minimum as 1.2(1)degrees corresponding to a half angle theta(1/2) = 0.9(1)degrees is measured at an oven temperature of 250 degrees C that produces an atomic flux of about 8 x 10(9) atoms s(-1). Total flux as estimated using our measured spatial distribution of atoms matches well with the numerically simulated values of it for the dark wall oven.

Item Type: Article
Additional Information: Copyright for this article belongs to M/s American Institute of Physics.
Subjects: Instruments/ Instrumentation
Applied Physics/Condensed Matter
Depositing User: Mr. Yogesh Joshi
Date Deposited: 24 Jan 2020 11:39
Last Modified: 24 Jan 2020 11:39

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