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

PDF - Published Version Restricted to Registered users only Download (1476Kb) | Request a copy

Abstract

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
Divisions:	UNSPECIFIED
Depositing User:	Mr. Yogesh Joshi
Date Deposited:	24 Jan 2020 11:39
Last Modified:	24 Jan 2020 11:39
URI:	http://npl.csircentral.net/id/eprint/4113

Actions (login required)

View Item