Creation of cold nitric oxide by extraction of the cold fraction of a thermal distribution
Abstract
We describe a device using the Stark effect to extract the cold fraction of nitric oxide molecules from a warmer thermal distribution. Room temperature NO is cryogenically cooled to 72-82 K and injected into a straight, hexapole guide that uses the Stark effect. By blocking line-of-sight trajectories from the input to the output, primarily the slowest molecules are guided around the obstruction and are transferred into a new chamber. We measure the temperature distribution using a field-stabilized Rydberg time-of-flight technique. A superposition of molecular Rydberg states is excited, sufficiently increasing the lifetime of the excited state for a time-of-flight measurement for cold molecular samples. We produce a continuous source of nitric oxide with temperatures ranging from 7 to 20 K in the lowest ro-vibrational state. The output temperature is controlled by the initial temperature distribution and the guide voltage.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Oct 01, 2015
- Source ID
- 10.1063/1.4931756
Entities
People
- Bryan Bichsel
- E. R. I. Abraham
- Jason Alexander
- Michael A. Morrison
- Neil E. Shafer-ray
- Parshuram Dahal
Organizations
- Office of Naval Research
- University of Oklahoma