skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of the density profile of pure and seeded molecular beams by femtosecond ion imaging

Abstract

Here, we report on femtosecond ion imaging experiments to measure the density profile of a pulsed supersonic molecular beam. Ion images are measured for both a molecular beam and bulk gas under identical experimental conditions via femtosecond multiphoton ionization of Xe atoms. We report the density profile of the molecular beam, and the measured absolute density is compared with theoretical calculations of the centre line beam density. Subsequently, we discuss reasons accounting for the differences between measurements and calculations and propose that strong skimmer interference is the most probable cause for the differences. Furthermore, we report on experiments measuring the centre line density of seeded supersonic beams. The femtosecond ion images show that seeding the heavy Xe atom at low relative seed fractions (1%-10%) in a light carrier gas like Ne results in strong relative enhancements of up to two orders of magnitude.

Authors:
 [1];  [2];  [1]
  1. LaserLaB Amsterdam, VU University Amsterdam, de Boelelaan 1083, 1081 HV Amsterdam (Netherlands)
  2. (China)
Publication Date:
OSTI Identifier:
22392351
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 86; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CARRIERS; IMAGES; INTERFERENCE; IONS; MOLECULAR BEAMS; PHOTOIONIZATION; PULSES

Citation Formats

Meng, Congsen, Department of Physics, National University of Defense Technology, Changsha 410073, and Janssen, Maurice H. M. Measurement of the density profile of pure and seeded molecular beams by femtosecond ion imaging. United States: N. p., 2015. Web. doi:10.1063/1.4913251.
Meng, Congsen, Department of Physics, National University of Defense Technology, Changsha 410073, & Janssen, Maurice H. M. Measurement of the density profile of pure and seeded molecular beams by femtosecond ion imaging. United States. doi:10.1063/1.4913251.
Meng, Congsen, Department of Physics, National University of Defense Technology, Changsha 410073, and Janssen, Maurice H. M. Sun . "Measurement of the density profile of pure and seeded molecular beams by femtosecond ion imaging". United States. doi:10.1063/1.4913251.
@article{osti_22392351,
title = {Measurement of the density profile of pure and seeded molecular beams by femtosecond ion imaging},
author = {Meng, Congsen and Department of Physics, National University of Defense Technology, Changsha 410073 and Janssen, Maurice H. M.},
abstractNote = {Here, we report on femtosecond ion imaging experiments to measure the density profile of a pulsed supersonic molecular beam. Ion images are measured for both a molecular beam and bulk gas under identical experimental conditions via femtosecond multiphoton ionization of Xe atoms. We report the density profile of the molecular beam, and the measured absolute density is compared with theoretical calculations of the centre line beam density. Subsequently, we discuss reasons accounting for the differences between measurements and calculations and propose that strong skimmer interference is the most probable cause for the differences. Furthermore, we report on experiments measuring the centre line density of seeded supersonic beams. The femtosecond ion images show that seeding the heavy Xe atom at low relative seed fractions (1%-10%) in a light carrier gas like Ne results in strong relative enhancements of up to two orders of magnitude.},
doi = {10.1063/1.4913251},
journal = {Review of Scientific Instruments},
number = 2,
volume = 86,
place = {United States},
year = {Sun Feb 15 00:00:00 EST 2015},
month = {Sun Feb 15 00:00:00 EST 2015}
}