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

Title: Preparation of ortho-para ratio controlled D{sub 2} gas for muon-catalyzed fusion

Abstract

A negative muon in hydrogen targets, e.g., D{sub 2} or D-T mixture, can catalyze nuclear fusions following a series of atomic processes involving muonic hydrogen molecular formation (muon-catalyzed fusion, {mu}CF). The ortho-para state of D{sub 2} is a crucial parameter not only for enhancing the fusion rate but also to precisely investigate various muonic atom processes. We have developed a system for controlling and measuring the ortho-para ratio of D{sub 2} gas for {mu}CF experiments. We successfully collected para-enriched D{sub 2} without using liquid-hydrogen coolant. Ortho-enriched D{sub 2} was also obtained by using a catalytic conversion method with a mixture of chromium oxide and alumina. The ortho-para ratio of D{sub 2} gas was measured with a compact Raman spectroscopy system. We produced large volume (5-30 l at STP), high-purity (less than ppm high-Z contaminant) D{sub 2} targets with a wide range of ortho-para ratios (ortho 20%-99%). By using the ortho-para controlled D{sub 2} in {mu}CF experiments, we observed the dependence of {mu}CF phenomena on the ortho-para ratio.

Authors:
 [1]; ; ; ;  [2]; ;  [3];  [4];  [1];  [5];  [6]
  1. Atomic Physics Laboratory, Discovery Research Institute, RIKEN, Wako, Saitama 351-0198 (Japan)
  2. Advanced Meson Science Laboratory, RIKEN Nishina Center, RIKEN, Wako, Saitama 351-0198 (Japan)
  3. Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 (Japan)
  4. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 (Japan)
  5. (Japan)
  6. (United States)
Publication Date:
OSTI Identifier:
21123922
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 79; Journal Issue: 5; Other Information: DOI: 10.1063/1.2918538; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ALUMINIUM OXIDES; CHROMIUM OXIDES; COOLANTS; DEUTERIUM; HYDROGEN; MIXTURES; MUON-CATALYZED FUSION; MUONIC ATOMS; MUONS; RAMAN SPECTROSCOPY

Citation Formats

Imao, H., Ishida, K., Matsuzaki, T., Matsuda, Y., Iwasaki, M., Kawamura, N., Strasser, P., Toyoda, A., Nagamine, K., Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, and Physics Department, University of California Riverside, Riverside, California 92521. Preparation of ortho-para ratio controlled D{sub 2} gas for muon-catalyzed fusion. United States: N. p., 2008. Web. doi:10.1063/1.2918538.
Imao, H., Ishida, K., Matsuzaki, T., Matsuda, Y., Iwasaki, M., Kawamura, N., Strasser, P., Toyoda, A., Nagamine, K., Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, & Physics Department, University of California Riverside, Riverside, California 92521. Preparation of ortho-para ratio controlled D{sub 2} gas for muon-catalyzed fusion. United States. doi:10.1063/1.2918538.
Imao, H., Ishida, K., Matsuzaki, T., Matsuda, Y., Iwasaki, M., Kawamura, N., Strasser, P., Toyoda, A., Nagamine, K., Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801, and Physics Department, University of California Riverside, Riverside, California 92521. Thu . "Preparation of ortho-para ratio controlled D{sub 2} gas for muon-catalyzed fusion". United States. doi:10.1063/1.2918538.
@article{osti_21123922,
title = {Preparation of ortho-para ratio controlled D{sub 2} gas for muon-catalyzed fusion},
author = {Imao, H. and Ishida, K. and Matsuzaki, T. and Matsuda, Y. and Iwasaki, M. and Kawamura, N. and Strasser, P. and Toyoda, A. and Nagamine, K. and Muon Science Laboratory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, Ibaraki 305-0801 and Physics Department, University of California Riverside, Riverside, California 92521},
abstractNote = {A negative muon in hydrogen targets, e.g., D{sub 2} or D-T mixture, can catalyze nuclear fusions following a series of atomic processes involving muonic hydrogen molecular formation (muon-catalyzed fusion, {mu}CF). The ortho-para state of D{sub 2} is a crucial parameter not only for enhancing the fusion rate but also to precisely investigate various muonic atom processes. We have developed a system for controlling and measuring the ortho-para ratio of D{sub 2} gas for {mu}CF experiments. We successfully collected para-enriched D{sub 2} without using liquid-hydrogen coolant. Ortho-enriched D{sub 2} was also obtained by using a catalytic conversion method with a mixture of chromium oxide and alumina. The ortho-para ratio of D{sub 2} gas was measured with a compact Raman spectroscopy system. We produced large volume (5-30 l at STP), high-purity (less than ppm high-Z contaminant) D{sub 2} targets with a wide range of ortho-para ratios (ortho 20%-99%). By using the ortho-para controlled D{sub 2} in {mu}CF experiments, we observed the dependence of {mu}CF phenomena on the ortho-para ratio.},
doi = {10.1063/1.2918538},
journal = {Review of Scientific Instruments},
number = 5,
volume = 79,
place = {United States},
year = {Thu May 15 00:00:00 EDT 2008},
month = {Thu May 15 00:00:00 EDT 2008}
}