In this work, we present a new and general method for measuring the astrophysical S-factor of nuc... more In this work, we present a new and general method for measuring the astrophysical S-factor of nuclear reactions in laser-induced plasmas and we apply it to d(d,n)^3He. The experiment was performed with the Texas Petawatt laser, which delivered 150-270 fs pulses of energy ranging from 90 to 180 J to D_2 or CD_4 molecular clusters. After removing the background noise, we used the measured time-of-flight data of energetic deuterium ions to obtain their energy distribution. We derive the S-factor using the measured energy distribution of the ions, the measured volume of the fusion plasma and the measured fusion yields. This method is model-independent in the sense that no assumption on the state of the system is required, but it requires an accurate measurement of the ion energy distribution especially at high energies and of the relevant fusion yields. In the d(d,n)^3He and ^3He(d,p)^4He cases discussed here, it is very important to apply the background subtraction for the energetic io...
ABSTRACT The interaction of intense ultrafast laser pulses with molecular clusters produces the e... more ABSTRACT The interaction of intense ultrafast laser pulses with molecular clusters produces the explosion of the clusters with enough kinetic energy to drive nuclear reactions. If we assume the thermalization of the plasma, the ratio of the yields from two different nuclear reactions occurring simultaneously will allow the determination of the ion temperature at the time when the reaction occurred. We performed two experiments: one using pure deuterium to drive the D(D,p)T and D(D,n)^3He reactions, another mixing D2 and ^3He into the gas jet target to allow us to measure simultaneously yields from the ^ 3He(D,p)^4He and the D-D reactions. We detected both the 2.45 MeV neutrons and 3.02 MeV protons from the D-D reactions and the 14.7 MeV protons from the ^3He(D,p)^4He reaction. Preliminary results will be shown.
M. Barbui,1 E. Aboud,1 S. Ahn,1 J. Bishop,1 V.Z. Goldberg,1 J. Hooker,1 C.H. Hunt,1 H. Jayatissa,... more M. Barbui,1 E. Aboud,1 S. Ahn,1 J. Bishop,1 V.Z. Goldberg,1 J. Hooker,1 C.H. Hunt,1 H. Jayatissa,1 Tz. Kokalova,2 E. Koshchiy,1 S. Pirrie,2 E. Pollacco,3 B.T. Roeder,1 A. Saastamoinen,1 S. Upadhiayula,1 C. Wheldon,2 and G.V. Rogachev1,4 1Cyclotron Institute, Texas A&M University, MS3366 College Station, Texas 77843 2School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom 3IRFU, CEA, Saclay, Gif-Sur-Ivette, France 4Department of Physics&Astronomy, Texas A&M University, College Station, Texas 77843
The European Isotope Separation On-Line facility (EURISOL) is set to be the „next-generation‟ Eur... more The European Isotope Separation On-Line facility (EURISOL) is set to be the „next-generation‟ European ISOL Radioactive Ion Beam (RIB) facility. It will extend and amplify current research on nuclear physics, nuclear astrophysics and fundamental interactions beyond the year 2010. In EURISOL, four target stations are foreseen, three direct targets of approximately 100 kW of beam power and one multi-MW liquid metal proton-toneutron converter, all driven by a high-power proton or light ion linear accelerator. In the multi-MW target assembly, high-intensity RIBs of neutron-rich isotopes will be obtained via induced fission reaction in several actinide targets surrounding a liquid metal spallation neutron source. This article summarises the work carried out within Task 2 of the EURISOL Design Study, with special attention to the coupled neutronics of the liquid converter and fission target (MAFF/PIAFE design like) and the overall performance of the facility, which will sustain fast neutr...
In this work, we present a new and general method for measuring the astrophysical S-factor of nuc... more In this work, we present a new and general method for measuring the astrophysical S-factor of nuclear reactions in laser-induced plasmas and we apply it to d(d,n)^3He. The experiment was performed with the Texas Petawatt laser, which delivered 150-270 fs pulses of energy ranging from 90 to 180 J to D_2 or CD_4 molecular clusters. After removing the background noise, we used the measured time-of-flight data of energetic deuterium ions to obtain their energy distribution. We derive the S-factor using the measured energy distribution of the ions, the measured volume of the fusion plasma and the measured fusion yields. This method is model-independent in the sense that no assumption on the state of the system is required, but it requires an accurate measurement of the ion energy distribution especially at high energies and of the relevant fusion yields. In the d(d,n)^3He and ^3He(d,p)^4He cases discussed here, it is very important to apply the background subtraction for the energetic io...
ABSTRACT The interaction of intense ultrafast laser pulses with molecular clusters produces the e... more ABSTRACT The interaction of intense ultrafast laser pulses with molecular clusters produces the explosion of the clusters with enough kinetic energy to drive nuclear reactions. If we assume the thermalization of the plasma, the ratio of the yields from two different nuclear reactions occurring simultaneously will allow the determination of the ion temperature at the time when the reaction occurred. We performed two experiments: one using pure deuterium to drive the D(D,p)T and D(D,n)^3He reactions, another mixing D2 and ^3He into the gas jet target to allow us to measure simultaneously yields from the ^ 3He(D,p)^4He and the D-D reactions. We detected both the 2.45 MeV neutrons and 3.02 MeV protons from the D-D reactions and the 14.7 MeV protons from the ^3He(D,p)^4He reaction. Preliminary results will be shown.
M. Barbui,1 E. Aboud,1 S. Ahn,1 J. Bishop,1 V.Z. Goldberg,1 J. Hooker,1 C.H. Hunt,1 H. Jayatissa,... more M. Barbui,1 E. Aboud,1 S. Ahn,1 J. Bishop,1 V.Z. Goldberg,1 J. Hooker,1 C.H. Hunt,1 H. Jayatissa,1 Tz. Kokalova,2 E. Koshchiy,1 S. Pirrie,2 E. Pollacco,3 B.T. Roeder,1 A. Saastamoinen,1 S. Upadhiayula,1 C. Wheldon,2 and G.V. Rogachev1,4 1Cyclotron Institute, Texas A&M University, MS3366 College Station, Texas 77843 2School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom 3IRFU, CEA, Saclay, Gif-Sur-Ivette, France 4Department of Physics&Astronomy, Texas A&M University, College Station, Texas 77843
The European Isotope Separation On-Line facility (EURISOL) is set to be the „next-generation‟ Eur... more The European Isotope Separation On-Line facility (EURISOL) is set to be the „next-generation‟ European ISOL Radioactive Ion Beam (RIB) facility. It will extend and amplify current research on nuclear physics, nuclear astrophysics and fundamental interactions beyond the year 2010. In EURISOL, four target stations are foreseen, three direct targets of approximately 100 kW of beam power and one multi-MW liquid metal proton-toneutron converter, all driven by a high-power proton or light ion linear accelerator. In the multi-MW target assembly, high-intensity RIBs of neutron-rich isotopes will be obtained via induced fission reaction in several actinide targets surrounding a liquid metal spallation neutron source. This article summarises the work carried out within Task 2 of the EURISOL Design Study, with special attention to the coupled neutronics of the liquid converter and fission target (MAFF/PIAFE design like) and the overall performance of the facility, which will sustain fast neutr...
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