Z-pinch experiments with a hybrid configuration of a deuterium gas puff have been carried out on theHAWK(NRL,Washington,DC)and GIT-12(IHCE,Tomsk)pulsed power generators at 0.7 MA and 3MA currents,respectively.On GIT-1...Z-pinch experiments with a hybrid configuration of a deuterium gas puff have been carried out on theHAWK(NRL,Washington,DC)and GIT-12(IHCE,Tomsk)pulsed power generators at 0.7 MA and 3MA currents,respectively.On GIT-12,neutron yields reached an average value of 231012 neutrons,and deuterons were accelerated up to an energy of 30 MeV.This was 50 times the ion energy provided by the generator driving voltage of 0.6 MV and the highest energy observed in z-pinches and dense plasma foci.To confirm these unique results independently on another device,we performed several experimental campaigns on theHAWKgenerator.Comparison of the experiments onGIT-12 andHAWKhelped us to understand which parameters are essential for optimized neutron production.Since theHAWKgenerator is of a similar pulsed power architecture as GIT-12,the experiments on GIT-12 and HAWK are important for the study of how charged-particle acceleration scales with the current.展开更多
The laser system PALS,as a driver of a broad-beam ion source,delivered deuterons which generated neutrons with energies higher than 14 Me V through the 7Li(d,n)8 Be reaction.Deuterons with sub-Me V energy were acceler...The laser system PALS,as a driver of a broad-beam ion source,delivered deuterons which generated neutrons with energies higher than 14 Me V through the 7Li(d,n)8 Be reaction.Deuterons with sub-Me V energy were accelerated from the front surface of a massive CD2 target in the backward direction with respect to the laser beam vector.Simultaneously,neutrons were emitted from the primary CD2 target and a secondary Li F catcher.The total maximum measured neutron yield from 2D(d,n)3He,7Li(d,n)8Be,12C(d,n)13N reactions was ～3.5(±0.5) × 108 neutrons/shot.展开更多
基金The authors are grateful toA.Yu.Labetsky and B.J.Sobocinski for their help with the experiments on GIT-12 and HAWK,respectively.This research has been supported by the Grant Agency of the Czech Republic(Grant No.19-02545S)the Czech Ministry of Education(Grant Nos.LTT17015,LTAUSA17084,and CZ.02.1.01/0.0/0.0/16_019/0000778)+1 种基金the Czech Technical University in Prague(Grant No.SGS19/167/OHK3/3T/13)the Naval Research Laboratory Base Program,and a TPU Competitiveness Enhancement Program grant.
文摘Z-pinch experiments with a hybrid configuration of a deuterium gas puff have been carried out on theHAWK(NRL,Washington,DC)and GIT-12(IHCE,Tomsk)pulsed power generators at 0.7 MA and 3MA currents,respectively.On GIT-12,neutron yields reached an average value of 231012 neutrons,and deuterons were accelerated up to an energy of 30 MeV.This was 50 times the ion energy provided by the generator driving voltage of 0.6 MV and the highest energy observed in z-pinches and dense plasma foci.To confirm these unique results independently on another device,we performed several experimental campaigns on theHAWKgenerator.Comparison of the experiments onGIT-12 andHAWKhelped us to understand which parameters are essential for optimized neutron production.Since theHAWKgenerator is of a similar pulsed power architecture as GIT-12,the experiments on GIT-12 and HAWK are important for the study of how charged-particle acceleration scales with the current.
基金funding from the Czech Science Foundation (Grant No.P205/12/0454)the Czech Republic’s Ministry of Education,Youth and Sports (Project No.LM2010014)+2 种基金LASERLAB-EUROPE (grant agreement no 284464,EC’s Seventh Framework Programme)the European Social Fundstate budget of the Czech Republic (Project No.CZ.1.07/2.3.00/20.0279)
文摘The laser system PALS,as a driver of a broad-beam ion source,delivered deuterons which generated neutrons with energies higher than 14 Me V through the 7Li(d,n)8 Be reaction.Deuterons with sub-Me V energy were accelerated from the front surface of a massive CD2 target in the backward direction with respect to the laser beam vector.Simultaneously,neutrons were emitted from the primary CD2 target and a secondary Li F catcher.The total maximum measured neutron yield from 2D(d,n)3He,7Li(d,n)8Be,12C(d,n)13N reactions was ～3.5(±0.5) × 108 neutrons/shot.
