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TY - UNPB AU - Isaev, A.A. AU - Kozlovskiy, K.I. AU - Shikanov, A.E. AU - Stepanov, D.S. AU - Vovchenko, E.D. ED - Kuzin, Maksim V. ED - Schaa, Volker RW TI - Experimental Studies of Neutron Generation by the Laser Plasma Acceleration Method in a Nonstationary Magnetic Field J2 - Proc. of RUPAC2018, Protvino, Russia, 01-05 October 2018 C1 - Protvino, Russia T2 - Russian Particle Accelerator Conference T3 - 26 LA - english AB - The experimental results of deuteron acceleration based on the expansion of a quasineutral laser plasma in a strong nonstationary magnetic field for the generation of neutrons are discussed, which became a logical continuation of a series of previous works. To obtain a laser plasma, an Nd: YAG laser (wavelength 1.06 nm) was used with the impulse power of 0.85 J and duration of 10 nsec. During its radiation focusing at a dielectric target made of deuterated polyethylene (CD2)n in a vacuum of ~ 10⁻⁴ torr, the power density of about 5×10¹⁵ W×m⁻² was reached. A rapidly growing magnetic field was created when the voltage generator was discharged, based on the pulse charging of the storage capacitance from the high-voltage pulse transformer. When the voltage 100 kV is reached, a breakdown of the spark gap and a discharge of the capacitance onto the induction coil generating a magnetic field (maximum current of the order of 10 kA) occurs. The ion speed was determined as per the time-of-flight method with the registration of ion current at a collector made as a Faraday cylinder, which is installed at a distance of 0.5 m from the laser target. The rapidly increasing magnetic field reached 10⁸ T/s, the maximum ion flow rate was 3×10⁸ cm/s. When a beam of accelerated deuterons was directed to a closely spaced deuterium-containing target, an output of 10⁴ neutrons/pulse was reached. PB - JACoW Publishing CP - Geneva, Switzerland ER -