Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - Comparison of bulk and pitcher-catcher targets for laser-driven neutron production
AU - Willingale, L.
AU - Petrov, G. M.
AU - Maksimchuk, A.
AU - Davis, J.
AU - Freeman, R. R.
AU - Joglekar, A. S.
AU - Matsuoka, T.
AU - Murphy, C. D.
AU - Ovchinnikov, V. M.
AU - Thomas, A. G. R.
AU - Van Woerkom, L.
AU - Krushelnick, K.
PY - 2011/8
Y1 - 2011/8
N2 - Laser-driven d(d, n)-He-3 beam-target fusion neutron production from bulk deuterated plastic (CD) targets is compared with a pitcher-catcher target scheme using an identical laser and detector arrangement. For laser intensities in the range of (1-3) x 10(19) W cm(-2), it was found that the bulk targets produced a high yield (5 x 10(4) neutrons per steradian) beamed preferentially in the laser propagation direction. Numerical modeling shows the importance of considering the temperature adjusted stopping powers to correctly model the neutron production. The bulk CD targets have a high background target temperature leading to a reduced stopping power for the deuterons, which increases the probability of generating neutrons by fusion. Neutron production from the pitcher-catcher targets was not as efficient since it does not benefit from the reduced stopping power in the cold catcher target. Also, the inhibition of the deuteron acceleration by a proton rich contamination layer significantly reduces the pitcher-catcher neutron production. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3624769]
AB - Laser-driven d(d, n)-He-3 beam-target fusion neutron production from bulk deuterated plastic (CD) targets is compared with a pitcher-catcher target scheme using an identical laser and detector arrangement. For laser intensities in the range of (1-3) x 10(19) W cm(-2), it was found that the bulk targets produced a high yield (5 x 10(4) neutrons per steradian) beamed preferentially in the laser propagation direction. Numerical modeling shows the importance of considering the temperature adjusted stopping powers to correctly model the neutron production. The bulk CD targets have a high background target temperature leading to a reduced stopping power for the deuterons, which increases the probability of generating neutrons by fusion. Neutron production from the pitcher-catcher targets was not as efficient since it does not benefit from the reduced stopping power in the cold catcher target. Also, the inhibition of the deuteron acceleration by a proton rich contamination layer significantly reduces the pitcher-catcher neutron production. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3624769]
KW - HIGH-INTENSITY LASER
KW - NUCLEAR-FUSION
KW - ION-BEAMS
KW - TRANSPORT
KW - PLASMA
KW - DEUTERIUM
KW - EMISSION
KW - ELECTRON
KW - PULSES
U2 - 10.1063/1.3624769
DO - 10.1063/1.3624769
M3 - Journal article
VL - 18
JO - Physics of Plasmas
JF - Physics of Plasmas
SN - 1070-664X
IS - 8
M1 - 083106
ER -