An improved method of unfolding neutron TOF spectrum for low ion temperature inertial confinement fusion

SONG Zi-Feng; TANG Qi; LIU Zhong-Jie; ZHAN Xia-Yu; CHEN Jia-Bin

doi:10.1088/1674-1137/38/6/066201

Chinese Physics C> 2014, Vol. 38> Issue(6) : 066201 DOI: 10.1088/1674-1137/38/6/066201

An improved method of unfolding neutron TOF spectrum for low ion temperature inertial confinement fusion

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Abstract：
The fuel ion temperature in inertial confinement fusion can be determined from the neutron energy spectrum. For the implosion experiment with low neutron yield, and thus low signal-to-noise ratio, a new technique to unfold the neutron energy spectrum from the observed neutron time-of-flight signal is presented in this paper. This method uses a low-pass filter to remove noise from the signal with a threshold value determined by power spectrum analysis. This technique has been applied to the analysis of the observed neutron time-of-flight signals in the indirect drive implosion experiment conducted on Shenguang Ⅲ prototype laser facility, and fuel ion temperatures of about 1.0 keV are obtained.

References

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Murphy T J, Chrien R E, Klare K A. Rev. Sci. Instrum., 1997, 68(1): 610-613[2] Chen J B, Zheng Z J, Peng H S et al. Rev. Sci. Instrum., 2001, 72(9): 3534-3536[3] Murphy T J, Lerche R A, Bennett C et al. Rev. Sci. Instrum., 1995, 66(1): 930-932[4] Russotto M A, Kremens R L. Rev. Sci. Instrum., 1990, 61(10): 3125-3127[5] CHEN J B, ZHENG Z J, PENG H S et al. Nucl. Instrum. Methods A, 2002, 491: 474-477[6] Remington B A, Lerche R A, Cable M D. Rev. Sci. Instrum., 1990, 61(10): 3128-3130[7] Murphy T J, Lerche R A. Rev. Sci. Instrum., 1992, 63(10): 4883-4885[8] Lerche R A, Remington B A. Rev. Sci. Instrum., 1990, 61(10): 3131-3133

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SONG Zi-Feng, TANG Qi, LIU Zhong-Jie, ZHAN Xia-Yu and CHEN Jia-Bin. An improved method of unfolding neutron TOF spectrum for low ion temperature inertial confinement fusion[J]. Chinese Physics C, 2014, 38(6): 066201. doi: 10.1088/1674-1137/38/6/066201

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Received: 2013-07-04
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

An improved method of unfolding neutron TOF spectrum for low ion temperature inertial confinement fusion

Corresponding author: CHEN Jia-Bin,

Received Date: 2013-07-04
Accepted Date: 1900-01-01
Available Online: 2014-06-05

Abstract: The fuel ion temperature in inertial confinement fusion can be determined from the neutron energy spectrum. For the implosion experiment with low neutron yield, and thus low signal-to-noise ratio, a new technique to unfold the neutron energy spectrum from the observed neutron time-of-flight signal is presented in this paper. This method uses a low-pass filter to remove noise from the signal with a threshold value determined by power spectrum analysis. This technique has been applied to the analysis of the observed neutron time-of-flight signals in the indirect drive implosion experiment conducted on Shenguang Ⅲ prototype laser facility, and fuel ion temperatures of about 1.0 keV are obtained.