Physical design of conversion screens for thermal neutron transmission imaging

Xingyu LIU; Xiaoxue YU; Hangzhou LI; Jinqiu PENG; Xu YANG; Kang WU; Xiaohou BAI; Junrun WANG; Zhiyong DENG; Lu WU; Gentao GAO; Guorong WAN; Li LIU; Peng HE; Yun ZHANG; Yu ZHANG; Zeen YAO; Zheng WEI

doi:10.11889/j.0253-3219.2023.hjs.46.110203

Journals >NUCLEAR TECHNIQUES >Volume 46 >Issue 11 >Page 110203 > Article

NUCLEAR TECHNIQUES
Vol. 46, Issue 11, 110203 (2023)

Physical design of conversion screens for thermal neutron transmission imaging

Xingyu LIU¹, Xiaoxue YU¹, Hangzhou LI¹, Jinqiu PENG¹..., Xu YANG¹, Kang WU¹, Xiaohou BAI¹, Junrun WANG^1,2, Zhiyong DENG^1,3, Lu WU³, Gentao GAO³, Guorong WAN³, Li LIU³, Peng HE³, Yun ZHANG³, Yu ZHANG^1,2, Zeen YAO^1,2 and Zheng WEI^1,2,*|Show fewer author(s)

Author Affiliations

¹School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China

²Engineering Research Center for Neutron Application, Ministry of Education, Lanzhou University, Lanzhou 730000, China

³Nuclear Power Institute of China, Chengdu 610213, China

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DOI: 10.11889/j.0253-3219.2023.hjs.46.110203 Cite this Article

Xingyu LIU, Xiaoxue YU, Hangzhou LI, Jinqiu PENG, Xu YANG, Kang WU, Xiaohou BAI, Junrun WANG, Zhiyong DENG, Lu WU, Gentao GAO, Guorong WAN, Li LIU, Peng HE, Yun ZHANG, Yu ZHANG, Zeen YAO, Zheng WEI. Physical design of conversion screens for thermal neutron transmission imaging[J]. NUCLEAR TECHNIQUES, 2023, 46(11): 110203 Copy Citation Text

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Fig. 1. Structure diagram of thermal neutron transmission imaging system

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Fig. 2. Diagram of Siemens star indicator model for thermal neutron imaging

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Fig. 3. Thermal neutron radiograph of Siemens star indicator with 40 µm thick LiF(ZnS) conversion screen (color online)

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Fig. 4. Radial distribution and ESF of converted photon count

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Fig. 5. Thermal neutron radiograph of Siemens star indicator and LSF at the edge of the fourth ring slit (LiF(ZnS) conversion screen)

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Fig. 6. Spatial resolution distribution of thermal neutron radiograph based on the LiF(ZnS) and LiF(GOS) image conversion screens

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Fig. 7. Neutron-photon conversion efficiency distribution based on the LiF(ZnS) and LiF(GOS) image conversion screens

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像转换屏厚度 Thickness of image conversion screen / μm		空间分辨率 Spatial resolution / μm
像转换屏厚度 Thickness of image conversion screen / μm		狭缝1 Slit1	狭缝2 Slit2	狭缝3 Slit3	狭缝4 Slit4	狭缝5 Slit5	狭缝6 Slit6	平均 Average
5	(L)	35.31	37.35	35.12	35.51	35.07	36.66	35.67
	(R)	35.37	35.46	35.47	36.71	34.85	35.21
10	(L)	42.28	39.84	32.14	35.54	33.03	34.49	37.88
	(R)	40.36	34.31	45.74	41.35	41.29	34.22
20	(L)	37.04	43.27	38.72	37.26	37.91	37.16	39.04
	(R)	46.69	37.37	36.69	39.27	38.73	38.37
30	(L)	36.74	42.25	49.77	42.69	43.84	45.06	42.92
	(R)	44.20	42.74	42.28	41.10	41.39	42.93
40	(L)	47.53	47.90	46.69	43.46	47.04	47.39	47.01
	(R)	48.73	47.77	46.89	45.50	48.99	46.18
50	(L)	49.97	54.83	51.77	50.04	50.19	50.47	51.10
	(R)	49.12	56.05	50.36	47.01	51.34	52.00
60	(L)	56.78	57.08	51.67	53.48	58.44	58.58	55.19
	(R)	56.69	51.33	53.94	51.21	54.42	58.60
70	(L)	56.63	55.05	58.25	57.53	59.39	60.25	59.64
	(R)	56.01	60.79	60.88	65.64	58.93	66.27
80	(L)	51.55	68.48	62.94	62.55	65.69	66.22	63.19
	(R)	48.12	60.65	65.16	70.80	64.76	71.38
90	(L)	59.73	67.98	62.17	70.90	66.11	77.56	68.80
	(R)	69.83	66.84	65.64	72.77	73.42	72.67
100	(L)	57.43	83.27	84.22	71.82	82.32	79.55	72.91
	(R)	58.66	67.22	66.72	68.82	78.68	76.26

Table 1. Spatial resolution of thermal neutron radiograph based on the LiF(ZnS) image conversion screen

像转换屏厚度 Thickness of image conversion screen / μm		空间分辨率 Spatial resolution / μm
像转换屏厚度 Thickness of image conversion screen / μm		狭缝1 Slit1	狭缝2 Slit2	狭缝3 Slit3	狭缝4 Slit4	狭缝5 Slit5	狭缝6 Slit6	平均 Average
5	(L)	38.81	37.75	40.06	36.79	33.76	29.34	35.09
	(R)	30.96	27.01	37.15	35.27	41.56	32.56
10	(L)	39.21	39.84	30.89	35.95	37.13	41.99	37.22
	(R)	42.32	32.35	32.69	38.12	37.16	38.99
20	(L)	33.65	36.72	33.97	45.21	40.11	39.58	38.65
	(R)	40.50	37.22	37.52	40.58	40.55	38.21
30	(L)	35.21	50.86	44.04	38.49	42.05	44.30	42.45
	(R)	39.32	49.78	39.57	41.03	41.29	43.40
40	(L)	41.93	44.97	46.91	47.85	48.56	46.54	46.34
	(R)	41.65	48.19	44.76	53.43	46.08	45.18
50	(L)	38.66	55.28	54.35	43.36	52.04	50.91	50.46
	(R)	61.64	52.10	46.92	51.60	48.91	49.75
60	(L)	53.30	53.99	55.46	52.63	57.63	55.55	54.07
	(R)	53.17	55.29	51.93	53.16	54.39	52.31
70	(L)	62.38	58.89	53.01	56.66	56.99	64.65	58.57
	(R)	55.87	57.54	57.23	58.02	60.04	61.51
80	(L)	59.51	58.77	61.87	63.60	59.86	59.23	62.20
	(R)	68.96	62.10	59.46	65.48	64.46	63.05
90	(L)	59.24	72.71	73.08	68.96	63.00	68.35	66.31
	(R)	68.55	60.24	58.45	71.39	67.25	64.50
100	(L)	65.83	68.92	74.52	69.18	69.34	72.62	70.15
	(R)	68.14	72.35	69.35	69.74	70.87	70.96

Table 2. Spatial resolution of thermal neutron radiograph based on the LiF(GOS) image conversion screen

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