Fast Neutron Imaging detector: A progress report
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Fast Neutron Imaging detector: A progress report Wenxin Wang 1,2 (David Attie 2 , Paul Colas 2 , Bitao Hu 1 , Lvxing An 1 , Yonghao Chen 1 , Xiaodong Wang 1 , Chunhui Zhang 1 , Xiaodong Zhang 1 ) 1. School of Nuclear Science and Technology, Lanzhou University, Lanzhou, CHINA 2. CEA/IRFU, Gif sur Yvette, Saclay, FRANCE 02/09/2011 1 8th RD51 collaboration meeting
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Fast Neutron Imaging detector: A progress report. Wenxin Wang 1,2 (David Attie 2 , Paul Colas 2 , Bitao Hu 1 , Lvxing An 1 , Yonghao Chen 1 , Xiaodong Wang 1 , Chunhui Zhang 1 , Xiaodong Zhang 1 ) 1. School of Nuclear Science and Technology , Lanzhou University , - PowerPoint PPT Presentation
Transcript of Fast Neutron Imaging detector: A progress report
8th RD51 collaboration meeting 1
Fast Neutron Imaging detector: A progress report
Wenxin Wang 1,2
(David Attie2, Paul Colas2, Bitao Hu1, Lvxing An1, Yonghao Chen1, Xiaodong Wang1, Chunhui Zhang1, Xiaodong Zhang1)
1. School of Nuclear Science and Technology, Lanzhou University,Lanzhou, CHINA
2. CEA/IRFU, Gif sur Yvette, Saclay, FRANCE
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8th RD51 collaboration meeting 2
Scheme of the FNI detector
(25µm)
10mm
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Aluminized polyethylene foil
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Structure of Fast Neutron Imaging(FNI) detector
Detector Sensitive area
Electronics: T2K electronics (AFTER chip : 1728channel )
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PCB was designed by Lanzhou University.The dimension of readout PCB: Total area: 365.5 mm X 306.0 mm Sensitive area(green area): 57.4 mm X 88.6 mm Pads Number: 1,728 (36X48) Pads Size: 1.75 mm X 1.50 mm
The Structure of PCB
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Cosmic-ray test in Saclay (March 2011)
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Experimental conditions (China, July 2011)
Gas mixture: Ar 95% + isobutane 5%Pressure: 1 atmNeutron: beam: 14Mev, 107 neutron/s (DT
coll.)
source: 241Am+Be -> n (1-2MeV)Tested samples:
Materials: 1.7 cm Pb
and paraffine
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Data taking in China last month
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Experimental equipment (using 241Am source)
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Not in the sensitive area
Material: 1.7 cm PbChink width: 1.5mm -> 5.0 mm step: 0.5 mm
Online Display (using 241Am source)
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Online Display (using 241Am source)
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hole radius 2.5mm
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Online Display (using 241Am source)
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Online Display (using 241Am source)
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Future planFor reducing background:Optimize the gas mixture (He-based)Decrease the thickness of gas wall and improve
side shieldingReduce the drift gap instead of extrapolating
proton track
Continue the data analysis to reconstruct images
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Thanks for your attention!
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