My past work Simulation work v Simulation of

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My past work

My past work

Simulation work : v Simulation of the spatial resolution when a neutron flies into

Simulation work : v Simulation of the spatial resolution when a neutron flies into the detector; v Changes of the spatial resolution of detector under the different flux of neutron; v Influences of high gamma background on the spatial resolution.

The published results: Converter material: Li-6、B-10 (0. 5μm) The typical conversion reactions: H(n, n)p

The published results: Converter material: Li-6、B-10 (0. 5μm) The typical conversion reactions: H(n, n)p n→ 10 B(n, α)7 Li 6 Li(n, α)t α t p Andrew C , et al, Nucl. Instr. Meth A. 2004, Vol. 521: 441

Our work: Converter material: CH 2 （40 μm） The typical conversion reactions: H(n, n)p

Our work: Converter material: CH 2 （40 μm） The typical conversion reactions: H(n, n)p n p

Monte-Carlo simulation Garfield The ionization of charged particle in drift gap The transportation of

Monte-Carlo simulation Garfield The ionization of charged particle in drift gap The transportation of electron in gas Ø Average ionization energy Ø Energy loss Ø Drifting velocity Ø Diffusion coefficient Ø Multiplication coefficient Transportation function Geant 4 The incident 14 Me. V neutron flux The charged particle (proton) in converter The initial electron The induced signal

The program structure of Micromegas Detector construction Sensitive detector Collect secondary particle hits Particle

The program structure of Micromegas Detector construction Sensitive detector Collect secondary particle hits Particle generator action Physics list Storing results in histogram Manager and Analysis results

The time information of the track

The time information of the track

Simulation result: Common method (neutron flux: 1× 1010 n/s): n/s 834 m Delay method

Simulation result: Common method (neutron flux: 1× 1010 n/s): n/s 834 m Delay method (neutron flux: 1× 1010 n/s): n/s 86 m

Simulation result: The spatial resolution variation in the different primary neutron flux. (d 1)

Simulation result: The spatial resolution variation in the different primary neutron flux. (d 1) common method; (d 2) delay method.

-rays spectrum : The -rays spectrum induced by 14 Mev neutrons Houry M,

-rays spectrum : The -rays spectrum induced by 14 Mev neutrons Houry M, et al, Nucl. Instr. Meth A. 2006, Vol. 557: 648

Simulation result: The influence of high γ background on the spatial resolution, resolution when

Simulation result: The influence of high γ background on the spatial resolution, resolution when the flux of 14 Me. V neutron is 1× 1010 n/s. (d 1) common method; (d 2) delay method.

Simulation by Garfield &CELL &GAS &FIELD &DRIFT

Simulation by Garfield &CELL &GAS &FIELD &DRIFT

Simulation by Garfield The detector’s gain in various gas mixtures as a function of

Simulation by Garfield The detector’s gain in various gas mixtures as a function of mesh voltage.

Simulation by Garfield The detector’s spatial resolution in various gas mixtures as a function

Simulation by Garfield The detector’s spatial resolution in various gas mixtures as a function of the mesh voltage.

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