title: Design of the radiation shielding for the time of flight enhanced diagnostics neutron spectrometer at Experimental Advanced Superconducting Tokamak.
abstract: A radiation shielding has been designed to reduce scattered neutrons and background gamma-rays for the new double-ring Time Of Flight Enhanced Diagnostics (TOFED). The shielding was designed based on simulation with the Monte Carlo code MCNP5. Dedicated model of the EAST tokamak has been developed together with the emission neutron source profile and spectrum; the latter were simulated with the Nubeam and GENESIS codes. Significant reduction of background radiation at the detector can be achieved and this satisfies the requirement of TOFED. The intensities of the scattered and direct neutrons in the line of sight of the TOFED neutron spectrometer at EAST are studied for future data interpretation.
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: T F
authors.initials: TF
authors.lastname: Du
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: Z J
authors.initials: ZJ
authors.lastname: Chen
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: X Y
authors.initials: XY
authors.lastname: Peng
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: X
authors.initials: X
authors.lastname: Yuan
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: X
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Dipartimento di Fisica, Università di Milano-Bicocca, Milano, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Gorini
authors.affiliation: Dipartimento di Fisica, Università di Milano-Bicocca, Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Nocente
authors.affiliation: Istituto di Fisicadel Plasma "P. Caldirola," Milano, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Tardocchi
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Hu
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Cui
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: X F
authors.initials: XF
authors.lastname: Xie
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: L J
authors.initials: LJ
authors.lastname: Ge
authors.affiliation: Institute of Plasma Physics, CAS, Hefei, China.
authors.forename: L Q
authors.initials: LQ
authors.lastname: Hu
authors.affiliation: Institute of Plasma Physics, CAS, Hefei, China.
authors.forename: G Q
authors.initials: GQ
authors.lastname: Zhong
authors.affiliation: Institute of Plasma Physics, CAS, Hefei, China.
authors.forename: S Y
authors.initials: SY
authors.lastname: Lin
authors.affiliation: Institute of Plasma Physics, CAS, Hefei, China.
authors.forename: B N
authors.initials: BN
authors.lastname: Wan
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: X Q
authors.initials: XQ
authors.lastname: Li
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: G H
authors.initials: GH
authors.lastname: Zhang
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: J X
authors.initials: JX
authors.lastname: Chen
authors.affiliation: School of Physics, State Key Lab of Nuclear Physics and Technology, Peking University, Beijing, China.
authors.forename: T S
authors.initials: TS
authors.lastname: Fan