Double differential neutron yields from thick targets used in space applications

Natalie A. McGirl; Luis A. Castellanos; Ashwin P. Srikrishna; Lawrence H. Heilbronn; Chiara La Tessa; Adam Rusek; Michael Sivertz; Steve Blattnig; Martha Clowdsley; Tony Slaba; Cary Zeitlin

doi:10.1051/epjconf/201715304002

Double differential neutron yields from thick targets used in space applications

Natalie A. McGirl
, Luis A. Castellanos
, Ashwin P. Srikrishna
, Lawrence H. Heilbronn
, Chiara La Tessa
, Adam Rusek
, Michael Sivertz
, Steve Blattnig
, Martha Clowdsley
, Tony Slaba
, Cary Zeitlin

Research output: Contribution to journal › Conference article › peer-review

2 Scopus citations

Abstract

In March 2016, secondary neutron production from thick-target shielding experiments were conducted at the National Aeronautics and Space Administration's (NASA) Space Radiation Laboratory at Brookhaven National Laboratory. Ion beams of proton, helium, and iron projectiles were aimed at aluminum targets with areal densities of 20, 40, and 60 g/cm². The ion beams were extracted at energies of 400 and 800 AMeV and neutron yields were measured with liquid scintillators at 10°, 30°, 45°, 60°, 80°, and 135° off the beam axis. A second 60 g/cm² aluminum target was placed 3.5 m downstream from the middle of front target to study backscattered neutrons. Double differential thick-target neutron yields for various combinations of projectile, projectile energy, target material, target thickness, and detector location were produced using the time-of-flight technique. These measurements will help NASA perform uncertainty analyses on their transport codes and contribute to shielding design studies for future space applications.

Original language	English
Article number	04002
Journal	EPJ Web of Conferences
Volume	153
DOIs	https://doi.org/10.1051/epjconf/201715304002
State	Published - Sep 25 2017
Externally published	Yes
Event	13th International Conference on Radiation Shielding, ICRS 2016 and 19th Topical Meeting of the Radiation Protection and Shielding Division of the American Nuclear Society, RPSD 2016 - Paris, France Duration: Oct 3 2016 → Oct 6 2016

Funding

This work was supported by Grants NNX12AL51A and NNX15AD89A from the United States National Aeronautics and Space Administration. Special thanks to Matthew Beach, Ph.D. for his assistance with ROOT. Additional thanks to the team at Brookhaven National Laboratory for their extensive assistance with the setup and execution of the experiment.

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10.1051/epjconf/201715304002

Cite this

@article{413187f3bedc4feeac81b920f25141c6,

title = "Double differential neutron yields from thick targets used in space applications",

abstract = "In March 2016, secondary neutron production from thick-target shielding experiments were conducted at the National Aeronautics and Space Administration's (NASA) Space Radiation Laboratory at Brookhaven National Laboratory. Ion beams of proton, helium, and iron projectiles were aimed at aluminum targets with areal densities of 20, 40, and 60 g/cm2. The ion beams were extracted at energies of 400 and 800 AMeV and neutron yields were measured with liquid scintillators at 10°, 30°, 45°, 60°, 80°, and 135° off the beam axis. A second 60 g/cm2 aluminum target was placed 3.5 m downstream from the middle of front target to study backscattered neutrons. Double differential thick-target neutron yields for various combinations of projectile, projectile energy, target material, target thickness, and detector location were produced using the time-of-flight technique. These measurements will help NASA perform uncertainty analyses on their transport codes and contribute to shielding design studies for future space applications.",

author = "McGirl, \{Natalie A.\} and Castellanos, \{Luis A.\} and Srikrishna, \{Ashwin P.\} and Heilbronn, \{Lawrence H.\} and Tessa, \{Chiara La\} and Adam Rusek and Michael Sivertz and Steve Blattnig and Martha Clowdsley and Tony Slaba and Cary Zeitlin",

note = "Publisher Copyright: {\textcopyright} The Authors, published by EDP Sciences, 2017.; 13th International Conference on Radiation Shielding, ICRS 2016 and 19th Topical Meeting of the Radiation Protection and Shielding Division of the American Nuclear Society, RPSD 2016 ; Conference date: 03-10-2016 Through 06-10-2016",

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doi = "10.1051/epjconf/201715304002",

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T1 - Double differential neutron yields from thick targets used in space applications

AU - McGirl, Natalie A.

AU - Castellanos, Luis A.

AU - Srikrishna, Ashwin P.

AU - Heilbronn, Lawrence H.

AU - Tessa, Chiara La

AU - Rusek, Adam

AU - Sivertz, Michael

AU - Blattnig, Steve

AU - Clowdsley, Martha

AU - Slaba, Tony

AU - Zeitlin, Cary

PY - 2017/9/25

Y1 - 2017/9/25

N2 - In March 2016, secondary neutron production from thick-target shielding experiments were conducted at the National Aeronautics and Space Administration's (NASA) Space Radiation Laboratory at Brookhaven National Laboratory. Ion beams of proton, helium, and iron projectiles were aimed at aluminum targets with areal densities of 20, 40, and 60 g/cm2. The ion beams were extracted at energies of 400 and 800 AMeV and neutron yields were measured with liquid scintillators at 10°, 30°, 45°, 60°, 80°, and 135° off the beam axis. A second 60 g/cm2 aluminum target was placed 3.5 m downstream from the middle of front target to study backscattered neutrons. Double differential thick-target neutron yields for various combinations of projectile, projectile energy, target material, target thickness, and detector location were produced using the time-of-flight technique. These measurements will help NASA perform uncertainty analyses on their transport codes and contribute to shielding design studies for future space applications.

AB - In March 2016, secondary neutron production from thick-target shielding experiments were conducted at the National Aeronautics and Space Administration's (NASA) Space Radiation Laboratory at Brookhaven National Laboratory. Ion beams of proton, helium, and iron projectiles were aimed at aluminum targets with areal densities of 20, 40, and 60 g/cm2. The ion beams were extracted at energies of 400 and 800 AMeV and neutron yields were measured with liquid scintillators at 10°, 30°, 45°, 60°, 80°, and 135° off the beam axis. A second 60 g/cm2 aluminum target was placed 3.5 m downstream from the middle of front target to study backscattered neutrons. Double differential thick-target neutron yields for various combinations of projectile, projectile energy, target material, target thickness, and detector location were produced using the time-of-flight technique. These measurements will help NASA perform uncertainty analyses on their transport codes and contribute to shielding design studies for future space applications.

UR - https://www.scopus.com/pages/publications/85041967019

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DO - 10.1051/epjconf/201715304002

M3 - Conference article

AN - SCOPUS:85041967019

SN - 2101-6275

VL - 153

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 04002

T2 - 13th International Conference on Radiation Shielding, ICRS 2016 and 19th Topical Meeting of the Radiation Protection and Shielding Division of the American Nuclear Society, RPSD 2016

Y2 - 3 October 2016 through 6 October 2016

ER -

Double differential neutron yields from thick targets used in space applications

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