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At least 307 records · Page 17
All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on TbFeAsO by Materials Project

TbOFeAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Tb3+ is bonded in a 4-coordinate geometry to four equivalent As3- and four equivalent O2- atoms. All Tb–As bond lengths are 3.31 Å. All Tb–O bond lengths are 2.27 Å. Fe2+ is bonded to four equivalent As3- atoms to form a mixture of edge and corner-sharing FeAs4 tetrahedra. All Fe–As bond lengths are 2.61 Å. As3- is bonded in a 8-coordinate geometry to four equivalent Tb3+ and four equivalent Fe2+ atoms. O2- is bonded to four equivalent Tb3+ atoms to form a mixture of edge and corner-sharing OTb4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on HfCuGe2 by Materials Project

HfCuGe2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Hf is bonded to four equivalent Cu and eight Ge atoms to form distorted HfCu4Ge8 cuboctahedra that share corners with four equivalent HfCu4Ge8 cuboctahedra, edges with eight equivalent HfCu4Ge8 cuboctahedra, edges with eight equivalent CuHf4Cu4Ge4 cuboctahedra, faces with four equivalent HfCu4Ge8 cuboctahedra, and faces with four equivalent CuHf4Cu4Ge4 cuboctahedra. All Hf–Cu bond lengths are 3.06 Å. There are four shorter (2.79 Å) and four longer (2.88 Å) Hf–Ge bond lengths. Cu is bonded to four equivalent Hf, four equivalent Cu, and four equivalent Ge atoms to form distorted CuHf4Cu4Ge4 cuboctahedra that share corners with four equivalent CuHf4Cu4Ge4 cuboctahedra, edges with eight equivalent HfCu4Ge8 cuboctahedra, faces with four equivalent HfCu4Ge8 cuboctahedra, and faces with eight equivalent CuHf4Cu4Ge4 cuboctahedra. All Cu–Cu bond lengths are 2.68 Å. All Cu–Ge bond lengths are 2.49 Å. There are two inequivalent Ge sites. In the first Ge site, Ge is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Ge atoms. All Ge–Ge bond lengths are 2.68 Å. In the second Ge site, Ge is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on TiCuSiAs by Materials Project

TiCuSiAs is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Ti4+ is bonded in a 8-coordinate geometry to four equivalent Si4- and four equivalent As1- atoms. All Ti–Si bond lengths are 2.68 Å. All Ti–As bond lengths are 2.66 Å. Cu1+ is bonded in a 4-coordinate geometry to four equivalent As1- atoms. All Cu–As bond lengths are 2.52 Å. Si4- is bonded in a 8-coordinate geometry to four equivalent Ti4+ and four equivalent Si4- atoms. All Si–Si bond lengths are 2.52 Å. As1- is bonded in a 8-coordinate geometry to four equivalent Ti4+ and four equivalent Cu1+ atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NpCuPO by Materials Project

NpCuPO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Np4+ is bonded in a 4-coordinate geometry to four equivalent P3- and four equivalent O2- atoms. All Np–P bond lengths are 2.98 Å. All Np–O bond lengths are 2.29 Å. Cu1+ is bonded to four equivalent P3- atoms to form a mixture of edge and corner-sharing CuP4 tetrahedra. All Cu–P bond lengths are 2.37 Å. P3- is bonded in a 8-coordinate geometry to four equivalent Np4+ and four equivalent Cu1+ atoms. O2- is bonded to four equivalent Np4+ atoms to form a mixture of edge and corner-sharing ONp4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on ThCuPO by Materials Project

ThCuPO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Th4+ is bonded in a 4-coordinate geometry to four equivalent P3- and four equivalent O2- atoms. All Th–P bond lengths are 3.08 Å. All Th–O bond lengths are 2.40 Å. Cu1+ is bonded to four equivalent P3- atoms to form a mixture of corner and edge-sharing CuP4 tetrahedra. All Cu–P bond lengths are 2.41 Å. P3- is bonded in a 8-coordinate geometry to four equivalent Th4+ and four equivalent Cu1+ atoms. O2- is bonded to four equivalent Th4+ atoms to form a mixture of corner and edge-sharing OTh4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SrAgSF by Materials Project

SrFAgS is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Sr2+ is bonded in a 4-coordinate geometry to four equivalent S2- and four equivalent F1- atoms. All Sr–S bond lengths are 3.22 Å. All Sr–F bond lengths are 2.50 Å. Ag1+ is bonded to four equivalent S2- atoms to form a mixture of distorted edge and corner-sharing AgS4 tetrahedra. All Ag–S bond lengths are 2.70 Å. S2- is bonded in a 12-coordinate geometry to four equivalent Sr2+ and four equivalent Ag1+ atoms. F1- is bonded to four equivalent Sr2+ atoms to form a mixture of edge and corner-sharing FSr4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on EuMnBi2 by Materials Project

EuMnBi2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. there are two inequivalent Eu sites. In the first Eu site, Eu is bonded to four Mn and eight Bi atoms to form distorted EuMn4Bi8 cuboctahedra that share corners with eight equivalent EuMn4Bi8 cuboctahedra, corners with eight MnEu4Bi4 tetrahedra, edges with four equivalent EuMn4Bi8 cuboctahedra, edges with four MnEu4Bi4 tetrahedra, and faces with five equivalent EuMn4Bi8 cuboctahedra. All Eu–Mn bond lengths are 3.66 Å. There are four shorter (3.45 Å) and four longer (3.47 Å) Eu–Bi bond lengths. In the second Eu site, Eu is bonded to four Mn and eight Bi atoms to form distorted EuMn4Bi8 cuboctahedra that share corners with eight equivalent EuMn4Bi8 cuboctahedra, corners with eight MnEu4Bi4 tetrahedra, edges with four equivalent EuMn4Bi8 cuboctahedra, edges with four MnEu4Bi4 tetrahedra, and faces with five equivalent EuMn4Bi8 cuboctahedra. All Eu–Mn bond lengths are 3.66 Å. There are four shorter (3.45 Å) and four longer (3.47 Å) Eu–Bi bond lengths. There are two inequivalent Mn sites. In the first Mn site, Mn is bonded to four Eu and four Bi atoms to form distorted MnEu4Bi4 tetrahedra that share corners with eight EuMn4Bi8 cuboctahedra, edges with four EuMn4Bi8 cuboctahedra, edges with four equivalent MnEu4Bi4 tetrahedra, and faces with four equivalent MnEu4Bi4 tetrahedra. All Mn–Bi bond lengths are 2.87 Å. In the second Mn site, Mn is bonded to four Eu and four Bi atoms to form distorted MnEu4Bi4 tetrahedra that share corners with eight EuMn4Bi8 cuboctahedra, edges with four EuMn4Bi8 cuboctahedra, edges with four equivalent MnEu4Bi4 tetrahedra, and faces with four equivalent MnEu4Bi4 tetrahedra. All Mn–Bi bond lengths are 2.87 Å. There are five inequivalent Bi sites. In the first Bi site, Bi is bonded in a 4-coordinate geometry to four equivalent Eu and four equivalent Bi atoms. All Bi–Bi bond lengths are 3.28 Å. In the second Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent Eu and four equivalent Bi atoms. In the third Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent Eu and four Mn atoms. In the fourth Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent Eu and four Mn atoms. In the fifth Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent Eu and four equivalent Bi atoms. All Bi–Bi bond lengths are 3.28 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on GdFeAsO by Materials Project

GdFeAsO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Gd3+ is bonded in a 4-coordinate geometry to four equivalent As3- and four equivalent O2- atoms. All Gd–As bond lengths are 3.33 Å. All Gd–O bond lengths are 2.29 Å. Fe2+ is bonded to four equivalent As3- atoms to form a mixture of edge and corner-sharing FeAs4 tetrahedra. All Fe–As bond lengths are 2.60 Å. As3- is bonded in a 8-coordinate geometry to four equivalent Gd3+ and four equivalent Fe2+ atoms. O2- is bonded to four equivalent Gd3+ atoms to form a mixture of edge and corner-sharing OGd4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on FeAsSe by Materials Project

FeAs(Se) crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Fe3+ is bonded to three equivalent As1- and three equivalent Se2- atoms to form FeAs3Se3 octahedra that share corners with eight equivalent FeAs3Se3 octahedra, corners with three equivalent AsFe3Se tetrahedra, corners with three equivalent SeFe3As tetrahedra, and edges with two equivalent FeAs3Se3 octahedra. The corner-sharing octahedra tilt angles range from 52–59°. There are a spread of Fe–As bond distances ranging from 2.40–2.43 Å. There are two shorter (2.32 Å) and one longer (2.34 Å) Fe–Se bond lengths. As1- is bonded to three equivalent Fe3+ and one Se2- atom to form distorted AsFe3Se tetrahedra that share corners with three equivalent FeAs3Se3 octahedra, corners with four equivalent AsFe3Se tetrahedra, corners with nine equivalent SeFe3As tetrahedra, and an edgeedge with one AsFe3Se tetrahedra. The corner-sharing octahedra tilt angles range from 68–74°. The As–Se bond length is 2.55 Å. Se2- is bonded to three equivalent Fe3+ and one As1- atom to form distorted SeFe3As tetrahedra that share corners with three equivalent FeAs3Se3 octahedra, corners with four equivalent SeFe3As tetrahedra, corners with nine equivalent AsFe3Se tetrahedra, and an edgeedge with one SeFe3As tetrahedra. The corner-sharing octahedra tilt angles range from 76–79°.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NdAsRuO by Materials Project

NdRuAsO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Nd3+ is bonded in a 4-coordinate geometry to four equivalent As3- and four equivalent O2- atoms. All Nd–As bond lengths are 3.39 Å. All Nd–O bond lengths are 2.36 Å. Ru2+ is bonded to four equivalent As3- atoms to form a mixture of edge and corner-sharing RuAs4 tetrahedra. All Ru–As bond lengths are 2.44 Å. As3- is bonded in a 8-coordinate geometry to four equivalent Nd3+ and four equivalent Ru2+ atoms. O2- is bonded to four equivalent Nd3+ atoms to form a mixture of edge and corner-sharing ONd4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on LiLaBi2 by Materials Project

LaLiBi2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Li is bonded to four equivalent Bi atoms to form a mixture of edge and corner-sharing LiBi4 tetrahedra. All Li–Bi bond lengths are 2.90 Å. La is bonded in a 12-coordinate geometry to eight Bi atoms. There are four shorter (3.40 Å) and four longer (3.51 Å) La–Bi bond lengths. There are two inequivalent Bi sites. In the first Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent Li and four equivalent La atoms. In the second Bi site, Bi is bonded in a 8-coordinate geometry to four equivalent La and four equivalent Bi atoms. All Bi–Bi bond lengths are 3.22 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on SmCoAsO by Materials Project

SmCoAsO is Parent of FeAs superconductors structured and crystallizes in the tetragonal P4/nmm space group. The structure is two-dimensional and consists of one CoAs sheet oriented in the (0, 0, 1) direction and one SmO sheet oriented in the (0, 0, 1) direction. In the CoAs sheet, Co2+ is bonded to four equivalent As3- atoms to form a mixture of edge and corner-sharing CoAs4 tetrahedra. All Co–As bond lengths are 2.30 Å. As3- is bonded in a 4-coordinate geometry to four equivalent Co2+ atoms. In the SmO sheet, Sm3+ is bonded in a 4-coordinate geometry to four equivalent O2- atoms. All Sm–O bond lengths are 2.31 Å. O2- is bonded to four equivalent Sm3+ atoms to form a mixture of edge and corner-sharing OSm4 tetrahedra.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on NdPd2 by Materials Project

Pd2Nd is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Nd is bonded in a 8-coordinate geometry to eight equivalent Pd atoms. All Nd–Pd bond lengths are 2.97 Å. Pd is bonded in a 8-coordinate geometry to four equivalent Nd and four equivalent Pd atoms. All Pd–Pd bond lengths are 2.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on Hf2CuSi4 by Materials Project

Hf2CuSi4 is Parent of FeAs superconductors-derived structured and crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional. there are two inequivalent Hf sites. In the first Hf site, Hf is bonded in a 10-coordinate geometry to ten Si atoms. There are a spread of Hf–Si bond distances ranging from 2.70–2.97 Å. In the second Hf site, Hf is bonded to four equivalent Cu and eight Si atoms to form distorted HfCu4Si8 cuboctahedra that share corners with four equivalent HfCu4Si8 cuboctahedra, edges with four equivalent HfCu4Si8 cuboctahedra, edges with eight equivalent CuHf4Cu4Si4 cuboctahedra, faces with four equivalent HfCu4Si8 cuboctahedra, and faces with four equivalent CuHf4Cu4Si4 cuboctahedra. There are two shorter (3.01 Å) and two longer (3.02 Å) Hf–Cu bond lengths. There are four shorter (2.73 Å) and four longer (2.77 Å) Hf–Si bond lengths. Cu is bonded to four equivalent Hf, four equivalent Cu, and four equivalent Si atoms to form CuHf4Cu4Si4 cuboctahedra that share corners with four equivalent CuHf4Cu4Si4 cuboctahedra, edges with eight equivalent HfCu4Si8 cuboctahedra, faces with four equivalent HfCu4Si8 cuboctahedra, and faces with eight equivalent CuHf4Cu4Si4 cuboctahedra. All Cu–Cu bond lengths are 2.60 Å. All Cu–Si bond lengths are 2.41 Å. There are four inequivalent Si sites. In the first Si site, Si is bonded in a 8-coordinate geometry to six equivalent Hf and two equivalent Si atoms. Both Si–Si bond lengths are 2.42 Å. In the second Si site, Si is bonded in a 8-coordinate geometry to four Hf and four equivalent Si atoms. All Si–Si bond lengths are 2.60 Å. In the third Si site, Si is bonded in a 8-coordinate geometry to four Hf and four equivalent Si atoms. In the fourth Si site, Si is bonded in a 8-coordinate geometry to four equivalent Hf and four equivalent Cu atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PrPd2 by Materials Project

PrPd2 is Parent of FeAs superconductors-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Pr is bonded in a 8-coordinate geometry to eight equivalent Pd atoms. All Pr–Pd bond lengths are 2.99 Å. Pd is bonded in a 8-coordinate geometry to four equivalent Pr and four equivalent Pd atoms. All Pd–Pd bond lengths are 2.81 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Design of a Transport System for the PIP-II HB650 Cryomodule

The PIP-II Project at FNAL requires the assembly of 3 high-beta 650MHz cryomodules at STFC Daresbury (DL) in the UK. These modules must be safely transported from DL to FNAL in the USA. Previous experience with cryomodule transport was leveraged at both labs to design a transport system to protect the cryomodules during transit. Requirements for the system included mitigation of shocks, drops, and vibrations, and acting as a lifting fixture. It is comprised of a tessellated steel frame which encompasses the module with a wire rope isolator arrangement which the module mounts to. The frame was designed to withstand the weight of the 12.5 tonne cryomodule in various load cases. Details of shock and vibration profiles were obtained from MIL-STD-810H and were used to guide the sizing of the isolators. The frame and the isolation system were analysed via FEA using the shock and vibration profiles as an input. The transport system was found to be suitable for the given isolation, frame stiffness, and lifting code requirements. The frame has been fabricated and successfully load tested at FNAL. It will now be road tested with a dummy cryomodule before undergoing a trial run to DL.

43 PARTICLE ACCELERATORS↗
DOE OSTI2022

Transportation Analysis of the Fermilab High-Beta 650 MHz Cryomodule

The prototype High-Beta 650 MHz cryomodule for the PIP-II project will be the first of its kind to be transported internationally, and the round trip from FNAL to STFC UKRI will use a combination of road and air transit. Transportation of an assembled cryomodule poses a significant technical challenge, as excitation can generate high stresses and cyclic loading. To accurately assess the behavior of the cryomodule, Finite Element Analysis (FEA) was used to analyze all major components. First, all individual components were studied. For the critical/complex components, the analysis was in fine detail. Afterwards, all models were brought to a simplified state (necessary for computational expenses), verified to have the same behavior as their detailed counterparts, and combined to form larger sub-assemblies, with the ultimate analysis including the full cryomodule. We report the criteria for acceptance and methods of analysis, and results for selected components and sub-assemblies.

43 PARTICLE ACCELERATORS↗
DOE OSTI2023

Prototype HB650 Cryomodule Heat Loads Simulations

During the design stages of the PIP-II cryomodules, many analytical calculations and FEA have been performed on simpler geometry in order to estimate the heat loads and also to optimize the design. To better analyze the cryomodule cold tests, simulations have been performed with MATLAB to determine the temperature of the main components during cool down and to determine the heat loads of the cryomodule. These simulations have been applied to the High Beta 650 MHz prototype cryomodule design and compared to the cold tests performed on it.

43 PARTICLE ACCELERATORS↗