The document reports on the superconducting properties of titanium and niobium-titanium alloys. It describes how the critical magnetic fields were measured for two titanium specimens with different purities down to 0.23°K. The second specimen had a higher transition temperature and lower initial critical field slope. Several particle accelerators and experiments are also described that used niobium-titanium superconducting magnets operating between 1.8-8.3 Tesla and cooled with liquid helium.

1. Report on
Super Conductor
Name: ‫ﻓﺮﺝ‬ ‫ﻣﺤﻤﺪ‬ ‫ﻣﺤﻤﻮﺩ‬‫ﺃﺣﻤﺪ‬
Section: 7
No: 169

2. ‐Critical magnetic fields of two specimens of titanium have been measured
down to 0.23°K. The first specimen was a cold worked Ti wire having a purity of
99.98 percent.
‐It was found to be superconducting at 0.37°K in zero magnetic field and the
initial slope of the critical field curve was 465 gauss per degree.
‐ The second specimen was a Ti crystal bar with a purity greater than 99.99
percent. Its transition temperature was 0.49°K, and the initial slope of the
critical field curve was 400 gauss per degree.
‐The superconducting properties of metallic multilayers composed of two
superconductors, Nb and Nb0.37Ti0.63, primarily in magnetic fields oriented
near to parallel to layers.
A bubble chamber at Argonne National Laboratory has a 4.8 meter diameter Nb‐
Ti magnet producing a magnetic field of 1.8 tesla.[4]
About 1000 NbTi SC magnets were used in the 4 mile long main ring of the
Everton accelerator at Fermi lab.[5] The magnets were wound with 50 tons of
copper cables containing 17 tons of NbTi filaments.[6] They operate at 4.5 K at
fields up to 4.5 tesla.
1999: The Relativistic Heavy Ion Collider uses 1,740 NbTi SC 3.45 tesla magnets
to bend beams in its 3.8 km double storage ring.[7]
In the Large Hadron Collider particle accelerator the magnets (containing 1200
tons of NbTi cable[8]) are cooled to 1.9 K to allow safe operation at fields of up to
8.3 T.
Niobium‐titanium superconducting magnet coils (liquid helium cooled) were
built to be used in the Alpha Magnetic Spectrometer mission to be flown on the
international space station. They were later replaced by non‐superconducting
magnets.
The experimental fusion reactor ITER uses Niobium‐titanium for its pilonidal
field coils. In 2008 a test coil achieved stable operation at 52 kA and 6.4 Tesla.[9]