In submarine communications cables having a copper tube surrounding optical conductors, an armoring that surrounds the tube and is made of braided strands, a jacket layer made for example of a copper tube and external insulation, the jacket layer of copper or copper tube is complicated and expensive to produce and the copper jacket layer impairs the flexibility of the submarine communications cable. The invention provides for the copper jacket layer around the strands of the armoring to be replaced by a wrapped layer formed by at least one thin, flexible band that can be easily wrapped like a tape around the strands of the armoring, and the wrapped layer formed from the at least one thin, flexible band increases the flexibility of the submarine communications cable.

An X-ray generation apparatus includes an X-ray tube; a drive circuit that drives the X-ray tube; a voltage generation circuit that generates an electron acceleration voltage applied to the X-ray tube; and a control unit that communicates with the drive circuit, and at least the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil. At least a part of a path connecting the drive circuit and the control unit is formed of an optical fiber cable arranged inside the storage container, and the optical fiber cable has electric field mitigation means for suppressing an electric field occurring due to a potential difference between the drive circuit and the control unit from locally concentrating along a longitudinal direction of the optical fiber cable.

In submarine communications cables having a copper tube surrounding optical conductors, an armoring that surrounds the tube and is made of braided strands, a jacket layer made for example of a copper tube and external insulation, the jacket layer of copper or copper tube is complicated and expensive to produce and the copper jacket layer impairs the flexibility of the submarine communications cable. The invention provides for the copper jacket layer around the strands of the armoring to be replaced by a wrapped layer formed by at least one thin, flexible band that can be easily wrapped like a tape around the strands of the armoring, and the wrapped layer formed from the at least one thin, flexible band increases the flexibility of the submarine communications cable.

An X-ray generation apparatus includes an X-ray tube; a drive circuit that drives the X-ray tube; a voltage generation circuit that generates an electron acceleration voltage applied to the X-ray tube; and a control unit that communicates with the drive circuit, and at least the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil. At least a part of a path connecting the drive circuit and the control unit is formed of an optical fiber cable arranged inside the storage container, and the optical fiber cable has electric field mitigation means for suppressing an electric field occurring due to a potential difference between the drive circuit and the control unit from locally concentrating along a longitudinal direction of the optical fiber cable.

In one aspect, the present invention relates to a communications cable, which comprises a support separator providing a plurality of channels for receiving transmission media, said support separator comprising a first polymeric material, at least one optical fiber disposed in one of said channels, at least an electrical conductor capable of carrying at least about 10 watts of electrical power disposed in another one of said channels, an insulation at least partially covering said electrical conductor, a jacket surrounding said support separator and said transmission media, said jacket comprising a second polymeric material. In some embodiments, the first and second polymeric materials can be the same material, and in other embodiments, they can be different materials.

The disclosed system may include (1) a drive subsystem that translates along a powerline conductor, (2) a rotation subsystem that rotates a segment of fiber optic cable about the powerline conductor while the drive subsystem translates along the powerline conductor such that the segment of fiber optic cable is wrapped helically about the powerline conductor, and (3) an extension subsystem that (a) mechanically couples the rotation subsystem to the drive subsystem, and (b) selectively extends the rotation subsystem away from the drive subsystem and the powerline conductor to avoid obstacles along the powerline conductor. Various other systems and methods are also disclosed.

An X-ray generating device includes an X-ray tube, an X-ray tube drive circuit, an electron acceleration voltage generation circuit, and a control unit communicating with the drive circuit and the voltage generation circuit, the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil, a path connecting the drive circuit and the control unit includes an optical fiber cable arranged inside the storage container, the optical fiber cable has a coating that suppresses fluctuation due to a convective flow of the insulating oil, the coating is cured by, from a resin material containing a plasticizer, a part of the plasticizer being leaching out, and the control unit is configured to facilitate leaching of the plasticizer by driving the voltage generation circuit to apply a voltage to the optical fiber cable in a state of no X-ray being generated.

In one aspect, the present invention relates to a communications cable, which comprises a support separator providing a plurality of channels for receiving transmission media, said support separator comprising a first polymeric material, at least one optical fiber disposed in one of said channels, at least an electrical conductor capable of carrying at least about 10 watts of electrical power disposed in another one of said channels, an insulation at least partially covering said electrical conductor, a jacket surrounding said support separator and said transmission media, said jacket comprising a second polymeric material. In some embodiments, the first and second polymeric materials can be the same material, and in other embodiments, they can be different materials.

An X-ray generating device includes an X-ray tube, an X-ray tube drive circuit, an electron acceleration voltage generation circuit, and a control unit communicating with the drive circuit and the voltage generation circuit, the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil, a path connecting the drive circuit and the control unit includes an optical fiber cable arranged inside the storage container, the optical fiber cable has a coating that suppresses fluctuation due to a convective flow of the insulating oil, the coating is cured by, from a resin material containing a plasticizer, a part of the plasticizer being leaching out, and the control unit is configured to facilitate leaching of the plasticizer by driving the voltage generation circuit to apply a voltage to the optical fiber cable in a state of no X-ray being generated.

An X-ray generating device includes an X-ray tube, an X-ray tube drive circuit, an electron acceleration voltage generation circuit, and a control unit communicating with the drive circuit and the voltage generation circuit, the X-ray tube, the drive circuit, and the voltage generation circuit are arranged inside a storage container filled with an insulating oil, a path connecting the drive circuit and the control unit includes an optical fiber cable arranged inside the storage container, the optical fiber cable has a coating that suppresses fluctuation due to a convective flow of the insulating oil, the coating is cured by, from a resin material containing a plasticizer, a part of the plasticizer being leaching out, and the control unit is configured to facilitate leaching of the plasticizer by driving the voltage generation circuit to apply a voltage to the optical fiber cable in a state of no X-ray being generated.