A decontamination system for decontaminating surfaces on an aircraft from pathogens, the decontamination system comprising: one or more UV light sources, configured to generate one or more UV light beams with a wavelength of between about 200 nanometers and about 240 nanometers; and a UV transparent apparatus comprising a first transparent surface and a second transparent surface, wherein the UV transparent apparatus comprising a material, transparent to the wavelength of between about 200 nanometers and about 240 nanometers, the material forming the first transparent surface and the second transparent surface, said second transparent surface being located on an opposite side of the first transparent surface, wherein the first transparent surface formed from a quartz glass is in a direct line of sight of the one or more UV light sources such that the first transparent surface is directly exposed to the one or more UV light beams for decontamination of the first transparent surface from the pathogens, wherein the second transparent surface is indirectly exposed to the one or more UV light beams and wherein the second transparent surface is decontaminated from the pathogens by transmission of the one or more UV light beams through the first transparent surface and through the body of UV transparent apparatus between the first transparent surface and the second transparent surface, and wherein the transmission of the one or more UV light beams through the UV transparent apparatus between the first transparent surface and the second transparent surface is at least about 80%. one or more UV light sources, configured to generate one or more UV light beams with a wavelength of between about 200 nanometers and about 240 nanometers; and a UV transparent apparatus comprising a first transparent surface and a second transparent surface, wherein the UV transparent apparatus comprising a material, transparent to the wavelength of between about 200 nanometers and about 240 nanometers, the material forming the first transparent surface and the second transparent surface, said second transparent surface being located on an opposite side of the first transparent surface, wherein the first transparent surface formed from a quartz glass is in a direct line of sight of the one or more UV light sources such that the first transparent surface is directly exposed to the one or more UV light beams for decontamination of the first transparent surface from the pathogens, wherein the second transparent surface is indirectly exposed to the one or more UV light beams and wherein the second transparent surface is decontaminated from the pathogens by transmission of the one or more UV light beams through the first transparent surface and through the body of UV transparent apparatus between the first transparent surface and the second transparent surface, and wherein the transmission of the one or more UV light beams through the UV transparent apparatus between the first transparent surface and the second transparent surface is at least about 80%. wherein the UV transparent apparatus comprising a material, transparent to the wavelength of between about 200 nanometers and about 240 nanometers, the material forming the first transparent surface and the second transparent surface, said second transparent surface being located on an opposite side of the first transparent surface, wherein the first transparent surface formed from a quartz glass is in a direct line of sight of the one or more UV light sources such that the first transparent surface is directly exposed to the one or more UV light beams for decontamination of the first transparent surface from the pathogens, wherein the second transparent surface is indirectly exposed to the one or more UV light beams and wherein the second transparent surface is decontaminated from the pathogens by transmission of the one or more UV light beams through the first transparent surface and through the body of UV transparent apparatus between the first transparent surface and the second transparent surface, and wherein the transmission of the one or more UV light beams through the UV transparent apparatus between the first transparent surface and the second transparent surface is at least about 80%.