Double clad BCF 91A wavelength-shifting optical fibre, 450mm long (approx.) x 1mm diameter, as used in output from scintillators, c1995. Double clad BCF 91A wavelength-shifting optical fibre 1990-1996
Mounted X-ray spectrograms illustrating crystal grain growth in copper due to annealing ( two mounts, 4 photos on each) Mounted X-ray spectrograms illustrating crystal grain growth in copper due to annealing
Photograph, 7" x 5", showing vacuum chamber of cyclotron almost in place between the poles of the electro-magnet, (Lawrence & Cooksey cyclotron, 1936) Photograph, 7" x 5"
Colour transparency showing the effects produced by a cyclotron in operation Colour transparency showing the effects of cyclotron
Photograph, 7" x 5", showing iron cover ready to be placed on cyclotron vacuum chamber (Lawrence & Cooksey cyclotron, 1936) (copied from 1938-505 No. 6) Photograph, 7" x 5"
Photograph 6 1/2" x 4 3/4" showing J.J. Thomson's original positive-ray apparatus (ex King George V Special Jubilee Exhibition 1935) Photograph showing J.J. Thomson's positive-ray apparatus