A demonstration of ultra-high time resolution with a pulse-dilation photo-multiplier

9th International Conference on Inertial Fusion Sciences and Applications

Hares, J.D.^1 ; Dymoke-Bradshaw, A.K.L.^1 ; Hilsabeck, T.J.^2 ; Kilkenny, J.D.^2 ; Morris, D.^2 ; Horsfield, C.J.^3 ; Gales, S.G.^3 ; Milnes, J.^4 ; Herrmann, H.W.^5 ; McFee, C.^6

Kentech Instruments Ltd., Wallingford, United Kingdom^1

General Atomics, San Diego

CA, United States^2

Atomic Weapons Establishement, Aldermaston, United Kingdom^3

Photek Ltd, St Leonards on Sea, United Kingdom^4

Los Alamos National Laboratory, Los Alamos

NM, United States^5

Sydor Instruments LLC, Rochester

NY, United States^6

关键词: Axial magnetic field;    Cathode voltages;    Drift regions;    Electrical signal;    High-speed photo;    Micro channel plate;    Optical signals;    Time resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/717/1/012093/pdf
DOI  :  10.1088/1742-6596/717/1/012093

来源: IOP

【 摘 要 】

A novel microchannel plate (MCP) intensified high-speed photo-multiplier tube making use of pulse-dilation[1] has been tested. A ramped photo-cathode voltage followed by a relatively long drift region results in a transit time which is dependent on the photo-electron birth time. This leads to temporal magnification or dilation, so providing an enhancement in time resolution of the optical signal with respect to the electrical signal at the output anode. By this means a time resolution on the order of picoseconds may be realized with a substantially slower oscilloscope. The photo-electron signal is guided from a photo-cathode to an MCP by an axial magnetic field and a short input record length is stretched by a factor up to 40X to yield significantly improved time resolution at the photo-cathode. Results of the first measurements are presented.