We will detect the scattering of a CW 633 nm laser beam in time on a ms time scale. The sample doesn't absorb at 633 nm but it will undergo physical tranformation (leading to an explosion) so at the beginning it will be transparent and then the light will be scattered more and more. I believe as we start from a transparent sample, the level of light on the detector won't be an issue but the speed might. Is a conventional photodiod fast enough? In articles I see people using avalanche photodiods, photomultipliers or diverse detectors, I'm a bit lost. Thanks for your help