Hamamatsu R1328U-01 Vacuum Photodetector w/ 200 ps rise time. - AS IS Hamamatsu Vacuum Photodetector with N-connector output.
Bent at the top
The high voltage polarization (2kV)is applied via a HV BNC connector on the side.
The rise time of this detector is ~200 ps and a corresponding BW of 1.6 GHz.
For specifications go to this page on the manufacturer's site:
Note that the R1328U-51 replaces the now obsolete R1328U-01. The factory advises that it is a direct replacement with the exception of the connector - the -01 uses an mhb type and the -51 an shb type.
It does have a slight bend in the female threaded part which our tech says could be banged out and even re-cut if needed. It is not a large bend but just enough so it would not screw down properly.