Hamamatsu Photonics C10910, Инструкция по эксплуатации, Страница: 19 / 105

C10910 INSTRUCTION MANUAL Ver.1.19E
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T
Temporal Resolution:
This is the boundary of the resolution capability which differentiates two phenomena which
are consecutive in terms of time. It is defined by the FWHM of the intensity of the streak
image for the incident light with a time width (pulse width) which can be infinitely close to but
not equal to zero.
Time-Resolved Spectroscopy:
In time-resolved spectroscopy, temporal changes in the intensity of light at various
wavelengths are measured. A spectroscope is set in front of the streak camera, and light
separated in the horizontal direction is collected and an image formed at the level input slit in
order to be measured.
Trigger Delay:
In order to obtain a streak image in the center of the phosphor screen, the trigger signal has
to arrive at the slit earlier than the incident light. The trigger delay is used to adjust this
difference in timing.
Trigger Jitter:
When a phenomenon is being repeated in order to measure it (streak images are being
integrated), the position of the streak image on the phosphor screen changes slightly each
time , because of fluctuation in the operation timing of the sweep circuit and other factors.
This fluctuation is called trigger jitter, and is one element which limits the temporal resolution
of the system. It can be a particular problem with high-speed sweeps. (With low-speed
sweeps, the trigger jitter is lower than the temporal resolution, and can be ignored.)
The trigger jitter is determined by the difference between the FWHM of a single pulse and the
FWHM when pulses are integrated.
W
Window Material:
This is a panel which makes up the photocathode, and is made of material with a superb light
transmission characteristic. Various materials such as MgF2, ultraviolet glass, and fiber plate
are used as window materials. The window material varies depending on the boundary
transmittance wavelength of the ultraviolet region.