HAMAMATSU C5680 Datasheet
Universal Streak Camera C5680 Series
Measurements Ranging From X-Ray to Near Infrared With a Temporal Resolution of 2 ps
The streak camera is an ultra high-speed
detector which captures light emission
phenomena occurring in extremely short
time periods. Not only can the streak camera
measure intensity variations with superb
temporal resolution, but it can also be used
for simultaneous measurement of the spatial
(or spectral) distribution.
The C5680 Streak Camera Series is a
universal streak camera which incorporates
all of the specialized technology and
expertise HAMAMATSU has acquired in over
20 years of research. The streak tubes are
manufactured on a regular production
schedule at Hamamatsu to provide
consistency and reliability. Special requests
and custom designs are also available.
APPLICATIONS
•
Measurement of electron bunch for
synchrotron and LINAC applications
•
Research involving X-ray lasers, free
electron lasers, and various other types
of pulsed lasers
•
Plasma light emission, radiation, laser
ablasion, combustion and explosions
•
Fluorescence lifetime measurement,
transient absorption measurement,
time-resolved raman spectroscopy
•
Optical soliton communications, response
measurement with quantum devices
•
Lidar Thomson scattering, laser distance
measurement
FEATURES
•
Temporal resolution of within 2 ps
A temporal resolution of 2 ps is achieved for both synchroscan
and single shot.
Several plug-in module, operating mode.
•
Accommodates a diverse range of experimental setups
•
from single light emitting phenomena to high-speed
repeated phenomena in the GHz.
•
Can be used in X-ray to near infrared fields
By selecting the appropriate streak tube (light sensor), the
C5680 can be used in a wide range of measurement applications, from X-rays to near infrared light.
Simultaneous measurement of light intensity on
•
temporal and spatial (wavelength) axes
Spectrograph can be placed in front of the streak camera, to
convert the spatial axis to a wavelength axis. This enables
changes in the light intensity to be measured over various
wavelength (time-resolved spectroscopy).
•
Ultra-high sensitivity (detection of single photons)
The streak tube converts light into electrons which are then
multiplied by an electron multiplier. This enables detection of
extremely faint light (at the single-photon level).
(See photon counting integration principle)
IEEE-488 (GP-IB) control
•
Computer control enables remote control and advanced
measurements to be performed out using very simple operation.
•
Diverse selection of peripheral equipment
A full lineup of peripheral devices is available, including
spectroscopes, optical trigger heads, and expansion units.
The operating principle of the streak camera
Sweep electrode
(where electrons
are swept in the
direction from top
to bottom)
MCP
(which multiplies
electrons)
Phosphor screen
(electrons → light)
The intensity of the incident light
can be read from the brightness
of the phosphor screen, and the
time and space from the position
of the phosphor screen.
Optical
intensity
Time
Incident light
Trigger signal
Space
Slit
Photocathode
(light → electrons)
Sweep circuit
Lens
Accelerating electrode
(where electrons
are accelerated)
Streak image
on phosphor screen
Time
Space
OPERATING PRINCIPLE
The light pulse to be measured is projected onto the slit and is
focused by the lens into an optical image on the photocathode
of the streak tube. Changing the temporal and spatial offset
slightly each time, four light pulses, each with a different light
itensity, are introduced through the slit and conducted to the
photocathode.
Here, the photons are converted into a number of electrons
proportional to the intensity of the incident light. The four light
pulses are converted sequentially to electrons which are then
accelerated and conducted towards the photocathode.
As the group of electrons created from the four light pulses
passes between a pair of sweep electrodes, a high voltage is
applied (see above), resulting in a high-speed sweep (the electrons are swept in the direction from top to bottom). The electrons are deflected at different times, and at slightly different
angles in the perpendicular direction, and are then conducted
to the MCP (micro-channel plate).
As the electrons pass the MCP, they are multiplied several
thousands of times and are then bombarded against the phosphorscreen, where they are converted back into light.
The fluorescence image corresponding to the first incident
light pulse is positioned at the top of the phosphor screen, followedby the others, with images proceeding in descending order; inother words, the axis in the perpendicular direction on
the phosphor screen serves as the temporal axis. The brightnesses ofthe various fluorescence images are proportional to
theintensities of the corresponding incident light pulses. The
positions in the horizontal direction on the phosphor screen
correspond to the positions of the incident light in the horizontal direction.
THE PRINCIPLE OF PHOTON COUNTING INTEGRATION
Photoelectrons given off from the photocathode of the streak
tube are multiplied at a high integration rate by the MCP, and
one photoelectron is counted as one intensity point on the
phosphor screen. A threshold value is then used with this photoelectron image to clearly separate out noise.
Separation of Photoelectron
Image and Noise
A/D
conversion
Photoelectron image
value
Threshold
value
Signal output from CCD camera
Noise
Time
(wavelength)
Positions in the photoelectron image which are above the
threshold value are detected and are integrated in the memory,
enabling noise to be eliminated completely. This makes it possible to achieve data measurements with a high dynamic range
and high S/N.
Photon Counting Integration
0ps
200ps400ps 600ps800ps 1ns 1.2ns 1.4ns 1.6ns 1.8ns
Light source: PLP (λ = 800 nm)
Integration time: 1 min.
2
FUNCTION CONFIGURATION
1
C5680 Main Unit (with power supply and camera controller)
Function expansion unit
£
SPECIFICATIONS
1
C5680 Main Unit
1
Input
optics
system
1 Input Optics System
™Sweep unit
2
Streak tube
3
Output
format
Selection of C5680 main unit
Selection of input optics system
Selection of streak tube
Selection of output format
Selection of sweep unit
Selection of function expansion unit
[Suffix (Model No.)]
One of the following suffixes is appended to the model number of
the C5680, depending on the type of streak tube and output format
used.
C5680–
..........
1 Accommodates 200 nm to 850 nm, 1 MCP
2 Accommodates 300 nm to 1600 nm, 1 MCP
. . . .
2 Lens output type
3 Video output type
3 Accommodates 115 nm to 850 nm, 1 MCP
4 Accommodates 200 nm to 900 nm, 1 MCP
5 Accommodates 200 nm to 850 nm, 2 MCPs
2 Streak Tube
Model
Name
A1976-01
A1974
A1974-01
A1976-04
Spectral
Transmission
200 nm to 1600 nm
400 nm to 900 nm
400 nm to 1600 nm
200 nm to 1600 nm
Effective
F Value
Image
Multiplica-
tion Ratio
5.0 1 : 1
1.2 1 : 1
1.2 1 : 1
3.5 1 : 1
The A1974 and A1974-01 are optional units.
100
80
60
40
Transmittance (%)
20
0
Spectral transmittance of input optics system
A1974
A1976-01
200 400 600
800
Wavelength (nm)
1000 1200 1400 1600
Slit
Width
0 to 5 mm
A1974-01
Slit Width
Reading
Precision
5 µ
m
Overall
Length
98.2 mm
159 mm
159 mm
98.2 mm
Model
Name
N5716
N5716-02
N5716-01
N5716-03
N5864
Spectral
Response
Characteristic
200 nm to 850 nm
300 nm to 1600 nm
115 nm to 850 nm
200 nm to 900 nm
200 nm to 850 nm
Effective
Photocathode
Size
• 0.15 × 5.3 mm
Lens output
type
• 0.15 × 4.8 mm
Video output
type
MCP
Gain
3 × 10
6 × 10
3
5
Phosphor
Screen
• Photocathode
characteristic
P-43
• Fiber-optic output
• Effective photo-
cathode size
•
18 mm
Spatial
Resolution
25 lp/mm
or more
centered
on
photocathode
X-ray streak cameras designed for use with 10 eV to 10 keV can
also be selected.
Spectral response of the streak tube
5
10
10
10
10
10
Radiant sensitivity (µA/W)
10
10
N5716-01
4
3
2
1
0
-1
N5716, N5864
N5716-03
N5716-02
-2
10
200 400 600
800 1000 1200 1400 1600
Wavelength (nm)
3
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