
PRELIMINARY DATA
MAY 1998
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Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject
to change without notice. No patent rights are granted to any of the circuits described herein.
1998 Hamamatsu Photonics K.K.
The F4294-09 is an MCP assembly developed for reflectron mass
spectrometers. In spite of having a center hole for beam line, the
F4294-09 eliminates ringing phenomena which have been a
problem with conventional MCP assemblies with a center hole.
The F4294-09 thus makes high-speed ion detection possible.
This allows a significant size reduction in the TOF mass spec-
trometer and a dramatic improvement in mass resolution.
SPECIFICATIONS
GENERAL
Parameter
Value
69.0
27.0
26.4
12
2
6.0
12.0
Unit
mm
mm
mm
μ
m
-
mm
mm
Assembly Outer Diameter
Effective Diameter
Maximum Height
MCP Channel Diameter
Number of MCP Stages
Center Hole Diameter
Center Dead Space Diameter
MAXIMUM RATINGS (Absolute values)
MCP Supply Voltage (In-Out)
MCP-Out to Anode Voltage
2
kV
kV
0.5
Electric Potential at Each
Terminal
MCP-In: -2.5
MCP-Out: -0.5
Anode: GND
6.7
×
10
kV
Operating Vacuum Condition
Baking Temperature
Baking Time
Baking Vacuum Condition
* Baking cannot be performed.
CHARACTERISTICS (at 1.3
×
10
Gain at 2.0kV
Plate Resistance per MCP
Dark Count at 2.0kV
-4
(5
×
10
- *
- *
- *
-6
) Max.
Pa (Torr)
°C
h
Pa (Torr)
-4
Pa (1
×
10
-6
Torr), Ta=+25°C)
1
×
10
10 to 100
5
6
-
M
cps/cm
2
TMCPF0090
FEATURES
Center hole for beam line
High-speed response
Good output waveform with negligible ringing
APPLICATION
Reflectron mass spectrometer
Ideally suited for reflectron mass spectrometer
MCP ASSEMBLY
WITH CENTER HOLE
FOR REFLECTRON MS
F4294-09
Figure 1: Typical Output Waveform
TMCPB0077EA
RESPONSE TIME (0.5ns/div)
O
RISE TIME: 328ps
FALL TIME: 633ps
FWHM : 592ps
SUPPLY VOLTAGE (MCP): 1700V