R6985-80_15 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – ELECTRON MULTIPLIER

ELECTRON MULTIPLIER
R6985-80
With Conversion Dynode, Off-axis Structure
for Gas / liquid QMS (Quadruple Mass Spectrometry)
SPECIFICATIONS
GENERAL
Parameter
Input Aperture Diameter
Dynode Structure
Number of Dynode Stages
First Dynode Material
Total Built-in Resistance
Operating Ambient Temperature
Storage Temperature
Polarity of Detected Ions
Description / Value Unit
11
mm
Conversion + box and linear focused —
19
—
Al2O3
—
17.15
MΩ
-30 to +50
°C
-80 to +50
°C
Positive / Negative
—
MAXIMUM RATINGS
Parameter
Value
Unit
Anode to First Dynode Voltage
-3000
V
Anode to Last Dynode Voltage
350
V
Conversion Supply Voltage
±10
kV
Operating Vacuum Level
1 × 10^-2
Pa
Bake-Out Temperature (at 5 × 10^-3 Pa)
No baking
—
Average Anode Current ^A
10
µA
Operating Gain
1 × 10⁸
—
CHARACTERISTICS
Parameter
Value
Recommened Supply Voltage
-1900
Gain (Typ.)
1 × 10⁶
DC Linearity (Typ.)
5
Dark Current (Max.)
1
Rise Time (Typ.)
4.5
Anode to All Other Electrode Capacitance
1.8
NOTE: A Averaged over any interval of 30 seconds maximum.
Unit
V
—
µA
pA
ns
pF
Figure 2: Dimensional Outline (Unit: mm)
CONVERSION DYNODE PIN
Figure 1: Typical Gain
10^{9 TPMHB0876EA}
10⁸
10⁷
10⁶
10⁵
10⁴
10³
58 ± 1
93 ± 1
CONVERSION DYNODE 30.0 ± 0.5
12 ± 1
50.0 ± 0.5
2- 3.1
MOUNTING
HOLES
10²
-1000
-1500
-2000
-2500
SUPPLY VOLTAGE (V)
-3000
INPUT APERTURE 11.0 ± 0.2
ELECTRON MULTIPLIER
HIGH VOLTAGE PIN
30.0 ± 0.5
OUTPUT PIN
TPMHA0587EA
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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. ©2014 Hamamatsu Photonics K.K.