Datasheet

ELECTRON MULTIPLIER
R8811
For Compact Mass Spectrometers
OVERVIEW
Quadrupole mass spectrometers used for residual gas analyzers
have been downsized to solve problems of limited installation
space. A trend of the downsizing would be an ever-greater degree in the future. However, it cannot be achieved just by reducing the ion source and Quadrupole electrode sizes. Small ion
detector is also required essentially. To meet the requirement,
Hamamatsu has developed a compact ion detector. The unique
ion detector breaks the performance barriers on conventional
electron multipliers and will prove the ideal result for your needs.
Figure 1: Typical Gain
SPECIFICATIONS
107
GENERAL
Description / Value
3
Circular cage
13
Al2O3
13
-30 to +50
-80 to +50
Positive
Unit
mm
—
—
—
MΩ
°C
°C
—
MAXIMUM RATINGS
Parameter
Anode to First Dynode Voltage
Anode to Last Dynode Voltage
Faraday Cup Voltage
Operating Vacuum Level
Bake-Out Temperature (at 5 × 10-3 Pa)
Average Anode Current A
Operating Gain
105
104
Value
-2000
200
200
1 × 10-2
350
10
1 × 107
Unit
V
V
V
Pa
°C
µA
—
Value
-1500
1 × 105
5
1
1.6
0.75
Unit
V
—
µA
pA
ns
pF
CHARACTERISTICS
Parameter
Recommened Supply Voltage
Gain (Typ.)
DC Linearity (Typ.)
Dark Current (Max.)
Rise Time (Typ.)
Anode to All Other Electrode Capacitance
106
GAIN
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
TEM B0060EB
103
102
-1000
-1500
SUPPLY VOLTAGE (V)
NOTE: A Averaged over any interval of 30 seconds maximum.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
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.
-2000
ELECTRON MULTIPLIER R8811
STRUCTURE
This electron multiplier has an off-axis structure and a Faraday cup needed for ion detection in Quadrupole mass spectrometers which are capable of making precise measurements over a wide dynamic range with a high S/N. The structure also incorporates a voltage divider, which is essential for discrete type electron multipliers. By simply wiring the
high voltage, the signal and the Faraday cup, reliable operation can be achieved without adding any other parts.
GND
Q-POLE
Ions emitted from Quadrupole are multiplied while being deflected
and focused by the electron lens created by the combination of the
Faraday cup, the ion deflection electrodes and the electron multiplier electrodes. The layout of the Faraday cup, the ion deflection
electrodes and the electron multiplier electrodes are designed by
special 3D simulation of ion and electron trajectories. This layout allows detecting the input ions with high efficiency.
FARADAY-CUP
POSITIVE ION
ELECTRON
Q-POLE
-1500 V
TEM C0025EB
DIMENSIONAL OUTLINE (Unit: mm)
20.0 ± 0.5
20.0 ± 0.5
OUTPUT LEAD
FARADAY CUP LEAD
10
19.5 ± 0.5
10
INPUT
APERTURE
3 ± 0.2
HIGH VOLTAGE LEAD
TOP VIEW
SIDE VIEW
BOTTOM VIEW
TEM A0021EA
HAMAMATSU PHOTONICS K.K.
www.hamamatsu.com
HAMAMATSU PHOTONICS K.K., Electron Tube Division
314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218 E-mail: [email protected]
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: [email protected]
France: Hamamatsu Photonics France S.A.R.L.: 19, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: (33)1 69 53 71 00, Fax: (33)1 69 53 71 10 E-mail: [email protected]
United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44)1707-294888, Fax: (44)1707-325777 E-mail: [email protected]
North Europe: Hamamatsu Photonics Norden AB: Torshamnsgatan 35 SE-164 40 Kista, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: [email protected]
TPMH1340E02
Italy: Hamamatsu Photonics Italia S.r.l.: Strada della Moia, 1 int. 6, 20020 Arese (Milano), Italy, Telephone: (39)02-93581733, Fax: (39)02-93581741 E-mail: [email protected]
China: Hamamatsu Photonics (China) Co., Ltd.: B1201 Jiaming Center, No.27 Dongsanhuan Beilu, Chaoyang District, Beijing 100020, China, Telephone: (86)10-6586-6006, Fax: (86)10-6586-2866 E-mail: [email protected]
AUG. 2014 IP
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