GENERAL
Parameter
Description/Value
Unit
Spectral Response
Wavelength of Maximum Response
Photocathode
Window Material
Dynode
Base
Weight
Suitable Socket
nm
nm
--
mm
--
--
--
--
g
--
300 to 650
420
Bialkali
8
8
Borosilicate glass
Linear focused
8
11-pin glass base
Approx. 4.5
E678-11N (supplied)
Material
Minimum Useful Area
Structure
Number of Stages
PHOTOMULTIPLIER TUBE
R2248
MAXIMUM RATINGS (Absolute Maximum Values)
Information furnished by HA MAM ATS U 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.
Subject to local technical requirements and regulations, availability of products included in this promotional material may var y. Please consult with our sales office.
10mm
10mm Square Envelope, Head-On Type
8-Stage, Bialkali Photocathode
CHARACTERISTICS (at 25
C)
Parameter
Min.
Unit
Parameter
Value
Unit
Supply Voltage
Average Anode Current
Ambient Temperature
1500
250
0.03
-80 to +50
Vdc
Vdc
mA
C
Between Anode and Cathode
Between Anode and Last Dynode
Cathode Sensitivity
Anode Sensitivity
Gain
Anode Dark Current (after 30min. storage in darkness)
Time Response
Luminous (2856K)
Radiant at 420nm
Blue (CS 5-58 filter)
Luminous (2856K)
Anode Pulse Rise Time
Electron Transit Time
60
--
--
30
--
--
--
95
76
9.5
100
1.1
10
6
1
0.9
9
A/lm
mA/W
A/lm-b
A/lm
--
nA
ns
ns
--
--
--
--
--
50
--
--
Typ.
Max.
Supply Voltage: 1250Vdc, K: Cathode, Dy: Dynode, P: Anode
VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrodes
Ratio
K
Dy1
2
Dy2
2
Dy3
1
Dy4
1
Dy5
1
Dy6
1
Dy7
1
Dy8
1
P
1
PHOTOMULTIPLIER TUBE R2248
Figure 1: Typical Spectral Response
TPMH1228E01
SEPT. 1998
HAMAMATSU PHOTONICS K.K., Electoron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205
U.S.A.: Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910, Bridgewater. N.J. 08807-0910, U.S.A., Telephone: (1)908-231-0960, Fax: (1)908-231-1218
Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658
France: Hamamatsu Photonics France S.A.R.L.: 8, 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
United Kingdom: Hamamatsu Photonics UK Limited: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: (44)181-367-3560, Fax: (44)181-367-6384
North Europe: Hamamatsu Photonics Norden AB: Frgatan 7, S-164-40 Kista Sweden, Telephone: (46)8-703-29-50, Fax: (46)8-750-58-95
Italy: Hamamatsu Photonics Italia: S.R.L.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)02-935 81 733, Fax: (39)02-935 81 741
TPMHB0543EA
Figure 2: Typical Gain Characteristics
TPMHB0565EA
Figure 3: Dimensional Outline and Basing Diagram (Unit: mm)
TPMHA0098EA
TACCA0043EA
Socket
(E678-11N)
10
8
10
7
10
6
10
5
10
4
10
3
10
2
500
1000
700
1500
2000
SUPPLY VOLTAGE (V)
GAIN
1
2
3
4
5
6
7
8
9
10
11
IC
DY1
DY3
DY5
DY7
P
DY8
DY6
DY4
DY2
K
FACEPLATE
PHOTOCATHODE
8MIN.
8MIN.
10MAX.
11 PIN BASE
45.0
1.5
9.8
0.4
9.8
0.4
SHORT PIN
4.3
9.5
10.5
11
3
3
9.5
100
10
1
0.1
0.01
200
600
800
400
WAVELENGTH (nm)
CA
THODE RADIANT
SENSITIVITY
(mA/W)
QUANTUM EFFICIENCY
(%)
CATHODE
RADIANT
SENSITIVITY
QUANTUM
EFFICIENCY
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