GENERAL
Parameter
Description/Value
Unit
Spectral Response
Wavelength of Maximum Response
Photocathode
Window Material
Dynode
Base
Suitable Socket
Suitable Socket Assembly
Direct Interelectrode
Capacitance
nm
nm
--
mm
--
--
--
--
--
pF
pF
185 to 850
420
Multialkali
16
18
UV glass
Circular-cage
9
JEDEC No. B11-88
E678-11A
E717-05
1.2
3.4
Material
Useful Area (Minimum)
Structure
Number of Stages
Anode to Last Dynode
Anode to All Other Electrodes
PHOTOMULTIPLIER TUBE
R2368
TRANSMISSION MODE PHOTOCATHODE
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.
Good Spatial Uniformity, Wide Angle of Radiant Input
Multialkali Photocathode
For UV-Visible Spectrophotometers and General Applications
CHARACTERISTICS (at 25
C)
Parameter
Typ.
Unit
Anode Luminous Sensitivity
(NOTE 2, 3)
Cathode Luminous Sensitivity
(NOTE 4)
Cathode Red/White Ratio
(NOTE 5)
Gain
(NOTE 2)
Anode Dark Current
(NOTE 2)
Anode Pulse Rise Time
(NOTE 2, 6)
Current Hysteresis
(NOTE 7)
Voltage Hysteresis
(NOTE 7)
A/lm
A/lm
--
--
nA
ns
%
%
200
150
0.15
1.3
10
6
5
1.2
0.1
1.0
Min.
50
80
--
--
--
--
--
--
Max.
--
--
--
--
50
--
--
--
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Value
Unit
Supply Voltage
Average Anode Current
(NOTE 1)
Ambient Temperature
V
V
mA
C
1250
250
0.1
-80 to +50
Anode and Cathode
Anode and Last Dynode
Figure 1: Typical Spectral Response
TPMSB0148EA
R2386 is a 28mm (1-1/8 Inch) diameter, side-on photomultiplier tube having a trans-
mission mode multialkali photocathode. The transmission mode photocathode off-
ers better spatial uniformity and wider angle of radiation input than conventional
side-on tubes which have opaque photocathodes (reflection mode photocathode).
Also, this type of photocathodes is independent of polarized light.
The R2368 has a 9-stage dynode which provides high gain and employs an HA
Coating for noise reduction and an "Anti-hysteresis design".
100
10
1
0.1
0.01
200
400
600
800
1000
WAVELENGTH (nm)
CA
THODE RADIANT
SENSITIVITY
(mA/W)
QUANTUM EFFICIENCY
(%)
CATHODE
RADIANT
SENSITIVITY
QUANTUM
EFFICIENCY
PHOTOMULTIPLIER TUBE R2368
Figure 2: Typical Spatial Uniformity
TPMS1043E01
JUN. 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 Limted: 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.: Via Della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: (39)2-935 81 733, Fax: (39)2-935 81 741
TPMSB0149EA
Figure 3: Dimensional Outline and Basing Diagram
(Unit: mm)
TPMSA0026EA
NOTES
1. Averaged over any interval of 30 seconds maximum.
2. Supply voltage of 1000 volts is applied between the cathode
and the anode using the voltage distribution ratio shown
below.
3. The light source is a tungsten filament lamp operated at a
distribution temperature of 2856K. The light input is 0.01
microlumen.
4. Under the same conditions as Note 3 except that the light
input is 0.01 lumen and 100 volts are applied between the
cathode and all other electrodes connected together as an
anode.
5. The red/white ratio is the quotiant of the cathode current
measured using a red filter (Toshiba R-68) interposed
between the light source and the tube by the cathode current
measured with the filter removed under the same condition
as Note 4.
6. The rise time is the time for the output pulse to rise from
10% to 90% of the peak amplitude when the entire photo-
cathode is illuminated by a delta function light pulse.
7. Hysteresis is a temporary instability in anode current after
light and voltage are applied.
K: Cathode, Dy: Dynode, P: Anode
Electrodes
Distribution
Ratio
K
Dy1
1
Dy2
1
Dy3
1
Dy4
1
Dy5
1
Dy6
1
Dy7
1
Dy8
1
Dy9
1
1
P
Warning-Personal Safety Hazards
Electrical Shock -- Operating voltage
applied to this device presents shock hazard.
1
2
4
3
5
7
6
8
9
10
K
DY1
DY2
DY3
DY4
DY5
DY6
DY7
DY8
DY9
P
DIRECTION OF LIGHT
11
29.0 1.7
18MIN.
PHOTO-
CATHODE
16MIN.
49.0 2.5
76MAX.
90MAX.
11 PIN BASE
JEDEC No. B11-88
32.2 0.5
HA COATING
100
80
60
40
20
0
15
10
5
0
5
10
15
Y
X
15
10
5
0
5
10
15
DISTANCE FROM CENTER OF
PHOTOCATHODE (mm)
DISTANCE FROM CENTER OF
PHOTOCATHODE (mm)
SPOT SIZE : 1mm DIA.
SUPPLY VOLTAGE: 1000V
WAVELENGTH : 400nm
RELA
TIVE SENSITIVITY
(%)
X-Axis
Y-Axis
CATHODE
ANODE
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