GENERAL
FEATURES
Parameter
Description/Value
Unit
Spectral Response
Wavelength of Maximum Response
Photo-
cathode
Window Material
Dynode
Base
Suitable Socket
nm
nm
--
mm
--
--
--
--
--
300 to 800
530
Multialkali
12.7
16.5
Borosilicate Glass
Circular-cage
10
12-pin base, JEDEC No. B12-43
E678-12A
Material
Minimum Projected Size
Structure
Number of Stages
DORMER TYPE
PHOTOMULTIPLIER TUBE
R1923
OPAQUE HIGH SENSITIVITY PHOTOCATHODE
lnformation furnished by HA MAM ATS U is believed to be reliabIe. However, no responsibility is assumed for possibIe 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.
For Scattering Light and Fluorescence Detection
38mm (1-1/2 Inch) Diameter, 10-Stage Dynode
CHARACTERISTICS (at 25
C)
Parameter
Typ.
Unit
Cathode
Sensitivity
Anode
Sensitivity
Gain
(NOTE 2)
Anode Dark Current (after 30min.)
(NOTE 2)
Time
Response
A/lm
mA/W
%
--
A/lm
A/W
--
nA
ns
300
89
20
0.12
15
4.4
10
3
5.0
10
4
2
2.2
22
Min.
200
--
--
--
5
--
--
--
--
--
Max.
--
--
--
--
--
--
--
10
--
--
Luminous
Radiant at 530nm
Quantum Efficiency
at 530nm
Red/White Ratio
Luminous
(NOTE 2, 3)
Radiant
Rise Time at 1500V
Transit Time at 1500V
Figure 1: Typical Spectral Response
TPMSB0145EA
The Hamamatsu R1923 is 38mm (1-1/2 Inch) diameter, dormer type (side-on type)
photomultiplier tube. The R1923 has a multialkali photocathode. This photocathode
obtains a super-high sensitivity because of dormer type photocathode structure,
which works as an optical enhancement to photoemission.
The R1923 is directly replaceable with RCA 4526 and is recommended for use in the
semiconductor mask aligner application, laser application such as laser doppler velo-
cimeter, fluorescence measurement for clinical instrument and other low light level
applications.
High Cathode Sensitivity ............................................... R1923: 300
A/lm (Typ.)
Large Useful Photocathode ................................................12.7
16.5mm (Min.)
High Frequency Response (at -3dB point) .................................. 100MHz (Typ.)
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Description/Value
Unit
Supply
Voltage
Average Anode Current
(NOTE 1)
Ambient Temperature
2000
250
0.1
-80 to +50
V
V
mA
C
Between Anode
and Cathode
Between Anode
and Last Dynode
1000
100
10
1
0.1
200
400
600
800
1000
WAVELENGTH (nm)
CA
THODE RADIANT
SENSITIVITY
(mA/W)
QUANTUM EFFICIENCY
(%)
CATHODE
RADIANT
SENSITIVITY
QUANTUM
EFFICIENCY
PHOTOMULTIPLIER TUBE R1923
Figure 1: Typical Gain Characteristics
TPMS1042E01
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
TPMSB0146EA
Figure 2: Frequency Characteristics
TPMHB0147EA
Figure 3: Dimensional Outline and Basing Diagram
(Unit: mm)
TPMSA0022EA
NOTES
1. Averaged over any interval of 30 seconds maximum.
2. Supply voltage of 1250 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 0.1
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 (Corning 2-62) interposed
between the light source and the tube by the cathode current
measured with the filter removed under the same conditions
as Note 4.
K: Cathode, Dy: Dynode, P: Anode
Electrodes
Distribution
Ratio
K
Dy1
2
Dy2
1
Dy3
1
Dy4
1
Dy5
1
Dy6
1
Dy7
1
Dy8
1
Dy9
Dy10
1
1
1
P
Warning-Personal Safety Hazards
Electrical Shock -- Operating voltage
applied to this device presents shock hazard.
DY1
1
2
3
4
5
6
7
8
9
10
11
12
DY3
DY5
DY7
DY9
P
DY10
DY8
DY6
DY4
DY2
K
B Bottom View
38.5 1.1
17.2MIN.
16.5MIN.
66 1
76.4MAX.
45.7MIN.
12 PIN BASE
JEDEC No. B12-43
6.3MIN.
PHOTO-
CATHODE
15.2MIN.
12.7MIN.
2.5
PHOTO
CATHODE
FACEPLATE
DIRECTION OF LIGHT
18.8 0.25
36.5 0.25
A Temporary Base Removed
DY5
DY7
P
DY9
DY10
DY8
DY6
DY4
DY2
K
3
4
5
6
10
11
12
13
1
2
9
8
DY1
DY3
0
-10
-20
-30
1
10
100
RELA
TIVE
ANODE SENSITIVITY
(dB)
SUPPLY VOLTAGE: 1750V
R
L
: 50
FREQUENCY (MHz)
SUPPLY VOLTAGE (V)
GAIN
500
700
1000
1500
2000
2500
10
8
10
7
10
6
10
5
10
4
10
3
10
2
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