HAMAMATSU R2368 Datasheet

PHOTOMULTIPLIER TUBE

R2368

TRANSMISSION MODE PHOTOCATHODE

Good Spatial Uniformity, Wide Angle of Radiant Input

Multialkali Photocathode

For UV-Visible Spectrophotometers and General Applications

R2386 is a 28mm (1-1/8 Inch) diameter, side-on photomultiplier tube having a trans­mission mode multialkali photocathode. The transmission mode photocathode off­ers 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".

GENERAL

Parameter Description/Value Unit

Spectral Response
Wavelength of Maximum Response

Photocathode

Material
Useful Area (Minimum)

Window Material
Dynode

Structure

Number of Stages
Base
Suitable Socket
Suitable Socket Assembly
Direct Interelectrode
Capacitance

Anode to Last Dynode

Anode to All Other Electrodes

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter Value Unit

Supply Voltage
Average Anode Current

Ambient Temperature

Anode and Cathode

Anode and Last Dynode

(NOTE 1)

185 to 850

420

Multialkali

16 × 18

UV glass

Circular-cage

9

JEDEC No. B11-88

E678-11A

E717-05

1.2

3.4

1250

250

0.1

-80 to +50

nm
nm

—

mm

—
—
—
—
—

pF
pF

V
V

mA

°C

Figure 1: Typical Spectral Response

TPMSB0148EA

100

10

QUANTUM
EFFICIENCY

CATHODE
RADIANT
SENSITIVITY

QUANTUM EFFICIENCY (%)

CATHODE RADIANT SENSITIVITY (mA/W)

1

0.1

0.01
200 400 600 800 1000

WAVELENGTH (nm)

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

Subject to local technical requirements and regulat ions, availability of products included in this promotional material may var y. P lease consult with our sales office.
Information furnished by HAMA M ATSU is believed to be reliable. However, n o 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.

(NOTE 7)

Min.

50
80

—
—
—
—
—
—

200
150

0.15

1.3 × 10
5

1.2

0.1

1.0

Max.

—
—
—

6

—
50
—
—
—

A/lm

µA/lm

—

—
nA
ns

%

%

1998 Hamamatsu Photonics K.K.

©

PHOTOMULTIPLIER TUBE R2368

Figure 2: Typical Spatial Uniformity

X-Axis Y-Axis

100

80

60

40

RELATIVE SENSITIVITY (%)

20

0

15 10 5 0 5 10 15

DISTANCE FROM CENTER OF

PHOTOCATHODE (mm)

CATHODE
ANODE

15 10 5 0 5 10 15

DISTANCE FROM CENTER OF

Y

PHOTOCATHODE (mm)

X

SPOT SIZE : 1mm DIA.
SUPPLY VOLTAGE: 1000V
WAVELENGTH : 400nm

TPMSB0149EA

Figure 3: Dimensional Outline and Basing Diagram
(Unit: mm)

29.0 ± 1.7
18MIN.

PHOTO­CATHODE

DY6

16MIN.

32.2 ± 0.5

11 PIN BASE
JEDEC No. B11-88

76MAX.

90MAX.

49.0 ± 2.5

HA COATING

DY5

DY4

3

DY3

DY2

DY1

DIRECTION OF LIGHT

6

5

4

2

1

7

11

TPMSA0026EA

DY7

10

K

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.

Electrodes
Distribution
Ratio

K: Cathode, Dy: Dynode, P: Anode

DY8

8

9

DY9

P

3. The light source is a tungsten filament lamp operated at a

4. Under the same conditions as Note 3 except that the light

5. The red/white ratio is the quotiant of the cathode current

6. The rise time is the time for the output pulse to rise from

7. Hysteresis is a temporary instability in anode current after

K Dy11Dy21Dy31Dy41Dy51Dy61Dy71Dy81Dy9

P

11

distribution temperature of 2856K. The light input is 0.01
microlumen.

input is 0.01 lumen and 100 volts are applied between the
cathode and all other electrodes connected together as an
anode.

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.

10% to 90% of the peak amplitude when the entire photo­cathode is illuminated by a delta function light pulse.

light and voltage are applied.

Warning-Personal Safety Hazards

Electrical Shock — Operating voltage

applied to this device presents shock hazard.

HAMAMATSU PHOTONICS K.K., Electoron Tube Center
314-5, Shimokanzo, Toyooka-village, Iwata-gun, Shizuoka-ken, 438-0193, Japan, Telephone: [phone], Fax: [phone]

U.S.A.:

Hamamatsu Corporation: 360 Foothill Road, P. O. Box 6910 Bridgewater. N.J. 08807-0910, U.S.A., Telephone: [phone], Fax: [phone]

Germany:

Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: [phone], Fax: [phone]

France:

Hamamatsu Photonics France S.A.R.L.: 8, Rue du Saule Trapu, Parc du Moulin de Massy, 91882 Massy Cedex, France, Telephone: [phone], Fax: [phone]

United Kingdom:
North Europe:
Italy:

Hamamatsu Photonics UK Limted: Lough Point, 2 Gladbeck Way, Windmill Hill, Enfield, Middlesex EN2 7JA, United Kingdom, Telephone: [phone], Fax: [phone]

Hamamatsu Photonics Norden AB: Färögatan 7, S-164-40 Kista Sweden, Telephone: [phone], Fax: [phone]

Hamamatsu Photonics Italia: S.R.L.: Via Della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

TPMS1043E01
JUN. 1998