HAMAMATSU R2248 Datasheet

10mm × 10mm Square Envelope, Head-On Type

GENERAL

Parameter Description/Value Unit

Spectral Response
Wavelength of Maximum Response

Photocathode
Window Material
Dynode
Base

Weight
Suitable Socket

Material
Minimum Useful Area

Structure
Number of Stages

PHOTOMULTIPLIER TUBE

R2248

8-Stage, Bialkali Photocathode

300 to 650

Borosilicate glass

Linear focused

11-pin glass base

Approx. 4.5

E678-11N (supplied)

420

Bialkali

8 × 8

8

nm
nm

—

mm

—
—
—
—

g

—

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter Value Unit

Supply Voltage
Average Anode Current

Ambient Temperature

Between Anode and Cathode
Between Anode and Last Dynode

CHARACTERISTICS (at 25°C)

Parameter Min. Unit

Luminous (2856K)

Cathode Sensitivity

Anode Sensitivity
Gain
Anode Dark Current (after 30min. storage in darkness)

Time Response

Radiant at 420nm
Blue (CS 5-58 filter)
Luminous (2856K)

Anode Pulse Rise Time
Electron Transit Time

60
—
—
30
—
—
—

VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE

Electrodes
Ratio

Supply Voltage: 1250Vdc, K: Cathode, Dy: Dynode, P: Anode

K Dy12Dy22Dy31Dy41Dy51Dy61Dy71Dy81P

1

1500

250

0.03

-80 to +50

Typ. Max.

95
76

9.5

100

1.1 × 10

6

1

0.9
9

—
—
—
—
—
50
—
—

Vdc
Vdc

mA

°C

µA/lm
mA/W

µA/lm-b

A/lm

—

nA

ns
ns

Subject to local technical requirements and regulat ions, availability of products included in this promotional material may va r y. Please consult with our sales office.
Information furnished by HAMA M ATSU 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.

©

PHOTOMULTIPLIER TUBE R2248

Figure 1: Typical Spectral Response

TPMHB0543EA

100

10

QUANTUM
EFFICIENCY

1

QUANTUM EFFICIENCY (%)

0.1

CATHODE RADIANT SENSITIVITY (mA/W)

0.01
200 600 800400

WAVELENGTH (nm)

CATHODE
RADIANT
SENSITIVITY

Figure 2: Typical Gain Characteristics

TPMHB0565EA

8

10

7

10

6

10

5

10

GAIN

4

10

3

10

2

10

500 1000700 1500 2000

SUPPLY VOLTAGE (V)

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

9.8 ± 0.4

FACEPLATE

PHOTOCATHODE

11 PIN BASE

8MIN.

8MIN.

9.8 ± 0.4

45.0 ± 1.5

10MAX.

DY5

DY3

DY1

DY7

5

4

3

2

IC

SHORT PIN

P

DY8

6

7

11

1

K

8

10

DY6

9

DY4

DY2

TPMHA0098EA

Socket

(E678-11N)

4.3

10.5

9.5

3

11

3

9.5

TACCA0043EA

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 Limited: 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.: Strada della Moia, 1/E, 20020 Arese, (Milano), Italy, Telephone: [phone], Fax: [phone]

TPMH1228E01
SEPT. 1998