HAMAMATSU R2496 Datasheet

PHOTOMULTIPLIER TUBE

R2496

For Positron CT Scanner Using BaF2 Scintillator

10mm (3/8 Inch) Diameter, 8-Stage, Head-On, Bialkali Photocathode

FEATURES

Coincidence Resolving Time
with BaF
Fast Time Response

Transit Time Spread (FWHM) .............................................................................................................................................. 0.6ns

Quantum Efficiency at 225nm ................................................................................................................................................... 18%

GENERAL

Spectral Response
Wavelength of Maximum Response

Photocathode
Window Material
Dynode
Direct Interelectrode

Capacitances
Base
Weight
Suitable Socket

2-BaF2/

22

Na ........................................................................................................................................................... 0.45ns

Parameter Description/Value Unit

nm
nm

—

mm dia.

—
—

—
pF
pF

—

g

—

Material
Minimum Useful Area

Structure
Number of Stages
Anode to Last Dynode
Anode to All Other Electrodes

160 to 650

420

Bialkali

8

Fused silica

Linear focused

8

0.7

2.0

11-pin glass base

Approx. 5

E678-11N (supplied)

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter Value Unit

Supply Voltage
Average Anode Current
Ambient Temperature

Between Anode and Cathode

CHARACTERISTICS (at 25°C)

Parameter Min. Unit

Luminous (2856K)

Cathode Sensitivity

Anode Sensitivity
Gain

Anode Dark Current (after 30 min. storage in darkness)
Time Response

Radiant at 420nm
Blue
Luminous (2856K)
Radiant at 420nm

Anode Pulse Rise Time
Electron Transit Time

60
—
—
30
—
—
—
—
—

VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE

Electrodes
Distribution Ratio

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

K Dy13Dy2

1.5

1.5

Dy3

Dy41Dy51Dy61Dy71Dy81P

1

1500

0.03

-80 to +50

Typ. Max.

95
76

9.5

100

8.0 × 10

1.1 × 10

4
6

2

0.7

9.0

—
—
—
—
—
—
50
—
—

Vdc

mA

°C

µA/lm
mA/W

µA/lm-b

A/lm
A/W

—

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 R2496

Figure 1: Typical Spectral Response

TPMHB0566EA

100

10

QUANTUM
EFFICIENCY

WAVELENGTH (nm)

QUANTUM EFFICIENCY (%)

CATHODE RADIANT SENSITIVITY (mA/W)

0.1

0.01

1

200 600 800400

CATHODE
RADIANT
SENSITIVITY

Figure 2: Typical Gain Characteristics

TPMHB0567EA

7

10

6

10

5

10

GAIN

4

10

3

10

500 1000700 1500 2000

SUPPLY VOLTAGE (V)

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

10.5 ± 0.5

FACEPLATE

PHOTOCATHODE

11 PIN BASE

8MIN.

10MAX. 45.0 ± 1.5

DY5

DY3

DY1

DY7

5

4

3

2

IC

SHORT PIN

P

DY8

6

7

10

11

1

K

8

9

DY2

Socket

(E678-11N)

4.3

DY6

DY4

10.5

9.5

3

11

TPMHA0442EA

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]

TPMH1229E01
SEPT. 1998