HAMAMATSU R2078 Datasheet

PHOTOMULTIPLIER TUBE

R2078

Extremely Improved Solar Blind Photocathode for Aerospace and

General Photometric Applications, 25mm (1 Inch) Diameter,

Ruggedized Low Profile Tube, Cs-Te Photocathode, 10-Stage, Head-on

FEATURES

High Quantum Efficiency ..................................... 14% at 254nm Typ.

Ruggedized, Low Profile Structure ..................... 20g's vibration

43mm in bulb length

GENERAL

Parameter Description/Value Unit

Spectral Response
Wavelength of Maximum Response

Photocathode
Window Material
Dynode
Base (temporary)

Suitable Socket

Material
Minimum Useful Diameter

Structure
Number of Stages

12-pin base JEDEC No. B12-13

160 to 320

240

Cs-Te

21

Fused silica

Circular cage

10

E678-12A (supplied)

nm
nm

—

mm dia.

—
—
—
—
—

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter Value Unit

Supply Voltage
Average Anode Current

Between Anode and Cathode
Between Anode and Last Dynode

CHARACTERISTICS (at 25°C)

Parameter Min. Unit

Cathode Sensitivity

Anode Sensitivity

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

Time Response

Radiant at 254nm
Radiant at 254nm
Radiant at 365nm
Radiant at 550nm

Anode Pulse Rise Time
Electron Transit Time

20

2.0 × 10
—
—

1.0 × 10
—
—
—

VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE

Electrodes
Ratio

Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode

K Dy13Dy21Dy31Dy41Dy51Dy61Dy71Dy81Dy9

111

3

5

Dy10 P

2000

300

0.015

Typ. Max.

29

1.5 × 10

1.6 × 10

5.0 × 10

4

1.5

-2
5

15

1.5
14

—
—
—
—
—

100

—
—

Vdc
Vdc

mA

mA/W

A/W
A/W
A/W

—

pA

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, 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.

1998 Hamamatsu Photonics K.K.

©

PHOTOMULTIPLIER TUBE R2078

Figure 1: Typical Spectral Response

TPMHB0559EA

2

10

1

10

CATHODE
RADIANT
SENSITIVITY

QUANTUM
EFFICIENCY

WAVELENGTH (nm)

QUANTUM EFFICIENCY (%)

PHOTOCATHODE RADIANT SENSITIVITY (mA/W)

0

10

-1

10

-2

10

-3

10

-4

10

-5

10

-6

10

200 700600500400300

Figure 2: Typical Gain Characteristics

TPMHB0560EA

8

10

7

10

6

10

5

10

GAIN

4

10

3

10

2

10

500 700 1000 1500 2000 3000

SUPPLY VOLTAGE (V)

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

FACEPLATE

PHOTOCATHODE

SEMIFLEXIBLE
LEADS

12 PIN BASE
JEDEC
No. B12-43

25.4 ± 0.8
21MIN.

43.0 ± 1.5

13MAX.

50MIN.

37.3 ± 0.5

Temporary Base Removed

DY5

DY3

DY1

DY7

DY9

5

4

3

2

8

6

17
K

Bottom View

DY10

P

6

7

5

2

1

12

DY7

DY5

DY9

4

3

DY3

DY1

P

DY10

10

11

12

13

14

DY2

DY8

8

9

10

11

DY2

K

DY8

DY6

DY4

DY6

DY4

TPMHA0438EA

2- 3.2

Socket

(E678-12A)

47

40
17

34

5

15

8

TACCA0009EA

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]

TPMH1226E01
AUG. 1998