1. Recent Progress in Large Format PMTs
Apr at VLVnT08 Workshop
Hamamatsu Photonics
Electron Tube Division

2. Contents in this talk About Hamamatsu Photonics
High QE Bialkali Photocathode
New Development of 12 inch PMT
13 inch HPD(Hybrid Photo Detector)
Summary

3. Hamamatsu Photonics K.K.
NanoZoomer
Solid Sate Division
Electron Tube Division
Systems Division
Established :
Sept 29, 1953
Net Sales : (FY 2007)
Yen 96B ($950M)
Employees : 4,000
(Group) (As of Sept. 07)
Research Laboratories
Laser Group

4. Location of Hamamatsu Photonics
ETD
CRL
KRL
SYS
SSD
Hamamatsu
Station
Hamamatsu City
Population : 820K
(as of Apr.08)
HONDA, YAMAHA and SUZUKI
(famous motorcycle companies)
have their factories in the same area.

5. Picture of ETD (bird’s-eye view)
Cafeteria
& General
MCP
Image
Sensor
PMT
PMT
PMT
X-ray
Sales &
General
Parking
Lamp
Parking
Parking

6. High QE Bialkali Photocathode
Announced at IEEE conference in Oct.06.
Based on continuous effort for long time

7. Bialkali QE Comparison
UBA:43%
Example Data for
UBA : R
SBA : R
STD : R7600
x1.6
x1.3
SBA:35%
STD:26%

8. Definition of SBA/UBA R7600/R8900 1 inch Square Metal Package R9880
New TO-8 type
Metal Package

9. R7600 & R8900 & R9880 (Metal Package PMTs)
Metal Channel Dynodes
Micro processing technology
R9880
<Cross-section>
R7600
Array of Linear
Focused Dynode
Features
Compact, Fast Time Response
Position Sensitive
Immunity to magnetic field
1 mm
1 mm

10. R7600 & R8900 Various Anode Types
Difference of R7600 & R8900
R7600
R8900
4 channels
M4 (2x2)
16 channels
M16 (4x4) Y
Focusing
MCD X
Proximity
64 channels
M64 (8x8)
Cross-Plate
C12 (6+6)
Multi-anode
Fiber Coupling
Imaging
RICH
(R7600-M64 only)
(R8900-C12 only)

11. Latest Data of R7600-200 (UBA) 41%~45% <<Specification>>
Example data with 10 tubes
41%~45%
<<Specification>>
Typical : 43 %
Minimum : 38 %
at peak Wavelength

12. Conventional PMTs with SBAR
(2 inch)
Applications:
Radiation detection
Gamma Camera
Radiation Probe R
(3 inch)
For Better
Energy Resolution R
(1-1/8 inch)

13. Large Format PMTs 20 inch For Better Detection Efficiency 13 inch
13 inch PMT is very low profile
despite its diameter.
R3600
13 inch
10 inch
8 inch
R8055
R7081
R5912
Applications:
Neutrino Experiment
Trial for High QE

14. Example QE data R7081 (10 inch)
High QE Type
Champion Data
35.5 % at 380 nm
Samples:47 pcs
Average:32.9%
Standard
26% at 380 nm

15. Example QE data R7081 (10 inch)

16. Cathode Uniformity of R7081

17. Development of 12 inch PMT
Glass Sphere
Some space
for divider

18. Estimation for Performance

19. Developmental Plan of 12 inch PMT
Some sample tubes would be available in Nov
We need 6 months for preparation of mass-production version.

20. HPD Compared with PMT <HPD> <PMT> Total gain: ~1x105
AD (Avalanche Diode)
EB GAIN : 1000~2000
AD GAIN : 30~100
DYNODE GAIN : 3~10
GAIN = 4x4x4x…x4x4x4
Total gain: ~1x105
Total gain: ~1x106

21. Pulse Height Distribution
<HPD>
<PMT>
K-APD = 12KV
1pe
1pe
2pe
2pe
3pe
4pe
5pe
Prime Feature : Good Pulse Height Distribution

22. Large Format HPD AD Target : 5mm f TTS(FWHM) : 440 ps
F330mm
13 inches
AD Target : 5mm f
TTS(FWHM) : 440 ps
Development will be
finished by Mar.2010
<Collaboration>
The Univ. of Tokyo and JST (JAPAN SCIENCE
AND TECHNOLOGY AGENCY)

23. EB Gain and Avalanche Gain
Total : 2.3e+05
13 inch HPD

24. Summary QE (10 inch and 8 inch) is getting improved.
12 inch PMTs would be available in Nov.2008.
13 inch HPD would be available in Apr.2010.

25. Thank you for your attention !!
Any Questions ?

27. Hamamatsu Sales Office Map
Europe
JAPAN
USA
Southeast
Asia
(Subsidiaries)
(Subsidiaries)
(Representatives)
Japanese Standard MAP