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Recent Development in Hamamatsu Photonics. <Contents> What is Hamamatsu Photonics ?? Development in Vacuum Devices. June 24 2005 at NuFact 2005 Workshop Hamamatsu Photonics Electron Tube Division Yuji Yoshizawa. Where is Hamamatsu Photonics ?.

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Recent development in hamamatsu photonics
Recent Development in Hamamatsu Photonics

<Contents>

What is Hamamatsu Photonics ??

Development in Vacuum Devices

June 24 2005 at NuFact 2005 Workshop

Hamamatsu Photonics Electron Tube Division

Yuji Yoshizawa


Where is hamamatsu photonics
Where is Hamamatsu Photonics ?

Hamamatsu = a name of a city

HONDA, YAMAHA and SUZUKI

(famous motor cycle companies)

are located in the same area.

It’s an industrial city.

TOKYO

Main Island

Hamamatsu is

located between

TOKYO and OSAKA.

OSAKA

Mt.FUJI

Hamamatsu City

Population : 600K


Hamamatsu photonics
Hamamatsu Photonics

Solid Sate Division

Electron Tube Division

Systems Division

Established :

Sept 29, 1953

Net Sales : (2004)

$600 M

Employees : 2,500

(As of Sept. 2004)

Central Research Lab

Laser Group


Central research laboratory
Central Research Laboratory

Human PET with Flat Panel PMT

Animal PET

Clinical PET center was opened in Aug. 2003.

(Employees are taking PET scan right now.)

(1% of subjects have early cancer !!)


Development in vacuum devices
Development in Vacuum Devices

Large Format PMT

R8055, R3600MOD, Price Comparison

Photocathode

Higher Sensitivity at Blue Range

Unique Shape

Flat Panel PMT

Combination with SSD

HPD(Hybrid Photo Detector)


Large format pmt lineup
Large Format PMT Lineup

20 inch

13 inch PMT is relatively shorter

comparing to its diameter.

13 inch

8 inch

10 inch


Dimensional outline of r8055 13 pmt
Dimensional Outline of R8055 (13” PMT)

Electrodes and

Metal Shield

Heating for sealing process damages dynode surface.

Metal stem flange can avoid the heating problem.

Metal Stem Flange


Modification of 20 inch pmt
Modification of 20 inch PMT

Just an Idea

Not making this

25 inch Glass Sphere

526 mm

too long !!

Metal Stem

Flange

610 mm

Present 20 inch PMT

Modified 20 inch PMT


High qe photocathode

40

New Process

35

30

25

Standard

Quantum Efficiency [%]

20

15

10

5

BGO

NaI(Tl)

0

300

400

500

600

700

800

200

Wavelength [nm]

High QE Photocathode

Bialkali Photocathode

(at 360 nm)


Present status and future plan for high qe photocathode
Present Status and Future Plan for High QE Photocathode

We are checking reproducibility of this technique

while making 2 inch and 3 inch PMTs. (see Present)

Next step is to apply it to other sizes, materials and shapes.


Flat panel pmt h8500 64ch
Flat Panel PMT / H8500 (64ch)

H8500 (2 inch square)

3 x 3 array

Pixel Size : 6 x 6 mm

500 tubes were delivered from 2002

for Medical, Radiation monitor and HEP.


Comparison of effective area ratio
Comparison of Effective Area Ratio

H8500

(Flat Panel PMT)

R1450

(19 mm dia.)

R8520-C12

(1” square)

R8900-C12/-M16

(1” square)

Effective area ratio (EAR)

= [effective area] / [external dimension]


Improvement plan for h8500
Improvement Plan for H8500

256CH type (H9500) is now available.


Hybrid photo detector hpd
Hybrid Photo-detector (HPD)

Photocathode

(-8kV)

Photocathode

APD

Output

Photoelectron

Light

<Products>

R7110U-40 (TO-8 Type)

R9503U-04 (Proximity Type)

Large Format Type (Development)

<Features>

Good PHD and CE

Good Uniformity

Immunity to Magnetic Field

8keV

Electron Bombardment

X 1200

Avalanche Gain

X 50

Combination of EB and avalanche gain


Sketch of 5 inch hpd
Sketch of 5 inch HPD

5 inch HPD was made as feasibility study for larger size.

Glass bulb of 5 inch hemispherical PMT was used.

APD Target

(3 mm in dia.)

Effective Area

(80 mm in dia.)

sealing tape

for protection

180 mm

HPD : Hybrid Photo Detector


Next step of large format hpd
Next Step of Large Format HPD

  • 13 inch HPD is being developed with collaboration of the Univ. of Tokyo and JST(JAPAN SCIENCE AND TECHNOLOGY AGENCY).

  • Working prototype would be made in 2 years (by mar.2007).

  • Development will be finished by Mar.2010.


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