recent development in hamamatsu photonics

Hamamatsu Photonics K.K. Electron Tube Division

Recent DevelopmentRecent Development in Hamamatsu Photonics in Hamamatsu Photonics

June 24 2005 at NuFact 2005 WorkshopJune 24 2005 at NuFact 2005 WorkshopHamamatsu Photonics Electron Tube Division

Yuji Yoshizawa

<Contents><Contents>

What is Hamamatsu Photonics ??What is Hamamatsu Photonics ??

Development in Vacuum DevicesDevelopment in Vacuum Devices


Hamamatsu = a name of a cityHONDA, YAMAHA and SUZUKI(famous motor cycle companies)are located in the same area.It’s an industrial city.

Where is Hamamatsu Photonics ?Where is Hamamatsu Photonics ?

TOKYO

OSAKA

Hamamatsu City

Mt.FUJI

Main IslandHamamatsu islocated betweenTOKYO and OSAKA.

Population : 600K


Hamamatsu PhotonicsHamamatsu Photonics

Established : Sept 29, 1953Net Sales : (2004) $600 MEmployees : 2,500 (As of Sept. 2004)

Electron Tube DivisionElectron Tube DivisionSolid Sate DivisionSolid Sate Division Systems DivisionSystems Division

Laser GroupLaser GroupCentral Research LabCentral Research Lab


Central Research LaboratoryCentral Research LaboratoryHuman 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 DevicesDevelopment 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)


8 inch 10 inch 13 inch

20 inch

Large Format PMT LineupLarge Format PMT Lineup

13 inch PMT is relatively shortercomparing to its diameter.


Electrodes and Metal Shield

Heating for sealing process damages dynode surface.Metal stem flange can avoid the heating problem.

Dimensional Outline of R8055 (13” PMT)Dimensional Outline of R8055 (13” PMT)

Metal Stem Flange


Modification of 20 inch PMTModification of 20 inch PMT

Present 20 inch PMT Modified 20 inch PMT

526 mm

Metal StemFlange

610 mm

25 inch Glass Sphere

too long !!

Just an IdeaNot making this


Bialkali Photocathode

new process BEST 37 %new process TYPICAL 34 %standard typical 27.5 %

0

5

10

15

20

25

30

35

40

200 300 400 500 600 700 800

Wavelength [nm]

Qua

ntum

Effi

cien

cy [%

]

Ｎ aＩ(Tl)

ＢＧＯ

New Process

Standard

High QE PhotocathodeHigh QE Photocathode

(at 360 nm)


Present Status and Future PlanPresent Status and Future Plan for High QE Photocathode for High QE Photocathode

We are checking reproducibility of this techniquewhile making 2 inch and 3 inch PMTs. (see Present)Next step is to apply it to other sizes, materials and shapes.

Present FutureApplicable Size 2 & 3 inch 1~3 inchWidnow Material Borosilicate UV and QuartzWindow Shape Flat PC, HemisphericalType of Photocathode Bialkali Multialkali, Na2KConfiguration of PMT Standard Metal Package


Flat Panel PMT / H8500 (64ch)Flat Panel PMT / H8500 (64ch)

3 x 3 array

H8500 (2 inch square)

Pixel Size : 6 x 6 mm

500 tubes were delivered from 2002for Medical, Radiation monitor and HEP.


Comparison of Effective Area RatioComparison of Effective Area RatioR1450

(19 mm dia.) R8520-C12 (1” square)

H8500(Flat Panel PMT)

R8900-C12/-M16(1” square)

Effective area ratio (EAR) = [effective area] / [external dimension]


Improvement Plan for H8500Improvement Plan for H8500

256CH type (H9500) is now available.

Present Target Date

QE at peak WL 20% 25% Apr. 2006

Anode Uniformity 1:6 max. 1:3 max. Jan. 2006

PHD (single p.e.) poor good Jan. 2006

Ruggedness poor so so Jan. 2006


Hybrid Photo-detector (HPD)Hybrid Photo-detector (HPD)

<Products>R7110U-40 (TO-8 Type)R9503U-04 (Proximity Type)Large Format Type (Development)

<Features>Good PHD and CE Good UniformityImmunity to Magnetic Field

8keV

Avalanche GainX 50

Photocathode(-8kV)

PhotoelectronOutput

Light

APD

Electron BombardmentX 1200

Combination of EB and avalanche gain

Photocathode


Sketch of 5 inch HPDSketch of 5 inch HPD

APD Target(3 mm in dia.)

180 mm

Effective Area(80 mm in dia.)

5 inch HPD was made as feasibility study for larger size.Glass bulb of 5 inch hemispherical PMT was used.

HPD : Hybrid Photo Detector

sealing tapefor protection


Next Step of Large Format HPDNext Step of Large Format HPD1. 13 inch HPD is being developed with

collaboration of the Univ. of Tokyo and JST(JAPAN SCIENCE AND TECHNOLOGY AGENCY).

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

3. Development will be finished by Mar.2010.

recent development in hamamatsu photonics

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