Recent Development in Hamamatsu Photonics

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Recent Development in Hamamatsu Photonics
ltContentsgt What is
Hamamatsu Photonics ?? Development in Vacuum
Devices
June 24 2005 at NuFact 2005 Workshop Hamamatsu
Photonics Electron Tube Division Yuji Yoshizawa
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Where is Hamamatsu Photonics ?
Hamamatsu a name of a city HONDA, YAMAHA and
SUZUKI (famous motor cycle companies) are located
in the same area. Its an industrial city.
TOKYO
Main Island
Hamamatsu is located between TOKYO and OSAKA.
OSAKA
Mt.FUJI
Hamamatsu City
Population 600K
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Hamamatsu Photonics
Electron Tube Division
Solid Sate Division
Systems Division
Established Sept 29, 1953 Net Sales
(2004) 600 M Employees 2,500
(As of Sept. 2004)
Laser Group
Central Research Lab
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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 !!)
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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)

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Large Format PMT Lineup
20 inch
13 inch PMT is relatively shorter comparing to
its diameter.
13 inch
8 inch
10 inch
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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
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Modification of 20 inch PMT
25 inch Glass Sphere
Just an Idea Not making this
526 mm
too long !!
Metal Stem Flange
610 mm
Present 20 inch PMT
Modified 20 inch PMT
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High QE Photocathode
Bialkali Photocathode
(at 360 nm)
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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.
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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.
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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
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Improvement Plan for H8500
256CH type (H9500) is now available.
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Hybrid Photo-detector (HPD)
Photocathode (-8kV)
Photocathode
APD
Output
Photoelectron
Light

• ltProductsgt
• R7110U-40 (TO-8 Type)
• R9503U-04 (Proximity Type)
• Large Format Type (Development)
• ltFeaturesgt
• Good PHD and CE
• Good Uniformity
• Immunity to Magnetic Field

8keV
Avalanche Gain X 50
Electron Bombardment X 1200
Combination of EB and avalanche gain
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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
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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.