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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What is Hamamatsu Photonics ??
Development in Vacuum Devices
June 24 2005 at NuFact 2005 Workshop
Hamamatsu Photonics Electron Tube Division
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 and OSAKA.
Population : 600K
Solid Sate Division
Electron Tube Division
Sept 29, 1953
Net Sales : (2004)
Employees : 2,500
(As of Sept. 2004)
Central Research Lab
Human PET with Flat Panel PMT
Clinical PET center was opened in Aug. 2003.
(Employees are taking PET scan right now.)
(1% of subjects have early cancer !!)
Large Format PMT
R8055, R3600MOD, Price Comparison
Higher Sensitivity at Blue Range
Flat Panel PMT
Combination with SSD
HPD(Hybrid Photo Detector)
13 inch PMT is relatively shorter
comparing to its diameter.
Heating for sealing process damages dynode surface.
Metal stem flange can avoid the heating problem.
Metal Stem Flange
Just an Idea
Not making this
25 inch Glass Sphere
too long !!
Present 20 inch PMT
Modified 20 inch PMT
Quantum Efficiency [%]
Wavelength [nm]High QE Photocathode
(at 360 nm)
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.
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.
(Flat Panel PMT)
(19 mm dia.)
Effective area ratio (EAR)
= [effective area] / [external dimension]
256CH type (H9500) is now available.
R7110U-40 (TO-8 Type)
R9503U-04 (Proximity Type)
Large Format Type (Development)
Good PHD and CE
Immunity to Magnetic Field
Combination of EB and avalanche gain
5 inch HPD was made as feasibility study for larger size.
Glass bulb of 5 inch hemispherical PMT was used.
(3 mm in dia.)
(80 mm in dia.)
HPD : Hybrid Photo Detector