C7246

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Product Specifications: Hamamatsu C7246

Category	Parameter	Specification / Description
General Information	Product Code	C7246
	Product Type	Head-On Type Photomultiplier Tube
	Description	A large, head-on PMT with a semi-transparent bialkali photocathode. Designed for high-energy physics, medical diagnostics, and other applications requiring large detection area and high gain.
Photocathode	Type	Bialkali
	Form	Semi-Transparent
	Effective Area	Diameter: 51 mm (2 inches)
	Window Material	Borosilicate Glass
Spectral Response	Peak Wavelength	~420 nm
	Response Range	300 nm to 650 nm
Dynode System	Structure	Venetian Blind (10 stages)
	Material	Cu-Be
Gain	Typical Value	2 x 10<sup>6</sup> (at 1000 V)
	Maximum	1 x 10<sup>8</sup> (at 1500 V)
Voltage	Operating Range (Anode to Cathode)	-1000 V to -1500 V DC
	Polarity	Negative High Voltage (Cathode)
	Recommended Divider Ratio	Recommended voltage divider circuit is required. (e.g., Hamamatsu E1198-XX series)
Current	Average Anode Current	100 μA (max)
	Average Output Current (Linear)	10 mA (max, for pulsed operation)
Performance	Dark Current (Typical)	10 nA (at 1000 V, room temp)
	Anode Luminous Sensitivity	50 μA/lm (Typ., at 2856 K)
	Cathode Luminous Sensitivity	70 μA/lm (Typ., at 2856 K)
	Rise Time	14 ns
	TTS (Transit Time Spread)	5.0 ns
Mechanical	Housing	Head-on type with stem at base
	Base	No integrated socket; requires external socket (e.g., Hamamatsu E1198-07)
	Overall Length	Approx. 135 mm
	Bulb Diameter	Approx. 58 mm
Environmental	Operating Temperature	-20 °C to +50 °C
	Storage Temperature	-20 °C to +60 °C
	Magnetic Shielding	Requires a mu-metal magnetic shield (e.g., Hamamatsu A50-XX) for stable operation.
Applications		High-Energy Physics Experiments, Positron Emission Tomography (PET), Low-level Radiation Detection, LIDAR.