Features

• Mounts directly on photomultiplier tube (PMT)
• Up to + 2 kV dc PMT bias
• Separate focus and gain controls
• Model 2007 has separate anode and dynode outputs
• Model 2007P combines tube base with low noise, charge sensitive preamplifier with HV transient protection

Description

The CANBERRA Models 2007 and 2007P are compact PM tube bases containing a high-voltage divider network to supply all necessary bias voltages for most common 10-stage PM tubes. A focus control provides for optimization of detector resolution and a gain control permits trimming the HV bias when several tubes must be matched for array setups.

Designed for compatibility with the CANBERRA Model 802 Series scintillation detectors, or equivalent, the tube base connects directly to the PMT, providing one integrally mounted assembly.

The Model 2007 includes high-voltage blocking capacitors to couple the anode and dynode signal outputs to a preamplifier, such as the CANBERRA Model 2005, or to a constant fraction discriminator, such as the CANBERRA Model 2129.

The Model 2007P includes a preamplifier which integrates the charge impulse from the anode of the PM tube to a pulse-shaping main amplifier, such as the CANBERRA Model 2020. The preamp features high-voltage transient protection, noise contribution less than 0.1 fC rms, and a rise time of less than 20 ns.

Model 2007 Functional Schematic