The CANBERRA Model 2024 Spectroscopy Amplifier
offers the modern spectroscopist the performance,
features, and flexibility demanded for high resolution,
high count rate detector systems today. Functionally,
the Model 2024 provides in a double-width NIM an
exceptional spectroscopy amplifier, a gated integrator,
a gated active baseline restorer, a pulse pileup rejector
and a live time corrector.
CANBERRAs near-Gaussian filter shaping is optimized
for improved pulse symmetry, minimum sensitivity to
variations in detector rise time, and maximum signal to
noise ratio. The improved pulse symmetry minimizes
overall pulse width for a given shaping time constant,
resulting in superior energy resolution, count rate, and
throughput performance. Unipolar shaping is achieved
with one differentiator and two active filter integrators
and offers six front panel switch selectable pulse SHAPING
time constants: 0.25, 0.5, 1, 2, 4, and 8 ės.
The 2024 includes a Gated Integrator which minimizes
spectrum broadening at the shorter amplifier shaping
time constants, which is essential for high data throughput
rates. The Gated Integrator integrates the entire unipolar signal, providing
a properly scaled linear output signal without the resolution degrading problems
normally associated with fast amplifier shaping times and long detector
charge-collection times, an effect known as ballistic deficit. This effect is most
pronounced for large volume detectors and with amplifier shaping times of
less than 1 ės. |
