Speaker
Description
The D-Pace ES-4 is an Allison-type emittance scanner used for transverse phase-space measurements in low-energy beam transport systems. Standard picoammeter-based acquisition is suitable for DC beam but is not well suited to short pulsed beams. A pulsed measurement system has therefore been developed around a custom charge integrator and synchronized controller architecture. The charge integrator measures collector charge within a defined gate referenced to an external beam trigger. This permits phase-space measurements at low duty cycle without requiring continuous beam current. The development included a low-noise charge-integrator front end, configurable integration and reset timing, trigger input circuitry, synchronization with scanner motion and electrode bias control, and acquisition software. The system was designed to accommodate variation in pulse width, repetition rate, beam current, and trigger timing. Initial tests demonstrate repeatable charge measurements synchronized to the beam pulse and support for pulsed emittance scans. The upgrade extends the ES-4 scanner platform to pulsed ion-source and low-energy beam applications.
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