Speaker
Description
Non-invasive monitoring of nA-level currents in slowly extracted hadron beams is a challenging diagnostic task. Invasive instruments such as ionization chambers and secondary emission monitors (SEMs) are commonly employed for monitoring of such intensities. For low-intensity beam monitoring in storage rings like CRYRING and ELENA, capacitive pick-ups equipped with charge amplifiers have proven effective. In rings, beam power is concentrated at the revolution and betatron frequencies, which enables filtering techniques for both intensity and position measurements. For slowly extracted beams, we propose introducing a controlled modulation to the spill in order to concentrate the signal power at a specific frequency. This modulated signal can then be demodulated at the same frequency to extract intensity or position information. First proof of concept measurements of such a technique is presented in this contribution.
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