rf measurements and tuning of the 1-m-long 750 MHz radio-frequency quadrupole for artwork analysis

rf measurements and tuning of the 1-m-long 750 MHz radio-frequency quadrupole for artwork analysis

The 750 MHz PIXE-RFQ (radio-frequency quadrupole), developed and built at CERN, provides 2 MeV protons over a length of one meter for proton-induced X-ray emission analysis (PIXE) of cultural heritage artwork. In this paper, we report low-power rf measurements and tuning of the PIXE-RFQ, which have...

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Veröffentlicht in:Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment Accelerators, spectrometers, detectors and associated equipment, 2021-09, Vol.1011, p.165564, Article 165564
Hauptverfasser: Pommerenke, Hermann W., van Rienen, Ursula, Grudiev, Alexej
Format: Artikel
Sprache:eng
Schlagworte:
Radio-frequency quadrupole
rf measurements
RFQ
Tuning
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Zusammenfassung:The 750 MHz PIXE-RFQ (radio-frequency quadrupole), developed and built at CERN, provides 2 MeV protons over a length of one meter for proton-induced X-ray emission analysis (PIXE) of cultural heritage artwork. In this paper, we report low-power rf measurements and tuning of the PIXE-RFQ, which have been completed mid-2020. Using a novel algorithm based on direct measurements of the response matrix, field and frequency could be tuned at the same time in only two steps to satisfying accuracy. Additionally, we report measurements of single modules, quality factors, and coupling strength. In all cases, very good agreement between rf measurement and design values was observed.
ISSN:0168-9002
1872-9576
DOI:10.1016/j.nima.2021.165564