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Preliminary RF and Beam Data Analysis

Preliminary RF and Beam Data Analysis. Jeff Dooling June 26, 2007. Summary of rf and beam data. ISIS IPNS. ISIS RF Data 2 cavities —courtesy I. Gardner (Nov 2006). ISIS SH rf and d near injection (2 cavities). SH RF status. September 2005 (no SH RF) Injected charge: 2.33x10 13 protons

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Preliminary RF and Beam Data Analysis

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  1. Preliminary RF and Beam Data Analysis Jeff Dooling June 26, 2007

  2. Summary of rf and beam data • ISIS • IPNS

  3. ISIS RF Data2 cavities—courtesy I. Gardner (Nov 2006)

  4. ISIS SH rf and d near injection(2 cavities)

  5. SH RF status • September 2005 (no SH RF) Injected charge: 2.33x1013 protons Captured charge: 2.07x1013 protons Extracted charge: 2.04x1013 protons • Dec 2006 (SH rf Superperiods 4 and 5) Injected charge: 2.78x1013 protons Captured charge: 2.54x1013 protons Extracted charge: 2.47x1013 protons

  6. FFT analysis of ISIS single-ended BPM data (shortly injection)—fundamental RF only fo = 1.388 MHz

  7. FFT analysis of ISIS single-ended BPM data (near extraction)—fund. RF only fo = 3.055 MHz

  8. Results • Capture efficiency improved substantially • Total current to extraction up by 10% • Would like to look at pulse shape evolution • Are possible instabilities an issue later

  9. IPNS RCS data • Ferrite limits use to the first 4 ms • Use always provides an improvement in current • Other stability issues in the machine?

  10. RCS RF data

  11. Preliminary look at bunch shape with phase

  12. Simple waveform analysis

  13. Vertical instability later Unstable bunches are shortened

  14. Prelimary IPNS results • Good response with SH angle • Voltage ratio d approximately 0.55 • Bigger fish to fry—instability

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