10Hz Spectral Lines Joschua Dilly 10Hz Spectral Lines 2 - - PowerPoint PPT Presentation

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10Hz Spectral Lines Joschua Dilly 10Hz Spectral Lines 2 - - PowerPoint PPT Presentation

Aug 01, 2023 18 likes •321 views

10Hz Spectral Lines Joschua Dilly 10Hz Spectral Lines 2 Introduction Ions 50cm Protons 30cm Protons 60/15cm flatoptics Protons at Injection Conclusion Summary 10Hz Spectral Lines 3 Introduction In the context of the luminosity problems

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10Hz Spectral Lines

Joschua Dilly

10Hz Spectral Lines 2

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Introduction Ions 50cm Protons 30cm Protons 60/15cm flatoptics Protons at Injection Conclusion Summary

10Hz Spectral Lines 3

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Introduction

In the context of the luminosity problems in IP2 during the ion runs at the end of 2018, a 10Hz modulation on the beam has been detected to cause additional problems (i.e. beam dumps). This modulation seems to originate in the IP2 triplets. In this study the spectra of some measurements was investigated to see this modulation and extract statistics about it. Furthermore, it was checked if this modulation occurs during proton runs as well.

10Hz Spectral Lines 4

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Hints

The amplitude A of the modulation is calculated as: A = Af AQ · pk2pk, where

  • Af is the amplitude of the frequency line
  • AQ is the amplitude of the tune line
  • pk2pk is the peak-to-peak value (in mm) of the focusing

quadrupoles in the arcs

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Hints

  • I added some markers for the 10Hz and the 12Hz onto the pictures.

These are only a visual aid and not in any way accurate.

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Ions 50cm

  • Date: 2018-11-03 01:38
  • FILL#: 7396
  • BeamProcess:

SQUEEZE-6.37TeV-ATS-1m-50cm-2018 ION V1@270 [END]

10Hz Spectral Lines 7

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 11 03@01 38 04 244.sdds X 0.85 · 10−3 ± 1.5 · 10−4 8.32 · 10−3 ± 2.85 · 10−3 9.00 · 10−4 ± 3.92 · 10−5 Beam1@Turn@2018 11 03@01 38 04 244.sdds X 1.15 · 10−3 ± 1.5 · 10−4 1.66 · 10−2 ± 7.44 · 10−3 1.04 · 10−3 ± 3.64 · 10−5

10Hz Spectral Lines 8

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Figure: Beam 1 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 11 03@01 38 04 244.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 4.15 · 10−3 ± 1.60 · 10−3 9.18 · 10−4 ± 1.33 · 10−5 Beam1@Turn@2018 11 03@01 38 04 244.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.31 · 10−3 ± 7.49 · 10−4 1.13 · 10−3 ± 6.72 · 10−5

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Figure: Beam 2 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 11 03@01 35 06 976.sdds X 0.85 · 10−3 ± 1.5 · 10−4 7.10 · 10−3 ± 3.42 · 10−3 8.48 · 10−4 ± 3.52 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds X 1.15 · 10−3 ± 1.5 · 10−4 2.18 · 10−2 ± 9.78 · 10−3 1.03 · 10−3 ± 1.56 · 10−5

10Hz Spectral Lines 10

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Figure: Beam 2 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 11 03@01 35 06 976.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.84 · 10−3 ± 1.12 · 10−3 7.94 · 10−4 ± 0.11 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.73 · 10−3 ± 8.67 · 10−4 1.21 · 10−3 ± 7.84 · 10−5

10Hz Spectral Lines 11

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Protons 30cm

  • Date: 2018-06-16 15:37
  • FILL#: 6811
  • BeamProcess:

RAMP PELP-SQUEEZE-6.5TeV-ATS-1m- 2018 V3 V1 MD1@1210 [END]

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 06 16@15 37 05 144.sdds X 1.00 · 10−3 ± 1.5 · 10−4 5.90 · 10−3 ± 2.61 · 10−3 1.01 · 10−3 ± 2.52 · 10−5

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Figure: Beam 1 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 06 16@15 37 05 144.sdds Y 1.00 · 10−3 ± 1.5 · 10−4 1.76 · 10−3 ± 5.08 · 10−4 9.79 · 10−4 ± 6.73 · 10−5

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Figure: Beam 2 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 06 16@15 38 07 781.sdds X 0.85 · 10−3 ± 1.5 · 10−4 2.70 · 10−3 ± 2.99 · 10−3 8.68 · 10−4 ± 7.31 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds X 1.15 · 10−3 ± 1.5 · 10−4 7.29 · 10−3 ± 3.66 · 10−3 1.04 · 10−3 ± 2.21 · 10−5

10Hz Spectral Lines 15

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Figure: Beam 2 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 06 16@15 38 07 781.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.38 · 10−3 ± 4.49 · 10−4 7.62 · 10−4 ± 2.62 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 1.95 · 10−3 ± 1.14 · 10−3 1.10 · 10−3 ± 2.82 · 10−5

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Protons 60/15cm flatoptics

  • Date: 2018-10-30 13:04
  • FILL#: 7391
  • BeamProcess:

SQUEEZE-6.5TeV-ATS-65cm-60 15cm- 2017 V1 ATSFlat@526 [END]

10Hz Spectral Lines 17

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 10 30@13 04 27 548.sdds X 0.85 · 10−3 ± 1.5 · 10−4 1.18 · 10−2 ± 4.49 · 10−3 9.00 · 10−4 ± 3.38 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds X 1.15 · 10−3 ± 1.5 · 10−4 6.91 · 10−3 ± 2.84 · 10−3 1.05 · 10−3 ± 3.72 · 10−5

10Hz Spectral Lines 18

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Figure: Beam 1 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 10 30@13 04 27 548.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.21 · 10−3 ± 1.97 · 10−3 8.00 · 10−4 ± 6.95 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.03 · 10−3 ± 1.22 · 10−3 1.20 · 10−3 ± 4.45 · 10−5

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Figure: Beam 2 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 10 30@13 04 06 462.sdds X 1.00 · 10−3 ± 1.5 · 10−4 1.28 · 10−2 ± 4.22 · 10−3 1.00 · 10−3 ± 1.85 · 10−5

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Figure: Beam 2 Frequency Spectrum of vertical BPMs.

∼10Hz ∼12Hz File Plane Window Amplitude [mm] Frequency Beam2@Turn@2018 10 30@13 04 06 462.sdds Y 1.00 · 10−3 ± 1.5 · 10−4 2.45 · 10−3 ± 6.52 · 10−4 1.00 · 10−3 ± 5.92 · 10−5

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Protons at Injection

  • Date: 2018-04-03 23:06
  • FILL#: 6504

Here the conclusion is not conclusive, as different measurements show very different spectra in this region. Hence shown are 4 measurements of Beam 1 horizontal for comparison.

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz

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Figure: Beam 1 Frequency Spectrum of horizontal BPMs.

∼10Hz ∼12Hz

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Conclusion

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Conclusion

  • Lines around 10Hz are visible in the horizontal spectrum
  • No lines can be found in the vertical spectrum
  • often two lines at around 10Hz and 12Hz
  • the 12Hz line is bigger
  • sometimes only one line around 11Hz
  • these lines are visible for Ions and Protons
  • they are more distinct for Ion optics, especially in Beam 2

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Summary

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Summary Table

File Plane Window Amplitude [mm] Frequency Beam1@Turn@2018 11 03@01 38 04 244.sdds X 0.85 · 10−3 ± 1.5 · 10−4 8.32 · 10−3 ± 2.85 · 10−3 9.00 · 10−4 ± 3.92 · 10−5 Beam1@Turn@2018 11 03@01 38 04 244.sdds X 1.15 · 10−3 ± 1.5 · 10−4 1.66 · 10−2 ± 7.44 · 10−3 1.04 · 10−3 ± 3.64 · 10−5 Beam1@Turn@2018 11 03@01 38 04 244.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 4.15 · 10−3 ± 1.60 · 10−3 9.18 · 10−4 ± 1.33 · 10−5 Beam1@Turn@2018 11 03@01 38 04 244.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.31 · 10−3 ± 7.49 · 10−4 1.13 · 10−3 ± 6.72 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds X 0.85 · 10−3 ± 1.5 · 10−4 7.10 · 10−3 ± 3.42 · 10−3 8.48 · 10−4 ± 3.52 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds X 1.15 · 10−3 ± 1.5 · 10−4 2.18 · 10−2 ± 9.78 · 10−3 1.03 · 10−3 ± 1.56 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.84 · 10−3 ± 1.12 · 10−3 7.94 · 10−4 ± 0.11 · 10−5 Beam2@Turn@2018 11 03@01 35 06 976.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.73 · 10−3 ± 8.67 · 10−4 1.21 · 10−3 ± 7.84 · 10−5 Beam1@Turn@2018 06 16@15 37 05 144.sdds X 1.00 · 10−3 ± 1.5 · 10−4 5.90 · 10−3 ± 2.61 · 10−3 1.01 · 10−3 ± 2.52 · 10−5 Beam1@Turn@2018 06 16@15 37 05 144.sdds Y 1.00 · 10−3 ± 1.5 · 10−4 1.76 · 10−3 ± 5.08 · 10−4 9.79 · 10−4 ± 6.73 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds X 0.85 · 10−3 ± 1.5 · 10−4 2.70 · 10−3 ± 2.99 · 10−3 8.68 · 10−4 ± 7.31 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds X 1.15 · 10−3 ± 1.5 · 10−4 7.29 · 10−3 ± 3.66 · 10−3 1.04 · 10−3 ± 2.21 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.38 · 10−3 ± 4.49 · 10−4 7.62 · 10−4 ± 2.62 · 10−5 Beam2@Turn@2018 06 16@15 38 07 781.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 1.95 · 10−3 ± 1.14 · 10−3 1.10 · 10−3 ± 2.82 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds X 0.85 · 10−3 ± 1.5 · 10−4 1.18 · 10−2 ± 4.49 · 10−3 9.00 · 10−4 ± 3.38 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds X 1.15 · 10−3 ± 1.5 · 10−4 6.91 · 10−3 ± 2.84 · 10−3 1.05 · 10−3 ± 3.72 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds Y 0.85 · 10−3 ± 1.5 · 10−4 2.21 · 10−3 ± 1.97 · 10−3 8.00 · 10−4 ± 6.95 · 10−5 Beam1@Turn@2018 10 30@13 04 27 548.sdds Y 1.15 · 10−3 ± 1.5 · 10−4 2.03 · 10−3 ± 1.22 · 10−3 1.20 · 10−3 ± 4.45 · 10−5 Beam2@Turn@2018 10 30@13 04 06 462.sdds X 1.00 · 10−3 ± 1.5 · 10−4 1.28 · 10−2 ± 4.22 · 10−3 1.00 · 10−3 ± 1.85 · 10−5 Beam2@Turn@2018 10 30@13 04 06 462.sdds Y 1.00 · 10−3 ± 1.5 · 10−4 2.45 · 10−3 ± 6.52 · 10−4 1.00 · 10−3 ± 5.92 · 10−5

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