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Verifying TOF and LPS in Alice

Verifying TOF and LPS in Alice. Josh Briegal 21/08/12. Aims. Verify the longitudinal compression scheme in ALICE Confirm Peter’s ELEGANT model is correct Re create data taken by Peter and Frank in shifts #3058 (AR1-BPM06) and #3076 (ST2-BPM04). LC1GS Varied AR1-QUAD01/04 Varied #3058.

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Verifying TOF and LPS in Alice

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  1. Verifying TOF and LPS in Alice Josh Briegal 21/08/12

  2. Aims • Verify the longitudinal compression scheme in ALICE • Confirm Peter’s ELEGANT model is correct • Re create data taken by Peter and Frank in shifts #3058 (AR1-BPM06) and #3076 (ST2-BPM04)

  3. LC1GS Varied AR1-QUAD01/04 Varied #3058 AR1-BPM06 Before Chicane Shifted Parabola ELEGANT consistently steeper Confirms isochronous condition (~2.16A QUAD01/04)

  4. LC1GS Varied AR1-QUAD01/04 Varied #3076 ST2-BPM04 Post Chicane

  5. LC1GS Varied AR1-SEXT01 Varied #3058 AR1-BPM06 Before Chicane

  6. LC1GS Varied AR1-SEXT01 Varied #3076 ST2-BPM04 Post Chicane Note: Frank used 2.23A on AR1-QUAD01/04 not 2.19

  7. Further Investigations • Vary LC2GS instead of LC1 (Frank shift #3056) • Vary AR1-SEXT02 instead of AR1-SEXT01

  8. LPS plots • Tracking LPS as beam goes through the chicane • Compare for different sextupole and quadrupole strengths at nominal energy • Comparing LPS based on different beam distributions for different setups (THZ and FEL) • All at nominal energy (~26MeV)

  9. Before Chicane AR1-SEXT01 varied Black 0A Red 3A Blue 9A

  10. Current Histogram Before Chicane AR1-SEXT01 varied Black 0A Red 3A Blue 9A

  11. Post Chicane AR1-SEXT01 varied Black 0A Red 3A Blue 9A

  12. Current Histogram Post Chicane AR1-SEXT01 varied Black 0A Red 3A Blue 9A

  13. Before Chicane AR1-QUAD01/04 varied Red 2.11A Blue 2.15A Black 2.19A Green 2.23A

  14. Current Histogram Before Chicane AR1-QUAD01/04 varied Red 2.11A Blue 2.15A Black 2.19A Green 2.23A

  15. Post Chicane AR1-QUAD01/04 varied Red 2.11A Blue 2.15A Black 2.19A Green 2.23A

  16. Current Histogram Post Chicane AR1-QUAD01/04 varied Red 2.11A Blue 2.15A Black 2.19A Green 2.23A

  17. THZ setup Before Chicane

  18. THZ setup Post Chicane

  19. FEL Black THZ Red Before Chicane

  20. Current histogram FEL Black THZ Red Before Chicane

  21. FEL Black THZ Red Post Chicane

  22. Current histogram FEL Black THZ Red Post Chicane

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