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Data Analysis

Data Analysis. Edwin Chng. Contents. Decay Solenoid Electron Peak Muon Peak Slab Hits Appendix. Slide 2. Decay Solenoid (DS). DS current reference at 669 Amps(run 2200) DS current varied from -15% to +20%

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Data Analysis

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  1. Data Analysis Edwin Chng

  2. Contents • Decay Solenoid • Electron Peak • Muon Peak • Slab Hits • Appendix Slide 2

  3. Decay Solenoid (DS) • DS current reference at 669 Amps(run 2200) • DS current varied from -15% to +20% • TofTree and TofTrace ran on data to extract mean of x,y and the spread of the beam (σ) Slide 3

  4. Slide 4

  5. Results Reference Slide 5

  6. Reference Slide 6

  7. Reference Reference Slide 7

  8. Electron Peak • Value of electron peak investigated for runs 1592-2895 • Value expected to stay constant as electrons are relativistic • Missing data given in appendix • TofTree code modified and ran on data • Electron data fitted with Gaussian curve (see graph) Slide 8

  9. Slide 9

  10. Electron Peak • Data extracted include mean with associated error and the number of the electrons • Data with 10 counts or less eliminated from graph and also bad fits Slide 10

  11. Results Mean 25.48 S.D. 0.04 Slide 11

  12. Slide 12

  13. Backward calculation showed the electrons to have a velocity larger than speed of light Distance – 7764 mm Average time – 25.48 ns Speed – 1.017 c Slide 13

  14. Muon Peak • Data analysed for reference runs (see appendix for list of reference run numbers) • TofTree ran on data with mean, count and most probable extracted • No fitting was done in this case because of the lack of a suitable theoretical fit Slide 14

  15. Results Slide 15

  16. Results Positive Polarity Negative Polarity Slide 16

  17. Negative Polarity Positive Polarity Slide 17

  18. Mean 28.29 S.D. 0.07 Slide 18

  19. Slide 19

  20. Slab hits • Data analysed for reference runs • Data extracted for successful slab hits (green) for Tof0(10slabs), Tof1(7slabs), Tof2(10slabs) Slide 20

  21. Results Slide 21

  22. Slide 22

  23. Slide 23

  24. Slide 24

  25. Slide 25

  26. Slide 26

  27. Appendix • Missing data : 1600 – 1623, 1653, 1760, 1763 – 1765, 1767 – 1774, 1776 – 1778, 1781 – 1783, 1787, 1791 – 1796 , 1801 – 1804, 1828, 1840 – 1841, 1864 ,1866 1869, 1872 – 1873, 1875, 1877 – 1878, 1880 – 1881, 1889 – 1896, 1899 – 1900, 1906, 1908, 1916 – 1921, 1925, 1927, 1932 – 1933, 1936, 1938 – 1941, 1944, 1949, 1952, 1956, 1960, 1962, 1970 – 1971, 2046, 2049, 2086, 2088, 2090, 2239, 2323 – 2340, 2405 – 2410, 2589 • Reference runs: 2204 – 2211, 2223, 2238, 2241, 2243-2245, 2253-2256, 2272 – 2276, 2303, 2396, 2398, 2423, 2444, 2446, 2462, 2466, 2482, 2498 – 2502, 2514, 2525, 2534, 2538 – 2539, 2553 – 2555, 2561 – 2562, 2640, 2702, 2726, 2734, 2743, 2767, 2803, 2846, 2873 Slide 27

  28. Thank You

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