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Some MKI observations during fill 1794 -1859 MD 25ns Wk43

Some MKI observations during fill 1794 -1859 MD 25ns Wk43. V. Baglin (1/11/11 ). CERN TE-VSC, Geneva. 1 . 2. MKI LSS2. MKI LSS8. Fill 1794. Fill 1794 : 50ns_1308b_108bpi_13inj_scrub At 450 GeV. Fill 1794 – MKI LSS2. Fill 1794 : 50ns_1308b_108bpi_13inj_scrub 450 GeV

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Some MKI observations during fill 1794 -1859 MD 25ns Wk43

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  1. Some MKI observations during fill 1794 -1859 MD 25ns Wk43 V. Baglin (1/11/11) CERN TE-VSC, Geneva 1. 2.

  2. MKI LSS2

  3. MKI LSS8

  4. Fill 1794 • Fill 1794 : 50ns_1308b_108bpi_13inj_scrub • At 450 GeV

  5. Fill 1794 – MKI LSS2 • Fill 1794 : 50ns_1308b_108bpi_13inj_scrub • 450 GeV • Solenoids ON • MKI : 3 -> 5 10-10 mbar

  6. Fill 1794 – MKI LSS2 - intermodule • Fill 1794 : 50ns_1308b_108bpi_13inj_scrub • 450 GeV • Solenoids ON • Pressure blue beam larger than red beam • Pressure increases from Q5L2 to Q4L2 • Blue : 4 -> 6 10-9 mbar • Red : 4 -> 11 10-10 mbar

  7. Fill 1794 – MKI LSS8 • Fill 1794 : 50ns_1308b_108bpi_13inj_scrub • 450 GeV • Solenoids ON • MKI : 5 10-10 mbar

  8. Fill 1794 – MKI LSS8 - intermodule • Fill 1794 : 50ns_1308b_108bpi_13inj_scrub • 450 GeV • Solenoids ON • No strong difference between two beams • Blue : 6 -> 24 10-10 mbar • Red : 1 -> 2 10-9 mbar

  9. Fill 1859 • Fill 1859 : 50ns_1092b+1small_1042_35_1008_108bpi

  10. MKI2 - Tank • 50ns_1092b+1small_1042_35_1008_108bpi • With B2 and B1+B2, highest pressure in tank MKI close to Q5L2 • Pressure is lower than for MKI8 case

  11. MKI2 – intermodules line B1 • 50ns_1092b+1small_1042_35_1008_108bpi • With B2, almost no pressure increase, whereas it increase with B1+B2

  12. MKI2 – intermodules line B2 • 50ns_1092b+1small_1042_35_1008_108bpi • With B2, almost no pressure increase, whereas it increase with B1+B2 • The copper chamber does not produce significant pressure increase due to electron cloud

  13. MKI8 - Tank • 50ns_1092b+1small_1042_35_1008_108bpi • With B2 and B1+B2, high pressure in tank MKI

  14. MKI8 – intermodules line B2 • 50ns_1092b+1small_1042_35_1008_108bpi • With B2, high pressure in inter-module at extremity of tank with highest pressure • The highest pressure in on the right of the tank • Pressure ratio at extremities between 2 to 5

  15. MKI8 – intermodules line B1 • 50ns_1092b+1small_1042_35_1008_108bpi • With B2, high pressure in inter-module at extremity of tank with highest pressure • The highest pressure in on the right of the tank • The pressure is lower than inter-module B2 • Pressure ratio at extremities equal 7

  16. MKI8 – intermodules right of tank 2 • 50ns_1092b+1small_1042_35_1008_108bpi • With B2, high pressure in inter-module at right extremity of tank with highest pressure • The highest pressure in on the right of the tank • The pressure ratio is 2 to 3 • The ceramic chamber seems to have the • highest pressure increase

  17. Fill 2251 • MD25 ns, wk 43 • Fill 2251 : 2100/1020 b spaced by 25 ns and 925 ns, 72bpi

  18. MKI2 - Tank

  19. MKI2 – Tank with intermodules

  20. MKI8 - Tank

  21. MKI8 – Tank with intermodules

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