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Impedance of the TOTEM Roman Pots Nicola Minafra, Benoit Salvant, Nicolò Biancacci, …

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Presentation on theme: "Impedance of the TOTEM Roman Pots Nicola Minafra, Benoit Salvant, Nicolò Biancacci, …"— Presentation transcript:

1 Impedance of the TOTEM Roman Pots Nicola Minafra, Benoit Salvant, Nicolò Biancacci, …

2 The RP system 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 2

3 The RP system 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 3 Vertical RP Cylindrical RP Horizontal RP Shielded RP 4 X 2 X1 X 2 X

4 Wakefield simulations using CST 4 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra Real part of the longitudinal impedance for the old horizontal RP at various distances d (mm) from the beam

5 Wire and probe tests 5 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra Simulations Measurements Cylindrical RPShielded RP TOTEM NOTE: RF Measurements of the New TOTEM Roman Pot Only geometrical contribution!

6 The RP system D (mm) USED? OLD (PAIR)6.6YES* SHIELDED3.0YES SHIELDED2.1YES OLD (PAIR)6.2YES* OLD (PAIR)6.1GARAGE OLD1.9GARAGE CYLINDRICAL1.9YES OLD1.6GARAGE OLD (PAIR)5.8GARAGE D (mm) USED? OLD (PAIR)6.5YES* SHIELDED3.1YES SHIELDED2.2YES OLD (PAIR)5.9YES* OLD (PAIR)5.8GARAGE OLD2.0GARAGE CYLINDRICAL2.0YES OLD1.7GARAGE OLD (PAIR)5.5GARAGE Beam 1 Beam 2 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 6 * Vertical RP can be extracted in case of problems

7 The RP system D (mm) USED? OLD (PAIR)5.2GARAGE SHIELDED7.9GARAGE SHIELDED6.5YES OLD (PAIR)6.4YES OLD (PAIR)6.6YES OLD6.1YES CYLINDRICAL6.0GARAGE OLD5.4YES OLD (PAIR)7.4YES D (mm) USED? OLD (PAIR)5.3GARAGE SHIELDED7.8GARAGE SHIELDED6.4YES OLD (PAIR)6.6YES OLD (PAIR)6.8YES OLD6.0YES CYLINDRICAL5.9GARAGE OLD5.3YES OLD (PAIR)7.5YES Beam 1 Beam 2 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 7

8 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 8

9 Low frequency longitudinal impedance 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 9 ℑ[∥]ℑ[∥] Low frequency longitudinal impedance is a conservative estimation of the effective longitudinal impedance Horizontal Old RP 5.4 mm form the beam

10 Low frequency longitudinal impedance 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 10 Low frequency longitudinal impedance is a conservative estimation of the effective longitudinal impedance Cylindrical RP 1.9 mm form the beam ℑ[∥]ℑ[∥]

11 D (mm) 5.3115.31.40 5.4115.21.39 6.0111.11.35 6.1110.61.34 4079.10.42 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 11

12 D (mm) 5.9138.7 1.56 6.2137.5 1.55 6.4136.6 1.54 6.5136.2 1.53 6.6135.8 1.53 6.8134.8 1.52 7.4132.4 1.49 7.5132.0 1.48 40141.5 0.64 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 12

13 D (mm) 2.1109.151.23 2.2108.271.22 3.0101.851.15 3.1101.111.14 6.481.430.92 6.580.950.91 4029.270.33 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 13

14 D (mm) 1.91021.15 2.01011.14 40170.19 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 14

15 Low frequency transverse impedance 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 15 Moving the particle beam, integration path always in the centre Moving the integration path, beam always in the centre

16 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 16 D (mm) 40284.77 / 7321.63 / 67211.50.5 8 3.90.2 40263.44 / 7314.98 / 67211.50.5 70.33.60.1 40261.88 / 7323.53 / 67211.50.5 7 3.60.2 40238.20 / 7316.46 / 67211.50.5 70.43.30.1 D (mm) 5.3640.15 / 73309.70 / 6788107 88427032 5.4758.39 / 73320.82 / 678897 93438334 6.0673.18 / 73395.82 / 677795 83536430 6.1797.72 / 73410.74 / 677795 98557631

17 D (mm) 5.9273.3 / 7327.93 / 672610 11 974375 6.2295.00 / 7325.9 / 67259 9 11 1013364 6.5329.85 / 7357.69 / 67229 9 11 998419 6.6345.16 / 7355.44 / 67229 9 10 1047438 40286.96 / 7322.49 / 6731 2 2 120.54 40261.36 / 7314.51 / 6731 2 2 110.54 40264.32 / 7324.42 / 6731 2 2 110.54 40235.90 / 7315.94 / 6731 2 2 100.53 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 17

18 D (mm) 6.4588.49 / 73456.29 / 672391011 185687275 6.6618.97 / 73439.42 / 67229911 186597672 6.6628.84 / 73420.38 / 67229910 189567863 6.8661.26 / 73405.05 / 67219910 190548160 7.4770.82 / 73312.42 / 6719889 200378442 7.5810.80 / 73301.64 / 6718889 200368940 378.55 / 73698.84 / 673122 15215 40397.68 / 73671.46 / 673122 16205 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 18

19 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 19 D (mm) 2.1297.24 / 7326.92 / 67 2.2275.81 / 7328.98 / 67 3.0342.71 / 7353.71 / 67 3.1327.08 / 7355.96 / 67 D (mm) 6.4607.55 / 73449.15 / 67 6.5577.85 / 73466.45 / 67 40387.32 / 73686.37 / 67 40406.92 / 73659.53 / 67

20 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 20 D (mm) 1.9281.69 / 7320.48 / 67262724 1007105 2.0258.45 / 7322.32 / 67242523 85888 D (mm) 40656.27 / 73397.34 / 6711 96 40690.15 / 73382.99 / 6711 96

21 21 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra LHC Power Spectrum LHC revolution frequency Number of buckets: 3564 The computation has been done using a flat top Power Spectrum with a bunch spacing of 25 ns. Impedance contribution is only geometrical. Power loss: heating

22 Old RP horizontal, heating 22 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra

23 Old RP vertical, heating 23 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra

24 Shielded RP, heating 24 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra TO BE DONE

25 Cylindrical RP, heating 25 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra

26 D (mm) OLD (PAIR) 6.6 1.53 (0.64) < 0.1 0.2 (< 0.1) SHIELDED3.01.15 SHIELDED2.11.23 OLD (PAIR) 6.2 1.55 (0.64) < 0.1 0.2 (< 0.1) OLD (PAIR) 400.64< 0.1 OLD400.42< 0.1 CYLINDRI CAL 1.91.15<< 0.10.1 OLD400.42< 0.1 OLD (PAIR) 400.64< 0.1 TOTAL 8.7 (6.9) D (mm) OLD (PAIR) 6.5 1.53 (0.64) <0.1 0.2 (< 0.1) SHIELDED3.11.14 SHIELDED2.21.22 OLD (PAIR) 5.9 1.56 (0.64) < 0.1 0.2 (< 0.1) OLD (PAIR) 400.64< 0.1 OLD400.42< 0.1 CYLINDRI CAL 2.01.14<< 0.10.1 OLD400.42< 0.1 OLD (PAIR) 400.64<0.1 TOTAL 8.7 (6.9) 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 26

27 D (mm) OLD (PAIR) 400.64<< 0.1 SHIELDED400.33 SHIELDED6.50.91 OLD (PAIR) 6.41.540.2< 0.1 OLD (PAIR) 6.61.530.2< 0.1 OLD6.11.34< 0.10.1 CYLINDRI CAL 400.19<< 0.1 OLD5.41.39< 0.10.1 OLD (PAIR) 7.41.490.2< 0.1 TOTAL9.4 D (mm) OLD (PAIR) 400.64<< 0.1 SHIELDED400.33 SHIELDED6.40.92 OLD (PAIR) 6.61.530.2< 0.1 OLD (PAIR) 6.81.520.2< 0.1 OLD6.01.35< 0.10.1 CYLINDRI CAL 400.19<< 0.1 OLD5.31.39< 0.10.1 OLD (PAIR) 7.51.480.2< 0.1 TOTAL9.4 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 27

28 Conclusion 8.7 (6.9) 9.4 All RP in GARAGE 4.2 All RP in GARAGE (before LS1) 4.2 23/03/2015Impedance of the TOTEM RPs - Nicola Minafra 28

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