Subject: Followup to last week's presentation on simultaneous phase/eta correction of the horizontal dispersion anomaly From: Jim Crittenden Date: Thu, 24 Apr 2008 12:29:48 -0400 To: David Rubin CC: Mike Billing , Mark Palmer , David Sagan , Stu Peck Dear low-emittance enthusiast, The results on the successful horizontal dispersion correction using non-sc quads shown in last week's Low-Emittance Tuning meeting evoked a few questions which I will address in this message and in today's LET meeting. 1) What does SHOW QUAD show after the correction? Where do the quad values go relative to the design and save set values? First, as a reminder, here is the cesrv optimizer output for the correction. Remember that since we have no phase measurement, we are constraining the phase to the design phase while correcting the dispersion. The (rather arbitrary) weights are: set orbit_x_wgt(0:99)=0 set orbit_y_wgt(0:99)=0 set eta_x_wgt(0:99)=0. set eta_x_wgt(15:40)=2. set eta_y_wgt(0:99)=0 set phase_x_wgt(15:40)=2. set phase_y_wgt(0:99)=2. =========================================================== Top10 merit | Top10 derivative | Top10 delta Name ix Value | Name ix Derivative | Name ix delta Eta_X 24 0.8 Quad_K1 34 -2.371E+02 Quad_K1 50 0.004188 Eta_X 26 0.7 Quad_K1 14 -2.179E+02 Quad_K1 49 0.003070 Eta_X 30 0.3 Quad_K1 89 2.161E+02 Quad_K1 13 0.002820 Eta_X 28 0.3 Quad_K1 18 -2.084E+02 Quad_K1 19 0.001566 Eta_X 22 0.3 Quad_K1 65 2.028E+02 Quad_K1 51 -0.001529 Eta_X 32 0.3 Quad_K1 75 1.977E+02 Quad_K1 62 -0.001504 Quad_K1 84 0.2 Quad_K1 81 1.817E+02 Quad_K1 26 0.001380 Quad_K1 96 0.2 Quad_K1 24 -1.696E+02 Quad_K1 48 0.001380 Quad_K1 9 0.2 Quad_K1 48 1.613E+02 Quad_K1 46 -0.001372 Quad_K1 15 0.2 Quad_K1 57 -1.475E+02 Quad_K1 11 0.001367 Merit: 8.307610 Merit sum for: Beta_X 2.0190E-01 Merit sum for: Beta_Y 5.1602E-01 Merit sum for: Orbit_X 0.0000E+00 Merit sum for: Orbit_Y 0.0000E+00 Merit sum for: Phase_X 8.7140E-02 Merit sum for: Phase_Y 6.2259E-02 Merit sum for: Eta_X 3.9680E+00 Merit sum for: Eta_Y 0.0000E+00 Merit sum for: Tune_X 0.0000E+00 Merit sum for: Tune_Y 0.0000E+00 Merit sum for: Cbar_12 3.0064E-03 Merit sum for: dE/E 7.1160E-06 Merit sum for: Quad K1 3.4693E+00 =========================================================== The SHOW QUAD output is appended below. The Q13W and Q19W k1 values are closer to the design values. 2) Is it possible to perform the correction when restricting the quad adjustments to the region Q10W to Q34W? Answer: YES. Before correction: http://www.lepp.cornell.edu/~critten/cesrta/notes/24apr08/mode00120155.gif After correction: http://www.lepp.cornell.edu/~critten/cesrta/notes/24apr08/mode00120157.gif Quads 13w and 19w are again the top players. I append the quad settings for the quads which were used (deviate from their design values) below. =========================================================== Top10 merit | Top10 derivative | Top10 delta Name ix Value | Name ix Derivative | Name ix delta Eta_X 24 0.8 Quad_K1 14 -7.534E+01 Quad_K1 13 0.002717 Eta_X 26 0.7 Quad_K1 34 -6.574E+01 Quad_K1 19 0.001523 Eta_X 30 0.4 Quad_K1 18 -5.410E+01 Quad_K1 11 0.001343 Eta_X 22 0.3 Quad_K1 28 -5.269E+01 Quad_K1 16 -0.001299 Eta_X 28 0.3 Quad_K1 26 4.920E+01 Quad_K1 18 -0.001267 Eta_X 32 0.3 Quad_K1 33 -2.397E+01 Quad_K1 20 -0.001065 Quad_K1 15 0.2 Quad_K1 24 -2.235E+01 Quad_K1 21 0.000984 Eta_X 23 0.2 Quad_K1 20 2.056E+01 Quad_K1 24 0.000882 Quad_K1 33 0.2 Quad_K1 13 -1.970E+01 Quad_K1 26 0.000829 Quad_K1 19 0.1 Quad_K1 30 1.836E+01 Quad_K1 22 0.000823 Merit: 5.658656 Merit sum for: Beta_X 1.1900E-01 Merit sum for: Beta_Y 1.4482E-01 Merit sum for: Orbit_X 0.0000E+00 Merit sum for: Orbit_Y 0.0000E+00 Merit sum for: Phase_X 2.6669E-02 Merit sum for: Phase_Y 5.0070E-02 Merit sum for: Eta_X 4.1449E+00 Merit sum for: Eta_Y 0.0000E+00 Merit sum for: Tune_X 0.0000E+00 Merit sum for: Tune_Y 0.0000E+00 Merit sum for: Cbar_12 2.2924E-03 Merit sum for: dE/E 2.7124E-06 Merit sum for: Quad K1 1.1709E+00 =========================================================== 3) Can measured phase and eta functions be corrected this way? Answer: Now that Stu got the data, we'll find out. Maybe by the time of the meeting. 4) Could you add a link to the wiki? Answer: Sort of. https://wiki.lepp.cornell.edu/ilc/bin/view/Public/CesrTA/LowEmittTuning -- Jim ======================================================== James Crittenden Tel. (607) 255-9424 Wilson Synchrotron Laboratory Fax (607) 255-8062 Cornell University Ithaca, New York 14853-8001 ======================================================== * *CESRV> show quad | | Model | | | ............K1.............. | Beta Eta | | Name | Model Design Saved | X Y X | dK1_dCU | Ix Q00W -4.591410 -4.591410 -4.591410 1.19 22.79 0.00 0.00E+00 0 Q03W -0.175332 -0.175906 -0.174997 7.97 18.37 0.07 -2.22E-05 3 Q04W 0.495310 0.495965 0.494642 14.93 7.35 0.60 3.23E-05 4 Q05W -0.338261 -0.338646 -0.337739 1.82 31.81 0.86 -3.24E-05 5 Q06W 0.397609 0.397708 0.396572 38.33 11.92 2.10 3.25E-05 6 Q07W -0.222233 -0.222249 -0.221338 19.51 27.96 1.62 -3.25E-05 7 Q08W 0.122012 0.122046 0.122403 29.43 16.91 2.27 3.24E-05 8 Q09W -0.156568 -0.156864 -0.151987 16.25 36.24 1.88 -3.25E-05 9 Q10W 0.235070 0.235472 0.233748 38.95 15.75 2.60 3.25E-05 10 Q11W -0.202432 -0.203799 -0.199868 6.30 41.38 1.08 -3.25E-05 11 Q12W 0.211765 0.212608 0.213939 19.59 6.81 0.90 3.25E-05 12 Q13W -0.253953 -0.256773 -0.251355 10.48 18.91 0.65 -3.24E-05 13 Q14W 0.274673 0.274921 0.274564 41.81 2.32 1.32 3.25E-05 14 Q15W -0.227511 -0.227651 -0.223156 3.68 41.61 0.94 -3.23E-05 15 Q16W 0.305734 0.307048 0.305461 23.16 5.99 2.20 3.24E-05 16 Q17W -0.344943 -0.344578 -0.346294 5.80 19.29 0.92 -3.24E-05 17 Q18W 0.233942 0.235241 0.233392 39.16 3.46 1.51 3.24E-05 18 Q19W -0.158939 -0.160505 -0.155125 18.18 21.36 1.00 -3.24E-05 19 Q20W 0.188699 0.189672 0.187879 30.38 8.56 1.22 3.26E-05 20 Q21W -0.212744 -0.213690 -0.210219 6.57 30.20 1.11 -3.24E-05 21 Q22W 0.247731 0.246497 0.246141 19.98 10.73 2.35 3.24E-05 22 Q23W -0.220497 -0.219791 -0.221958 6.83 35.63 1.64 -3.23E-05 23 Q24W 0.233108 0.232125 0.233457 41.94 6.45 3.07 3.25E-05 24 Q25W -0.292853 -0.292481 -0.291087 9.44 24.53 1.68 -3.24E-05 25 Q26W 0.245054 0.243673 0.242312 26.38 3.81 2.74 3.24E-05 26 Q27W -0.270296 -0.270811 -0.269549 5.16 30.86 1.36 -3.24E-05 27 Q28W 0.228507 0.227586 0.227130 27.83 8.87 2.06 3.25E-05 28 Q29W -0.208203 -0.208721 -0.205696 12.18 26.47 1.24 -3.25E-05 29 Q30W 0.233912 0.233935 0.231696 42.15 8.53 2.07 3.24E-05 30 Q31W -0.205219 -0.205703 -0.201810 5.84 35.00 1.23 -3.24E-05 31 Q32W 0.199228 0.198744 0.199720 14.35 13.60 1.98 3.25E-05 32 Q33W -0.196497 -0.196144 -0.200045 13.26 33.62 1.62 -3.25E-05 33 Q34W 0.244104 0.243953 0.243792 44.20 14.12 2.10 3.22E-05 34 Q35W -0.183602 -0.183140 -0.182171 13.02 33.88 1.19 -3.23E-05 35 Q36W 0.185501 0.185117 0.184728 24.73 8.52 1.69 3.24E-05 36 Q37W -0.222906 -0.221749 -0.226154 7.54 25.58 1.24 -3.24E-05 37 Q38W 0.243809 0.243803 0.242765 26.84 8.20 2.32 3.24E-05 38 Q39W -0.220609 -0.220539 -0.219728 6.68 32.15 1.47 -3.24E-05 39 Q40W 0.259104 0.260328 0.259939 24.21 10.28 2.41 3.24E-05 40 Q41W -0.218570 -0.218842 -0.218517 5.93 33.63 1.12 -3.25E-05 41 Q42W 0.236821 0.237857 0.236462 24.92 9.30 1.40 3.25E-05 42 Q43W -0.248425 -0.248656 -0.248980 9.25 25.64 0.81 -3.24E-05 43 Q44W -0.207063 -0.206948 -0.208051 10.07 27.85 0.95 -3.24E-05 44 Q45W 0.281892 0.281733 0.281992 33.44 8.86 1.73 3.24E-05 45 Q46W -0.240912 -0.239540 -0.238275 4.78 27.51 1.02 -3.25E-05 46 Q47W 0.447310 0.446581 0.449535 12.67 9.60 0.22 3.25E-05 47 CSR_QUAD_CU 0.584514 0.583134 0.581793 42.63 2.46 -0.75 7.41E-06 48 CSR_QUAD_CU-0.279183 -0.276113 -0.280568 6.71 8.51 -0.41 -4.01E-05 49 CSR_QUAD_CU-0.271925 -0.276113 -0.269486 7.42 8.24 -0.31 -4.02E-05 50 CSR_QUAD_CU 0.581605 0.583134 0.579531 45.11 2.45 -0.39 7.41E-06 51 Q47E 0.445796 0.446581 0.442484 13.23 9.80 0.30 3.25E-05 52 Q46E -0.238800 -0.239540 -0.241325 5.27 27.30 0.92 -3.24E-05 53 Q45E 0.281534 0.281733 0.280240 32.11 8.80 1.44 3.24E-05 54 Q44E -0.207198 -0.206948 -0.207370 9.14 27.81 0.79 -3.24E-05 55 Q43E -0.248700 -0.248656 -0.249337 9.14 25.72 0.79 -3.24E-05 56 Q42E 0.237662 0.237857 0.237857 27.32 9.30 1.53 3.24E-05 57 Q41E -0.218685 -0.218842 -0.217577 6.29 33.68 1.24 -3.25E-05 58 Q40E 0.259995 0.260328 0.259226 22.35 10.27 2.62 3.24E-05 59 Q39E -0.220797 -0.220539 -0.220019 6.14 32.22 1.52 -3.25E-05 60 Q38E 0.244145 0.243803 0.243186 28.31 8.20 2.22 3.25E-05 61 Q37E -0.223253 -0.221749 -0.224994 8.37 25.56 1.11 -3.25E-05 62 Q36E 0.185943 0.185117 0.187389 25.37 8.47 1.42 3.25E-05 63 Q35E -0.184099 -0.183140 -0.186054 11.77 33.87 1.03 -3.24E-05 64 Q34E 0.244377 0.243953 0.245657 39.74 14.07 0.00 3.21E-05 65 Q33E -0.196662 -0.196144 -0.198579 12.23 33.50 1.55 -3.25E-05 66 Q32E 0.199435 0.198744 0.200074 15.11 13.54 2.05 3.24E-05 67 Q31E -0.206125 -0.205703 -0.208200 6.16 34.94 1.36 -3.24E-05 68 Q30E 0.234186 0.233935 0.233708 39.73 8.42 2.38 3.24E-05 69 Q29E -0.208994 -0.208721 -0.208298 10.91 26.28 1.37 -3.25E-05 70 Q28E 0.227636 0.227586 0.227456 26.03 8.84 2.13 3.25E-05 71 Q27E -0.270953 -0.270811 -0.270130 5.68 30.85 1.31 -3.25E-05 72 Q26E 0.243582 0.243673 0.242603 28.60 3.78 2.52 3.24E-05 73 Q25E -0.291942 -0.292481 -0.291378 9.23 24.59 1.55 -3.25E-05 74 Q24E 0.231987 0.232125 0.231963 38.04 6.59 2.90 3.24E-05 75 Q23E -0.219003 -0.219791 -0.216419 6.51 35.60 1.65 -3.24E-05 76 Q22E 0.246114 0.246497 0.246465 21.69 10.80 2.52 3.26E-05 77 Q21E -0.212466 -0.213690 -0.211451 7.08 30.25 1.26 -3.25E-05 78 Q20E 0.189020 0.189672 0.186947 28.92 8.54 1.48 3.24E-05 79 Q19E -0.159387 -0.160505 -0.155578 16.36 21.33 1.14 -3.24E-05 80 Q18E 0.234639 0.235241 0.231633 35.05 3.37 1.64 3.25E-05 81 Q17E -0.343723 -0.344578 -0.343475 5.60 19.79 0.89 -3.24E-05 82 Q16E 0.306678 0.307048 0.304222 25.59 6.04 1.94 3.25E-05 83 Q15E -0.226883 -0.227651 -0.222105 3.58 40.89 0.83 -3.24E-05 84 Q14E 0.274986 0.274921 0.272911 38.45 2.33 1.25 3.24E-05 85 Q13E -0.238219 -0.237873 -0.237518 10.14 19.69 0.68 -3.23E-05 86 Q12E 0.211327 0.211039 0.211395 19.37 7.96 1.04 3.23E-05 87 Q11E -0.191321 -0.191149 -0.191376 6.57 44.05 1.08 -3.24E-05 88 Q10E 0.228607 0.228600 0.225611 37.72 17.95 2.71 3.25E-05 89 Q09E -0.174019 -0.174133 -0.171333 17.19 39.82 2.00 -3.26E-05 90 Q08E 0.125795 0.125705 0.125802 33.79 14.85 2.55 3.24E-05 91 Q07E -0.199376 -0.199583 -0.200134 19.25 23.31 1.64 -3.24E-05 92 Q06E 0.384495 0.384667 0.382205 35.58 10.61 1.98 3.24E-05 93 Q05E -0.331767 -0.331903 -0.331642 1.98 30.04 0.73 -3.27E-05 94 Q04E 0.489324 0.490374 0.488563 13.26 8.17 0.62 3.23E-05 95 Q03E -0.186489 -0.187384 -0.181829 7.65 21.93 0.14 -3.23E-05 96 Q00E -4.591410 -4.591410 -4.591410 1.36 22.62 0.01 0.00E+00 99 Q49AW 0.004687 0.004687 -0.000397 1.26 8.29 0.00 4.31E-05 101 Q47AW -0.356920 -0.356920 -0.353386 2.55 35.24 0.00 -3.24E-05 102 Q47AE -0.356920 -0.356920 -0.351423 2.34 36.34 0.00 -3.25E-05 103 Q49AE 0.004687 0.004687 -0.000605 1.35 8.25 0.00 4.30E-05 104 Q43AW 0.238742 0.238742 0.238872 16.22 14.74 0.00 3.24E-05 105 Q43AE 0.238742 0.238742 0.237868 15.20 14.77 0.00 3.24E-05 106 Q08AW 0.000000 0.000000 0.000000 18.75 27.56 0.00 3.24E-05 107 SC_Q01W -1.991663 -1.991663 -1.990619 5.66 53.34 0.00 -2.61E-04 111 SC_Q02W 1.318348 1.318348 1.316962 31.89 24.38 0.00 1.07E-04 112 SC_Q02E 1.318348 1.318348 1.330713 37.05 24.54 0.00 1.06E-04 113 SC_Q01E -1.991663 -1.991663 -1.987215 6.59 53.23 0.00 -2.62E-04 114 Name | Model Design Saved | X Y X | dK1_dCU | Ix | ............K1.............. | Beta Eta | | | | Model | | ==================================================================== | | Model | | | ............K1.............. | Beta Eta | | Name | Model Design Saved | X Y X | dK1_dCU | Ix Q10W 0.235336 0.235472 0.233748 38.96 15.72 2.60 3.25E-05 10 Q11W -0.202457 -0.203799 -0.199868 6.29 41.28 1.08 -3.25E-05 11 Q12W 0.211964 0.212608 0.213939 19.59 6.80 0.92 3.25E-05 12 Q13W -0.254057 -0.256773 -0.251355 10.48 18.97 0.67 -3.24E-05 13 Q14W 0.274684 0.274921 0.274564 41.83 2.32 1.33 3.25E-05 14 Q15W -0.227664 -0.227651 -0.223156 3.68 41.60 0.94 -3.23E-05 15 Q16W 0.305749 0.307048 0.305461 23.16 5.99 2.17 3.24E-05 16 Q17W -0.344960 -0.344578 -0.346294 5.80 19.29 0.91 -3.24E-05 17 Q18W 0.233974 0.235241 0.233392 39.16 3.46 1.51 3.24E-05 18 Q19W -0.158982 -0.160505 -0.155125 18.18 21.35 1.00 -3.24E-05 19 Q20W 0.188608 0.189672 0.187879 30.38 8.55 1.23 3.26E-05 20 Q21W -0.212706 -0.213690 -0.210219 6.58 30.18 1.12 -3.24E-05 21 Q22W 0.247320 0.246497 0.246141 19.99 10.74 2.37 3.24E-05 22 Q23W -0.220460 -0.219791 -0.221958 6.85 35.61 1.65 -3.23E-05 23 Q24W 0.233007 0.232125 0.233457 41.96 6.45 3.09 3.25E-05 24 Q25W -0.293031 -0.292481 -0.291087 9.44 24.53 1.68 -3.24E-05 25 Q26W 0.244502 0.243673 0.242312 26.38 3.81 2.74 3.24E-05 26 Q27W -0.270335 -0.270811 -0.269549 5.21 30.86 1.36 -3.24E-05 27 Q28W 0.227977 0.227586 0.227130 27.84 8.88 2.07 3.25E-05 28 Q29W -0.208224 -0.208721 -0.205696 12.17 26.43 1.25 -3.25E-05 29 Q30W 0.233695 0.233935 0.231696 42.14 8.51 2.10 3.24E-05 30 Q31W -0.205209 -0.205703 -0.201810 5.87 34.96 1.25 -3.24E-05 31 Q32W 0.198521 0.198744 0.199720 14.34 13.61 1.99 3.25E-05 32 Q33W -0.196124 -0.196144 -0.200045 13.27 33.55 1.62 -3.25E-05 33 Q34W 0.244000 0.243953 0.243792 44.19 14.13 2.11 3.22E-05 34 Name | Model Design Saved | X Y X | dK1_dCU | Ix | ............K1.............. | Beta Eta | | | | Model | |