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 | |
