j. turner 1/26/06 slac pepii accelerator physics ler steering and optics motivation steering model...

J. Turner1/26/06

SLAC PEPII Accelerator Physics

LER Steering and Optics

Motivation

Steering

Model Preparation

Hysteresis

Injection Tuning


J. Turner1/26/06

Motivation

• Reduce orbit to minimize emittance. This unfortunately changes optics and degrades luminosity.

• To restore or repair optics from “where we are” has proven to be difficult. A clear difference to design would be useful in finding the biggest errors. So, loading a design magnet config and getting phase advance and MIA data and perhaps ORM there could be VERY illuminating.


J. Turner1/26/06

Steering

• SVD minimize correctors initially gets out closed bumps, reduced corrector strengths. This is done with the minimize corrector flag turned on and proportion eigen values set to 0.4 or 0.5 depending which looks better.

• After minimize, then steer normal SVD to zero BPMs where real misalignments occur.

• This was VERY successful


J. Turner1/26/06

LER orbit before and after


J. Turner1/26/06

Model Preparation• 33 cm BX* by 10 mm BY* created by Yuri

in MAY 2004

• Magnet configuration made by Jerry Yocky (and myself)


J. Turner1/26/06

Horizontal Beta Picture of 33 by .1 lattice

This slide courtesy of J. Yocky


J. Turner1/26/06

Vertical Beta Picture of 33 by .1 lattice

This slide courtesy of J. Yocky


J. Turner1/26/06

Hysterisis

• “Knobbing to config” created problems with hysterisis which dominated injection and tune space. After restore those problems persisted...this is how we know it was hysterisis.


J. Turner1/26/06

Injection Tuning• Injection was kept through the stored septum

Y bump and X angle.


J. Turner1/26/06

Power supply list• !TITLE=1422* 690:3.12 Design 10mm BY* 33cm BX* jt/jy

• PRIM MICR UNIT SECN ALIAS FILE CON DES

• ---- ---- ------ ---- ----------- ---- --------- --------- ---------

• LGPS,PR02, 312,BDES,,SCY3R03 -330.28 -330.28 -320.11

• LGPS,PR02, 311,BDES,,SCY3R01 -330.28 -330.28 -320.11

• LGPS,PR02, 310,BDES,,SCX3R03 95.131 95.131 74.167

• LGPS,PR02, 309,BDES,,SCX3R01 95.131 95.131 74.167

• LGPS,PR02, 308,BDES,,SCX2 70.737 70.737 77.573

• LGPS,PR02, 307,BDES,,SCX1 70.737 70.737 77.572

• LGPS,PR02, 306,BDES,,SCX1L -70.737 -70.737 -77.572

• LGPS,PR02, 305,BDES,,SCX2L -70.737 -70.737 -77.572

• LGPS,PR02, 210,BDES,,SK6 1.0412 1.0412 1.4776

• LGPS,PR02, 209,BDES,,SK5 3.0280 3.0280 2.9944

• LGPS,PR02, 208,BDES,,SK4 .30507 .30507 1.7035

• LGPS,PR02, 207,BDES,,SK3 -.54840 -.54840 -.95084

• LGPS,PR02, 206,BDES,,SK2 2.5780 2.5780 3.1027

• LGPS,PR02, 205,BDES,,SK2L -1.1530 -1.1530 -1.5004

• LGPS,PR02, 204,BDES,,SK3L .32343 .32343 .30687

• LGPS,PR02, 203,BDES,,SK4L -.19061 -.19061 -2.5133


J. Turner1/26/06

Power supply list• LGPS,PR02, 202,BDES,,SK5L -2.6059 -2.6059 -3.1203

• LGPS,PR02, 201,BDES,,SK6L -1.1735 -1.1735 -1.6531

• STEP,PR02, 3022,BDES,,SK1R .45291 .45291 .53299

• STEP,PR02, 2205,BDES,,SK1L -.28064 -.28064 -.27853

• LGPS,PR02, 149,BDES,,QDS4 -15.718 -15.718 -13.101

• LGPS,PR02, 148,BDES,,QFS3 23.525 23.525 23.644

• LGPS,PR02, 147,BDES,,QDS2 -24.355 -24.355 -24.618

• LGPS,PR02, 146,BDES,,QFS1 27.919 27.919 29.333

• LGPS,PR02, 145,BDES,,QFS1L 26.035 26.035 27.828

• LGPS,PR02, 144,BDES,,QDS2L -24.623 -24.623 -25.194

• LGPS,PR02, 143,BDES,,QFS3L 23.867 23.867 24.000

• LGPS,PR02, 142,BDES,,QDS4L -15.861 -15.861 -14.404

• LGPS,PR02, 127,BDES,,QDBM6 -17.375 -17.375 -18.164

• LGPS,PR02, 126,BDES,,QFBM5 16.189 16.189 15.168

• LGPS,PR02, 124,BDES,,QDBM3 -26.129 -26.129 -29.026

• LGPS,PR02, 122,BDES,,QFBM1 11.095 11.095 11.669

• LGPS,PR02, 133,BDES,,QFCX1R2 20.891 20.891 21.170

• LGPS,PR02, 132,BDES,,QFCX1R1 20.891 20.891 21.170

• LGPS,PR02, 116,BDES,,QFBM1L 27.392 27.392 26.784

• LGPS,PR02, 115,BDES,,QDBM2L -18.612 -18.612 -18.130


J. Turner1/26/06

Power supply list• LGPS,PR02, 114,BDES,,QDBM3L -16.944 -16.944 -15.652

• LGPS,PR02, 113,BDES,,QDBM4L -20.551 -20.551 -26.746

• LGPS,PR02, 112,BDES,,QFBM5L 33.192 33.192 34.171

• LGPS,PR02, 108,BDES,,QF2R 43.287 43.287 44.488

• LGPS,PR02, 107,BDES,,QF2L 46.948 46.948 46.405

• LGPS,PR02, 106,BDES,,QDB1R03 -26.996 -26.996 -26.492

• LGPS,PR02, 105,BDES,,QFB1R03 19.714 19.714 19.498

• LGPS,PR02, 104,BDES,,QFB1R01 19.714 19.714 19.498

• LGPS,PR02, 103,BDES,,QDB1R01 -26.996 -26.996 -26.492

• LGPS,PR04, 314,BDES,,SCX4R03 307.78 307.78 259.94

• LGPS,PR04, 214,BDES,,SKG4 0.0 0.0 .97513

• LGPS,PR04, 213,BDES,,SKG3 0.0 0.0 1.3700

• LGPS,PR03, 179,BDES,,QFP3R04 22.349 22.349 21.175

• LGPS,PR03, 177,BDES,,QFP5R04 21.403 21.403 21.109

• LGPS,PR03, 176,BDES,,QDP6R04 -16.882 -16.882 -18.323

• LGPS,PR03, 175,BDES,,QFP7R04 19.326 19.326 24.644

• LGPS,PR03, 174,BDES,,QDP8R04 -16.710 -16.710 -20.297

• LGPS,PR03, 173,BDES,,QFP9R04 24.127 24.127 25.794

• LGPS,PR04, 172,BDES,,QFPR04 27.360 27.360 26.519

• LGPS,PR04, 171,BDES,,QDPR04 -27.360 -27.360 -27.970


J. Turner1/26/06

Power supply list• LGPS,PR06, 199,BDES,,QFW1 28.552 28.552 29.095

• LGPS,PR06, 198,BDES,,QDW2 -46.820 -46.820 -46.344

• LGPS,PR06, 197,BDES,,QFW3 23.670 23.670 23.373

• LGPS,PR06, 196,BDES,,QFW4 24.994 24.994 24.829

• LGPS,PR06, 194,BDES,,QFW6 32.946 32.946 32.621

• LGPS,PR06, 193,BDES,,QFW7 14.326 14.326 14.469

• LGPS,PR06, 192,BDES,,QDW8 -17.149 -17.149 -17.260

• LGPS,PR08, 304,BDES,,SF2 345.02 345.02 384.56

• LGPS,PR08, 303,BDES,,SF1 C 172.51 172.51 192.34

• LGPS,PR08, 302,BDES,,SD2 C -746.66 -746.66 -847.41

• LGPS,PR08, 301,BDES,,SD1 C -373.33 -373.33 -426.79

• LGPS,PR08, 184,BDES,,QDI -3.0085 -3.0085 -3.0474

• LGPS,PR08, 183,BDES,,QFI 6.7051 6.7051 6.6704

• LGPS,PR08, 182,BDES,,QDOI -10.462 -10.462 -10.731

• LGPS,PR08, 181,BDES,,QFOI 16.822 16.822 16.993

• LGPS,PR12, 313,BDES,,SCX4R01 307.78 307.78 259.94

• LGPS,PR12, 212,BDES,,SKG2 0.0 0.0 -1.2562

• LGPS,PR12, 211,BDES,,SKG1 0.0 0.0 .46485

• LGPS,PR12, 179,BDES,,QFP3R12 22.349 22.349 20.985

• LGPS,PR12, 178,BDES,,QDP4R12 -18.925 -18.925 -19.177


J. Turner1/26/06

Power supply list• LGPS,PR12, 177,BDES,,QFP5R12 21.403 21.403 20.737

• LGPS,PR12, 176,BDES,,QDP6R12 -16.882 -16.882 -18.100

• LGPS,PR12, 175,BDES,,QFP7R12 19.326 19.326 24.686

• LGPS,PR12, 174,BDES,,QDP8R12 -16.710 -16.710 -19.970

• LGPS,PR12, 173,BDES,,QFP9R12 24.127 24.127 25.005

• LGPS,PR12, 172,BDES,,QFPR12 27.360 27.360 26.078

• LGPS,PR12, 171,BDES,,QDPR12 -27.360 -27.360 -28.237


J. Turner1/26/06

Conclusions

• Hysterisis too great for knobbing full optics (any MD in this direction need standardize)

• Steering solutions can be had with nearly flat orbit to be “in the green” at low currents. (here again, keeping specific as currents are raised is very difficult requiring successive shifts of expert tuning...MD)

j. turner 1/26/06 slac pepii accelerator physics ler steering and optics motivation steering model...

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