The Transverse Damping Systems for the SIS100 & SIS300 Synchrotrons at the Facility of Antiproton and Ion Research (FAIR at GSI)V.M. Zhabitsky, N. Lebedev, E. Gorbachev (JINR), U. Blell, P. Spiller (GSI)5th Workshop on Scientific Cooperation between German Research Centres and JINR18 January 2005

JINR- CERN - GSI

CERNW.Hofle, LHC ADT Project Engineer (Damper), T.Linnecar, LHC A Project Engineer (RF), R.Louwerse, J.-F.Malo, J.TuckmantelJINRV.M.Zhabitsky, N.I.Lebedev, E.V.Gorbachev, A.A.Fateev, A.A.Makarov, V.A.Melnikov, S.V.Rabtsoun, V.A.Bogdanov, N.V.Pilyar, V.G.Shabratov, K.P.Sychev, M.G.Pushkin, B.G.Komarov, V.I.Koryako, V.V.Kovalev + 10 pers.The LHC Transverse Damping System CERN Russia - JINR

JINR- CERN - GSI

Key Technologies in Accelerator: MagnetsB, QRF SystemEFeedback SystemsN,

JINR- CERN - GSI

FAIR at GSIHighest beam intensitiesBrilliant beam qualityHighest beam powerHigher beam energies

JINR- CERN - GSI

Coherent Transverse OscillationIf the bunch is displaced form the centre of the vacuum chamber it will drive a differential wall current.This leads to a magnetic field, which deflects the bunch.

JINR- CERN - GSI

JINR- CERN - GSI

W. HofleCERN AB/RF Example SPS (CNGS type beam, 1 batch, 1013 protons):3 ms growth rate0.5 ms damping time50 + turns relative silence at injection

injection with damper off

damper being switched on 7 ms (300 turns) after injectionTransverse Feedback (LHC Damper)

JINR- CERN - GSI

SIS100 & SIS300 DampersTransverse Feedback System with a real-time digital signal processing:damping of transverse injection oscillations,feedback curing transverse coupled bunch instabilities,excitation of transverse oscillations for beam measurements and other applications.General Parameters of SIS100 & SIS300Machine Circumference: 1191.96 mBeam revolution frequency: 104.1 - 251.3 kHzBeam revolution time: 9.61 - 3.98 s Horizontal tune at injection: QH=26.9Vertical tune at injection: QV=16.7Energy (238U): 0.092 34 GeV/u Intensity (238U73+, 238U28+): 0.09 - 0.47 - 1.1 A

JINR- CERN - GSI

JINR- CERN - GSI

Chart1

5.1024

5.8654

6.5206

7.069

7.5153

7.8673

8.1342

8.326

8.453

8.5247

8.5501

8.537

8.4927

8.4232

8.3336

8.2283

8.1111

7.9849

7.8523

7.7154

7.5758

7.4349

7.2938

7.1533

7.0142

6.877

6.742

6.6096

6.4801

6.3536

6.2301

6.1098

5.9928

5.8789

5.7682

5.6606

5.5561

5.4546

5.3561

5.2605

5.1677

5.0776

4.9901

4.9052

4.8227

4.7427

4.6649

4.5894

4.5161

4.4448

4.3755

4.3081

4.2426

4.1789

4.1169

4.0566

3.9979

3.9408

3.8852

3.831

3.7782

3.7267

3.6766

3.6277

3.58

3.5335

3.4881

3.4438

3.4006

3.3584

3.3172

3.2769

3.2376

3.1991

3.1615

3.1248

3.0889

3.0537

3.0193

2.9857

2.9528

2.9205

2.889

2.8581

2.8278

2.7981

2.7691

2.7406

2.7127

2.6853

2.6585

2.6322

2.6063

2.581

2.5562

2.5318

2.5078

2.4843

2.4613

2.4386

2.4163

2.3945

2.373

2.3519

2.3312

2.3108

2.2908

2.2711

2.2517

2.2327

2.2139

2.1955

2.1774

2.1595

2.142

2.1247

2.1077

2.091

2.0745

2.0583

2.0423

2.0266

2.0111

1.9959

1.9808

1.966

1.9514

1.937

1.9229

1.9089

1.8951

1.8815

1.8682

1.855

1.8419

1.8291

1.8165

1.804

1.7916

1.7795

1.7675

1.7557

1.744

1.7325

1.7211

1.7099

1.6988

1.6879

1.6771

1.6664

1.6559

1.6455

1.6352

1.625

1.615

1.6051

1.5953

1.5857

1.5761

1.5667

1.5574

1.5482

1.5391

1.5301

1.5212

1.5124

1.5037

1.4951

1.4866

1.4782

1.4699

1.4617

1.4535

1.4455

1.4376

1.4297

1.4219

1.4142

1.4066

1.3991

1.3916

1.3843

1.377

1.3698

1.3626

1.3556

1.3486

1.3416

1.3348

1.328

1.3213

1.3146

1.3081

1.3015

1.2951

1.2887

1.2824

1.2761

1.2699

1.2638

1.2577

1.2516

1.2457

1.2398

1.2339

1.2281

1.2224

1.2167

1.211

1.2054

1.1999

1.1944

1.189

1.1836

1.1782

1.1729

1.1677

1.1625

1.1573

1.1522

1.1472

1.1422

1.1372

1.1322

1.1274

1.1225

1.1177

1.1129

1.1082

1.1035

1.0989

1.0943

1.0897

1.0852

1.0807

1.0762

1.0718

1.0674

1.0631

1.0588

1.0545

1.0502

1.046

1.0419

1.0377

1.0336

1.0295

1.0255

1.0215

1.0175

1.0135

1.0096

1.0057

1.0019

0.998

0.9942

0.9905

0.9867

0.983

0.9793

0.9757

0.972

0.9684

0.9648

0.9613

0.9578

0.9543

0.9508

0.9473

0.9439

0.9405

0.9371

0.9338

0.9304

0.9271

0.9239

0.9206

0.9174

0.9142

0.911

0.9078

0.9047

0.9015

0.8984

0.8953

0.8923

0.8892

0.8862

0.8832

0.8803

0.8773

0.8744

0.8714

0.8685

0.8657

0.8628

f(kHz)

ReZ(MOhm/m)

Sheet1

55.1024

65.8654

76.5206

87.069

97.5153

107.8673

118.1342

128.326

138.453

148.5247

158.5501

168.537

178.4927

188.4232

198.3336

208.2283

218.1111

227.9849

237.8523

247.7154

257.5758

267.4349

277.2938

287.1533

297.0142

306.877

316.742

326.6096

336.4801

346.3536

356.2301

366.1098

375.9928

385.8789

395.7682

405.6606

415.5561

425.4546

435.3561

445.2605

455.1677

465.0776

474.9901

484.9052

494.8227

504.7427

514.6649

524.5894

534.5161

544.4448

554.3755

564.3081

574.2426

584.1789

594.1169

604.0566

613.9979

623.9408

633.8852

643.831

653.7782

663.7267

673.6766

683.6277

693.58

703.5335

713.4881

723.4438

733.4006

743.3584

753.3172

763.2769

773.2376

783.1991

793.1615

803.1248

813.0889

823.0537

833.0193

842.9857

852.9528

862.9205

872.889

882.8581

892.8278

902.7981

912.7691

922.7406

932.7127

942.6853

952.6585

962.6322

972.6063

982.581

992.5562

1002.5318

1012.5078

1022.4843

1032.4613

1042.4386

1052.4163

1062.3945

1072.373

1082.3519

1092.3312

1102.3108

1112.2908

1122.2711

1132.2517

1142.2327

1152.2139

1162.1955

1172.1774

1182.1595

1192.142

1202.1247

1212.1077

1222.091

1232.0745

1242.0583

1252.0423

1262.0266

1272.0111

1281.9959

1291.9808

1301.966

1311.9514

1321.937

1331.9229

1341.9089

1351.8951

1361.8815

1371.8682

1381.855

1391.8419

1401.8291

1411.8165

1421.804

1431.7916

1441.7795

1451.7675

1461.7557

1471.744

1481.7325

1491.7211

1501.7099

1511.6988

1521.6879

1531.6771

1541.6664

1551.6559

1561.6455

1571.6352

1581.625

1591.615

1601.6051

1611.5953

1621.5857

1631.5761

1641.5667

1651.5574

1661.5482

1671.5391

1681.5301

1691.5212

1701.5124

1711.5037

1721.4951

1731.4866

1741.4782

1751.4699

1761.4617

1771.4535

1781.4455

1791.4376

1801.4297

1811.4219

1821.4142

1831.4066

1841.3991

1851.3916

1861.3843

1871.377

1881.3698

1891.3626

1901.3556

1911.3486

1921.3416

1931.3348

1941.328

1951.3213

1961.3146

1971.3081

1981.3015

1991.2951

2001.2887

2011.2824

2021.2761

2031.2699

2041.2638

2051.2577

2061.2516

2071.2457

2081.2398

2091.2339

2101.2281

2111.2224

2121.2167

2131.211

2141.2054

2151.1999

2161.1944

2171.189

2181.1836

2191.1782

2201.1729

2211.1677

2221.1625

2231.1573

2241.1522

2251.1472

2261.1422

2271.1372

2281.1322

2291.1274

2301.1225

2311.1177

2321.1129

2331.1082

2341.1035

2351.0989

2361.0943

2371.0897

2381.0852

2391.0807

2401.0762

2411.0718

2421.0674

2431.0631

2441.0588

2451.0545

2461.0502

2471.046

2481.0419

2491.0377

2501.0336

2511.0295

2521.0255

2531.0215

2541.0175

2551.0135

2561.0096

2571.0057

2581.0019

2590.998

2600.9942

2610.9905

2620.9867

2630.983

2640.9793

2650.9757

2660.972

2670.9684

2680.9648

2690.9613

2700.9578

2710.9543

2720.9508

2730.9473

2740.9439

2750.9405

2760.9371

2770.9338

2780.9304

2790.9271

2800.9239

2810.9206

2820.9174

2830.9142

2840.911

2850.9078

2860.9047

2870.9015

2880.8984

2890.8953

2900.8923

2910.8892

2920.8862

2930.8832

2940.8803

2950.8773

2960.8744

2970.8714

2980.8685

2990.8657

3000.8628

Sheet1

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

f(kHz)

ReZ(MOhm/m)

Sheet2

Sheet3

Basic Parametersdamping of transverse injection oscillations(E + 0cB)ds 6.0 kV (Q - ?)feedback curing transverse coupled bunch instabilities(E + 0cB)ds 1.3 kVStrength of the kicker:(E + 0cB)ds 9.3 kVElectric kicker (L=0.5m, =10cm): U = 1.86 kV

JINR- CERN - GSI

Bandwidth and Frequenciesfmin= min|k - Q|f0 = 0.1f0 = 10.4 kHzfmax fb/2fmax (for kicker) 1/4t = 3.2 MHz (t=25ns)Bunch r.m.s. spectral frequency: = 1/2t = 6.4 MHzStability of high order harmonics - ?Sampling rate: 20MSPSTransverse emittance growth rate:-1 = (4/3) f0 2-2(b-1) Q2 = 84 hours (f0 = 104kHz; b=12-1; Q = 0.005)

JINR- CERN - GSI

SIS100 & SIS300 Dampers

JINR- CERN - GSI

KickerA fragment of an assembly drawing of a vertical kicker: 1 - the vacuum tank, 2 - electrodes, 3 - ceramic rings, 4 - the fixing device of the electrode module, 5 - the high voltage connection, 6 - a plate for installation of target alignment, 7 - the higher order mode connection. High voltage on electrodes: 1400 VBandwidth: 10 3200 kHzOperating vacuum: 510-12 mbar

JINR- CERN - GSI

Power AmplifierClass of operation: ABInput amplitude: 150 VOutput amplitude: 1400 VBandwidth: 10 3200 kHz

JINR- CERN - GSI

LHC Damper: investigationsof a cascode amplifierThe experimental results confirm a possibility of realisation of amplifier on the basis of the circuit with parallel control (cascode), which is considered as a perspective development of the system.

JINR- CERN - GSI

10k

1u

-135

RS2048-CJ

870V

870V

10k

-135

1u

50

50

RS2048-CJ

12kV

870V

out1

out2

10n

345nH

15p

90p

345nH

10n

90p

12kV

870V

kicker

25

25

Simulation

Test

Classic

Cascode (1 channel)

50

25

0

Gain, dB

Frequency, MHz

0.03

0.1

1

10

60

Driver AmplifierTop viewView on transformersFront viewRear viewClass of operation: AInput amplitude: 1 VOutput amplitude: 150 VBandwidth: 10 3200 kHz

JINR- CERN - GSI

Central Signal ProcessingField Programmable Gate Array (FRGA) technologyClock frequency: 8fRF 20MHzDigital input signal: 12 bitAnalog output amplitude: 1 VSignal processing resolution: 12 bitProgrammable delay: 3 - 10s, ++50nsFine delay: 1 50ns, ++1ns (??)

JINR- CERN - GSI

Dampers: Planned ScheduledesignconstructiontestingTFSkickeramplifierCSP

JINR- CERN - GSI

Costs EstimatesCosts Estimates for 4 units: 744000 Costs Estimates for 1 unit

JINR- CERN - GSI

The Transverse Damping Systems for the SIS100 & SIS300 Synchrotrons at the Facility of Antiproton and Ion Research (FAIR at GSI)Status (November 2004):Technical proposal was prepared by:Accelerator Development Group, Gesellschaft fr Schwerionenforschung mbH DarmstadtLaboratory of Particle Physics of the Joint Institute for Nuclear Research

JINR- CERN - GSI

LHC DamperTransverse Feedback System with a real-time digital signal processing:damping of transverse injection oscillations,feedback curing transverse coupled bunch instabilities,excitation of transverse oscillations for beam measurements and other applications.General LHC ParametersMachine Circumference: 26658.883 mBeam revolution frequency: 11.245 kHzBeam revolution time: 88.9sHorizontal tune at injection: QH=64.28Vertical tune at injection: QV=59.31

JINR- CERN - GSI

The LHC Transverse Damping System CERN Russia - JINRThe Damper is in the list of the systems that must operate already for first beam injection. Therefore the schedule of construction, installation and testing the Damper in the machine must be completed before November 2006.

JINR- CERN - GSI

LHC Damper.Layout of one transverse feedback system. There are four independent systems, one per plane (H/V) and beam.JINRs obligations:20 deflectors,40 amplifiers.

JINR- CERN - GSI

The LHC Transverse Damping System CERN Russia - JINR

Electrostatic kickerThe design stage was successfully completed at the Laboratory of Particle Physics (JINR) and its results were accepted by CERN. Modern simulation methods based on MicrosimPSpice and Inventor were used.Wideband amplifiers

JINR- CERN - GSI

The LHC Transverse Damping SystemAssembly of the amplifier and the kicker at the tests bench. LPP, October 2004.Final amplifier design

JINR- CERN - GSI

The LHC Transverse Damping SystemRadiophysical characteristics of the power amplifier: 7.5 kV; 10 kHz 10 MHz. LPP, JINR, 10-15 December 2004.

JINR- CERN - GSI

JINR- CERN - GSI

RuPACCascode amplifier