V.M. Zhabitsky Joint Institute for Nuclear Research Dubna

BEAM STABILITY IN SYNCHROTRONS WITH DIGITAL TRANSVERSE FEEDBACK SYSTEMS

IN DEPENDENCE ON BEAM TUNES

V.M. ZhabitskyJoint Institute for Nuclear Research

Dubna

2

DK

BPM

Front Electronics

Digital Signal ProcessorDelay

Amplifier

DKBPM

DKBPM

DKBPM

Transverse Feedback System

31.08.2011 IX International Scientific Seminar in Memory of V.P. Sarantsev

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DK

BPM

31.08.2011 IX International Scientific Seminar in Memory of V.P. Sarantsev

IX International Scientific Seminar in Memory of V.P. Sarantsev 431.08.2011

IX International Scientific Seminar in Memory of V.P. Sarantsev 531.08.2011

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DK

BPM

Front Electronics

Digital Signal Processor

Delay

Amplifier

Basic Description of the Transverse Feedback System

31.08.2011

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BPM

Front Electronics

Digital Signal Processor

Delay Amplifier

Digital Transverse Feedback System

DK

31.08.2011

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BPM

Front Electronics

Digital Signal Processor

Delay Amplifier

Digital Transverse Feedback System

DK

31.08.2011

IX International Scientific Seminar in Memory of V.P. Sarantsev 931.08.2011

IX International Scientific Seminar in Memory of V.P. Sarantsev 1031.08.2011

TFS with Notch and FIR-1 FiltersTFS with Notch and Hilbert Filters

IX International Scientific Seminar in Memory of V.P. Sarantsev 1131.08.2011

TFS with Notch and Hilbert Filters TFS with Notch and FIR-1 Filters

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IX International Scientific Seminar in Memory of V.P. Sarantsev 1431.08.2011

LHC Damper (CERN, JINR)

V.Zhabitsky, W.Hӧfle et al. RuPAC 2010

IX International Scientific Seminar in Memory of V.P. Sarantsev 15

LHC Damper (CERN, JINR)

Single Bunch Operation Damping of Injection Errors

Damper ONDamper OFF

31.08.2011

V.Zhabitsky, W.Hӧfle et al. RuPAC 2010

IX International Scientific Seminar in Memory of V.P. Sarantsev 16

Feedback chain from pick-up Q7 to kicker H1 Feedback chain from pick-up Q9 to kicker H1

31.08.2011

LHC Damper (CERN, JINR)

Dn – contours for Transverse feedback system in the case of horizontal oscillations after injection (beam 1)

IX International Scientific Seminar in Memory of V.P. Sarantsev 1731.08.2011

LHC Damper (CERN, JINR)

Dn – contours for Transverse feedback system in the case of vertical oscillations after injection (beam 2)

without instability τinst = 200 Trev

IX International Scientific Seminar in Memory of V.P. Sarantsev 1831.08.2011

0 A 13 A 6.5 A 6.5 A

damper ON

vertical

horizontal

damper always switched on at turn 2000

Beam 2

31.08.2011 19IX International Scientific Seminar in Memory of V.P. Sarantsev

LHC Performance. S. Myers (CERN). LHCC. 15 June 2011

Check filamentation without damper, with octupoles on and off

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V.P. Sarantsev, I.N. Ivanov, 1991

JINR

31.08.2011

IX International Scientific Seminar in Memory of V.P. Sarantsev 2131.08.2011