THEME02-1-1068-2008/2008

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02-1-1068-2008/2008

Priority:

Status:

New

Physics and Engineering of Feedback Systems in Synchrotrons

Leader:	V.M. Zhabitsky
Deputy:	N.I. Lebedev

Scientific Programme:
High intensity beam stability and beam density increase are actual problems in accelerators. To stabilize high intensity beams against transverse instabilities and to damp beam injection errors the transverse feedback system (TFS) is used in synchrotrons. The TFS damper kicker corrects the transverse momentum of the bunch in accordance with its displacement from the closed orbit at the location of the beam position monitor. The resonance regime of TFS allows damping of particles coherent transverse oscillations initialized by random kicks due to noise and mismatch phenomena in the accelerator devices. The LHC Transverse Feedback System that was designed and constructed with participation of the JINR specialists in the last years is proposed to use for research studies of transverse beam dynamics and regimes of the LHC Damper aimed at obtaining the design and ultimate beam parameters in the LHC as well as for investigations of non-linear regimes of the transverse feedback syst ems, beam dynamics and noise issues. Participation of the JINR specialists in the beam commissioning and tests of the LHC Damper at the LHC machine is stipulated too.
Results of TFS research studies are planned to apply for designing and construction of feedback systems and powerful electronics for accelerators at JINR, including synchrotrons in framework of projects NUCLOTRON-M and NICA, and in partnership institutions.

Expected main results of R&D studies:

Researches on accelerator physics and engineering at the LHC Machine with the use of the LHC Damper.
Recommendations on application of transverse feedback systems in synchrotrons at JINR in framework of projects NUCLOTRON-M and NICA.
Application of specialised powerful wideband electronics in accelerators aimed at increasing of their efficiency at JINR and in partnership institutions.

Expected main results in 2008:

Tests of power amplifiers of the LHC Damper at CERN. Participation in the beam commissioning of the LHC Damper and its tests for optimization of the LHC Damper operation.
Research studies of TFS applications at the booster designed and the nuclotron modernized in framework of projects NUCLOTRON-M and NICA.
Investigation of transverse dynamics of a beam for damping of particlesT injection errors in the NICA synchrotrons and in the LHC. Joint research with GSI in framework of the SIS100 & SIS300 Dampers (FAIR, GSI).
Continuation of construction of the control and stabilizing systems for LIU-3000 electron linac at the LPP tests stand for CLIC (in accordance with the contract).

List of Activities

Activity or Experiment

Leader

Status

Research studies at the LHC machine with the use of the LHC Damper

V.M. Zhabitsky

Data analysis

Researches on Beam Dynamics
in Synchrotrons and on TFS
applications in synchrotrons
in framework of projects
NUCLOTRON-M and NICA

V.M. Zhabitsky

Simulation

Powerful and Wideband Electronics

N.I. Lebedev

Collaboration
Country or international organization	City	Institute or Laboratory
Bulgaria	Sofia	INRNE BAS
Germany	Darmstadt	GSI
Russia	Yekaterinburg	USTU-UPI
	Lesnoy	Elektrokhimpribor
CERN	Geneva

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