RUPAC2012 - List of Keywords (damping)

Paper	Title	Other Keywords	Page
TUBCH01	Transient Beam Response in Synchrotrons with a Digital Transverse Feedback System	feedback, kicker, synchrotron, resonance	73
	V. Zhabitsky JINR, Dubna, Moscow Region, Russia
	The transient beam response on an externally applied impulse force in synchrotrons with a digital transverse feedback system is studied. Experimental data from the LHC on damping of coherent transverse oscillations excited by the discrete-time unit impulse are analysed. Good agreement on the measured and theoretically predicted decrements has been obtained. A method of feedback fine tuning, based on measurements of bunch response on harmonic excitation impulse, is discussed.
	Slides TUBCH01 [5.652 MB]

THACH01	Indirect Cooled Superconductive Wiggler Magnet	wiggler, vacuum, cryogenics, ion	140
	K. Zolotarev BINP SB RAS, Novosibirsk, Russia
	Superconducting wigglers are very popular devices for generation of the synchrotron radiation in the hard X-ray spectral range. The one direction of the future progress in wigglers development is reducing of the technical complexity wigglers design as well as technical service for cryogenic system. The BINP wigglers without liquid helium consumption were a noticeable milestone of these efforts. The next significant step toward additional simplification wiggler design and service is indirect cooling of the wiggler magnet. In this case the wiggler magnet not sinked into the liquid helium, but cooled by thermal connection link with the head of cryogenic cooler. This approach is used for design of the indirect cooled wiggler for IMAGE beamline on the ANKA light source (KIT, Germany). This wiggler also will be tested as a prototype for damping wiggler for the damping rings in the project of the Compact Linear Collider (CLIC) for CERN. This report summarizes some details of the wiggler design as well as a result of the short prototype testing.
	Slides THACH01 [3.073 MB]

FRBCH05	Application of Small-Sized Vacuum Accelerating Tubes for Neutron Control of Increasing Debit of Oil Wells by Acoustic Influence of the Formation	neutron, controls, monitoring, background	233
	D.R. Khasaya, B.Y. Bogdanovich, A.V. Ilyinsky, A. Nesterovich, A.E. Shikanov, E.A. Shikanov MEPhI, Moscow, Russia
	The report presents experimental studies results of the possibility using the technique of neutron "labeled" reagent (NaCl) for monitoring of the acoustic influence (AI) results in the oil reservoir to increase oil production debits. These obtained data allow us to estimate the effectiveness of acoustic influence the method on managed oil reservoirs in conjunction with the equipment which pulsed neutron-neutron ray logging based on vacuum accelerator tubes that implements the method of neutron "labeled" reagent. The proposed instrumental set ensures reliable process control stimulation of oil from the reservoir and the allocation of layers to abnormal filtration and capacitive properties and their subsequent development.

TUPPB031	Measurement of Beam Parameters in the VEPP-5 Damping Ring Using Betatron Oscillations Decoherence	betatron, electron, positron, synchrotron	385
	A.V. Petrenko, K.V. Astrelina BINP SB RAS, Novosibirsk, Russia
	Funding: RFBR, grant N 09-02-00594-а The measurement of beam parameters during the commissioning of VEPP-5 Damping Ring is presented. Coherent betatron oscillations of the 380-MeV electron beam were induced by a fast kick. Electrostatic beam position monitors were used to obtain the turn-by-turn transverse beam position data. The form and behaviour of the envelope of oscillations are determined by the beam parameters, chromaticity and nonlinear detuning. Beam emittance and energy spread values have been obtained from the analysis of the beam envelope, nonlinear detuning and chromaticity measurements. The results are in a good agreement with theoretical predictions which were made for calibrated model of the Damping Ring. Independent analysis of betatron spectra envelope have been performed for energy spread measurements as well.

WEPPD021	HTS Wiggler Concept for a Damping Ring	wiggler, multipole, dynamic-aperture, radiation	599
	A.V. Smirnov RadiaBeam, Santa Monica, USA A.A. Mikhailichenko CLASSE, Ithaca, New York, USA
	A new design for the proposed ILC damping ring (DR) is based on 2G HTS cabling technology applied to the DC windings with yoke and mu-metal-shimmed pole to achieve ~2 T high-quality field within a 86 mm gap and 32-40 cm period. Low levels of current densities (~90-100 A/mm²) provide a robust, reliable operation of the wiggler at higher heat loads, up to LN₂ temperatures with long leads, enhanced flexibility for cryostats and infrastructure in harsh radiation environment, and reduced failure rate compared to the baseline SC ILC DR wiggler design at very competitive cost.

WEPPD046	Digital Delay-Line Periodic FIR Filter Layout of Transverse Feedback in the U70	feedback, pick-up, betatron, kicker	647
	O.P. Lebedev, N.A. Ignashin, S.V. Ivanov, S.E. Sytov IHEP, Moscow Region, Russia
	A novel architecture of the wide-band transverse feedback system was successfully beam-tested in the U70 proton synchrotron of IHEP-Protvino. It employs a finite-time impulse response (FIR) non-recursive filter layout based on 3 (or 4, optionally) variable (10%) multi-turn digital delay lines. Apart of using these natural-to-DSP components, the configuration involved has, at least, two operational advantages: (1) A single beam pickup layout plus acceptability of an arbitrary betatron phase advance between pickup and kicker. (2) A straightforward rejection of hampering DC and higher rotation frequency harmonic signals from beam position readouts. The latter occurs due to a periodic notch nature inherent in the amplitude-frequency in-out open-loop feedback transfer function. The paper reports on technical solutions implemented, problem-oriented R&D studies, and beam observations.

Paper

Title

Other Keywords

Page

TUBCH01

Transient Beam Response in Synchrotrons with a Digital Transverse Feedback System

feedback, kicker, synchrotron, resonance

73

V. Zhabitsky
JINR, Dubna, Moscow Region, Russia

The transient beam response on an externally applied impulse force in synchrotrons with a digital transverse feedback system is studied. Experimental data from the LHC on damping of coherent transverse oscillations excited by the discrete-time unit impulse are analysed. Good agreement on the measured and theoretically predicted decrements has been obtained. A method of feedback fine tuning, based on measurements of bunch response on harmonic excitation impulse, is discussed.

Slides TUBCH01 [5.652 MB]

THACH01

Indirect Cooled Superconductive Wiggler Magnet

wiggler, vacuum, cryogenics, ion

140

K. Zolotarev
BINP SB RAS, Novosibirsk, Russia

Superconducting wigglers are very popular devices for generation of the synchrotron radiation in the hard X-ray spectral range. The one direction of the future progress in wigglers development is reducing of the technical complexity wigglers design as well as technical service for cryogenic system. The BINP wigglers without liquid helium consumption were a noticeable milestone of these efforts. The next significant step toward additional simplification wiggler design and service is indirect cooling of the wiggler magnet. In this case the wiggler magnet not sinked into the liquid helium, but cooled by thermal connection link with the head of cryogenic cooler. This approach is used for design of the indirect cooled wiggler for IMAGE beamline on the ANKA light source (KIT, Germany). This wiggler also will be tested as a prototype for damping wiggler for the damping rings in the project of the Compact Linear Collider (CLIC) for CERN. This report summarizes some details of the wiggler design as well as a result of the short prototype testing.

Slides THACH01 [3.073 MB]

FRBCH05

Application of Small-Sized Vacuum Accelerating Tubes for Neutron Control of Increasing Debit of Oil Wells by Acoustic Influence of the Formation

neutron, controls, monitoring, background

233

D.R. Khasaya, B.Y. Bogdanovich, A.V. Ilyinsky, A. Nesterovich, A.E. Shikanov, E.A. Shikanov
MEPhI, Moscow, Russia

The report presents experimental studies results of the possibility using the technique of neutron "labeled" reagent (NaCl) for monitoring of the acoustic influence (AI) results in the oil reservoir to increase oil production debits. These obtained data allow us to estimate the effectiveness of acoustic influence the method on managed oil reservoirs in conjunction with the equipment which pulsed neutron-neutron ray logging based on vacuum accelerator tubes that implements the method of neutron "labeled" reagent. The proposed instrumental set ensures reliable process control stimulation of oil from the reservoir and the allocation of layers to abnormal filtration and capacitive properties and their subsequent development.

TUPPB031

Measurement of Beam Parameters in the VEPP-5 Damping Ring Using Betatron Oscillations Decoherence

betatron, electron, positron, synchrotron

385

A.V. Petrenko, K.V. Astrelina
BINP SB RAS, Novosibirsk, Russia

Funding: RFBR, grant N 09-02-00594-а
The measurement of beam parameters during the commissioning of VEPP-5 Damping Ring is presented. Coherent betatron oscillations of the 380-MeV electron beam were induced by a fast kick. Electrostatic beam position monitors were used to obtain the turn-by-turn transverse beam position data. The form and behaviour of the envelope of oscillations are determined by the beam parameters, chromaticity and nonlinear detuning. Beam emittance and energy spread values have been obtained from the analysis of the beam envelope, nonlinear detuning and chromaticity measurements. The results are in a good agreement with theoretical predictions which were made for calibrated model of the Damping Ring. Independent analysis of betatron spectra envelope have been performed for energy spread measurements as well.

WEPPD021

HTS Wiggler Concept for a Damping Ring

wiggler, multipole, dynamic-aperture, radiation

599

A.V. Smirnov
RadiaBeam, Santa Monica, USA
A.A. Mikhailichenko
CLASSE, Ithaca, New York, USA

A new design for the proposed ILC damping ring (DR) is based on 2G HTS cabling technology applied to the DC windings with yoke and mu-metal-shimmed pole to achieve ~2 T high-quality field within a 86 mm gap and 32-40 cm period. Low levels of current densities (~90-100 A/mm²) provide a robust, reliable operation of the wiggler at higher heat loads, up to LN₂ temperatures with long leads, enhanced flexibility for cryostats and infrastructure in harsh radiation environment, and reduced failure rate compared to the baseline SC ILC DR wiggler design at very competitive cost.

WEPPD046

Digital Delay-Line Periodic FIR Filter Layout of Transverse Feedback in the U70

feedback, pick-up, betatron, kicker

647

O.P. Lebedev, N.A. Ignashin, S.V. Ivanov, S.E. Sytov
IHEP, Moscow Region, Russia

A novel architecture of the wide-band transverse feedback system was successfully beam-tested in the U70 proton synchrotron of IHEP-Protvino. It employs a finite-time impulse response (FIR) non-recursive filter layout based on 3 (or 4, optionally) variable (10%) multi-turn digital delay lines. Apart of using these natural-to-DSP components, the configuration involved has, at least, two operational advantages: (1) A single beam pickup layout plus acceptability of an arbitrary betatron phase advance between pickup and kicker. (2) A straightforward rejection of hampering DC and higher rotation frequency harmonic signals from beam position readouts. The latter occurs due to a periodic notch nature inherent in the amplitude-frequency in-out open-loop feedback transfer function. The paper reports on technical solutions implemented, problem-oriented R&D studies, and beam observations.