DIPAC2011 - List of Keywords (positron)

Paper	Title	Other Keywords	Page
MOPD14	Calibration of the Electrostatic Beam Position Monitors for VEPP-2000	vacuum, pick-up, electron, optics	68
	Yu. A. Rogovsky, I. Nesterenko BINP SB RAS, Novosibirsk, Russia
	The basic requirement for the VEPP-2000 Beam Position Monitor (BPM) is the measurement of the beam orbit with 0.1 mm precision. To improve the measurement accuracy, the response of the electrostatic BPMs (pickups) were mapped in the laboratory before they were installed in the VEPP-2000 ring. The wire method for the sensitivity calibration and position-to-signal mapping is used. The test stand consists of high frequency coaxial switches to select each pickup electrode, movable antenna to simulate the beam, signal source, spectrum analyzer to measure the pickup signals, and analysis software. This calibration showed possibility of required accuracy. During calibration the electrical center of the different BPMs was measured with respect to the mechanical center. Conversion between the BPM signal and the actual beam position is done by using polynomial expansions fit to the mapping data within ± 6 mm square. Results for these portions of the calibration are presented.
	Poster MOPD14 [0.393 MB]

MOPD40	Beam Measurements with Visible Synchrotron Light at VEPP-2000 Collider	controls, collider, diagnostics, electron	140
	Yu. A. Rogovsky, D.E. Berkaev, I. Koop, A.N. Kyrpotin, I. Nesterenko, A.L. Romanov, Y.M. Shatunov, D.B. Shwartz BINP SB RAS, Novosibirsk, Russia
	This paper describes beam diagnostics at VEPP-2000 collider, based on visible synchrotron light analysis. These beam instruments include: SR beamline and optics; acquisition tools and high resolution CCD cameras distributed around the storage ring to measure the transverse beam profile and its position in vacuum chamber; photomultiplier tubes (PMT) which enables beam current measurements. Some applications of these measurement systems and their measurement results are presented.
	Poster MOPD40 [0.599 MB]

MOPD68	Pickup Beam Measurement System at the VEPP-2000 Collider	collider, betatron, injection, controls	203
	Yu. A. Rogovsky, E.A. Bekhtenev BINP SB RAS, Novosibirsk, Russia
	This paper reviews the present state of electromagnetic beam position monitors (pickups) at VEPP-2000 collider. It includes descriptions of position monitors, typical interfaces for these monitors and their system characteristics (resolution, stability, bandwidth and problems or limitations) are discussed. The paper also reviews several types of diagnostic measurements using beam position monitors which are useful in improving accelerator operations.
	Poster MOPD68 [0.398 MB]

MOPD77	Broadband Digital Feedback System for the VEPP-4M Electron-Positron Collider	feedback, kicker, electron, betatron	224
	V.V. Oreshonok, V.V. Smaluk BINP SB RAS, Novosibirsk, Russia V.P. Cherepanov, V.V. Oreshonok, D.P. Sukhanov NSU, Novosibirsk, Russia
	To suppress the transverse instability, which is the main reason of beam current limitation at the VEPP-4M electron-positron collider, a digital bunch-by-bunch feedback system has been developed, installed and commissioned. The real-time data processing is performed by a special code running in an FPGA module. This provides high efficiency and flexibility of the system. During the system commissioning, a 3-times increase of the beam current injected into VEPP-4M was reached. The system design and data processing algorithms are described, the commissioning results are presented.

WEOB02	Experimental Comparison of Performance of Various Fluorescent Screens Applied for Relativistic Electron/Positron Beam Imaging	electron, diagnostics, booster, laser	558
	O.I. Meshkov, V.A. Kiselev, D.P. Sukhanov, A.N. Zhuravlev BINP SB RAS, Novosibirsk, Russia V.L. Dorokhov, V.V. Smaluk BINP, Novosibirsk, Russia E.N. Galashov Nikolayev Institute of Inorganic Chemistry, Novosibirsk, Russia
	Fluorescent screens are widely used for single-pass measurements of transverse beam profile at most of accelerator facilities. Great number of materials is now used for manufacture of fluorescent screens. The linearity, sensitivity and spatial resolution of the diagnostics depend on the choice of screen substance. We made an attempt to compare a linearity and relative light yield for few types of the fluorescent materials applied for screen manufacturing. A CCD-camera and photomultiplier tube record the light flux and 2D profile of the electron/positron beam image on the screen. Experiments were carried out with the electron/positron beam energy of 350 MeV and the beam charge of 0.1 – 100 pC.
	Slides WEOB02 [3.454 MB]

Paper

Title

Other Keywords

Page

MOPD14

Calibration of the Electrostatic Beam Position Monitors for VEPP-2000

vacuum, pick-up, electron, optics

68

Yu. A. Rogovsky, I. Nesterenko
BINP SB RAS, Novosibirsk, Russia

The basic requirement for the VEPP-2000 Beam Position Monitor (BPM) is the measurement of the beam orbit with 0.1 mm precision. To improve the measurement accuracy, the response of the electrostatic BPMs (pickups) were mapped in the laboratory before they were installed in the VEPP-2000 ring. The wire method for the sensitivity calibration and position-to-signal mapping is used. The test stand consists of high frequency coaxial switches to select each pickup electrode, movable antenna to simulate the beam, signal source, spectrum analyzer to measure the pickup signals, and analysis software. This calibration showed possibility of required accuracy. During calibration the electrical center of the different BPMs was measured with respect to the mechanical center. Conversion between the BPM signal and the actual beam position is done by using polynomial expansions fit to the mapping data within ± 6 mm square. Results for these portions of the calibration are presented.

Poster MOPD14 [0.393 MB]

MOPD40

Beam Measurements with Visible Synchrotron Light at VEPP-2000 Collider

controls, collider, diagnostics, electron

140

Yu. A. Rogovsky, D.E. Berkaev, I. Koop, A.N. Kyrpotin, I. Nesterenko, A.L. Romanov, Y.M. Shatunov, D.B. Shwartz
BINP SB RAS, Novosibirsk, Russia

This paper describes beam diagnostics at VEPP-2000 collider, based on visible synchrotron light analysis. These beam instruments include: SR beamline and optics; acquisition tools and high resolution CCD cameras distributed around the storage ring to measure the transverse beam profile and its position in vacuum chamber; photomultiplier tubes (PMT) which enables beam current measurements. Some applications of these measurement systems and their measurement results are presented.

Poster MOPD40 [0.599 MB]

MOPD68

Pickup Beam Measurement System at the VEPP-2000 Collider

collider, betatron, injection, controls

203

Yu. A. Rogovsky, E.A. Bekhtenev
BINP SB RAS, Novosibirsk, Russia

This paper reviews the present state of electromagnetic beam position monitors (pickups) at VEPP-2000 collider. It includes descriptions of position monitors, typical interfaces for these monitors and their system characteristics (resolution, stability, bandwidth and problems or limitations) are discussed. The paper also reviews several types of diagnostic measurements using beam position monitors which are useful in improving accelerator operations.

Poster MOPD68 [0.398 MB]

MOPD77

Broadband Digital Feedback System for the VEPP-4M Electron-Positron Collider

feedback, kicker, electron, betatron

224

V.V. Oreshonok, V.V. Smaluk
BINP SB RAS, Novosibirsk, Russia
V.P. Cherepanov, V.V. Oreshonok, D.P. Sukhanov
NSU, Novosibirsk, Russia

To suppress the transverse instability, which is the main reason of beam current limitation at the VEPP-4M electron-positron collider, a digital bunch-by-bunch feedback system has been developed, installed and commissioned. The real-time data processing is performed by a special code running in an FPGA module. This provides high efficiency and flexibility of the system. During the system commissioning, a 3-times increase of the beam current injected into VEPP-4M was reached. The system design and data processing algorithms are described, the commissioning results are presented.

WEOB02

Experimental Comparison of Performance of Various Fluorescent Screens Applied for Relativistic Electron/Positron Beam Imaging

electron, diagnostics, booster, laser

558

O.I. Meshkov, V.A. Kiselev, D.P. Sukhanov, A.N. Zhuravlev
BINP SB RAS, Novosibirsk, Russia
V.L. Dorokhov, V.V. Smaluk
BINP, Novosibirsk, Russia
E.N. Galashov
Nikolayev Institute of Inorganic Chemistry, Novosibirsk, Russia

Fluorescent screens are widely used for single-pass measurements of transverse beam profile at most of accelerator facilities. Great number of materials is now used for manufacture of fluorescent screens. The linearity, sensitivity and spatial resolution of the diagnostics depend on the choice of screen substance. We made an attempt to compare a linearity and relative light yield for few types of the fluorescent materials applied for screen manufacturing. A CCD-camera and photomultiplier tube record the light flux and 2D profile of the electron/positron beam image on the screen. Experiments were carried out with the electron/positron beam energy of 350 MeV and the beam charge of 0.1 – 100 pC.

Slides WEOB02 [3.454 MB]