DIPAC2011 - List of Authors (Sukhanov, D.P.)

Paper

Title

Page

Installation for Measurements of Secondary Emission Yield and Electron Cloud Lifetime in Magnetic Field

236

A.A. Krasnov, V.V. Anashin, V.K. Ovchar, V.V. Smaluk, D.P. Sukhanov
BINP SB RAS, Novosibirsk, Russia

An experimental setup for investigations of electron-surface interaction and electron cloud behavior is under commissioning at BINP. The proposed method provides direct measurements of secondary emission yield and electron clouds lifetime in the presence of strong magnetic field. In principle, the experiments can be performed at cryogenic temperatures. The experimental data will help to figure out the process of reflection of low energy electrons from a metal surface and can be useful for improvement of computer codes developed for simulation of electron clouds behavior in a cold beam pipe of particle accelerators. The structure and performance capabilities of the setup are described, first experimental results are presented.

WEOB02

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

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]

MOPD77

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

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.

Paper	Title	Page
MOPD82	Installation for Measurements of Secondary Emission Yield and Electron Cloud Lifetime in Magnetic Field	236
	A.A. Krasnov, V.V. Anashin, V.K. Ovchar, V.V. Smaluk, D.P. Sukhanov BINP SB RAS, Novosibirsk, Russia
	An experimental setup for investigations of electron-surface interaction and electron cloud behavior is under commissioning at BINP. The proposed method provides direct measurements of secondary emission yield and electron clouds lifetime in the presence of strong magnetic field. In principle, the experiments can be performed at cryogenic temperatures. The experimental data will help to figure out the process of reflection of low energy electrons from a metal surface and can be useful for improvement of computer codes developed for simulation of electron clouds behavior in a cold beam pipe of particle accelerators. The structure and performance capabilities of the setup are described, first experimental results are presented.

WEOB02	Experimental Comparison of Performance of Various Fluorescent Screens Applied for Relativistic Electron/Positron Beam Imaging	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]

MOPD77	Broadband Digital Feedback System for the VEPP-4M Electron-Positron Collider	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.