IBIC2012 - List of Keywords (gun)

Paper	Title	Other Keywords	Page
MOPB60	Beam Diagnostics for AREAL RF Photogun Linac	diagnostics, linac, electron, emittance	212
	K. Manukyan, G.A. Amatuni, B. Grigoryan, V. Sahakyan, A. Sargsyan, G.S. Zanyan CANDLE, Yerevan, Armenia
	Advanced Research Electron Accelerator Laboratory (AREAL) based on photocathode RF gun is under construction at CANDLE. The basic approach to the new facility is the photocathode S-band RF electron gun followed by two 1 m long S-band travelling wave accelerating sections. Linac will operate in single bunch mode with final beam energy up to 20 MeV and the bunch charge 10 - 200 pC. In this paper the main approaches and characteristics of transverse and longitudinal beam diagnostics are presented.

MOPB73	Beam Size and Intensity Diagnostics for a SRF Photoelectron Injector	electron, cathode, solenoid, scattering	241
	R. Barday, A. Jankowiak, T. Kamps, A.N. Matveenko, M. Schenk, J. Völker HZB, Berlin, Germany F. Siewert BESSY GmbH, Berlin, Germany J. Teichert HZDR, Dresden, Germany
	Funding: Work supported by Bundesministerium für Bildung und Forschung and Land Berlin A high brightness photoelectron injector must be developed as a part of the BERLinPro program. The injector is designed to produce an electron beam with 100 mA average current and a normalized emittance of 1 mm*mrad. The project will be realized in two stages. First with a Pb cathode in a SRF gun, work ongoing, followed by a normal conducting CsK2Sb cathode capable of generating high current beams. In the first stage we have measured the fundamental beam parameters bunch charge, beam energy and energy spread with a special focus on the measurement of the transverse beam profiles. We also discuss our plans for the beam characterization at high currents.

TUPB48	Beam Instrumentation for the COSY Electron Cooler	electron, detector, laser, controls	468
	V. Kamerdzhiev, L.J. Mao, K. Reimers FZJ, Jülich, Germany E.A. Bekhtenev, V.N. Bocharov, M.I. Bryzgunov, A.V. Bubley, A.P. Denisov, G.V. Karpov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva BINP SB RAS, Novosibirsk, Russia J. Dietrich HIM, Mainz, Germany
	The report deals with beam instrumentation of the electron cooler for COSY storage ring. The electron cooler is an electrostatic accelerator designed for beam energy up to 2 MeV and electron current up to 3 A with recuperation. The electron beam is immersed in longitudinal magnetic field so the electron motion is strongly magnetized. The control electrode in the electron gun is composed of four electrically isolated sectors. Applying AC voltage to one sector allows tracing of motion of that particular part of the beam. The electron beam shape is registered with the combination of 4-sector electron gun and the BPMs. This method allows observing both dipole and quadruple (galloping) modes of electron beam oscillation. Compass probe for measuring and tuning the direction of magnetic field in the cooling section is described. A profile monitor based on a few small Faraday cups for measuring distribution of the electron beam is presented.

TUPB51	Gatling Gun Test Stand Instrumentation	electron, cathode, diagnostics, emittance	474
	D.M. Gassner, I. Ben-Zvi, J.C. Brutus, C. Liu, M.G. Minty, A.I. Pikin, O.H. Rahman, E.J. Riehn, J. Skaritka, E. Wang BNL, Upton, Long Island, New York, USA
	In order to reach the design eRHIC luminosity 50mA of polarized electron current is needed. This is far beyond what the present state-of-the-art polarized electron cathode can deliver. A high average polarized current injector based on the Gatling Gun principle is being designed. This technique will employ multiple cathodes and combine their multiple bunched beams along the same axis. A proof-of-principle test bench will be constructed that includes a 220 keV Gatling Gun, beam combiner, diagnostics station, and collector. The challenges for the instrumentation systems and the beam diagnostics that will measure current, profile, position, and halo will be described.

THCB01	Electron-Lens Test Stand Instrumentation Progress	electron, laser, instrumentation, cathode	602
	T.A. Miller, J.N. Aronson, D.M. Gassner, X. Gu, A.I. Pikin, P. Thieberger BNL, Upton, Long Island, New York, USA
	Funding: Work supported by B.S.A, LLC under contract No. DE-AC02-98CH10886 with the U.S. Department of Energy. In preparation for installation of Electron Lenses into RHIC, planned for late 2012, a working test stand is in use testing the performance of the gun, collector, modulator, instrumentation and controls. While testing & operating the instrumentation, both progress and pitfalls were encountered. Results are presented from issues including ground loop signals generated by the DCCTs, static magnetic field interference, competing YAG screen illumination techniques, YAG crystal damage during beam operation, performance of the four quadrant beam scraper electrodes, and challenges in measuring beam current in conductors. Working knowledge and insight into each of these systems has been gained through difficulties leading to success. These insights are presented with supporting data and images.
	Slides THCB01 [32.453 MB]

Paper

Title

Other Keywords

Page

MOPB60

Beam Diagnostics for AREAL RF Photogun Linac

diagnostics, linac, electron, emittance

212

K. Manukyan, G.A. Amatuni, B. Grigoryan, V. Sahakyan, A. Sargsyan, G.S. Zanyan
CANDLE, Yerevan, Armenia

Advanced Research Electron Accelerator Laboratory (AREAL) based on photocathode RF gun is under construction at CANDLE. The basic approach to the new facility is the photocathode S-band RF electron gun followed by two 1 m long S-band travelling wave accelerating sections. Linac will operate in single bunch mode with final beam energy up to 20 MeV and the bunch charge 10 - 200 pC. In this paper the main approaches and characteristics of transverse and longitudinal beam diagnostics are presented.

MOPB73

Beam Size and Intensity Diagnostics for a SRF Photoelectron Injector

electron, cathode, solenoid, scattering

241

R. Barday, A. Jankowiak, T. Kamps, A.N. Matveenko, M. Schenk, J. Völker
HZB, Berlin, Germany
F. Siewert
BESSY GmbH, Berlin, Germany
J. Teichert
HZDR, Dresden, Germany

Funding: Work supported by Bundesministerium für Bildung und Forschung and Land Berlin
A high brightness photoelectron injector must be developed as a part of the BERLinPro program. The injector is designed to produce an electron beam with 100 mA average current and a normalized emittance of 1 mm*mrad. The project will be realized in two stages. First with a Pb cathode in a SRF gun, work ongoing, followed by a normal conducting CsK2Sb cathode capable of generating high current beams. In the first stage we have measured the fundamental beam parameters bunch charge, beam energy and energy spread with a special focus on the measurement of the transverse beam profiles. We also discuss our plans for the beam characterization at high currents.

TUPB48

Beam Instrumentation for the COSY Electron Cooler

electron, detector, laser, controls

468

V. Kamerdzhiev, L.J. Mao, K. Reimers
FZJ, Jülich, Germany
E.A. Bekhtenev, V.N. Bocharov, M.I. Bryzgunov, A.V. Bubley, A.P. Denisov, G.V. Karpov, V.M. Panasyuk, V.V. Parkhomchuk, V.B. Reva
BINP SB RAS, Novosibirsk, Russia
J. Dietrich
HIM, Mainz, Germany

The report deals with beam instrumentation of the electron cooler for COSY storage ring. The electron cooler is an electrostatic accelerator designed for beam energy up to 2 MeV and electron current up to 3 A with recuperation. The electron beam is immersed in longitudinal magnetic field so the electron motion is strongly magnetized. The control electrode in the electron gun is composed of four electrically isolated sectors. Applying AC voltage to one sector allows tracing of motion of that particular part of the beam. The electron beam shape is registered with the combination of 4-sector electron gun and the BPMs. This method allows observing both dipole and quadruple (galloping) modes of electron beam oscillation. Compass probe for measuring and tuning the direction of magnetic field in the cooling section is described. A profile monitor based on a few small Faraday cups for measuring distribution of the electron beam is presented.

TUPB51

Gatling Gun Test Stand Instrumentation

electron, cathode, diagnostics, emittance

474

D.M. Gassner, I. Ben-Zvi, J.C. Brutus, C. Liu, M.G. Minty, A.I. Pikin, O.H. Rahman, E.J. Riehn, J. Skaritka, E. Wang
BNL, Upton, Long Island, New York, USA

In order to reach the design eRHIC luminosity 50mA of polarized electron current is needed. This is far beyond what the present state-of-the-art polarized electron cathode can deliver. A high average polarized current injector based on the Gatling Gun principle is being designed. This technique will employ multiple cathodes and combine their multiple bunched beams along the same axis. A proof-of-principle test bench will be constructed that includes a 220 keV Gatling Gun, beam combiner, diagnostics station, and collector. The challenges for the instrumentation systems and the beam diagnostics that will measure current, profile, position, and halo will be described.

THCB01

Electron-Lens Test Stand Instrumentation Progress

electron, laser, instrumentation, cathode

602

T.A. Miller, J.N. Aronson, D.M. Gassner, X. Gu, A.I. Pikin, P. Thieberger
BNL, Upton, Long Island, New York, USA

Funding: Work supported by B.S.A, LLC under contract No. DE-AC02-98CH10886 with the U.S. Department of Energy.
In preparation for installation of Electron Lenses into RHIC, planned for late 2012, a working test stand is in use testing the performance of the gun, collector, modulator, instrumentation and controls. While testing & operating the instrumentation, both progress and pitfalls were encountered. Results are presented from issues including ground loop signals generated by the DCCTs, static magnetic field interference, competing YAG screen illumination techniques, YAG crystal damage during beam operation, performance of the four quadrant beam scraper electrodes, and challenges in measuring beam current in conductors. Working knowledge and insight into each of these systems has been gained through difficulties leading to success. These insights are presented with supporting data and images.

Slides THCB01 [32.453 MB]