IPAC2013 - List of Keywords (ion-source)

Paper	Title	Other Keywords	Page
MOPEA064	A New Long Pulse High Voltage Extraction Power Supply for FETS	extraction, power-supply, high-voltage, ion	228
	D.C. Faircloth, S.R. Lawrie, M. Perkins STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	A new 25 kV 2 ms 50 Hz extraction voltage power supply has been developed for the high performance H-minus ion source for the Front End Test Stand at the Rutherford Appleton Laboratory. The power supply has been designed to fit in a single 19 inch rack and has a modular design for easy maintenance. This paper details the design and performance of the power supply and extracted beam currents.

MOPEA065	Commissioning of the Ion Source for Siemens Novel Electrostatic Accelerator	ion, plasma, extraction, electron	231
	H. von Jagwitz-Biegnitz JAI, Oxford, United Kingdom P. Beasley, O. Heid Siemens AG, Erlangen, Germany D.C. Faircloth STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom A.J. Holmes Marcham Scientific Ltd, Hungerford, United Kingdom R.G. Selway Inspired Engineering Ltd, Climping, United Kingdom B. Singh, E. Zitvogel BNL, Upton, New York, USA
	Siemens is developing a novel compact DC electrostatic tandem accelerator and currently building a prototype. A dedicated H⁻ ion source for this accelerator has been designed and built. This paper reports on some of the design features as well as results of the commissioning phase of this filament driven DC multicusp volume H⁻ ion source. Stable H⁻ currents of more then 300 μA at 10 keV have been extracted. This satisfies the beam current requirement of the novel accelerator.

MOPFI027	The Progress of the BRISOL Facility at CIAE	ion, target, vacuum, diagnostics	339
	B. Tang, L.H. Chen, B.Q. Cui, Q.H. Huang, W. Jiang, R. Ma, Y.J. Ma, Z. Peng CIAE, Beijing, People's Republic of China
	Beijing Radioactive Ion-beam Facilities Isotope Separator On-Line (BRISOL), aiming to generate short life radioactive ion beam (RIB) on-line, is being constructed at China Institute of Atomic Energy(CIAE). Up to now, construction of major equipment for BRISOL is completed, including ion source, vacuum system, separator, optical element, and beam diagnostic system, and assembling is underway in laboratory. The on-site installation of all the beam line will be carried out soon. All the major element prototype including surface ion source, quadrupole, hexapole, multipole and beam diagnostic system have been studied off-line on a test-bench for BRISOL. A Li beam was generated and separated . The primary tests show that the ion source and the optical elements work well. The test charge exchange cell (CEC) is under way. BRISOL will be commissioned next year.

MOPFI029	The Construction Progress of Beijing Radioactive Ion-beam Facility	ion, cyclotron, ISOL, vacuum	345
	T.J. Zhang, Shizhong. An, B.Q. Cui, Z.G. Li, Y.L. Lu, C.H. Peng, F. Yang CIAE, Beijing, People's Republic of China
	The Beijing Radioactive Ion-Beam Facility (BRIF) is being constructed at CIAE. The project consists of a 100 MeV high intensity cyclotron CYCIAE-100, an ISOL system with a mass resolution of 20000, and a superconducting booster. The construction of the building was started on April 28, 2011 and the roof was sealed on Jan. 16, 2012. The on-site installation conditions have been ready since Sept. 27, 2012. Up to now, the fabrication of all major components for CYCIAE-100 have been completed, including the main magnet system, the RF system, ion source and injection, main vacuum, etc. The equipment fabrication for the ISOL system has been completed and magnetic mapping and shimming is being performed on the large-scale analysis magnet. The fabrication of the major components for the superconducting booster has been accomplished, and the work on copper-niobium sputtering is under way. At present, the installation and assembly is in full swing and the beam commissioning is to predicted to be finished in mid 2013. Taking advantage of the experiences accumulated on the CRM cyclotron with beam up to 430 uA, it is likely that the first beams of 100 MeV can be achieved by the end of 2013.

MOPFI033	Commissioning Results and Progress of a Helium Injector for Coupled RFQ and SFRFQ Project at Peking University	ion, rfq, emittance, cavity	357
	J. Chen, J.E. Chen, S.L. Gao, Z.Y. Guo, Y.T. Luo, S.X. Peng, H.T. Ren, Z. Wang, Z.H. Wang, W.L. Xia, Y. Xu, A.L. Zhang, T. Zhang, J. Zhao PKU, Beijing, People's Republic of China
	At Peking University (PKU) a new helium injector for coupled radio frequency quadrupole(RFQ) and separated function radio frequency quadrupole(SFRFQ) within one cavity, so called as coupled RFQ & SFRFQ, was designed recently. It will provide a 30keV 20mA He⁺ beam whose emittance is less than 0.15 π.mm.mrad for the accelerator. It is a combination of a 2.45GHz PKU PMECRIS (Permanent Magnet ECRIS) and a 1.16 m long LEBT. Within the 1.16 m LEBT, 2 solenoids, 2 steering magnets, a kicker, a space charge compensation section, a collimator, two vacuum valves, a Faraday cup and an ACCT are installed. The manufacture has been completed and the commissioning is on the way. In this paper we will address the commissioning results and its progress. Haitao Ren, et al., A Helium Injector for Coupled RFQ and SFRFQ Cavity Project at Peking University. Proc. LINAC’12, Paper TUPB034, Israel, 2012

MOPFI034	First Intense H⁻ Beam Generated by a Microwave-driven Pure Volume Source	ion, electron, plasma, extraction	360
	S.X. Peng, J. Chen, J.E. Chen, Z.Y. Guo, H.T. Ren, Zh.W. Wang, Y. Xu, T. Zhang PKU, Beijing, People's Republic of China A.L. Zhang Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China J. Zhao State Key Laboratory of Nuclear Physics and Technology, Beijing, Haidian District, People's Republic of China
	The 2.45 GHz Electron cyclotron resonance (ECR) plasma generators have demonstrated their efficiency, reproducibility on producing H⁺, D⁺, O+, N+, He+, Ar+* and He2+ at Peking University(PKU). Recently, modifications on magnet field configuration, discharge chamber structure and extraction system have been done to set-up a microwave-driven pure volume H⁻ ion source. First experiment was done on PKU ion source test bench at the beginning of Nov, 2012. A 15 mA H⁻ ion beam has been produced at 40 keV by this prototype source. This paper describes the source principle and design in detail and reports on the current status of the development work. * H. T. Ren, S. X. Peng*, P. N. Lu, S. Yan, Q. F. Zhou, J. Zhao, Z. X. Yuan, Z. Y. Guo and J. E. Chen, Rev. Sci. Instrum. 83, 02B905 (2012)

MOPFI035	Preliminary Results of H²⁺ Beam Generated by a 2.45 GHz Permanent Magnet ECR Ion Source at PKU	ion, plasma, permanent-magnet, cyclotron	363
	Y. Xu, J. Chen, J.E. Chen, Z.Y. Guo, Y.T. Luo, S.X. Peng, H.T. Ren, Z.H. Wang, T. Zhang, J. Zhao PKU, Beijing, People's Republic of China A.L. Zhang Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China
	Recently, the need to build an ion source generating high current hydrogen molecular ion H²⁺ beam has been growing rapidly. For example, H²⁺ ion can be used as a pilot beam of the intense deuteron beam during the commission phase of linear accelerators to minimize the activation of components. And it is an effective way to improve the output current of cyclotrons by accelerating H²⁺ and stripping it into H⁺ at the exit of accelerator, instead of accelerating H⁺ beam directly. To obtain high-yield H²⁺ ion beam, experimental and theoretical study was carried out on the 2.45 GHz Peking University permanent magnet electron cyclotron resonance ion source (PKU PMECR). With PMECR II, studies on the size of discharge chamber and the operation pressure were carried out to increase H²⁺ ion fraction. Beam analysis results prove that the H²⁺ can reach 40.5% with suitable operation parameters. More details will be presented in this paper. Zhizhong Song, Shixiang Peng et al., Rev. Sci. Instrum. 77, 03A305 (2006) ** Author to whom correspondence should be addressed. Electronic mail: sxpeng@pku.edu.cn.

MOPFI047	Analysis and Design of Matching Unit for a RF Driven Plasma Source for Fusion Purpose	plasma, impedance, ion, neutral-beams	389
	H.K. Yue Huazhong University of Science and Technology(HUST), Wuhan, People's Republic of China D.Z. Chen, M. Fan, J. Huang, D. Li, X.F. Li, K.F. Liu, C.R. Wan, C. Zhou HUST, Wuhan, People's Republic of China
	A RF driven plasma exciter for producing negative ions, aiming for heating and current drive neutral beam injectors for fusion applications, is in developing in Huazhong University of Science and Technology (HUST). In order to couple the maximum RF power to the source, the matching unit is designed to match the impedance of the source to that of the RF coaxial line. Firstly, a FEM model was built to estimate the equivalent circuit parameters of the source. Numerical predictions were compared with a small experimental setup to verify the accuracy of the fem model. Based on the numerical results, the RF coil and the matching components were carefully designed. Finally, the matching circuit for the source is developed and tested. Experimental results will be presented in the full paper.

MOPFI071	High Power Cyclotrons for the Neutrino Experiments DAEδALUS and IsoDAR	cyclotron, ion, proton, electron	446
	R.J. Barlow, A. Bungau, A.M. Kolano University of Huddersfield, Huddersfield, United Kingdom A. Adelmann PSI, Villigen PSI, Switzerland J.R. Alonso LBNL, Berkeley, California, USA W.A. Barletta, A. Calanna, D. Campo, J.M. Conrad MIT, Cambridge, Massachusetts, USA L. Calabretta INFN/LNS, Catania, Italy F. Méot BNL, Upton, Long Island, New York, USA H.L. Owen UMAN, Manchester, United Kingdom M. Shaevitz Columbia University, New York, USA
	DAEδALUS (Decay At rest Experiment for δ_cp At a Laboratory for Underground Science) has been proposed to measure the value of the CP violating phase delta through the oscillation of low energy muon anti-neutrinos to electron antineutrinos. With a single large detector, three accelerators at different distances enable the oscillation to be measured with sufficient accuracy. We have proposed the superconducting multi-megawatt DAEδALUS Supercinducting Ring Cyclotron (DSRC) as the means of producing the 800 MeV 12 mA protons required, through the acceleration of H₂⁺, ions with highly efficient stripping extraction. The DSRC comprises twin ion sources and injector cyclotrons, followed by a booster. The injector cyclotron can also be used for a separate experiment, IsoDAR (Isotope Decay At Rest) in which low energy protons produce Lithium 8, and thus a very pure electron antineutrino source which can be used to measure, or rule out, short range oscillation to a sterile neutrino. We describe recent developments in the designs of the injector and the booster, and the prospects for the two experiments.

MOPWA062	Transverse Beam Halo Measurements at High Intensity Neutrino Source (HINS) using Vibrating Wire Monitor	ion, target, proton, linac	819
	M. Chung, B.M. Hanna, V.E. Scarpine, V.D. Shiltsev, J. Steimel Fermilab, Batavia, USA S. Artinian BERGOZ Instrumentation, Saint Genis Pouilly, France S.G. Arutunian ANSL, Yerevan, Armenia
	Funding: Research supported by the U.S. Department of Energy. Measurement and control of transverse beam halo will be critical for the applications of future high-intensity hadron linacs. In particular, beam profile monitors require a very high dynamic range when using for transverse beam halo measurements. In this study, the Vibrating Wire Monitor (VWM) with aperture 60 mm was installed at the High Intensity Neutrino Source (HINS) front-end to measure transverse beam halo. A vibrating wire is excited at its resonance frequency with the help of a magnetic feedback loop, and the vibrating and sensitive wires are connected through a balanced arm. The sensitive wire is moved into the beam halo region by a stepper motor controlled translational stage. We study the feasibility of the vibrating wire for transverse beam halo measurements in the low-energy front-end of the proton linac.

MOPWO014	Numerical Methods to the Space Charge Compensation (SCC) Effect of the LEBT Beam	electron, ion, space-charge, simulation	915
	S.X. Peng, J. Chen, J.E. Chen, Z.Y. Guo, P.N. Lu, Y.T. Luo, H.T. Ren, Z.H. Wang, Y. Xu, T. Zhang, J. Zhao PKU, Beijing, People's Republic of China A.L. Zhang Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China
	Numerical simulation as well as experimental researches on space charge compensation for high intensity, low energy ion beam has been done at Peking University (PKU). In this paper we will describe the simulation model proposed at PKU and use it on the PKU ECR single-charged ion source. It consists of a new concept of equivalent density and more consideration of physical process. A series of arithmetical equations is gained through theoretical derivation. Although no numerical solutions have been carried out from our computation, it is foreseeable that the final result will be achieved soon.

TUPWA066	Space Charge Neutralization of Low Energy H⁻ Beam	emittance, space-charge, simulation, ion	1856
	Y.K. Batygin, I.N. Draganić, C.M. Fortgang, G. Rouleau LANL, Los Alamos, New Mexico, USA
	LANSCE Ion Source Test Stand is used for systematic study of H⁻ source performance and details of low energy beam transport. It includes cesiated, multicusp-field, surface production H⁻ ion source, focusing solenoids, slit-collector emittance stations, 4.5o bending magnet, and electrostatic deflector. Series of experiments were performed to measure space charge neutralization of low energy H⁻ beam. Measurements were done for 80 keV and 35 keV H⁻ beams at various pressure of residual gas. Results of measurements are compared with results of beam dynamics simulations to determine level of space charge neutralization. Applicability of theoretical models of beam neutralization is discussed.

WEYB101	Power Upgrade of J-PARC Linac	rfq, ion, linac, cavity	2047
	H. Oguri JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan
	A linac power upgrade program is now in progress after a successful recovery from the earthquake disaster. The power upgrade includes an ion source, an RFQ and a 400 MeV Annular-ring Coupled Structure (ACS) linac. We started a full-scale development of a cesium seeded RF-driven negative hydrogen ion source. The ion source extracted the beam of more than 60 mA with a duty factor of 2.5 %, which is satisfied with the requirement of the program. A new RFQ for 50 mA acceleration is under construction on the basis of a RFQ fabrication process, which was built as a backup for the present RFQ. Mass production of the ACS modules have almost completed. There is a plan to install these components and schedule the beam test in 2013. This presentation will cover the power upgrade status of the J-PARC linac.
	Slides WEYB101 [4.205 MB]

WEXB201	Intense Highly Charged Heavy Ion Beam Production	ion, electron, plasma, heavy-ion	2077
	T. Nakagawa RIKEN/RARF/CC, Saitama, Japan
	With increase of applications of heavy ions in the various fields, production of intense beam of highly charged heavy ions form the ion sources become more and more important. For example, ion sources are required to produce intense dc beams of the highly charged heavy ions for the accelerator facilities of radio isotope beam production and the intense short pulsed beams for injection into synchrotrons. Additionally, in these applications, the ion sources face several important matters to be improved for meeting the requirements, such as source lifetime, reliability, current stability, and beam emittance. For these purposes, several high performance ion sources, which include ECR ion sources, electron beam ion sources and laser ion sources, for production of the intense beam (dc and pulsed) of highly charged heavy ions have been constructed and achieved remarkable breakthrough in the past decade. In this contribution, state-of-the-art ion sources for production of intense highly charged heavy ion beams are reviewed. Future perspective is also discussed.
	Slides WEXB201 [4.395 MB]

WEOAB201	Intense Beam Ion Sources Development at IMP	ion, ECR, heavy-ion, proton	2082
	L.T. Sun, Y. Cao, Y.C. Feng, J.Y. Li, Z.W. Liu, W. Lu, Q. Wu, Y. Yang, W.H. Zhang, X.Z. Zhang, Z.M. Zhang, H.W. Zhao IMP, Lanzhou, People's Republic of China D. Xie LBNL, Berkeley, California, USA
	To satisfy the HIRFL (Heavy Ion Research Facility in Lanzhou) accelerators’ requirement and the needs of several other future accelerator facilities, many high beam intensity ion sources have been developed at IMP. The ion sources include intense high charge state ion beam ECR ion sources and high intensity proton beam ECR or microwave sources. This paper will review the high charge state ion sources developed at IMP, especially the recently built fully superconducting ECR ion source SECRAL, and the other classical ion sources and all permanent magnet ion sources will also be discussed. The latest performance of the recently built intense proton ion source which can operate continuously at more than 65emA beam (after LEBT) and 50kV source high voltage for more than 150 hours with very few HV spark intervals will be especially presented in this paper.
	Slides WEOAB201 [3.381 MB]

THPEA022	The Remote Control System for LAPECR1	controls, ion, power-supply, high-voltage	3192
	W.X. Zhou, F.Y. Lin, J.F. Luo, Y.Y. Wang, J. Yin, Y.J. Yu, D.T. Zhou IMP, Lanzhou, People's Republic of China
	In order to support the debug of LAPECR1(Lanzhou All Permanent Magnet ECR Ion Source No.1) which merely provides H⁺ beam for HIRFL(Heavy Ion Research Facility in Lanzhou), a control system was realized in November 2011. The control system is composed of some controllers, a control-software and Intranet which is established by a switch. All of the controllers can access to Intranet directly or through serial-switch. And the controllers of the HV power and motor were designed by us. A IPC(Industrial Personal Computer) could control all of the equipments through Intranet. For the software of the system, it is designed using C++. And it could show the important data in the form of spectrum for the purpose of analysis and debug. The control system can acquire data and send command from/to the corresponding equipment.

THPWA005	The HIT Accelerator as Part of a Medical Product: Impacts on the Maintenance Strategy	ion, controls, proton, linac	3639
	A. Peters, R. Cee, Th. Haberer, T. Winkelmann HIT, Heidelberg, Germany
	The HIT accelerator produces protons and carbon beams with a large variety of parameters: 255 different energies, four foci and ten intensity steps per ion are independently available at 5 iso-centres to be requested by the dose delivery system for tumor treatment. Thus the whole accelerator chain is part of a medical product, in case of HIT an in-house manufactured device. The overall risk and quality management has deep influences on the maintenance process. Not only the huge volume of necessary documentation reflects this impact but also the organizational process before, along and after the services at HIT. Especially, the comprehensive testing after the maintenance procedures follows sophisticated checklists (e.g. the ion source service). On the other hand, a high operational availability of the accelerator in a hospital is mandatory. To realize 8250 hours of accelerator uptime per year in case of HIT, a maintenance strategy is necessary, which interleaves the regular service of the building infrastructure, e.g. air conditioning, with the periodic maintenance of the accelerator components. In detail, this approach will be discussed along the magnets and the gantry structure.

THPWA042	Investigation of Space Charge Compensation at FETS	ion, space-charge, emittance, rfq	3723
	J.K. Pozimski, S.M.H. Alsari, P. Savage Imperial College of Science and Technology, Department of Physics, London, United Kingdom D.C. Faircloth, A.P. Letchford STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
	In order to contribute to the development of high power proton accelerators in the MW range, to prepare the way for an ISIS upgrade and to contribute to the UK design effort on neutrino factories, a front end test stand (FETS) is being constructed at the Rutherford Appleton Laboratory (RAL) in the UK. The aim of the FETS is to demonstrate the production of a 60 mA, 2 ms, 50 pps chopped beam at 3 MeV with sufficient beam quality. The ion source and LEBT are operational with the RFQ under manufacture. As a more detailed knowledge is of interest also for other projects like ESS and LINAC4 the FETS LEBT was updated to perform a detailed experimental analysis of space charge compensation utilizing a pulsed decompensation electrode together with a residual gas ion energy spectrometer and a fast emittance measurement device. In the FETS LEBT a high degree of space charge compensation (~90%) and a rise time of space charge compensation around ~ 50 μs could be concluded from measurements . In this paper the results of the experimental work will be presented together with discussion of the findings in respect to beam transport.

THPWO006	Beam Commissioning of the Linear IFMIF Prototype Accelerator Injector: Measurements and Simulations	solenoid, emittance, simulation, ion	3767
	N. Chauvin, S. Chel, O. Delferrière, R. Gobin, P.A.P. Nghiem, F. Senée, M. Valette CEA/IRFU, Gif-sur-Yvette, France A. Mosnier Fusion for Energy, Garching, Germany Y. Okumura JAEA, Rokkasho, Japan H. Shidara IFMIF/EVEDA, Rokkasho, Japan D. Uriot CEA/DSM/IRFU, France
	The EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating, in Japan, a 125 mA/9 MeV deuteron accelerator, called LIPAc, which has been developed in Europe. The 140 mA cw D⁺ beam that has to be delivered by the LIPAc injector is produced by a 2.45 GHz ECR ion source based on the SILHI design. The low energy beam transfer line (LEBT) relies on a dual solenoid focusing system to transport the beam and to match it into the RFQ. The beam line is equipped by several diagnostics: intensity measurement, emittance measurement unit, profilers and beam proportion analysis. During the LIPAc injector beam commissioning performed in CEA-Saclay, the deuteron beam intensity transported at the end of the LEBT reached an unprecedented value of 140 mA at 100 keV. In this paper, the results obtained during the commissioning are presented. In particular, beam emittance measurements as a function of duty cycle, extracted current from the ion source and solenoid tunings are exposed. The experimental results are discussed and compared to beam dynamics simulations. R. Gobin et al., this conference

THPWO043	Progress on the Physics Design of the C-ADS Injector Scheme I	rfq, linac, focusing, cavity	3863
	Z. Li, P. Cheng, H. Geng, C. Meng, H.F. Ouyang, B. Sun, J.Y. Tang, F. Yan, Z. Yang IHEP, Beijing, People's Republic of China
	Funding: Surported by China ADS Project The China ADS (C-ADS) driver linac is composed of two parallel 10 MeV injectors and a main linac which boosts the beam further to 1.5 MeV. There are two design schemes for the injectors based on different working frequency and superconducting cavity structures and are under developing at the same time on IHEP and IMP. The Injector Scheme I, which is proposed by IHEP, works at 325 MHz, the same frequency of the main linac, and superconducting Spoke cavities with geometry beta of 0.12, the same type of cavity as the main linac too, are applied after the RFQ. In this paper, the latest progress on physics design will be presented.

THPWO069	Development of the NICA Injection Facility	ion, rfq, linac, injection	3915
	A.V. Butenko, E.D. Donets, E.E. Donets, V.V. Fimushkin, A. Govorov, A.D. Kovalenko, K.A. Levterov, I.N. Meshkov, V. Monchinsky, A.Yu. Ramsdorf, A.O. Sidorin, G.V. Trubnikov JINR, Dubna, Moscow Region, Russia H. Hoeltermann, H. Podlech, U. Ratzinger, A. Schempp BEVATECH OHG, Offenbach/Main, Germany A. Kolomiets, G. Kropachev, T. Kulevoy ITEP, Moscow, Russia S.M. Polozov MEPhI, Moscow, Russia
	The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector for light ions, polarized protons and deuterons and a new linac HILac for heavy ions. The main features of ion sources and both linacs are presented. Upgrade for pre-accelerator of LU-20 is described.

THPWO086	Status of the RAL Front End Test Stand	rfq, ion, beam-transport, status	3963
	A.P. Letchford, M.A. Clarke-Gayther, D.C. Faircloth, S.R. Lawrie STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom S.M.H. Alsari, M. Aslaninejad, J.K. Pozimski, P. Savage Imperial College of Science and Technology, Department of Physics, London, United Kingdom J.J. Back University of Warwick, Coventry, United Kingdom G.E. Boorman, A. Bosco, S.M. Gibson Royal Holloway, University of London, Surrey, United Kingdom R.T.P. D'Arcy, S. Jolly UCL, London, United Kingdom C. Gabor, D.C. Plostinar STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom J.K. Pozimski STFC/RAL, Chilton, Didcot, Oxon, United Kingdom
	The Front End Test Stand (FETS) under construction at RAL is a demonstrator for the front end systems of a future high power proton linac. Possible applications include a linac upgrade for the ISIS spallation neutron source, new future neutron sources, accelerator driven sub-critical systems, a neutrino factory etc. Designed to deliver a 60mA H-minus beam at 3MeV with a 10% duty factor, FETS consists of a high brightness ion source, magnetic low energy beam transport (LEBT), 4-vane 324MHz radio frequency quadrupole, medium energy beam transport (MEBT) containing a high speed beam chopper and non-destructive photo-detachment diagnostics. This paper describes the current status of the project and future plans.

Paper

Title

Other Keywords

Page

MOPEA064

A New Long Pulse High Voltage Extraction Power Supply for FETS

extraction, power-supply, high-voltage, ion

228

D.C. Faircloth, S.R. Lawrie, M. Perkins
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

A new 25 kV 2 ms 50 Hz extraction voltage power supply has been developed for the high performance H-minus ion source for the Front End Test Stand at the Rutherford Appleton Laboratory. The power supply has been designed to fit in a single 19 inch rack and has a modular design for easy maintenance. This paper details the design and performance of the power supply and extracted beam currents.

MOPEA065

Commissioning of the Ion Source for Siemens Novel Electrostatic Accelerator

ion, plasma, extraction, electron

231

H. von Jagwitz-Biegnitz
JAI, Oxford, United Kingdom
P. Beasley, O. Heid
Siemens AG, Erlangen, Germany
D.C. Faircloth
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
A.J. Holmes
Marcham Scientific Ltd, Hungerford, United Kingdom
R.G. Selway
Inspired Engineering Ltd, Climping, United Kingdom
B. Singh, E. Zitvogel
BNL, Upton, New York, USA

Siemens is developing a novel compact DC electrostatic tandem accelerator and currently building a prototype. A dedicated H⁻ ion source for this accelerator has been designed and built. This paper reports on some of the design features as well as results of the commissioning phase of this filament driven DC multicusp volume H⁻ ion source. Stable H⁻ currents of more then 300 μA at 10 keV have been extracted. This satisfies the beam current requirement of the novel accelerator.

MOPFI027

The Progress of the BRISOL Facility at CIAE

ion, target, vacuum, diagnostics

339

B. Tang, L.H. Chen, B.Q. Cui, Q.H. Huang, W. Jiang, R. Ma, Y.J. Ma, Z. Peng
CIAE, Beijing, People's Republic of China

Beijing Radioactive Ion-beam Facilities Isotope Separator On-Line (BRISOL), aiming to generate short life radioactive ion beam (RIB) on-line, is being constructed at China Institute of Atomic Energy(CIAE). Up to now, construction of major equipment for BRISOL is completed, including ion source, vacuum system, separator, optical element, and beam diagnostic system, and assembling is underway in laboratory. The on-site installation of all the beam line will be carried out soon. All the major element prototype including surface ion source, quadrupole, hexapole, multipole and beam diagnostic system have been studied off-line on a test-bench for BRISOL. A Li beam was generated and separated . The primary tests show that the ion source and the optical elements work well. The test charge exchange cell (CEC) is under way. BRISOL will be commissioned next year.

MOPFI029

The Construction Progress of Beijing Radioactive Ion-beam Facility

ion, cyclotron, ISOL, vacuum

345

T.J. Zhang, Shizhong. An, B.Q. Cui, Z.G. Li, Y.L. Lu, C.H. Peng, F. Yang
CIAE, Beijing, People's Republic of China

The Beijing Radioactive Ion-Beam Facility (BRIF) is being constructed at CIAE. The project consists of a 100 MeV high intensity cyclotron CYCIAE-100, an ISOL system with a mass resolution of 20000, and a superconducting booster. The construction of the building was started on April 28, 2011 and the roof was sealed on Jan. 16, 2012. The on-site installation conditions have been ready since Sept. 27, 2012. Up to now, the fabrication of all major components for CYCIAE-100 have been completed, including the main magnet system, the RF system, ion source and injection, main vacuum, etc. The equipment fabrication for the ISOL system has been completed and magnetic mapping and shimming is being performed on the large-scale analysis magnet. The fabrication of the major components for the superconducting booster has been accomplished, and the work on copper-niobium sputtering is under way. At present, the installation and assembly is in full swing and the beam commissioning is to predicted to be finished in mid 2013. Taking advantage of the experiences accumulated on the CRM cyclotron with beam up to 430 uA, it is likely that the first beams of 100 MeV can be achieved by the end of 2013.

MOPFI033

Commissioning Results and Progress of a Helium Injector for Coupled RFQ and SFRFQ Project at Peking University

ion, rfq, emittance, cavity

357

J. Chen, J.E. Chen, S.L. Gao, Z.Y. Guo, Y.T. Luo, S.X. Peng, H.T. Ren, Z. Wang, Z.H. Wang, W.L. Xia, Y. Xu, A.L. Zhang, T. Zhang, J. Zhao
PKU, Beijing, People's Republic of China

At Peking University (PKU) a new helium injector for coupled radio frequency quadrupole(RFQ) and separated function radio frequency quadrupole(SFRFQ) within one cavity, so called as coupled RFQ & SFRFQ, was designed recently*. It will provide a 30keV 20mA He⁺ beam whose emittance is less than 0.15 π.mm.mrad for the accelerator. It is a combination of a 2.45GHz PKU PMECRIS (Permanent Magnet ECRIS) and a 1.16 m long LEBT. Within the 1.16 m LEBT, 2 solenoids, 2 steering magnets, a kicker, a space charge compensation section, a collimator, two vacuum valves, a Faraday cup and an ACCT are installed. The manufacture has been completed and the commissioning is on the way. In this paper we will address the commissioning results and its progress.
* Haitao Ren, et al., A Helium Injector for Coupled RFQ and SFRFQ Cavity Project at Peking University. Proc. LINAC’12, Paper TUPB034, Israel, 2012

MOPFI034

First Intense H⁻ Beam Generated by a Microwave-driven Pure Volume Source

ion, electron, plasma, extraction

360

S.X. Peng, J. Chen, J.E. Chen, Z.Y. Guo, H.T. Ren, Zh.W. Wang, Y. Xu, T. Zhang
PKU, Beijing, People's Republic of China
A.L. Zhang
Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China
J. Zhao
State Key Laboratory of Nuclear Physics and Technology, Beijing, Haidian District, People's Republic of China

The 2.45 GHz Electron cyclotron resonance (ECR) plasma generators have demonstrated their efficiency, reproducibility on producing H⁺, D⁺, O+, N+, He+, Ar+* and He2+ at Peking University(PKU). Recently, modifications on magnet field configuration, discharge chamber structure and extraction system have been done to set-up a microwave-driven pure volume H⁻ ion source. First experiment was done on PKU ion source test bench at the beginning of Nov, 2012. A 15 mA H⁻ ion beam has been produced at 40 keV by this prototype source. This paper describes the source principle and design in detail and reports on the current status of the development work.
* H. T. Ren, S. X. Peng*, P. N. Lu, S. Yan, Q. F. Zhou, J. Zhao, Z. X. Yuan, Z. Y. Guo and J. E. Chen, Rev. Sci. Instrum. 83, 02B905 (2012)

MOPFI035

Preliminary Results of H²⁺ Beam Generated by a 2.45 GHz Permanent Magnet ECR Ion Source at PKU

ion, plasma, permanent-magnet, cyclotron

363

Y. Xu, J. Chen, J.E. Chen, Z.Y. Guo, Y.T. Luo, S.X. Peng, H.T. Ren, Z.H. Wang, T. Zhang, J. Zhao
PKU, Beijing, People's Republic of China
A.L. Zhang
Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China

Recently, the need to build an ion source generating high current hydrogen molecular ion H²⁺ beam has been growing rapidly. For example, H²⁺ ion can be used as a pilot beam of the intense deuteron beam during the commission phase of linear accelerators to minimize the activation of components. And it is an effective way to improve the output current of cyclotrons by accelerating H²⁺ and stripping it into H⁺ at the exit of accelerator, instead of accelerating H⁺ beam directly. To obtain high-yield H²⁺ ion beam, experimental and theoretical study was carried out on the 2.45 GHz Peking University permanent magnet electron cyclotron resonance ion source (PKU PMECR). With PMECR II*, studies on the size of discharge chamber and the operation pressure were carried out to increase H²⁺ ion fraction. Beam analysis results prove that the H²⁺ can reach 40.5% with suitable operation parameters. More details will be presented in this paper.
* Zhizhong Song, Shixiang Peng et al., Rev. Sci. Instrum. 77, 03A305 (2006)
** Author to whom correspondence should be addressed. Electronic mail:
sxpeng@pku.edu.cn.

MOPFI047

Analysis and Design of Matching Unit for a RF Driven Plasma Source for Fusion Purpose

plasma, impedance, ion, neutral-beams

389

H.K. Yue
Huazhong University of Science and Technology(HUST), Wuhan, People's Republic of China
D.Z. Chen, M. Fan, J. Huang, D. Li, X.F. Li, K.F. Liu, C.R. Wan, C. Zhou
HUST, Wuhan, People's Republic of China

A RF driven plasma exciter for producing negative ions, aiming for heating and current drive neutral beam injectors for fusion applications, is in developing in Huazhong University of Science and Technology (HUST). In order to couple the maximum RF power to the source, the matching unit is designed to match the impedance of the source to that of the RF coaxial line. Firstly, a FEM model was built to estimate the equivalent circuit parameters of the source. Numerical predictions were compared with a small experimental setup to verify the accuracy of the fem model. Based on the numerical results, the RF coil and the matching components were carefully designed. Finally, the matching circuit for the source is developed and tested. Experimental results will be presented in the full paper.

MOPFI071

High Power Cyclotrons for the Neutrino Experiments DAEδALUS and IsoDAR

cyclotron, ion, proton, electron

446

R.J. Barlow, A. Bungau, A.M. Kolano
University of Huddersfield, Huddersfield, United Kingdom
A. Adelmann
PSI, Villigen PSI, Switzerland
J.R. Alonso
LBNL, Berkeley, California, USA
W.A. Barletta, A. Calanna, D. Campo, J.M. Conrad
MIT, Cambridge, Massachusetts, USA
L. Calabretta
INFN/LNS, Catania, Italy
F. Méot
BNL, Upton, Long Island, New York, USA
H.L. Owen
UMAN, Manchester, United Kingdom
M. Shaevitz
Columbia University, New York, USA

DAEδALUS (Decay At rest Experiment for δ_cp At a Laboratory for Underground Science) has been proposed to measure the value of the CP violating phase delta through the oscillation of low energy muon anti-neutrinos to electron antineutrinos. With a single large detector, three accelerators at different distances enable the oscillation to be measured with sufficient accuracy. We have proposed the superconducting multi-megawatt DAEδALUS Supercinducting Ring Cyclotron (DSRC) as the means of producing the 800 MeV 12 mA protons required, through the acceleration of H₂⁺, ions with highly efficient stripping extraction. The DSRC comprises twin ion sources and injector cyclotrons, followed by a booster. The injector cyclotron can also be used for a separate experiment, IsoDAR (Isotope Decay At Rest) in which low energy protons produce Lithium 8, and thus a very pure electron antineutrino source which can be used to measure, or rule out, short range oscillation to a sterile neutrino. We describe recent developments in the designs of the injector and the booster, and the prospects for the two experiments.

MOPWA062

Transverse Beam Halo Measurements at High Intensity Neutrino Source (HINS) using Vibrating Wire Monitor

ion, target, proton, linac

819

M. Chung, B.M. Hanna, V.E. Scarpine, V.D. Shiltsev, J. Steimel
Fermilab, Batavia, USA
S. Artinian
BERGOZ Instrumentation, Saint Genis Pouilly, France
S.G. Arutunian
ANSL, Yerevan, Armenia

Funding: Research supported by the U.S. Department of Energy.
Measurement and control of transverse beam halo will be critical for the applications of future high-intensity hadron linacs. In particular, beam profile monitors require a very high dynamic range when using for transverse beam halo measurements. In this study, the Vibrating Wire Monitor (VWM) with aperture 60 mm was installed at the High Intensity Neutrino Source (HINS) front-end to measure transverse beam halo. A vibrating wire is excited at its resonance frequency with the help of a magnetic feedback loop, and the vibrating and sensitive wires are connected through a balanced arm. The sensitive wire is moved into the beam halo region by a stepper motor controlled translational stage. We study the feasibility of the vibrating wire for transverse beam halo measurements in the low-energy front-end of the proton linac.

MOPWO014

Numerical Methods to the Space Charge Compensation (SCC) Effect of the LEBT Beam

electron, ion, space-charge, simulation

915

S.X. Peng, J. Chen, J.E. Chen, Z.Y. Guo, P.N. Lu, Y.T. Luo, H.T. Ren, Z.H. Wang, Y. Xu, T. Zhang, J. Zhao
PKU, Beijing, People's Republic of China
A.L. Zhang
Graduate University, Chinese Academy of Sciences, Beijing, People's Republic of China

Numerical simulation as well as experimental researches on space charge compensation for high intensity, low energy ion beam has been done at Peking University (PKU). In this paper we will describe the simulation model proposed at PKU and use it on the PKU ECR single-charged ion source. It consists of a new concept of equivalent density and more consideration of physical process. A series of arithmetical equations is gained through theoretical derivation. Although no numerical solutions have been carried out from our computation, it is foreseeable that the final result will be achieved soon.

TUPWA066

Space Charge Neutralization of Low Energy H⁻ Beam

emittance, space-charge, simulation, ion

1856

Y.K. Batygin, I.N. Draganić, C.M. Fortgang, G. Rouleau
LANL, Los Alamos, New Mexico, USA

LANSCE Ion Source Test Stand is used for systematic study of H⁻ source performance and details of low energy beam transport. It includes cesiated, multicusp-field, surface production H⁻ ion source, focusing solenoids, slit-collector emittance stations, 4.5o bending magnet, and electrostatic deflector. Series of experiments were performed to measure space charge neutralization of low energy H⁻ beam. Measurements were done for 80 keV and 35 keV H⁻ beams at various pressure of residual gas. Results of measurements are compared with results of beam dynamics simulations to determine level of space charge neutralization. Applicability of theoretical models of beam neutralization is discussed.

WEYB101

Power Upgrade of J-PARC Linac

rfq, ion, linac, cavity

2047

H. Oguri
JAEA/J-PARC, Tokai-Mura, Naka-Gun, Ibaraki-Ken, Japan

A linac power upgrade program is now in progress after a successful recovery from the earthquake disaster. The power upgrade includes an ion source, an RFQ and a 400 MeV Annular-ring Coupled Structure (ACS) linac. We started a full-scale development of a cesium seeded RF-driven negative hydrogen ion source. The ion source extracted the beam of more than 60 mA with a duty factor of 2.5 %, which is satisfied with the requirement of the program. A new RFQ for 50 mA acceleration is under construction on the basis of a RFQ fabrication process, which was built as a backup for the present RFQ. Mass production of the ACS modules have almost completed. There is a plan to install these components and schedule the beam test in 2013. This presentation will cover the power upgrade status of the J-PARC linac.

Slides WEYB101 [4.205 MB]

WEXB201

Intense Highly Charged Heavy Ion Beam Production

ion, electron, plasma, heavy-ion

2077

T. Nakagawa
RIKEN/RARF/CC, Saitama, Japan

With increase of applications of heavy ions in the various fields, production of intense beam of highly charged heavy ions form the ion sources become more and more important. For example, ion sources are required to produce intense dc beams of the highly charged heavy ions for the accelerator facilities of radio isotope beam production and the intense short pulsed beams for injection into synchrotrons. Additionally, in these applications, the ion sources face several important matters to be improved for meeting the requirements, such as source lifetime, reliability, current stability, and beam emittance. For these purposes, several high performance ion sources, which include ECR ion sources, electron beam ion sources and laser ion sources, for production of the intense beam (dc and pulsed) of highly charged heavy ions have been constructed and achieved remarkable breakthrough in the past decade. In this contribution, state-of-the-art ion sources for production of intense highly charged heavy ion beams are reviewed. Future perspective is also discussed.

Slides WEXB201 [4.395 MB]

WEOAB201

Intense Beam Ion Sources Development at IMP

ion, ECR, heavy-ion, proton

2082

L.T. Sun, Y. Cao, Y.C. Feng, J.Y. Li, Z.W. Liu, W. Lu, Q. Wu, Y. Yang, W.H. Zhang, X.Z. Zhang, Z.M. Zhang, H.W. Zhao
IMP, Lanzhou, People's Republic of China
D. Xie
LBNL, Berkeley, California, USA

To satisfy the HIRFL (Heavy Ion Research Facility in Lanzhou) accelerators’ requirement and the needs of several other future accelerator facilities, many high beam intensity ion sources have been developed at IMP. The ion sources include intense high charge state ion beam ECR ion sources and high intensity proton beam ECR or microwave sources. This paper will review the high charge state ion sources developed at IMP, especially the recently built fully superconducting ECR ion source SECRAL, and the other classical ion sources and all permanent magnet ion sources will also be discussed. The latest performance of the recently built intense proton ion source which can operate continuously at more than 65emA beam (after LEBT) and 50kV source high voltage for more than 150 hours with very few HV spark intervals will be especially presented in this paper.

Slides WEOAB201 [3.381 MB]

THPEA022

The Remote Control System for LAPECR1

controls, ion, power-supply, high-voltage

3192

W.X. Zhou, F.Y. Lin, J.F. Luo, Y.Y. Wang, J. Yin, Y.J. Yu, D.T. Zhou
IMP, Lanzhou, People's Republic of China

In order to support the debug of LAPECR1(Lanzhou All Permanent Magnet ECR Ion Source No.1) which merely provides H⁺ beam for HIRFL(Heavy Ion Research Facility in Lanzhou), a control system was realized in November 2011. The control system is composed of some controllers, a control-software and Intranet which is established by a switch. All of the controllers can access to Intranet directly or through serial-switch. And the controllers of the HV power and motor were designed by us. A IPC(Industrial Personal Computer) could control all of the equipments through Intranet. For the software of the system, it is designed using C++. And it could show the important data in the form of spectrum for the purpose of analysis and debug. The control system can acquire data and send command from/to the corresponding equipment.

THPWA005

The HIT Accelerator as Part of a Medical Product: Impacts on the Maintenance Strategy

ion, controls, proton, linac

3639

A. Peters, R. Cee, Th. Haberer, T. Winkelmann
HIT, Heidelberg, Germany

The HIT accelerator produces protons and carbon beams with a large variety of parameters: 255 different energies, four foci and ten intensity steps per ion are independently available at 5 iso-centres to be requested by the dose delivery system for tumor treatment. Thus the whole accelerator chain is part of a medical product, in case of HIT an in-house manufactured device. The overall risk and quality management has deep influences on the maintenance process. Not only the huge volume of necessary documentation reflects this impact but also the organizational process before, along and after the services at HIT. Especially, the comprehensive testing after the maintenance procedures follows sophisticated checklists (e.g. the ion source service). On the other hand, a high operational availability of the accelerator in a hospital is mandatory. To realize 8250 hours of accelerator uptime per year in case of HIT, a maintenance strategy is necessary, which interleaves the regular service of the building infrastructure, e.g. air conditioning, with the periodic maintenance of the accelerator components. In detail, this approach will be discussed along the magnets and the gantry structure.

THPWA042

Investigation of Space Charge Compensation at FETS

ion, space-charge, emittance, rfq

3723

J.K. Pozimski, S.M.H. Alsari, P. Savage
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
D.C. Faircloth, A.P. Letchford
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom

In order to contribute to the development of high power proton accelerators in the MW range, to prepare the way for an ISIS upgrade and to contribute to the UK design effort on neutrino factories, a front end test stand (FETS) is being constructed at the Rutherford Appleton Laboratory (RAL) in the UK. The aim of the FETS is to demonstrate the production of a 60 mA, 2 ms, 50 pps chopped beam at 3 MeV with sufficient beam quality. The ion source and LEBT are operational with the RFQ under manufacture. As a more detailed knowledge is of interest also for other projects like ESS and LINAC4 the FETS LEBT was updated to perform a detailed experimental analysis of space charge compensation utilizing a pulsed decompensation electrode together with a residual gas ion energy spectrometer and a fast emittance measurement device. In the FETS LEBT a high degree of space charge compensation (~90%) and a rise time of space charge compensation around ~ 50 μs could be concluded from measurements . In this paper the results of the experimental work will be presented together with discussion of the findings in respect to beam transport.

THPWO006

Beam Commissioning of the Linear IFMIF Prototype Accelerator Injector: Measurements and Simulations

solenoid, emittance, simulation, ion

3767

N. Chauvin, S. Chel, O. Delferrière, R. Gobin, P.A.P. Nghiem, F. Senée, M. Valette
CEA/IRFU, Gif-sur-Yvette, France
A. Mosnier
Fusion for Energy, Garching, Germany
Y. Okumura
JAEA, Rokkasho, Japan
H. Shidara
IFMIF/EVEDA, Rokkasho, Japan
D. Uriot
CEA/DSM/IRFU, France

The EVEDA (Engineering Validation and Engineering Design Activities) phase of the IFMIF (International Fusion Materials Irradiation Facility) project consists in building, testing and operating, in Japan, a 125 mA/9 MeV deuteron accelerator, called LIPAc, which has been developed in Europe. The 140 mA cw D⁺ beam that has to be delivered by the LIPAc injector is produced by a 2.45 GHz ECR ion source based on the SILHI design. The low energy beam transfer line (LEBT) relies on a dual solenoid focusing system to transport the beam and to match it into the RFQ*. The beam line is equipped by several diagnostics: intensity measurement, emittance measurement unit, profilers and beam proportion analysis. During the LIPAc injector beam commissioning performed in CEA-Saclay, the deuteron beam intensity transported at the end of the LEBT reached an unprecedented value of 140 mA at 100 keV. In this paper, the results obtained during the commissioning are presented. In particular, beam emittance measurements as a function of duty cycle, extracted current from the ion source and solenoid tunings are exposed. The experimental results are discussed and compared to beam dynamics simulations.
* R. Gobin et al., this conference

THPWO043

Progress on the Physics Design of the C-ADS Injector Scheme I

rfq, linac, focusing, cavity

3863

Z. Li, P. Cheng, H. Geng, C. Meng, H.F. Ouyang, B. Sun, J.Y. Tang, F. Yan, Z. Yang
IHEP, Beijing, People's Republic of China

Funding: Surported by China ADS Project
The China ADS (C-ADS) driver linac is composed of two parallel 10 MeV injectors and a main linac which boosts the beam further to 1.5 MeV. There are two design schemes for the injectors based on different working frequency and superconducting cavity structures and are under developing at the same time on IHEP and IMP. The Injector Scheme I, which is proposed by IHEP, works at 325 MHz, the same frequency of the main linac, and superconducting Spoke cavities with geometry beta of 0.12, the same type of cavity as the main linac too, are applied after the RFQ. In this paper, the latest progress on physics design will be presented.

THPWO069

Development of the NICA Injection Facility

ion, rfq, linac, injection

3915

A.V. Butenko, E.D. Donets, E.E. Donets, V.V. Fimushkin, A. Govorov, A.D. Kovalenko, K.A. Levterov, I.N. Meshkov, V. Monchinsky, A.Yu. Ramsdorf, A.O. Sidorin, G.V. Trubnikov
JINR, Dubna, Moscow Region, Russia
H. Hoeltermann, H. Podlech, U. Ratzinger, A. Schempp
BEVATECH OHG, Offenbach/Main, Germany
A. Kolomiets, G. Kropachev, T. Kulevoy
ITEP, Moscow, Russia
S.M. Polozov
MEPhI, Moscow, Russia

The new accelerator complex Nuclotron-based Ion Collider fAcility (NICA) is assumed to operate using two injectors: the Alvarez-type linac LU-20 as injector for light ions, polarized protons and deuterons and a new linac HILac for heavy ions. The main features of ion sources and both linacs are presented. Upgrade for pre-accelerator of LU-20 is described.

THPWO086

Status of the RAL Front End Test Stand

rfq, ion, beam-transport, status

3963

A.P. Letchford, M.A. Clarke-Gayther, D.C. Faircloth, S.R. Lawrie
STFC/RAL/ISIS, Chilton, Didcot, Oxon, United Kingdom
S.M.H. Alsari, M. Aslaninejad, J.K. Pozimski, P. Savage
Imperial College of Science and Technology, Department of Physics, London, United Kingdom
J.J. Back
University of Warwick, Coventry, United Kingdom
G.E. Boorman, A. Bosco, S.M. Gibson
Royal Holloway, University of London, Surrey, United Kingdom
R.T.P. D'Arcy, S. Jolly
UCL, London, United Kingdom
C. Gabor, D.C. Plostinar
STFC/RAL/ASTeC, Chilton, Didcot, Oxon, United Kingdom
J.K. Pozimski
STFC/RAL, Chilton, Didcot, Oxon, United Kingdom

The Front End Test Stand (FETS) under construction at RAL is a demonstrator for the front end systems of a future high power proton linac. Possible applications include a linac upgrade for the ISIS spallation neutron source, new future neutron sources, accelerator driven sub-critical systems, a neutrino factory etc. Designed to deliver a 60mA H-minus beam at 3MeV with a 10% duty factor, FETS consists of a high brightness ion source, magnetic low energy beam transport (LEBT), 4-vane 324MHz radio frequency quadrupole, medium energy beam transport (MEBT) containing a high speed beam chopper and non-destructive photo-detachment diagnostics. This paper describes the current status of the project and future plans.