Development of a versatile multiaperture negative ion source
M. Cavenago, T. Kulevoy, S. Petrenko, G. Serianni, V. Antoni et al.
A 60 kV ion source (9 beamlets of 15 mA each of H) and plasma generators are being developed at Consorzio RFX and INFN-LNL, for their versatility in experimental campaigns and for training. Unlike most experimental sources, the design aimed at continuous operation. Magnetic configuration can achieve ... [Rev. Sci. Instrum. 83, 02A707 (2012)] published Mon Feb 13, 2012.
Numerical simulation of gridded electrostatic lens
G. N. Kropachev, N. N. Alexeev, A. I. Balabin, T. V. Kulevoy, and V. I Nikolaev
Gridded electrostatic lenses are frequently used in extraction systems and low energy ion beam transport line. Typically, for numerical simulation the grid is treated as a metal plate transparent for beam particles. The influence of real grid geometry on the beam dynamics in the gridded lens has bee ... [Rev. Sci. Instrum. 83, 02B907 (2012)] published Mon Feb 13, 2012.
Study on the beam transport from the Bio-Nano ECRIS
T. Uchida, H. Minezaki, K. Oshima, R. Racz, M. Muramatsu et al.
The beam transport of N ion and C ion in the Bio-Nano ECRIS with min-B configuration was investigated based on the ion beam profiles. The N beam could be focused under the low-beam current conditions. Also the C beam could be focused in spite of the large space-charge effect which will lead the dive ... [Rev. Sci. Instrum. 83, 02B713 (2012)] published Mon Feb 13, 2012.
Use of a wire scanner for monitoring residual gas ionization in Soreq Applied Research Accelerator Facility 20 keV/u proton/deuteron low energy beam transport beam line
B. Vainas, I. Eliyahu, L. Weissman, and D. Berkovits
The ion source end of the Soreq Applied Research Accelerator Facility accelerator consists of a proton/deuteron ECR ion source and a low energy beam transport (LEBT) beam line. An observed reduction of the radio frequency quadrupole transmission with increase of the LEBT current prompted additional ... [Rev. Sci. Instrum. 83, 02B712 (2012)] published Mon Feb 13, 2012.
Deuteron injector for Peking University Neutron Imaging Facility project
H. T. Ren, S. X. Peng, P. N. Lu, Q. F. Zhou, Z. X. Yuan et al.
The deuteron injector developed for the PKUNIFTY (Peking University Neutron Imaging Facility) has been installed and commissioned at Peking University (PKU). The injector system must transfer 50 keV 50 mA of D ion beam to the entrance of the 2 MeV radio frequency quadrupole (RFQ) with 10% duty facto ... [Rev. Sci. Instrum. 83, 02B711 (2012)] published Mon Feb 13, 2012.
A new extraction system for the Linac4 Hion source
O. Midttun, T. Kalvas, M. Kronberger, J. Lettry, H. Pereira et al.
As part of the CERN accelerator complex upgrade, a new linear accelerator for H (Linac4) is under construction. The ion source design is based on the non-caesiated DESY RF-driven ion source, with the goal of producing an H beam of 80 mA beam current, 45 keV beam energy, 0.4 ms pulse length, and 2 Hz ... [Rev. Sci. Instrum. 83, 02B710 (2012)] published Mon Feb 13, 2012.
Correlation between the plasma parameters and the extracted current density in the volume-production based sources of negative hydrogen ions
St. Lishev, A. Shivarova, and Kh. Tarnev
Unified description of a volume-production based source of negative hydrogen ions, including its three regionsthe driver, the plasma expansion through the magnetic filter, and the extraction of the ions at the position of the first electrode of the extraction systemis presented within a two-dimensio ... [Rev. Sci. Instrum. 83, 02A709 (2012)] published Mon Feb 13, 2012.
Smith-chart diagnostics for multi-GHz time-domain-reflectometry dielectric spectroscopy
N. E. Hager, III, R. C. Domszy, and M. R. Tofighi
A time-domain-reflectometry Smith-chart display is demonstrated to be a valuable diagnostic tool in a variety of situations in time-domain-reflectometry dielectric spectroscopy. A relative reflection coefficient is formed by dividing the Laplace transform of the reflected sample transient by the Lap ... [Rev. Sci. Instrum. 83, 025108 (2012)] published Mon Feb 13, 2012.
Quartz crystal microbalance based on passive frequency to voltage converter
Ioan Burda and Arthur Tunyagi
In dynamics of evaporation or drying of microdrops from a solid surface, a faster and precise quartz crystal microbalance (QCM) is needed. The fast QCM based on frequency to voltage converter is an attractive and powerful tool in the investigation of the dynamic regime of evaporation to translate th ... [Rev. Sci. Instrum. 83, 025107 (2012)] published Mon Feb 13, 2012.
Transducer for mechanical impedance testing over a wide frequency range through active feedback
Michael Wiertlewski and Vincent Hayward
We describe a feedback-controlled active mechanical probe which can achieve a very low mechanical impedance, uniformly over a wide frequency range. The feedback produces a state of quasi-resonance which transforms the probe into a source of force used to excite an unknown load, resulting in a precis ... [Rev. Sci. Instrum. 83, 025001 (2012)] published Mon Feb 13, 2012.
The electron spectro-microscopy beamline at National Synchrotron Light Source II: A wide photon energy range, micro-focusing beamline for photoelectron spectro-microscopies
R. Reininger, S. L. Hulbert, P. D. Johnson, J. T. Sadowski, D. E. Starr et al.
A comprehensive optical design for a high-resolution, high-flux, wide-energy range, micro-focused beamline working in the vacuum ultraviolet and soft x-ray photon energy range is proposed. The beamline is to provide monochromatic radiation to three photoelectron microscopes: a full-field x-ray photo ... [Rev. Sci. Instrum. 83, 023102 (2012)] published Mon Feb 13, 2012.
Code-division multiplexing for x-ray microcalorimeters
G. M. Stiehl, W. B. Doriese, J. W. Fowler, G. C. Hilton, K. D. Irwin et al.
We demonstrate the code-division multiplexing (CDM) readout of eight transition-edge sensor microcalorimeters. The energy resolution is 3.0 eV (full width at half-maximum) or better at 5.9 keV, with a best resolution of 2.3 eV and a mean of 2.6 eV over the seven modulated detectors. The flux-summing ... [Appl. Phys. Lett. 100, 072601 (2012)] published Mon Feb 13, 2012.
Nanofluid based optical sensor for rapid visual inspection of defects in ferromagnetic materials
V. Mahendran and John Philip
We have developed a simple sensor for imaging internal defects in materials using a magnetically polarizable nanoemulsion. The gradient in the magnetic flux lines around the defective region leads to the formation of one-dimensional nanodroplet arrays along the field direction, which incredibly diff ... [Appl. Phys. Lett. 100, 073104 (2012)] published Mon Feb 13, 2012.
Dynamics of electrostatic microelectromechanical systems actuators
Yisong Yang, Ruifeng Zhang, and Le Zhao
Electrostatic actuators are simple but important switching devices for microelectromechanical systems applications. Due to the difficulties associated with the electrostatic nonlinearity, precise mathematical description is often hard to obtain for the dynamics of these actuators. Here we present tw ... [J. Math. Phys. 53, 022703 (2012)] published Mon Feb 13, 2012.
A new fabrication technique to form complex polymethylmethacrylate microchannel for bioseparation
Talukder Z. Jubery, Mohammad R. Hossan, Danny R. Bottenus, Cornelius F. Ivory, Wenji Dong et al.
Recent studies show that reduction in cross-sectional area can be used to improve the concentration factor in microscale bioseparations. Due to simplicity in fabrication process, a step reduction in cross-sectional area is generally implemented in microchip to increase the concentration factor. But ... [Biomicrofluidics 6, 016503 (2012)] published Fri Feb 10, 2012.
Constant tip-surface distance with atomic force microscopy via quality factor feedback
Lin Fan, Daniel Potter, and Todd Sulchek
The atomic force microscope (AFM) is a powerful and widely used instrument to image topography and measure forces at the micrometer and nanometer length scale. Because of the high degree of operating accuracy required of the instrument, small thermal and mechanical drifts of the cantilever and piezo ... [Rev. Sci. Instrum. 83, 023706 (2012)] published Fri Feb 10, 2012.
Nanostructure operations by means of the liquid metal ion sources
I. S. Gasanov and I. I. Gurbanov
Characteristics of a disperse phase of liquid metal ion source on the basis of various working substances are investigated. It is revealed that generation of the charged particles occurs in the threshold image and is simultaneously accompanied by excitation of capillary instability on a surface of t ... [Rev. Sci. Instrum. 83, 02B906 (2012)] published Fri Feb 10, 2012.
Development of low-energy and high-current-density ion beam system
H. Sakakita, S. Kiyama, Y. Hirano, H. Koguchi, T. Shimada et al.
A low-energy ion beam system operating at a dc voltage of less than 300 V was developed using an ion source with a multicusp magnetic field. A high-current-density ion beam of 6.9 mA/cm was successfully extracted at the electrode. The beam extraction characteristics for flat and concave electrodes w ... [Rev. Sci. Instrum. 83, 02B708 (2012)] published Fri Feb 10, 2012.
Use of the focusing multi-slit ion optical system at RUssian Diagnostic Injector (RUDI)
A. Listopad, J. Coenen, V. Davydenko, A. Ivanov, V. Mishagin et al.
The upgrade of the diagnostic neutral beam injector RUDI in 2010 was performed to increase the beam density at the focal plane in accordance with the requirements of charge-exchange recombination spectroscopy diagnostics. A new focusing ion-optical system (IOS) with slit beamlets and an enlarged ape ... [Rev. Sci. Instrum. 83, 02B707 (2012)] published Fri Feb 10, 2012.
New methods for high current fast ion beam production by laser-driven acceleration
D. Margarone, J. Krasa, J. Prokupek, A. Velyhan, L. Torrisi et al.
An overview of the last experimental campaigns on laser-driven ion acceleration performed at the PALS facility in Prague is given. Both the 2 TW, sub-nanosecond iodine laser system and the 20 TW, femtosecond Ti:sapphire laser, recently installed at PALS, are used along our experiments performed in t ... [Rev. Sci. Instrum. 83, 02B307 (2012)] published Fri Feb 10, 2012.
A 2.45 GHz electron cyclotron resonance proton ion source and a dual-lens low energy beam transport
W. H. Zhang, H. Y. Ma, Y. Yang, Q. Wu, X. Z. Zhang et al.
The structure and preliminary commissioning results of a new 2.45 GHz ECR proton ion source and a dual-lens low energy beam transport (LEBT) system are presented in this paper. The main magnetic field of the ion source is provided by a set of permanent magnets with two small electro-solenoid magnets ... [Rev. Sci. Instrum. 83, 02A329 (2012)] published Fri Feb 10, 2012.
Development of DRAGON electron cyclotron resonance ion source at Institute of Modern Physics
W. Lu, D. Z. Xie, X. Z. Zhang, B. Xiong, L. Ruan et al.
A new room temperature electron cyclotron resonance (ECR) ion source, DRAGON, is under construction at IMP. DRAGON is designed to operate at microwaves of frequencies of 14.518 GHz. Its axial solenoid coils are cooled with evaporative medium to provide an axial magnetic mirror field of 2.5 T at the ... [Rev. Sci. Instrum. 83, 02A328 (2012)] published Fri Feb 10, 2012.
Improvement of efficiency and temperature control of induction heating vapor source on electron cyclotron resonance ion source
T. Takenaka, R. Kiriyama, M. Muramatsu, A. Kitagawa, T. Uchida et al.
An electron cyclotron resonance ion source (ECRIS) is used to generate multicharged ions for many kinds of the fields. We have developed an evaporator by using induction heating method that can generate pure vapor from solid state materials in ECRIS. We develop the new matching and protecting circui ... [Rev. Sci. Instrum. 83, 02A327 (2012)] published Fri Feb 10, 2012.
Wafer-scale fabrication of high-aspect ratio nanochannels based on edge-lithography technique
Quan Xie, Qing Zhou, Fei Xie, Jianming Sang, Wei Wang et al.
This paper introduced a wafer-scale fabrication approach for the preparation of nanochannels with high-aspect ratio (the ratio of the channel depth to its width). Edge lithography was used to pattern nanogaps in an aluminum film, which was functioned as deep reactive ion etching mask thereafter to f ... [Biomicrofluidics 6, 016502 (2012)] published Thu Feb 9, 2012.
Semiconductor core-shell quantum dot: A low temperature nano-sensor material
Saikat Chattopadhyay, Pratima Sen, Joseph Thomas Andrews, and Pranay Kumar Sen
This paper presents an analytical study of temperature dependent photoluminescence (PL) in core-shell quantum dots (CSQDs) made of most frequently used II-VI semiconducting materials. The analysis incorporates the temperature dependent radiative recombination processes in the calculation of the inte ... [J. Appl. Phys. 111, 034310 (2012)] published Thu Feb 9, 2012.
Intense beams from gases generated by a permanent magnet ECR ion source at PKU
H. T. Ren (任海涛), S. X. Peng (彭士香), P. N. Lu (吕鹏南), S. Yan (颜莎), Q. F. Zhou (周泉丰) et al.
An electron cyclotron resonance (ECR) ion source is designed for the production of high-current ion beams of various gaseous elements. At the Peking University (PKU), the primary study is focused on developing suitable permanent magnet ECR ion sources (PMECRs) for separated function radio frequency ... [Rev. Sci. Instrum. 83, 02B905 (2012)] published Thu Feb 9, 2012.
Progress towards the development of a realistic electron cyclotron resonance ion source extraction model
D. Winklehner, D. Leitner, J. Y. Benitez, C. M. Lyneis, and M. M. Strohmeier
In this paper, an ongoing effort to provide a simulation and design tool for electron cyclotron resonance ion source extraction and low energy beam transport is described and benchmarked against experimental results. Utilizing the particle-in-cell code WARP, a set of scripts has been developed: A se ... [Rev. Sci. Instrum. 83, 02B706 (2012)] published Thu Feb 9, 2012.
Ion optics of RHIC electron beam ion source
A. Pikin, J. Alessi, E. Beebe, A. Kponou, M. Okamura et al.
RHIC electron beam ion source has been commissioned to operate as a versatile ion source on RHIC injection facility supplying ion species from He to Au for Booster. Except for light gaseous elements RHIC EBIS employs ion injection from several external primary ion sources. With electrostatic optics ... [Rev. Sci. Instrum. 83, 02A504 (2012)] published Thu Feb 9, 2012.
First commissioning results with the Grenoble test electron cyclotron resonance ion source at iThemba LABS
R. Thomae, J. Conradie, H. Delsink, H. Du Plessis, D. Fourie et al.
iThemba Laboratory for Accelerator Based Science (iThemba LABS) is a multi-disciplinary accelerator facility. One of its main activities is the operation of a separated-sector cyclotron with a K-value of 200, which provides beams of various ion species. These beams are used for fundamental nuclear p ... [Rev. Sci. Instrum. 83, 02A323 (2012)] published Thu Feb 9, 2012.
Design of a compact electron cyclotron resonance ion source for medium charge state light ions
D. Button, M. A. C. Hotchkis, and G. N. Milford
At the Australian Nuclear Science and Technology Organization we are developing a new isotope ratio mass spectrometer based on the measurement of multiple charge state ions. We have carried out a review of our existing ECR ion source and identified a number of design flaws. For the new instrument, w ... [Rev. Sci. Instrum. 83, 02A322 (2012)] published Thu Feb 9, 2012.
Reliability test of an electron cyclotron resonance ion source for accelerator driven sub-critical system
B. Cui, B. Tang, R. Ma, Q. Huang, Y. Ma et al.
The reliability test of an electron cyclotron resonance ion source developed for accelerator driven sub-critical system is carried out in China Institute of Atomic Energy. A unique technique to improve the reliability is adopted. The source is operated for more than 200 h at 75 keV, 100 mA extracted ... [Rev. Sci. Instrum. 83, 02A321 (2012)] published Thu Feb 9, 2012.
The magnetostrictive material effects on magnetic field sensitivity for magnetoelectric sensor
Lei Chen, Ping Li, Yumei Wen, and Jing Qiu
The magnetic sensitivity to magnetic field for the magnetoelectric (ME) sensor is studied. Theoretical analysis predicts that the ME voltage sensitivity to H (i.e., [partial-derivative]V/[partial-derivative]H under dc bias field) and the ME voltage sensitivity to H (i.e., [partial-derivative]V/[part ... [J. Appl. Phys. 111, 07E503 (2012)] published Thu Feb 9, 2012.
Ultra-sensitive thermal conductance measurement of one-dimensional nanostructures enhanced by differential bridge
Matthew C. Wingert, Zack C. Y. Chen, Shooshin Kwon, Jie Xiang, and Renkun Chen
Thermal conductivity of one-dimensional nanostructures, such as nanowires, nanotubes, and polymer chains, is of significant interest for understanding nanoscale thermal transport phenomena as well as for practical applications in nanoelectronics, energy conversion, and thermal management. Various te ... [Rev. Sci. Instrum. 83, 024901 (2012)] published Thu Feb 9, 2012.
3D mechanical measurements with an atomic force microscope on 1D structures
Christian Kallesoe, Martin B. Larsen, Peter Boggild, and Kristian Molhave
We have developed a simple method to characterize the mechanical properties of three dimensional nanostructures, such as nanorods standing up from a substrate. With an atomic force microscope the cantilever probe is used to deflect a horizontally aligned nanorod at different positions along the nano ... [Rev. Sci. Instrum. 83, 023704 (2012)] published Thu Feb 9, 2012.
Stretched wire measurement of multipole accelerator magnets
G. Le Bec, J. Chavanne, and Ch. Penel
Theoretical aspects of stretched wire field integral measurements are investigated. A least square approach is used for the processing of the measured signal; it can be applied to any wire trajectory and it allows numerical correction of the wire position errors. Moreover, the signal from some multi ... [Phys. Rev. ST Accel. Beams 15, 022401 ] published .
Array of 12 coils to measure the position, alignment, and sensitivity of magnetic sensors over temperature
Hendrik Husstedt, Udo Ausserlechner, and Manfred Kaltenbacher
A measurement setup is presented that allows one to determine the position, alignment, and sensitivity of magnetic sensors over temperature. To this end, an array of 12 coils is used where the number of coils is larger than the number of unknowns to increase accuracy, and to ensure an adequate measu ... [J. Appl. Phys. 111, 07E501 (2012)] published Wed Feb 8, 2012.
Low energy beam transport for facility for rare isotope beams driver linear particle accelerator
L. T. Sun, D. Leitner, G. Machicoane, E. Pozdeyev, V. Smirnov et al.
The driver linac for the facility for rare isotope beams (FRIB) will provide a wide range of primary ion beams for nuclear physics research. The linac will be capable of accelerating a uranium beam to an energy of up to 200 Mev/u and delivering it to a fragmentation target with a maximum power of 40 ... [Rev. Sci. Instrum. 83, 02B705 (2012)] published Wed Feb 8, 2012.
Electrostatic energy analyzer measurements of low energy zirconium beam parameters in a plasma sputter-type negative ion source
Giovanni M. Malapit, Christian Lorenz S. Mahinay, Matthew D. Poral, and Henry J. Ramos
A plasma sputter-type negative ion source is utilized to produce and detect negative Zr ions with energies between 150 and 450 eV via a retarding potential-type electrostatic energy analyzer. Traditional and modified semi-cylindrical Faraday cups (FC) inside the analyzer are employed to sample negat ... [Rev. Sci. Instrum. 83, 02B704 (2012)] published Wed Feb 8, 2012.
Effects of electrode geometry on the ion beam extraction of closed drift type anode layer linear ion source
Seunghun Lee, Jong-Kuk Kim, and Do-Geun Kim
Closed drift type anode layer linear ion source was investigated with focusing on the electrode geometry effects on ion beam emission and anode layer formation. In the electrode geometry, the discharge gap between anode and cathode plays an important role to control anode layer formation as well as ... [Rev. Sci. Instrum. 83, 02B703 (2012)] published Wed Feb 8, 2012.
New laser setup for the selective isotope production and investigation in a laser ion source at the IRIS (Investigation of Radioactive Isotopes on Synchrocyclotron) facility
A. E. Barzakh, D. V. Fedorov, V. S. Ivanov, P. L. Molkanov, V. N. Panteleev et al.
New laser installation for the resonance ionization spectroscopy in a laser ion source and for rare isotope production has been recently put into operation at the IRIS (Investigation of Radioactive Isotopes on Synchrocyclotron) facility (Petersburg Nuclear Physics Institute, Gatchina). This is a sig ... [Rev. Sci. Instrum. 83, 02B306 (2012)] published Wed Feb 8, 2012.
Initial commissioning results with the NSCL Electron Beam Ion Trap
S. Schwarz, G. Bollen, J. R. Crespo Lopez-Urrutia, O. Kester, K. Kittimanapun et al.
The ReA reaccelerator is being added to the National Superconducting Cyclotron Laboratory (NSCL) fragmentation facility in order to provide exotic rare-isotope beams, not available at the Isotope Separation On-Line facilities, in the several-MeV/u energy range. The first stage of the NSCL reaccelera ... [Rev. Sci. Instrum. 83, 02A908 (2012)] published Wed Feb 8, 2012.
Off-line ionization tests using the surface and the plasma ion sources of the SPES project
M. Manzolaro, M. Manente, D. Curreli, J. Vasquez, J. Montano et al.
The development of new target ion source systems for the selective production of exotic species (SPES) facility is currently in progress at Legnaro National Laboratories. In this context, the study of ion sources and their performance in terms of ionization efficiency and transversal emittance is a ... [Rev. Sci. Instrum. 83, 02A907 (2012)] published Wed Feb 8, 2012.
Profiles of ion beams and plasma parameters on a multi-frequencies microwaves large bore electron cyclotron resonance ion source with permanent magnets
Yushi Kato, Naoki Sakamoto, Ryutaro Kiriyama, Tomoya Takenaka, Yosuke Kurisu et al.
In order to contribute to various applications of plasma and beams based on an electron cyclotron resonance, a new concept on magnetic field with all magnets on plasma production and confinement has been proposed with enhanced efficiency for broad and dense ion beam. The magnetic field configuration ... [Rev. Sci. Instrum. 83, 02A317 (2012)] published Wed Feb 8, 2012.
Light ion source for proton/deuteron production at CEA Saclay for the Spiral2 project
O. Tuske, G. Adroit, O. Delferriere, J-F. Denis, Y. Gauthier et al.
The production of rare radioactive ion beam (RIB) far from the valley of stability is one of the final purposes of the Spiral2 facility in Caen. The RIB will be produced by impinging a deuteron beam onto a carbon sample to produce a high neutron flux, which will interact with a uranium target. The p ... [Rev. Sci. Instrum. 83, 02A316 (2012)] published Wed Feb 8, 2012.
Development of compact linear accelerator in KBSI
Jang-Hee Yoon, Byoung-Seob Lee, Seyong Choi, Jin Yong Park, Jung-Woo Ok et al.
The compact linear accelerator using a 28 GHz ECRIS is under construction in KBSI, South Korea. The main capability of this facility is the production of fast neurons for the neutron radiography. The designing of a superconducting magnet, microwave transmission system, beam extraction, and plasma ch ... [Rev. Sci. Instrum. 83, 02A315 (2012)] published Wed Feb 8, 2012.
Note: A signal-to-noise ratio enhancement based on wafer light irradiation system for optical modulation spectroscopy measurement
H. Chouaib and P. V. Kelly
We have recently found that the magnitude of the photoreflectance (PR) signal DeltaR/R on silicon wafers depends on the duration of continuous probe or pump beams irradiation. This temporal behavior of the DeltaR/R signal is attributed to the defects related electronic states at the Si/ SiO interfac ... [Rev. Sci. Instrum. 83, 026104 (2012)] published Wed Feb 8, 2012.
A plastic miniature x-ray emission spectrometer based on the cylindrical von Hamos geometry
B. A. Mattern, G. T. Seidler, M. Haave, J. I. Pacold, R. A. Gordon et al.
We present a short working distance miniature x-ray emission spectrometer (miniXES) based on the cylindrical von Hamos geometry. We describe the general design principles for the spectrometer and detail a specific implementation that covers Kbeta and valence level emission from Fe. Large spatial and ... [Rev. Sci. Instrum. 83, 023901 (2012)] published Wed Feb 8, 2012.
Four-mode plasmonic structure based on a prism-grating anticrossing bandgap
R. Chulia-Jordan and D. Santamaria-Perez
We have developed a plasmonic structure based on an anticrossing bandgap prism-grating coupling technique. We observe that up to four surface plasmons can be excited simultaneously in this plasmonic structure. Initial experiments confirm that such a plasmonic structure can improve sensor performance ... [Appl. Phys. Lett. 100, 063301 (2012)] published Tue Feb 7, 2012.
Fourier-transform photocurrent spectroscopy using a supercontinuum light source
Christian Petermann, Rene Beigang, and Peer Fischer
We demonstrate an implementation of frequency-encoded photocurrent spectroscopy using a super-continuum light source. The spectrally broad light is spatially dispersed and modulated with a special mechanical chopper design that permits a continuous wavelength-dependent modulation. After recombinatio ... [Appl. Phys. Lett. 100, 061108 (2012)] published Tue Feb 7, 2012.
X-ray spatial frequency heterodyne imaging
Binbin Wu, Yanan Liu, Christoph Rose-Petruck, and Gerald J. Diebold
We derive an expression for the electric field at the image plane from the Kirchhoff-Fresnel integral for a grating in contact with an object in an x-ray, in-line imaging configuration that shows the grating to give a heterodyning effect. We also show how image contrast in a harmonic of the grating ... [Appl. Phys. Lett. 100, 061110 (2012)] published Tue Feb 7, 2012.
The development of the radio frequency driven negative ion source for neutral beam injectors (invited)
W. Kraus, U. Fantz, P. Franzen, M. Froschle, B. Heinemann et al.
Large and powerful negative hydrogen ion sources are required for the neutral beam injection (NBI) systems of future fusion devices. Simplicity and maintenance-free operation favors RF sources, which are developed intensively at the Max-Planck-Institut fur Plasmaphysik (IPP) since many years. The ne ... [Rev. Sci. Instrum. 83, 02B104 (2012)] published Tue Feb 7, 2012.
Prospects for advanced electron cyclotron resonance and electron beam ion source charge breeding methods for EURISOL
P. Delahaye, A. Galata, J. Angot, G. Ban, L. Celona et al.
As the most ambitious concept of isotope separation on line (ISOL) facility, EURISOL aims at producing unprecedented intensities of post-accelerated radioactive isotopes. Charge breeding, which transforms the charge state of radioactive beams from 1+ to an n+ charge state prior to post-acceleration, ... [Rev. Sci. Instrum. 83, 02A906 (2012)] published Tue Feb 7, 2012.
Production of rare isotope beams at the Texas A&M University Cyclotron Institute
G. Tabacaru, D. P. May, J. Arje, G. Chubarian, H. Clark et al.
The Cyclotron Institute at Texas A&M is currently configuring a scheme for the production of radioactive-ion beams that incorporates a light-ion guide and a heavy-ion guide coupled with an electron-cyclotron-resonance ion source constructed for charge-breeding. This scheme is part of an upgrade to t ... [Rev. Sci. Instrum. 83, 02A905 (2012)] published Tue Feb 7, 2012.
Simulation of H ion source extraction systems for the Spallation Neutron Source with Ion Beam Simulator
T. Kalvas, R. F. Welton, O. Tarvainen, B. X. Han, and M. P. Stockli
A three-dimensional ion optical code IBSimu, which is being developed at the University of Jyvaskyla, features positive and negative ion plasma extraction models and self-consistent space charge calculation. The code has been utilized for modeling the existing extraction system of the H ion source o ... [Rev. Sci. Instrum. 83, 02A705 (2012)] published Tue Feb 7, 2012.
Initial study of the optical spectrum of the ISIS H ion source plasma
S. R. Lawrie, D. C. Faircloth, and K. Philippe
The front end test stand is being constructed at the Rutherford Appleton Laboratory, with the aim of producing a 60 mA, 2 ms, 50 Hz, perfectly chopped H ion beam. To meet the beam requirements, a more detailed understanding of the ion source plasma is required. To this end, an initial study is made ... [Rev. Sci. Instrum. 83, 02A704 (2012)] published Tue Feb 7, 2012.
Status of the plasma generator of the superconducting proton linac
M. Kronberger, D. Faircloth, J. Lettry, M. Paoluzzi, H. Pereira et al.
In the framework of the superconducting proton linac (SPL) study at CERN, a new non-cesiated H plasma generator driven by an external 2 MHz RF antenna has been developed and successfully operated at repetition rates of 50 Hz, pulse lengths of up to 3 ms, and average RF powers of up to 3 kW. The coup ... [Rev. Sci. Instrum. 83, 02A703 (2012)] published Tue Feb 7, 2012.
Angular distribution of plasma in the vacuum arc ion source
A. G. Nikolaev, G. Yu. Yushkov, K. P. Savkin, and E. M. Oks
This paper presents measurements of the angular distribution of the plasma components and different charge states of metal ions generated by a MEVVA-type ion source and measured by a time-of-flight mass-spectrometer. The experiments were performed for different cathode materials (Al, Cu, and Ti) and ... [Rev. Sci. Instrum. 83, 02A503 (2012)] published Tue Feb 7, 2012.
Design of the injection beamline for the Californium Rare Isotope Breeder Upgrade electron beam ion source charge breeder
C. A. Dickerson, B. Mustapha, S. Kondrashev, P. N. Ostroumov, G. Savard et al.
The design of the ion injection line connecting the electron beam ion source (EBIS) charge breeder and the Californium Rare Isotope Breeder Upgrade radio frequency quadrupole cooler-buncher at the Argonne Tandem Linear Accelerator System was investigated with particle tracking simulations. The injec ... [Rev. Sci. Instrum. 83, 02A502 (2012)] published Tue Feb 7, 2012.
The effect of gas mixing and biased disc voltage on the preglow transient of electron cyclotron resonance ion source
O. Tarvainen, V. Toivanen, J. Komppula, T. Kalvas, and H. Koivisto
The effect of gas mixing and biased disc voltage on the preglow of electron cyclotron resonance ion source plasma has been studied with the AECR-U type 14 GHz ion source. It was found that gas mixing has a significant effect on the preglow. The extracted transient beam currents and efficiency of the ... [Rev. Sci. Instrum. 83, 02A314 (2012)] published Tue Feb 7, 2012.
Molecular and negative ion production by a standard electron cyclotron resonance ion source
R. Racz, S. Biri, Z. Juhasz, B. Sulik, and J. Palinkas
Molecular and negative ion beams, usually produced in special ion sources, play an increasingly important role in fundamental and applied atomic physics. The ATOMKI-ECRIS is a standard ECR ion source, designed to provide highly charged ion (HCI) plasmas and beams. In the present work, H, O, OH, O, C ... [Rev. Sci. Instrum. 83, 02A313 (2012)] published Tue Feb 7, 2012.
Non-contact thrust stand calibration method for repetitively pulsed electric thrusters
Andrea R. Wong, Alexandra Toftul, Kurt A. Polzin, and J. Boise Pearson
A thrust stand calibration technique for use in testing repetitively pulsed electric thrusters for in-space propulsion has been developed and tested using a modified hanging pendulum thrust stand. In the implementation of this technique, current pulses are applied to a solenoid to produce a pulsed m ... [Rev. Sci. Instrum. 83, 025103 (2012)] published Tue Feb 7, 2012.
A nanopositioner for scanning probe microscopy: The KoalaDrive
Vasily Cherepanov, Peter Coenen, and Bert Voigtlander
We present a new type of piezoelectric nanopositioner called KoalaDrive which can have a diameter less than 2.5 mm and a length smaller than 10 mm. The new operating principle provides a smooth travel sequence and avoids shaking which is intrinsic to nanopositioners based on inertial motion with saw ... [Rev. Sci. Instrum. 83, 023703 (2012)] published Tue Feb 7, 2012.
Reversible electron beam heating for suppression of microbunching instabilities at free-electron lasers
Christopher Behrens, Zhirong Huang, and Dao Xiang
The presence of microbunching instabilities due to the compression of high-brightness electron beams at existing and future x-ray free-electron lasers (FELs) results in restrictions on the attainable lasing performance and renders beam imaging with optical transition radiation impossible. The instab ... [Phys. Rev. ST Accel. Beams 15, 022802 ] published .
Level structure in the transitional nucleus Au
S. C. Wang, X. H. Zhou, Y. D. Fang, Y. H. Zhang, N. T. Zhang et al.
Excited states in Au have been studied experimentally via the Os(Li, 4n) reaction at a beam energy of 44 MeV. Based on the gamma-gamma-t coincidence measurement, a level scheme consisting of 15 new transitions and 10 new levels is established for Au. The triaxial shape-polarizing effect of the high- ... [Phys. Rev. C 85, 027301 ] published .
The EXO-200 detector, part I: Detector design and construction. (arXiv:1202.2192v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/
Ultra-low-phase-noise cryocooled microwave dielectric-sapphire-resonator oscillators with frequency instability below 1 x 10^-16. (arXiv:1202.2206v1 [physics.ins-det])
ePrint arXiv http://arXiv.org/
DC readout experiment in Enhanced LIGO. (arXiv:1110.2815v2 [physics.ins-det] UPDATED)
ePrint arXiv http://arXiv.org/
Readout system with on-board demodulation for CMB polarization experiments using coherent polarimeter arrays. (arXiv:1112.0644v3 [astro-ph.IM] UPDATED)
ePrint arXiv http://arXiv.org/
Time and position sensitive single photon detector for scintillator read-out. (arXiv:1201.2559v2 [physics.ins-det] UPDATED)
ePrint arXiv http://arXiv.org/
Acrylic Target Vessels for a High-Precision Measurement of theta13 with the Daya Bay Antineutrino Detectors. (arXiv:1202.2000v2 [physics.ins-det] UPDATED)
ePrint arXiv http://arXiv.org/