Articles

Control of large helium cryogenic systems: a case study on CERN LHC

The CERN cryogenic facilities demand a versatile, distributed, homogeneous and highly reliable control system. For this purpose, CERN conceived and developed several frameworks (JCOP, UNICOS, FESA, CMW), based...

Authors: Marco Pezzetti

Straightening of superconducting HERA dipoles for the any-light-particle-search experiment ALPS II

At DESY the ALPS II experiment is being installed in the HERA tunnel to search for axion like particles. A laser beam will be injected into the magnetic field of a string of superconducting (s.c.) dipole magne...

Authors: Clemens Albrecht, Serena Barbanotti, Heiko Hintz, Kai Jensch, Ronald Klos, Wolfgang Maschmann, Olaf Sawlanski, Matthias Stolper and Dieter Trines

Cryogenic control system operational experience at SNS

The helium cryogenic system at Spallation Neutron Source (SNS) provides cooling to 81 superconducting radio frequency cavities. To support the operation of the cryogenic facility, a highly reliable control sys...

Authors: M. Howell, S.-H. Kim, M. Martinez and K. White

Fast decay of 2³S₁ positronium atoms in an MgO lined cavity

Authors: Lokesh Gurung, Tamara J. Babij and David B. Cassidy

Integrated end-to-end instrumentation for the study of whispering gallery modes in dynamic liquid micro-cavities coupled to sub-micron tapered fibers

An integrated table-top facility with the end-to-end instrumentation for the study of high-Q Whispering Gallery Modes in solid and liquid micro-cavities is described, with emphasis on the in situ fabrication of r...

Authors: Meenakshi Gaira and C.S. Unnikrishnan

Influence of the nozzle head geometry on the energy flux of an atmospheric pressure plasma jet

The influence of different nozzle head geometries and, therefore, the variation of the excitation and relaxation volume on the energy flux from an atmospheric pressure plasma jet to a surface have been investi...

Authors: Thorben Kewitz, Christoph Regula, Maik Fröhlich, Jörg Ihde and Holger Kersten

Evaluation of CCD cameras for beam profile monitoring with high intensity particle beams traversing gases

Measurements of the absolute sensitivity of three different optical cameras are presented. An absolutely calibrated tungsten strip-lamp was used for calibrating the devices. An experimental method for determin...

Authors: Raphael Hampf, Andreas Ulrich and Jochen Wieser

RF deflecting cavity for fast radioactive ion beams

The Facility for Rare Isotope Beams (FRIB) will be a new scientific user facility that produces rare-isotope beams for experiments from the fragmentation of heavy ions at energies of 100–200 MeV/u. During the ...

Authors: S. V. Kutsaev, A. S. Plastun, R. Agustsson, D. Bazin, N. Bultman, P. N. Ostroumov, A. Y. Smirnov, K. Taletski, O. Tarasov and R. G. T. Zegers

Versatile cryogen-free cryostat for the electromagnetic characterization of superconducting radiofrequency coils

The use of high temperature superconducting (HTS) radio frequency (RF) coils in Magnetic Resonance Imaging (MRI) greatly improves the signal-to-noise ratio (SNR) in many biomedical applications and particularl...

Authors: Isabelle Saniour, Michel Geahel, Javier Briatico, Cornelis J. van der Beek, Georges Willoquet, Laurène Jourdain, Bertrand Baudouy, Gilles Authelet, Jean-Christophe Ginefri, Luc Darrasse and Marie Poirier-Quinot

Optical excitation of atomic force microscopy cantilever for accurate spectroscopic measurements

Reliable operation of frequency modulation mode atomic force microscopy (FM-AFM) depends on a clean resonance of an AFM cantilever. It is recognized that the spurious mechanical resonances which originate from...

Authors: Yoichi Miyahara, Harrisonn Griffin, Antoine Roy-Gobeil, Ron Belyansky, Hadallia Bergeron, José Bustamante and Peter Grutter

Demonstration of a length control system for ALPS II with a high finesse 9.2 m cavity

Light-shining-through-a-wall experiments represent a new experimental approach in the search for undiscovered elementary particles not accessible with accelerator based experiments. The next generation of thes...

Authors: Jan H. Põld and Aaron D. Spector

Fast neutron sensitivity for ³He detectors and comparison with Boron-10 based neutron detectors

The ³He-based neutron detectors are no longer the default solution for neutron scattering applications. Both the inability of fulfilling the requirements in performance, needed for the new instruments, and the sh...

Authors: Giacomo Mauri, Francesco Messi, Kalliopi Kanaki, Richard Hall-Wilton and Francesco Piscitelli

Low-energy spin-physics experiments with polarized beams and targets at the COSY storage ring

A low-energy spin-physics program is being developed at the COSY storage ring. To support the planned experimental activities, several experimental tools for polarized beams and targets have been developed. Th...

Authors: P. Lenisa, F. Rathmann, L. Barion, S. Barsov, S. Bertelli, V. Carassiti, G. Ciullo, M. Contalbrigo, A. Cotta Ramusino, S. Dymov, R. Engels, D. Eversheim, R. Gebel, K. Grigoryev, J. Haidenbauer, V. Hejny…

Selection and processing of calibration samples to measure the particle identification performance of the LHCb experiment in Run 2

Since 2015, with the restart of the LHC for its second run of data taking, the LHCb experiment has been empowered with a dedicated computing model to select and analyse calibration samples to measure the perfo...

Authors: Roel Aaij, Lucio Anderlini, Sean Benson, Marco Cattaneo, Philippe Charpentier, Marco Clemencic, Antonio Falabella, Fabio Ferrari, Marianna Fontana, Vladimir Vava Gligorov, Donal Hill, Tibaud Humair, Christopher Robert Jones, Oliver Lupton, Sneha Malde, Carla Marin Benito…

Correction to: A supplemental device to return escaping particles to a magnetic mirror reactor

The original version of this article, published on 9 February 2018, contained the following errors. In this Correction, the affected parts of the article are shown. The list of references is available in the o...

Authors: Mitsuaki Nagata and Keiichi Sawada

The planar Multipole Resonance Probe: a functional analytic approach

Active Plasma Resonance Spectroscopy (APRS) is a well known diagnostic method, where a radio frequency probe is immersed into a plasma and excites plasma oscillations. The response of the plasma is recorded as fr...

Authors: M. Friedrichs and J. Oberrath

A detailed account of the measurements of cold collisions in a molecular synchrotron

We have recently demonstrated a general and sensitive method to study low energy collisions that exploits the unique properties of a molecular synchrotron (Van der Poel et al., Phys Rev Lett 120:033402, 2018)....

Authors: Aernout P. P. van der Poel and Hendrick L. Bethlem

Calibration of a multi-anvil high-pressure apparatus to simulate planetary interior conditions

This paper presents the setup and pressure calibration of an 800-ton multi-anvil apparatus installed at the Vrije Universiteit (Amsterdam, the Netherlands) to simulate pressure-temperature conditions in planet...

Authors: J. S. Knibbe, S. M. Luginbühl, R. Stoevelaar, W. van der Plas, D. M. van Harlingen, N. Rai, E. S. Steenstra, R. van de Geer and W. van Westrenen

Schlieren imaging: a powerful tool for atmospheric plasma diagnostic

Schlieren imaging has been widely used in science and technology to investigate phenomena occurring in transparent media. In particular, it has proven to be a powerful tool in fundamental studies and process o...

Authors: Enrico Traldi, Marco Boselli, Emanuele Simoncelli, Augusto Stancampiano, Matteo Gherardi, Vittorio Colombo and Gary S. Settles

An interferometric force probe for beam diagnostics and the study of sputtering

A novel probe for the measurement of forces exerted by a beam of ions and neutral

Authors: Thomas Trottenberg, Alexander Spethmann and Holger Kersten

Design of an environment controlled dew tracking setup to emphasize the role of the relative humidity on breath figures dynamics

In polymer protection pieces, polycarbonate is often used for its transparency and its high impact resistance. However, when dew appears it degrades light transmission and thus transparency. To solve this prob...

Authors: Nicolas Pionnier, Solmaz Boroomandi Barati, Elise Contraires, Rémi Berger, Matthieu Guibert, Stéphane Benayoun and Stéphane Valette

A supplemental device to return escaping particles to a magnetic mirror reactor

Cyclotron resonance is now applied as one of the important means for heating plasma in a fusion reactor. We examined this phenomenon from the viewpoint of electron gyration orbits through a solution of the lin...

Authors: Mitsuaki Nagata and Keiichi Sawada

Optimizing the density of Stark decelerated radicals at low final velocities: a tutorial review

The Stark deceleration technique can produce molecular beams with very low velocities. In order to maximize the density of decelerated molecules, experimental parameters such as the velocity, the velocity spre...

Authors: Dominik Haas, Sebastian Scherb, Dongdong Zhang and Stefan Willitsch

Curie temperature determination via thermogravimetric and continuous wavelet transformation analysis

A cost effective method for conversion of a vertical tube thermogravimetric analysis system into a magnetic balance capable of measuring Curie Temperatures is presented. Reference and preliminary experimental ...

Authors: John Hasier, Maria Annichia Riolo and Philip Nash

Dependence of the confinement time of an electron plasma on the magnetic field in a quadrupole Penning trap

A quadrupole Penning trap is used to confine electrons in weak magnetic fields. Perturbations due to space charge and imperfections in the trap geometry, as well as collisions with the background gas molecules...

Authors: B M Dyavappa, Durgesh Datar, Prakash and Sharath Ananthamurthy

Nano-jet related to Bessel beams and to super-resolutions in microsphere optical experiments

The appearance of a Nano-jet in the microsphere optical experiments is analyzed by relating this effect to non-diffracting Bessel beams. By inserting a circular aperture with a radius of subwavelength dimensio...

Authors: Yacob Ben-Aryeh

The aerosol impact spectrometer: a versatile platform for studying the velocity dependence of nanoparticle-surface impact phenomena

A new apparatus designed to accelerate/decelerate and study the surface impact phenomena of charged aerosols and nanoparticles over a wide range of mass-to-charge (m/z) ratios and final velocities is described. A...

Authors: Brian D. Adamson, Morgan E. C. Miller and Robert E. Continetti

Analysis of passive calorimetric probe measurements at high energy influxes

High energy influxes increase the complexity of passive calorimetric probe measurements because of an increasing temperature of the surrounding materials like the probe holder. This leads to a distinctively di...

Authors: Thorben Kewitz, Maik Fröhlich and Holger Kersten

Sympathetic cooling of molecular ions with ultracold atoms

Sympathetic cooling of molecular ions with ultracold gases is enabling a new era of research in chemistry and physics. There has been much progress in this new field in the last several years and many unantici...

Authors: Eric R. Hudson

Performance of the EUDET-type beam telescopes

Test beam measurements at the test beam facilities of DESY have been conducted to characterise the performance of the EUDET-type beam telescopes originally developed within the EUDET project. The beam telescop...

Authors: Hendrik Jansen, Simon Spannagel, Jörg Behr, Antonio Bulgheroni, Gilles Claus, Emlyn Corrin, David Cussans, Jan Dreyling-Eschweiler, Doris Eckstein, Thomas Eichhorn, Mathieu Goffe, Ingrid Maria Gregor, Daniel Haas, Carsten Muhl, Hanno Perrey, Richard Peschke…

Methods of gas purification and effect on the ion composition in an RF atmospheric pressure plasma jet investigated by mass spectrometry

The analysis of the ion chemistry of atmospheric pressure plasmas is essential to evaluate ionic reaction pathways during plasma-surface or plasma-analyte interactions. In this contribution, the ion chemistry ...

Authors: Simon Große-Kreul, Simon Hübner, Simon Schneider, Achim von Keudell and Jan Benedikt

Design and characterization of a linear quadrupole ion trap for high-resolution Coulomb-crystal time-of-flight mass spectrometry

We present and discuss in detail the design and characterization of a new linear quadrupole ion trap with additional ion ejection and acceleration electrodes that is coupled to a time-of-flight mass spectromet...

Authors: Daniel Rösch, Hong Gao, Ardita Kilaj and Stefan Willitsch

Erratum to: ‘A microfluidic AFM cantilever based dispensing and aspiration platform’

Authors: Ralph van Oorschot, Hector Hugo Perez Garza, Roy J. S. Derks, Urs Staufer and Murali Krishna Ghatkesar

Fabrication of ion-trap electrodes by self-terminated electrochemical etching

Self-terminated electrochemical etching is applied to fabricate needle electrodes for ion traps. We study the surface morphology of the electrodes with scanning electron microscopy and atomic force microscopy,...

Authors: Zhao Wang, Le Luo, Karthik Thadasina, Kim Qian, Jinming Cui and Yunfeng Huang

Rydberg-Stark deceleration of atoms and molecules

The large electric dipole moments associated with highly excited Rydberg states of atoms and molecules make gas-phase samples in these states very well suited to deceleration and trapping using inhomogeneous e...

Authors: Stephen D. Hogan

Anisotropic friction: assessment of force components and resulting trajectories

We report on an experimental device that makes it possible to assess the frictional properties of the contact between a slider and a horizontal surface, and to study the resulting trajectories of the slider wh...

Authors: F. Tapia, D. Le Tourneau and J.-C. Géminard

“The Even-Lavie valve as a source for high intensity supersonic beam”

We use extensive computer simulation to design (and test) a high pressure, fast acting, pulsed, valve that can produce short pulses of gas. We use flow simulations from shaped nozzles to optimize the beam dens...

Authors: U. Even

Erratum to: Analysis of velocity-mapped ion images from high-resolution crossed-beam scattering experiments: a tutorial review

Authors: Alexander von Zastrow, Jolijn Onvlee, David H. Parker and Sebastiaan YT van de Meerakker

Design of a Mars atmosphere simulation chamber and testing a Raman Laser Spectrometer (RLS) under conditions pertinent to Mars rover missions

Raman spectrometry is a powerful technique for the rapid identification of most minerals and organic chemicals without sample preparation. In this context, the European Space Agency (ESA) and NASA selected a R...

Authors: K. Motamedi, AP Colin, JH Hooijschuur, O. Postma, R. Lootens, D. Pruijser, R. Stoevelaar, F. Ariese, I B. Hutchinson, R Ingley and GR Davies

Trapping molecules on chips

In the last years, it was demonstrated that neutral molecules can be loaded on a microchip directly from a supersonic beam. The molecules are confined in microscopic traps that can be moved smoothly over the s...

Authors: Gabriele Santambrogio

Novel experimental setup for time-of-flight mass spectrometry ion detection in collisions of anionic species with neutral gas-phase molecular targets

We report a novel experimental setup for studying collision induced products resulting from the interaction of anionic beams with a neutral gas-phase molecular target. The precursor projectile was admitted int...

Authors: J C Oller, L. Ellis-Gibbings, F. Ferreira da Silva, P. Limão-Vieira and G. García

Optimal beam sources for Stark decelerators in collision experiments: a tutorial review

With the Stark deceleration technique, packets of molecules with a tunable velocity, a narrow velocity spread, and a high state purity can be produced. These tamed molecular beams find applications in high res...

Authors: Sjoerd N Vogels, Zhi Gao and Sebastiaan YT van de Meerakker

Analysis of velocity-mapped ion images from high-resolution crossed-beam scattering experiments: a tutorial review

A Stark decelerator produces beams of molecules with high quantum state purity, and small spatial, temporal and velocity spreads. These tamed molecular beams are ideally suited for high-resolution crossed beam...

Authors: Alexander von Zastrow, Jolijn Onvlee, David H. Parker and Sebastiaan Y.T. van de Meerakker

Merged neutral beams

A detailed description of a merged beam apparatus for the study of low energy molecular scattering is given. This review is intended to guide any scientist who plans to construct a similar experiment, and to p...

Authors: Andreas Osterwalder

Tip-enhanced Raman spectroscopy: principles and applications

This review provides a detailed overview of the state of the art in tip-enhanced Raman spectroscopy (TERS) and focuses on its applications at the horizon including those in materials science, chemical science ...

Authors: Naresh Kumar, Sandro Mignuzzi, Weitao Su and Debdulal Roy

Review of multidimensional data processing approaches for Raman and infrared spectroscopy

Raman and Infrared (IR) spectroscopies provide information about the structure, functional groups and environment of the molecules in the sample. In combination with a microscope, these techniques can also be ...

Authors: Rekha Gautam, Sandeep Vanga, Freek Ariese and Siva Umapathy

An optimized measurement chamber for cantilever array measurements in liquid incorporating an automated sample handling system

Micro- and nanomechanical analytical devices for diagnostics require small sample volumes, and stable and efficient clamping of the sensors for optimized bioassays. A fully automated device for the readout of ...

Authors: Michael Walther, Paul M Fleming, Francesco Padovani and Martin Hegner

Applications of Raman micro-spectroscopy to stem cell technology: label-free molecular discrimination and monitoring cell differentiation

Stem cell therapy is widely acknowledged as a key medical technology of the 21st century which may provide treatments for many currently incurable diseases. These cells have an enormous potential for cell repl...

Authors: Adrian Ghita, Flavius C Pascut, Virginie Sottile, Chris Denning and Ioan Notingher

Implementation of simultaneous quantitative phase with Raman imaging

We present a technical overview of a multimodal system combining Raman microspectroscopy and quantitative phase microscopy (QPM), which allows two independent and simultaneous measurements of both the local mo...

Authors: Nicolas Pavillon and Nicholas I Smith

A microfluidic AFM cantilever based dispensing and aspiration platform

We present the development of a microfluidic AFM (atomic force microscope) cantilever-based platform to enable the local dispensing and aspiration of liquid with volumes in the pico-to-femtoliter range. The pl...

Authors: Ralph van Oorschot, Hector Hugo Perez Garza, Roy J S Derks, Urs Staufer and Murali Krishna Ghatkesar