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We calculate equilibrium emittances and damping times due to the emission of synchrotron radiation for coupled storage ring lattices by evaluating the projections of the commonly used synchrotron radiation integrals onto the normal modes of the coupled motion. Orbit distortion is included by calculating off-axis contributions to the radiation integrals. We provide explicit formulae for fast forward calculation, which have been implemented into the interactive lattice design code OPA., Comment: 26 pages, 7 figures

We derive evolution equations for the first and second moments of an initially mismatched, coupled, and displaced arbitrary Gaussian phase-space distribution under the influence of decoherence due to amplitude-dependent tune shift. Moreover, we find expressions for the asymptotic values of the beam matrix and the emittance and use them to evaluate error tolerances for injection., Comment: 24 pages, 5 figures

The FREIA Laboratory at Uppsala University focuses on superconducting technology and accelerator development. It actively supports the development of the European Spallation Source, CERN, and MAX IV, among others. FREIA has developed test facilities for superconducting accelerator technology such as a double-cavity horizontal test cryostat, a vertical cryostat with a novel magnetic field compensation scheme, and a test stand for short cryomodules. Accelerating cavities have been tested in the horizontal cryostat, crab-cavities in the vertical cryostat, and cryomodules for ESS on the cryomodule test stand. High power radio-frequency amplifier prototypes based on vacuum tube technology were developed for driving spoke cavities. Solid-state amplifiers and power combiners are under development for future projects. We present the status of the FREIA Laboratory complemented with results of recent projects and future prospects., Comment: 30 pages, 18 figures

By combining fresh estimates of housing supply and prices with recent long-term projections for their fundamental drivers such as population, income and interest rates, this paper produces scenarios for residential investment and real house prices up to 2050. For half of the covered countries, projected increases in house prices are large enough to outpace real incomes, thereby further eroding housing affordability. The paper illustrates and quantifies how housing policies can make a difference. Removing mortgage interest relief eases price pressures and can contribute to more affordable housing. Likewise, streamlining land-use governance and easing rental control can help unlock housing supply, make housing markets more efficient and, ultimately, housing more affordable.

We describe the design and construction of coils to compensate the Earth&rsquo, s magnetic field in the vertical cryostat GERSEMI in the FREIA laboratory at Uppsala University.

Making housing more affordable ranks high on the policy agenda across the world. One way to achieve affordable housing is to ensure sufficiently elastic supply of the housing stock in response to demand shocks. This paper aims at disentangling policy from non-policy drivers in explaining cross-regional differences in housing supply elasticities. It uses GIS data to account for the presence of natural and man-made obstacles to residential construction in functional urban areas across the 12 OECD countries that provide sufficiently long time series for regional house prices. The results suggest that the presence of water, steep land, parks and high-density urban areas all restrict the supply of housing. However, there remain very large differences in supply elasticities across countries, which corroborates the finding from national analysis that policies have a strong influence.

Housing markets, which are large and subject to sharp swings, shape to a great extent countries’ exposure to economic crises and their capacity to recover from them. This paper analyses the transmission of housing-related shocks to the real economy: it investigates the role that policy plays in (a) mitigating or amplifying shocks and (b) facilitating or hampering a recovery. It considers macroprudential measures, rental regulation, taxation and land use restrictions. The aim is to investigate, which housing policy-related reforms can foster greater economic resilience. Among other results, it finds that a tighter macroprudential stance is generally linked to a lower likelihood of economic crisis and that higher effective rates of housing taxation are associated with smoother housing cycles.

Housing markets are large and highly volatile: they can thus create large macroeconomic risks. The current paper provides a bird’s eye view of where the housing markets of major OECD economies currently stand. It then uses the results of recently developed models to provide indications of where macroeconomic risks exist. Finally, the paper draws on recent empirical analyses to suggest how economic policies can enhance economic resilience by reducing housing-related risks through macroprudential measures and housing market reforms (such as changes in rent regulation, taxation and land use policies).

We developed a model to calculate the stability of Gaussian beam distributions with non-linear space-charge forces in the presence of random and skew-quadrupole errors. The effect of the space-charge force on the beam matrix is calculated analytically including full cross-plane coupling in 4D phase space, which allows us to perform fast parameter studies. For stability analysis, we find the fixed points of the beam including the space-charge forces and construct a Jacobi-matrix by slightly perturbing the periodic solution. The stability of envelope oscillations is inferred by eigenvalue analysis. Furthermore, we employ envelope tracking as a complementary method and compare the results of the eigenvalue analysis with FFT data from the tracked envelope. The non-linearity of the space-charge force in combination with lattice errors and beam coupling opens up for envelope-lattice resonances and envelope coupling resonances. Hitting these resonances leads to envelope blow-up, causing an effective beam mismatch. Therefore, we finally examine the effect of beam mismatch on the envelope tune-shift and its stability.

Starting from a low level in early 2000s, Turkey’s total capital stock has since expanded rapidly, but the composition and quality of investment raises questions. This study focuses on business investment, as the main driver of physical and knowledge-based capital formation and, hence, of potential output and the material foundations of well-being. Micro data allow to distinguish four types of firms: small businesses with a high rate of informality, medium-sized family firms, large formal corporations, and skilled start-ups. The relative importance of the challenges facing these different types of firms varies, notably with respect to skill shortcomings, regulatory burdens, labour costs, access to bank lending, over-leveraging and scarce equity capital. Improving the current business environment and overcoming the fragmentation of the business sector will be crucial to upgrade the quality of business investment and to enhance the allocative efficiency of capital formation. This calls for promoting formality, best management practices, the build-up of equity capital, access to long-term bank financing and other market-based financing that can complement traditional bank lending; and a faster and more inclusive transition to the digital economy.

A e+e- collider of several TeV energy will be needed for the precision studies of any new physics discovered atthe LHC collider at CERN. One promising candidate is CLIC, a linear collider which is ...

In a Swedish citizen science project, more than 200 elementary school classes participated in collecting fungi, soil samples, and droppings from deer and wild boar, from all over Sweden. The samples have been sent to a laboratory at Uppsala University where they are being analyzed through gamma spectroscopy with a shielded HPGe detector. The main objective is to scan the samples for 137Cs from the Chernobyl accident and compare the data with measurements from 1986, but uptake of naturally occuring radionuclides like 40K and radon daughters will also be determined. Together with the soil samples, transfer factors will be derived, and correlations for these factors will be sought for different species of fungi and soil types. The potential for correlating the results with different biological processes will also be investigated, in part through the collected animal droppings. This is a work in progress where the present status of the experimental setup and methodology are presented. Issues with the initial approach for corrections are discussed and preliminary results are presented.

High-precision nuclear physics experiments in storage rings require precise knowledge of the beam energy. In the absence of electron cooling, which provides this information, one can use the frequency of the radio-frequency system in conjunction with knowledge of the circumference of the ring. We investigate to which precision the latter can be determined in the presence of magnet misalignment and orbit correction.

Digitalisation is one of the megatrends affecting societies and labour markets, alongside demographic change and globalisation. The fourth industrial revolution will redesign production processes and alter the relationships between work and leisure, capital and labour, the rich and the poor, the skilled and the unskilled. The degree of disruption induced by the technological transformation ahead largely depends on the policy framework. Digitalisation can lead to anything between soaring inequalities and widespread improvements of living and working conditions. Two main questions arise for policy makers: how to ensure equality of opportunities in the race with technology and how to find the appropriate level of redistribution of the gains associated with digitalisation to preserve social cohesion. Against this backdrop, this working paper will analyse the technology-induced transformation of labour markets, argue for a new social contract and discuss how the provision and use of skills need to adapt to the digital work environment. This working paper relates to the 2017 OECD Economic Survey of Austria (www.oecd.org/eco/surveys/economic-survey-austria.htm).

Despite major progress, Turkey still lags behind most comparable countries in terms of exported value added per capita. Its remarkable economic performance over the past 15 years has not been sufficiently backed by gains in export market shares, in particular when measured in value added terms. While Turkey incorporates an increasing share of foreign value added in its own exports, its capacity to provide intermediate inputs to other countries’ exports is still limited. This paper argues that Turkey’s participation in global value chains remains below potential owing to institutional features that hamper efficient allocation of capital and labour, obstacles inherent in bilateral trade agreements and entry regulations, underdeveloped human capital and insufficient investment in innovation, R&D and knowledge-based capital. Progress along these dimensions would strengthen Turkey’s backward and forward trade linkages and contribute to rebalancing its growth model. The adjustment process towards a more export-oriented economy operating on a level playing field needs to be flanked by dedicated industrial, social and environmental policies to alleviate adverse consequences on displaced firms and workers and the ecosystem.

We propose a novel method to align accelerating structures such as those used in the Compact Linear Collider (CLIC) by exploiting a mode that copropagates with the normal accelerating mode. This mode has an octupolar dependence in the transverse direction and is caused by radial waveguides intended to damp higher-order modes. The nonlinear dependence of the octupolar mode makes it possible to determine the center of the structure from the nonlinear dependence of the transverse kick, observed on a downstream beam position monitor, while changing the transverse position of the beam with respect to the accelerating structures. We discuss the method, its tolerances and disentangling the individual misalignments of two adjacent accelerating structures that are powered from a single source.

There is ample empirical evidence for strong and persistent patterns of separated gender roles in Austria. While this model is generally considered to have worked well in the past, it faces important challenges arising from societal and economic changes in Austria. Hence, gender mainstreaming with the aim of more gender equality ranks high on the agenda of Austrian policy makers. An integrated policy framework to make Austria more gender-equal should build on 3 pillars: i) make the tax and benefit system more employment friendly ii) extend the care service infrastructure and iii) encourage more flexible workplace practices. Streamlining family policies across regions and levels of government would entail efficiency gains for all pillars. Long-run simulations suggest that achieving more gender equality in Austria could boost GDP by 13 percentage points until 2060. In addition, promoting more gender equality in the Austrian Society will improve Austrians’ well-being.

Electrical discharges in accelerating structures are one of the key issues limiting the performance of future high energy accelerators such as the Compact Linear Collider (CLIC). Fundamental unders ...

In the presence of nonnormally distributed asset returns, optimal portfolio selection techniques require estimates for variance-covariance parameters, along with estimates for higher-order moments and comoments of the return distribution. This is a formidable challenge that severely exacerbates the dimensionality problem already present with mean-variance analysis. This article extends the existing literature, which has mostly focused on the covariance matrix, by introducing improved estimators for the coskewness and cokurtosis parameters. We find that the use of these enhanced estimates generates a significant improvement in investors' welfare. We also find that it is only when improved estimators are used that portfolio selection with higher-order moments dominates mean-variance analysis from an out-of-sample perspective. The Author 2009. Published by Oxford University Press on behalf of The Society for Financial Studies. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org, Oxford University Press.

This paper presents a numerical and experimental study of a nearly confocal resonator with spherical mirrors at 12 GHz. The geometry was chosen in order to have a large quality factor for the diffraction losses, and thereby a weak coupling to external parasitic TE and TM modes, that propagate in a pipe on which the resonator may be installed. In turn, this allows a significant improvement of its signal-to-noise ratio, e.g., when used as a beam monitor.

We calculate the orbit response coefficients for an arbitrarily coupled storage ring subject to maintaining the orbit length constant due to the presence of a radio-frequency system.

Economic policies shape how much people earn but also how stable their income and jobs are. The level of earnings and the degree of economic stability both matter for well-being. Micro-level data indicate that, across OECD countries, economic instability is much greater at the level of individuals than at the aggregate level. The present study investigates the effects on micro-level stability of policies that boost growth. Movement from less to more productive processes and firms is at the heart of economic growth, which suggests possible trade-offs between growth and micro-level stability. The analysis indeed finds policy changes that boost growth but increase micro-level instability: reducing the progressivity or size of social transfers (including unemployment benefits) as well as moving from very to moderately tight restrictions on the competition for goods and services and on the dismissal of regular workers. However, the analysis also uncovers that moving to highly competitive policies generally reduces micro-level instability.

Les politiques economiques faconnent les revenus mais aussi leur stabilite ainsi que celle des emplois. De fait, le niveau comme la stabilite des revenus tous deux influencent sur le bien-etre. Cependant, les agregats economiques traditionnels ne mesurent pas l’incertitude economique a laquelle les menages sont effectivement confrontes. Cette etude montre que l’instabilite economique vecue par les menages n’entretient que des liens tres distendus avec la volatilite macroeconomique. Elle utilise plusieurs bases de micro-donnees collectees au niveau des menages pour documenter la maniere dont les reformes encourageant la croissance influencent la stabilite economique des menages. Le mouvement vers des processus et des entreprises de plus en plus productifs se situe au coeur de la dynamique de croissance economique : cette observation suggere qu’une tension peut s’etablir entre croissance et stabilite micro-economique. Certains ajustements des politiques publiques augmentent la croissance, mais au prix d’une plus grande instabilite micro-economique : il s’agit des reformes qui rendent la fiscalite ou les transferts sociaux (y compris les indemnites de chomage) moins progressifs ainsi que des mesures qui remplacent de fortes restrictions sur la concurrence ou sur les licenciements de travailleurs permanents par des restrictions de niveau intermediaire. Neanmoins, l’analyse fait aussi apparaitre que, lorsque les reformes dans ces domaines sont plus appuyees et conduisent a un niveau eleve de concurrence, elles reduisent le plus souvent l’instabilite micro-economique.

Economic policies shape how much people earn as well as how stable their income and jobs are. The level and stability of earnings both matter for well-being. Standard economic aggregates do not measure accurately the economic uncertainty which households are facing. This paper shows that household-level economic instability is only very loosely related to macroeconomic volatility. It uses several household-level databases to document how pro-growth reforms influence household-level economic stability. Movement from less to more productive processes and firms is at the heart of economic growth, which suggests a trade-off between growth and micro-level stability. Certain policy changes boost growth but increase micro-level instability: they include reductions in tax progressivity or social transfers (including unemployment benefits) as well as moves from very to moderately tight restrictions on the flow of goods and services and on the dismissal of regular workers. However, the analysis also uncovers that moving to highly competitive policies generally reduces micro-level instability.

We propose a method to fully determine the transverse beam matrix using a simple setup consisting of two steering magnets, an octupole field and a screen. This works in principle for any multipole field, i.e., sextupole, octupole magnet or a radio frequency structure with a multipole field. We have experimentally verified the method at the Compact Linear Collider Test Facility 3 at CERN using a Compact Linear Collider accelerating structure, which has an octupole component of the radio frequency fields. By observing the position shifts of the beam centroid together with changes in transverse beam size on a screen, we determined the full transverse beam matrix, with all correlations.

Economic policies shape how much people earn but also how stable their income and jobs are. The level of earnings and the degree of economic stability both matter for well-being. Micro-level data indicate that, across OECD countries, economic instability is much greater at the level of individuals than at the aggregate level. The present study investigates the effects on micro-level stability of policies that boost growth. Movement from less to more productive processes and firms is at the heart of economic growth, which suggests possible trade-offs between growth and micro-level stability. The analysis indeed finds policy changes that boost growth but increase micro-level instability: reducing the progressivity or size of social transfers (including unemployment benefits) as well as moving from very to moderately tight restrictions on the competition for goods and services and on the dismissal of regular workers. However, the analysis also uncovers that moving to highly competitive policies generally reduces micro-level instability.

We propose a novel method to measure the time-resolved momentum distribution and size of beams with very large momentum spread. To demonstrate the principle we apply the method to the beam at the end of a Compact Linear Collider decelerator, where conventional diagnostic methods are hampered by the large energy spread of the drive beam after up to 90% of its kinetic energy is converted into microwave power. Our method is based on sweeping the beam in a circular pattern to determine the momentum distribution and recording the beam size on a screen using optical transition radiation. We present an algorithm to extract the time-resolved momentum distribution. Furthermore, the beam size along the bunch train can be extracted from the image left on a screen by sweeping the beam linearly. We introduce the analysis technique and show simulation results that allow us to estimate the applicability. In addition, we present a conceptual design of the technical realization.

La baisse de la volatilite macroeconomique des les annees 1980 jusqu’au debut de la Grande Recession ne s’est pas, en general, traduite par une plus grande stabilite microeconomique. Si la volatilite microeconomique peut traduire des processus generateurs de croissance tels que la destruction creatrice et la reallocation des ressources, la volatilite de la croissance de la consommation pese sur le bien-etre des menages. Cette etude dresse un panorama de la litterature existante sur les liens entre les politiques economiques et la stabilite economique au niveau des entreprises et des menages. En s’appuyant sur des donnees d'entreprises et de menages couvrant un large eventail de pays de l'OCDE, elle fournit egalement des resultats preliminaires sur les caracteristiques de la volatilite microeconomique et ses origines.

Understanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a RF breakdown large electro-magnetic fields are generated and produce parasitic magnetic fields which interact with the accelerated beam affecting its orbit and energy. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch-trains on a nanosecond time-scale showed fast changes in correspondence of breakdown which we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam orbit and we discuss its correlation with RF power and breakdown location in the accelerator structure.

Understanding the effects of RF breakdown in high-gradient accelerator structures on the accelerated beam is an extremely relevant aspect in the development of the Compact Linear Collider (CLIC) and is one of the main issues addressed at the Two-beam Test Stand at the CLIC Test Facility 3 at CERN. During a RF breakdown large electro-magnetic fields are generated and produce parasitic magnetic fields which interact with the accelerated beam affecting its orbit and energy. We discuss here measurements of such effects observed on an electron beam accelerated in a CLIC prototype structure. Measurements of the trajectory of bunch-trains on a nanosecond time-scale showed fast changes in correspondence of breakdown which we compare with measurements of the relative beam spots on a scintillating screen. We identify different breakdown scenarios for which we offer an explanation based also on measurements of the power at the input and output ports of the accelerator structure. Finally we present the distribution of the magnitude of the observed changes in the beam orbit and we discuss its correlation with RF power and breakdown location in the accelerator structure., 10 pages, 8 figures. We replace the previous version of the article with this one, in which we extend our discussion on the experimental set-up and on the interpretation of our measurements, on the basis of the inputs received during the review process for publication on Phys. Rev. Special Topics - Accelerators and Beams. The essence of our conclusions remain unchanged

Refined Fourier analysis of turn-by-turn (TBT) transverse position data measurements can be used for determining several beam properties of a ring, such as transverse tunes, optics functions, phases, chromatic properties and coupling. In particular, the Numerical Analysis of Fundamental Frequencies (NAFF) algorithm is used to analyse TBT data from the Swiss Light Source (SLS) storage ring in order to estimate on and off-momentum beam characteristics. Of particular interest is the potential of using the full position information within one turn in order to measure beam optics properties.

Following the discovery of the Higgs-like boson at the Large Hadron Collider, there is demand for precision measurements on recent findings. The Compact Linear Collider, CLIC, is a candidate for a future linear electron-positron collider for such precision measurements. In CLIC, the beams will be brought to collisions in the multi-TeV regime through high gradient acceleration with high frequency RF power. A high intensity electron beam, the so-called drive beam, will serve as the power source for the main beam, as the drive beam is decelerated in special structures, from which power is extracted and transfered to the main beam. When the drive beam is decelerated the beam quality deteriorates and the momentum spread increases, which makes the beam transport challenging. Dedicated diagnostics to monitor the momentum profile along each bunch train and transverse profile diagnostics will be needed to guarantee the reliability of the decelerator and consequently the power source of the main beam acceleration.A test facility, CTF3, has been constructed at CERN to validate key technical aspects of the CLIC concept. The beam quality in the decelerator will be investigated in the test beam line, TBL, where several power extraction structures reduce the drive beam energy by up to 55%. At the same time, the single-bunch rms energy spread grows from the initial value of 1% to almost 6%. To monitor the parameters of such a beam is challenging but crucial for the optimization of the beamline. In this thesis we report on progress made on adapting generally used methods for beam profile measurements to the demanding conditions of a wide momentum profile. Two detector technologies are used for measuring transverse profile and momentum profile and we discuss the performance of these instruments, in the view of the large momentum spread and with the outlook towards equivalent beam profile monitors in the CLIC decelerator.

Debt levels have surged since the mid-1990s and have reached historic highs across the OECD. High debt levels can create vulnerabilities, which amplify and transmit macroeconomic and asset price shocks. Furthermore, high debt levels hinder the ability of households and enterprises to smooth consumption and investment and of governments to cushion adverse shocks. The empirical evidence suggests that when private sector debt levels, particularly for households, rise above trend the likelihood of recession increases. Measures of financial leverage give less warning and typically only deteriorate once the economy begins to slow and asset prices are falling. Government debt typically rises after the onset of a recession, suggesting that there is a migration of debt across balance sheets. Some policies, such as robust micro prudential regulation and frameworks to deal with debt overhangs and maintain public debt at prudent levels, can help economies withstand adverse shocks. Other policy options, such as addressing biases in tax codes that favour debt financing and targeted macro-prudential policies, will help bring down debt levels and address future run ups in debt.

Using a large panel of OECD countries this paper studies the link between debt and macroeconomic stability by comparing the evolution of balance sheet aggregates and economic output in high- and lowdebt environments. While the relationship between debt and economic growth has been extensively studied in the literature, only little attention has been paid to the impact of debt on volatility and higher moments of output growth distributions. This paper fills in this gap. Debt-fuelled expansions are found to typically last longer but to culminate in a more sizeable downturn. The greater amplitude of business cycles in high-debt environments reflects higher macroeconomic volatility but also higher tail risks and adverse asymmetries in output growth distributions. The induced welfare losses justify policy interventions aiming at preventing excessive build-ups in debt ex-ante.

We discuss X-band rf power production and deceleration in the two-beam test stand of the CLIC test facility at CERN. The rf power is extracted from an electron drive beam by a specially designed power extraction structure. In order to test the structures at high-power levels, part of the generated power is recirculated to an input port, thus allowing for increased deceleration and power levels within the structure. The degree of recirculation is controlled by a splitter and phase shifter. We present a model that describes the system and validate it with measurements over a wide range of parameters. Moreover, by correlating rf power measurements with the energy lost by the electron beam, as measured in a spectrometer placed after the power extraction structure, we are able to identify system parameters, including the form factor of the electron beam. The quality of the agreement between model and reality gives us confidence to extrapolate the results found in the present test facility towards the parameter regime of CLIC.

Strong beam-beam effects at the interaction point of a high-energy ${e}^{+}{e}^{\ensuremath{-}}$ linear collider such as the Compact Linear Collider (CLIC) lead to an emittance growth for the outgoing beams, as well as to the production of beamstrahlung photons and ${e}^{+}{e}^{\ensuremath{-}}$ coherent pairs. In this paper, we present a conceptual design of a 150 m long post-collision extraction line for the CLIC machine at 3 TeV, which separates the various components of the outgoing beam using a vertical magnetic chicane, before transporting them to their respective dump. In addition, detailed studies are performed in order to compute the power losses along the CLIC post-collision line. For the vacuum window at the exit of the post-collision line, we propose a thick (1.5 cm) layer of carbon-carbon composite, with a thin (0.2 mm) aluminum leak-tight foil. The stress levels in this exit window are estimated. Finally, we discuss the use of diagnostics along the post-collision line for monitoring and improving the quality of the ${e}^{+}{e}^{\ensuremath{-}}$ collisions and, in turn, the luminosity of the CLIC machine.

During the preparatory work for the optical-replica synthesizer experiment in the free-electron laser FLASH at DESY, we were able to superimpose a short, approximately 200 fs long pulse from a frequency-doubled mode-locked erbium laser with titanium-sapphire amplifier and an approximately 20 ps long electron bunch in an undulator. This induces an energy modulation in a longitudinal slice of the electron bunch. A magnetic chicane downstream of the undulator converts the energy modulation into a density modulation within the slice that causes the emission of coherent optical transition radiation from a silver-coated silicon screen. Varying the relative timing between electron and laser, we use a camera to record two-dimensional images of the slices as a function of the longitudinal position within the electron bunch.

Udomrat@fnrf.science.cmu.ac.th A new quasi-monoenergetic neutron beam facility has been constructed at The Svedberg Laboratory (TSL) in Uppsala, Sweden. Key features include a neutron energy range of 11 to 175 MeV, high fluxes, user flux control, flexible neutron field size and shape, and spacious and easily accessible user area. The first results of the beam characterization measurements are reported.

9 pp. (2006).

A new quasi-monoenergetic neutron beam facility has been constructed at The Svedberg Laboratory in Uppsala, Sweden. The new facility has been designed specifically to provide optimal conditions for testing of single-event effects in electronics. Key features include a neutron energy range of 20 to 175 MeV, high fluxes, user flux control, flexible neutron field size and shape, and spacious and easily accessible user area. Results of beam characterization measurements are reported.