Sökresultat

Byggnaders energibehov behöver minska i kombination med att energiförsörjningen (el, värme, gas, med mera) behöver fasa ut an­vändandet av fossila bränslen för att motverka den pågående kli­matförändringen. Olika strategier kan tillämpas för att utforma och bygga/renovera energieffektiva byggnader. En viktig åtgärd, oavsett strategi, är att minska energibehovet, vilket i Sverige vanligtvis inne­fa

Inom kort ska alla byggnader som uppförs inom EU vara nära-noll-energibyggnader. Det kräver förändring av den rådande byggnads-marknadens strukturer. CRAVEzero fokuserar på beprövade och nya metoder för att minska kostnaderna för nära-nollenergibyggnader i alla livscykelstadier genom att identifiera och eliminera de extra kostnaderna som är relaterade till processer, teknik och byggnadsdrift.

In March 2023, the Swedish national Board of Housing, Building and Planning (Boverket) published a proposal for new ventilation rates in Sweden. The supply air should by this be calculated based on an equation using the heated floor area as the main input. It is set as optional to use less ventilation flow if this could be sufficient. However, in a questionnaire to Swedish practitioners within the

Protein denaturation and aggregation resulting from the effects of interfacial stress that can be enhanced by flow and shear stress pose significant challenges in the production of therapeutic proteins such as monoclonal antibodies. The influence of flow on protein stability is closely intertwined with interfacial effects. In this study, we have developed a microfluidic device capable of exposing

To get information about arrival of the electron bunch relative to the laser pulse; electro-optic detection scheme in near-crossed polarizer configuration was set up and tested. Electron bunch induced birefringence in ZnTe crystal leaves a polarization footprint in a chirped infrared pulse. The IR pulse is sampled before third harmonic generation from the amplifier, stretched and synchronized to t

A facility for seeding and harmonic generation utilizing an optical klystron is under commissioning at MAX-lab. The facility utilizes the 400 MeV linac accelerator, improved operation of an RF-gun, an undulator system of two undulators and a magnetic chicane and combined laser system for gun and seeding. The goal is to seed the electron beam at 263 nm and generate the harmonics 2-5 (131-53 nm). Cu

A European project to develop the first storage ring free-electron laser on a third-generation synchrotron radiation facility is presented, including a description of the main features, initial performance at 350 and 220 nm and future prospects.

A method to achieve spatial bunching on the double frequency of the induced energy spread in an optical klystron is described. Criteria necessary to construct such a second order buncher and the phase space evolution are presented.

The initial concept of the electromagnetic elliptical wiggler (EEW) for ELETTRA is a combination of a vertical permanent magnet to generate a wiggler field and a horizontal electromagnet to provide the possibility of switching the helicity of the X-ray radiation. The main aspects of the design of the EEW under construction for ELETTRA are discussed.

We present the results of extensive beam dynamic simulations that have been carried out in order to study the non-linear effects of an electromagnetic elliptical wiggler, presently under construction for ELETTRA, using different symplectic tracking methods implemented in the codes BETA and RACETRACK.

An FEL test facility is built on the existing MAX-lab linac system in collaboration between MAX-lab and BESSY. The goal is to study and analyse seeding, harmonic generation, beam compression and diagnostic techniques with the focus of gaining knowledge and experience for the MAX IV FEL and the BESSY FEL projects. The test facility will in the first stage be using the 400 MeV linac beam to generate

An undulator operating at radiation wavelengths between 250 and 2000 Å has been constructed at the Technical Research Centre of Finland and recently installed at the MAX storage ring in Lund. The undulator utilizes ferrite permanent magnets in the hybrid configuration. The magnetic and mechanical design, calculated performance and influence on the electron beam of the undulator are discussed.

Though the pandemic has passed, social media-based messaging continues to exhibit COVID-19-related cues (e.g., wearing a face mask to stay safe), continuing to foster consumers’ health-protective behavior. However, it remains unclear how social media communications (e.g., advertising) affect such behavior, exposing an important literature-based gap. Addressing this gap, we deploy Ducoffe’s adverti