The student will re-analyze measured phase space scans using the virtual pepper pot method to quantify the x-y beam coupling from gun 5.2 with the symmetric rf coupler. The results will be compared to measurements from previous guns (gun 5.1 or earlier) which used an asymmetric rf coupler.
BabyIAXO is a future experiment located at DESY to search for the dark luminosity of our Sun: hypothetical very lightweight and extremely feebly interacting new particles like the axion. Such bosons are perfect candidates to also explain the dark matter in our Universe. This project is embedded in a study to further expand the science case of BabyIAXO. By adding a new electromagnetic...
While preparing for the bright future with the fourth generation lightsource PETRA IV on the DESY campus we already test and evaluate strategical ingredients for next generation experiment control hard- and software.
The here proposed project focusses on motion control and the potential development of a motion control test bench with real hardware involving stepper motors and piezo drives....
The dCache project provides open-source software that is deployed worldwide to meet the increasingly demanding requirements of scientific storage. It offers a multifaceted approach to support various use cases using the same storage infrastructure, which includes high-throughput data ingestion, data sharing over wide area networks, efficient access from HPC clusters, and long-term data...
Quantum Convolutional Neural Networks (QCNNs) have emerged in recent years as a promising tool in the field of quantum machine learning. Numerous studies have demonstrated that QCNNs can achieve improved accuracy compared to their classical CNN counterparts in various tasks. However, it has recently been shown that QCNNs, when applied to classical data, are classically simulable, raising...
Automation of workflows for HL-LHC Runs 4 and 5.
Project will be co-supervised by Tomas Kello from remote.
STERN (Superradiant THz radiation generation) is a project funded by the European XFEL to develop and provide a high-power terahertz source to enable pump-probe science with the existing high-power X-ray beam. This evasive region of the electromagnetic spectrum has a wide range of applications facilitating the exploration of life and matter science. STERN will use both diffraction targets and...
This project will encompass a small study on IceCube simulation or calibriation data to improve analysis performance or reduce systematic uncertainties.
The diamond anvil cell is a well-established high-pressure technique that enables studies of small material samples at pressures exceeding multiple megabars. It is widely used for investigating strongly correlated systems, particularly at moderate pressures below 50 GPa and low temperatures.
While luminescence standards for pressure determination are well understood under ambient and...
Many BSM models predict the existency of Higgs-like scalars. Future e+e- colliders are specially
suited for searching these scalars, for instance in associated production with a Z boson. The most model-independent
search is based on the recoil of the scalar against the Z boson. This project will determine the
sensitivity of a e+e- linear collider at center-of-mass energy 550 GeV to these...
Global simultaneous fit to CMS data on jets, top quark production and fb asymmetry from Z boson decays together with HERA data. Extract alpha_s. m_t, sin_theta_w, EFT. Data and theory have been prepared for x
The student will design, test, and validate a new setup for a compact optical chopper that will later be a part of the FTIR setup for FEL characterization and material analysis. The project involves 3D modeling, python programming, basic electronics and work with optomechanical systems. Depending on the progress of the project, this chopper will be used for absorption/transmission measurements...
TEMPUS is a versatile pixel detector based on the Timepix4 chip. It offers two operating modes - conventional photon counting, or precise timestamping of individual photons - and is particularly suited to experiments at synchrotrons requiring extreme time resolution.” More information you find...
Associating datasets with persistent identifiers (a globally unique ID) is crucial for ensuring that research outputs are available for open science and comply with the FAIR principles (Findable, Accessible, Interoperable, and Reusable). This enhances the value of the data and it also allows other people to recreate existing work, or to use the data in new and novel research.
Currently,...
This project aims to estimate the current driven by the blazar-induced pair beams deflecting in homogenous intergalactic magnetic fields. The propagation of those very-high-energy gamma rays from Blazars over cosmological distances has been a topic of extensive theoretical and observational investigations, as it offers a unique probe into the intergalactic medium (IGM).
TeV gamma rays...
The portable CT device ENCI, developed by the FS-PETRA group in close collaboration with the Excellence Cluster "Understanding Written Artefacts" at the University of Hamburg, has already been successfully deployed in renowned institutions such as the Louvre and the Museum of Anatolian Civilizations. In these settings, it has revealed the hidden messages of 4000-year-old cuneiform...
This project focuses on analyzing Multi-Wavelength (MWL) data across different energy bands, including TeV, X-rays, and radio, to explore and quantify statistical correlations between different datasets. By utilizing advanced statistical tools and techniques, we aim to investigate the interdependencies and potential physical non-thermal processes linking the emissions observed at different...
This project aims to develop fast methods that can be used for rapidly
recognising valid crystallographic diffraction patterns in our real-time
data processing system. The new methods will be incorporated in
software deployed at facilities around the world.
The identification of jets containing b-hadrons (b-jets) plays a crucial role in the physics program of the ATLAS experiment. This project will focus on improving and evaluating the next iteration of b-tagging algorithms, GN3, and using the FTAG tools currently used in ATLAS. The student will explore quark/gluon tagging with the GN3 tagger, assessing its performance and optimisation...
To develop new schemes for ultrafast laser manufacturing it is key to understand the temporal deformations in materials when illuminated by femtosecond optical lasers. To understand these first instances, the development of new techniques is crucial to retrieve the change in materials shortly after the laser impact. Several femtosecond optical laser pump - X-ray probe experiment have been...
The Standard Model (SM) describes elementary particles and their interactions but may be part of a more general theory. The Belle II experiment tests the SM by studying $B$ meson decays, particularly those with missing energy, which are sensitive to new physics.
A recent Belle II result on $B \to K \nu \bar{\nu}$ shows a deviation from the SM, increasing interest in similar decays. At DESY,...
P66 time-resolved vacuum-ultraviolet spectroscopy beamline started its operation in autumn 2021 and is devoted to the study of the electronic structure of the wide-bandgap luminescent materials. Circularly-polarized luminescence (CPL) is emitted by the chiral enantiopure (no inversion centre) materials and is an interesting fundamental process, structural relationship of which that is not yet...
The MID instrument at the European XFEL performs coherent X-ray scattering experiments in material science of hard and soft condensed matter. The summer student project includes the synthesis of nanoparticle suspensions, as well as their characterization using a dynamic light scattering (DLS) setup in MID’s laboratory.
In the first part, standard colloidal samples of gold or silica...
Future lepton and electron-ion collider concepts rely heavily on silicon sensors as primary tracking devices. Therefore, it is necessary to explore cost-effective silicon sensor technologies that maintain high performance. The Tangerine Project at DESY actively investigates monolithic active pixel sensors (MAPS), developed using 65 nm CMOS imaging technology.
A key objective of the group is...
FCC-ee sensitivity studies to LLPs.
Long-lived ALP - can we see them?
Supervisors will be J. Alimena and L. Rygaard.
In modern thin film technology, spray coating plays a crucial role in fabricating flexible electronics and photovoltaics. The complex interface and multilayer structure are deduced by surface-sensitive scattering methods [1]. Spray coating was applied to create functional layers, from novel latex colloids to complex biomaterials templates [2,3]. There is a strong need to go beyond a...
A fundamental process in quantum electrodynamics is the production of pairs of leptons emerging from collisions between high energy photons. At the LHC we can produce this process in the laboratory by exploiting the LHC as a photon collider. The electromagnetic field surrounding LHC protons act as a cloud of high energy virtual photons. When LHC protons narrowly miss one another collisions...
The experiments at X-ray Free Electron Lasers (XFEL) enable to study matter at unique conditions. To fully exploit this potential, new methods must be developed to extract information that is not accessible with other x-ray sources. Within the project, students will have the opportunity to work with recent XFEL experimental data on resonant x-ray scattering from crystalline samples. Depending...
In X-ray Scanning Microscopy techniques, the sample is conventionally scanned through the X-ray beam. However, for very fast measurements and sample systems contained in heavy in-situ environments, this approach is limited by the mechanics of the scanning stage.
It is therefore desirable to develop a microscope that scans the X-ray beam over a stationary sample. One problem in such a system...
Supernova remnants are still the best candidates for for the origin of the majority of the Galactic cosmic-rays - the charged particles, that constantly bombard Earth from outer space. Despite the fact that our understanding of the acceleration process that energizes this cosmic-rays greatly improved since it first proposal in the middle of the last century, many details of the acceleration...
Intense x-ray pulses from x-ray free-electron lasers (XFELs) can produce matter at extreme conditions. This can be used to gain insight on stellar and planetary interiors or on high-energy density plasmas in inertial confinement fusion. Because of the ultrashort pulse duration, XFEL-produced plasmas are initially out of equilibrium, and the ensuing thermalization dynamics are not well...
Collision events resulting in a top and an anti-top quark ($t\bar{t}$) provide a sensitive probe of phenomena beyond the Standard Model, such as additional neutral Higgs bosons or axion-like particles. Moreover, they provide an ideal test bed to study quantum phenomena, such as spin entanglement, at the TeV scale and in a system of fundamental quarks. Recently, special attention has been drawn...
Our group studies high-efficiency acceleration of charged particle beams in the plasma wakefield experimentally and by numerical simulation (see [1]-[9]). The most impressive experimental results [1] until now in electron accelerating by a wakefield, excited in a plasma, have been achieved using capillary-generated plasma. Plasma-wakefield acceleration provides high accelerating gradients...
Since the first use of photons and neutrons as probes, the Photon and Neutron (PaN) community has been developing an ever increasing portfolio of experimental techniques. These different techniques bear similarities to each other by exploiting similar experimental physical processes, using similar experimental probes, having similar functional dependencies, or having similar purposes. This...
The ILD detector concept has originally been developed for the International Linear Collider. Detailed simulations gauged against the performance of prototype components have shown that ILD in its ILC incarnation is ideally suited to pursue the physics program of a linear Higgs factory as well as of a higher energy e+e− collider. Recently, the ILD collaboration has started to investigate how...
Students learn about methods to investigate the structure and dynamics of systems such as complex liquids and glasses such as small-angle X-ray scattering (SAXS) using coherent X-ray beams, X-ray photon correlation spectroscopy (XPCS) and X-ray cross-correlation analysis (XCCA). In addition, they synthesise colloidal samples in our chemistry lab. Hands-on experiments using laser scattering...
Work on a future outreach project with antennas (also hardware).
The EU funded project Research Facilities 2.0 has the aim to make large scientific infrastructures and institutes more sustainable.
Within the project green and sustainable concepts for the computing infrastructures at DESY for scientific data storage and data analysis are being developed. This not only happens in close collaboration among the various IT teams, but also within other DESY...
Are you curious about how atoms and electrons move on the fastest timescales imaginable? Join the Attosecond Science Group (https://atto.cfel.de) at the Center for Free-Electron Laser Science (CFEL), where we create and harness ultrashort laser pulses with durations in the attosecond (1 as = 10$^{-18}\,$s) and few-femtosecond (1 fs = 10$^{-15}\,$s) range. These pulses allow us to observe and...
Detecting and identifying electrons in the forward region (
|eta| > 2.5 outside the ATLAS tracker acceptance ) it is an
unique feature of the ATLAS experiment. Precise energy
calibration of those electrons is essential for many physics
analyses, particularly in measurements related to the
electroweak mixing angle. Accurate calibration ensures
consistency between data and Monte Carlo (MC)...
The student will develop a formal analysis the optimal experimental parameters in the method of ptychography, in which many coherent X-ray diffraction patterns or holograms are recorded from an object and combined to recover a high-resolution image.
Training of ML tools and optimization of analysis sensitivity.
Developing analysis tools to search for signatures of BSM physics in BSM H-> tau tau
Run 3 data, look for HH -> 4b
ML techniques for s/b discrimination
and b tagging
Generate MC samples, investigate sensitive variables
PUCP ToyDetector C++ simulation with Pythia8 and Fastjet
Rerun simulation and do statistical data analsysis as well
as a search for a new heavy neutrino
Femtosecond lasers have found a wide variety of applications in science and industry. For example, they are used for recording ultrafast molecular movies and for high-precision materials processing. The aim of the summer project is to set-up a femtosecond laser oscillator based on the active material Yb:YLF, which offers exceptional power and energy scalability when cooled to cryogenic...
At the free-electron laser in Hamburg (FLASH) a reaction microscope (REMI) is used to study the dynamics of atoms and small molecules following photoexcitation. With this setup, the momenta of charged fragments (ions and electrons) are measured in coincidence, allowing for detailed insights into molecular states and geometries.
We use a Python program to simulate the trajectories of the...
Gas-phase sono-photonics is an emerging field in photonics where light with potentially extreme parameters is controlled by interaction with intense ultrasound waves in gaseous media like ambient air. However, there are no common ways to quantitatively measure three dimensional sound fields, which is a requirement for future sono-photonic schemes.
This summer student project combines...
The measurement of the top-Higgs coupling is a crucial probe for testing the
validity of the Standard Model. One direct way to explore this coupling is
through the top-associated Higgs boson production process (ttH). On the other
hand, the Higgs decay into a pair of bottom quarks (Hbb) features the largest
branching fraction among all possible channels and thus offers a great incentive
to...
Astrophysical neutrinos, produced in the interaction of accelerated ions with particles or radiation fields, are a key messenger for understanding the origin of ultra-high-energy cosmic rays. However, the sources of astrophysical neutrinos are, for the most part, still unknown. Blazars, active galactic nuclei with relativistic jets pointed towards Earth, are among the most powerful cosmic...
Metal-organic frameworks (MOFs) are modular porous materials synthesized from metal cluster nodes and organic linkers that connect these nodes. These materials have been an object of extensive study for the past two decades, since their ultrahigh porosity (up to 90% free volume) and enormous internal surface areas (extending beyond 6000 m²/g) make them interesting for potential applications in...
This project will introduce the basics of tensor networks and provide an opportunity to apply them to machine learning models through hands-on coding.
Tensor networks in machine learning is a new and exciting area of research with significant applications for the future of science, technology, and humanity. For example, tensor networks can greatly enhance the efficiency of large language...
Vertex detectors play a crucial role in tracking systems for high-energy physics experiments, primarily relying on silicon pixel sensors to identify charged particles. The latest advancements in Monolithic Active Pixel Sensors (MAPS), developed using a 65 nm CMOS imaging process, enable higher circuit densities, allowing for smaller pixel sizes and more complex integrated electronics. These...
Possibility of luminescence excitation with VUV and XUV photons is very important, sometimes critically important for study of widebandgap materials especially if they are developed for high energy applications. Luminescence spectroscopy plays a crucial role include material characterization, biomedical imaging, sensing and lightening techniques, wide bandgap materials engineering....
One of the routine experiments at the P06 scanning microscopy beamline is tomography. Tomography is a 3D imaging technique where a 3-dimensional image of a sample is constructed from a series 2D images taken from different angles. For this, the sample is mechanically rotated, as well as translated in the focused x-ray beam. A critical preparatory step is the alignment of the sample and...
Are you curious about how atoms and electrons move on the fastest timescales imaginable? Join the Attosecond Science Group (https://atto.cfel.de) at the Center for Free-Electron Laser Science (CFEL), where we create and harness ultrashort laser pulses with durations in the attosecond (1 as = 10$^{-18}\,$s) and few-femtosecond (1 fs = 10$^{-15}\,$s) range. These pulses allow us to observe and...
The internship will be an opportunity offered by the FS-SCS group in the photon science division of DESY. The FS-SCS group is mostly invested in investigating energy conversion and structural changes in molecules during chemical reactions, using different pump-probe techniques. The group is well known for studying the time-dependent electronic and spatial behaviors of the molecules under...
Are you curious about how atoms and electrons move on the fastest timescales imaginable? Join the Attosecond Science Group (https://atto.cfel.de) at the Center for Free-Electron Laser Science (CFEL), where we create and harness ultrashort laser pulses with durations in the attosecond (1 as = 10$^{-18}\,$s) and few-femtosecond (1 fs = 10$^{-15}\,$s) range. These pulses allow us to observe and...
