A5089395078- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Plasma Diagnostics and Applications
- Gyrotron and Vacuum Electronics Research
- Magnetic confinement fusion research
- Laser-induced spectroscopy and plasma
- Particle Detector Development and Performance
- Pulsed Power Technology Applications
- Photocathodes and Microchannel Plates
- Atomic and Molecular Physics
- Superconducting Materials and Applications
- Advanced X-ray Imaging Techniques
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Electrohydrodynamics and Fluid Dynamics
- Electron and X-Ray Spectroscopy Techniques
- Metal and Thin Film Mechanics
- Ionosphere and magnetosphere dynamics
- Electromagnetic Compatibility and Measurements
- Electronic Packaging and Soldering Technologies
- Mass Spectrometry Techniques and Applications
- Laser-Matter Interactions and Applications
- Plant Physiology and Cultivation Studies
- Astrophysics and Cosmic Phenomena
Deutsches Elektronen-Synchrotron DESY
2017-2025
University of California, San Diego
2023
Manufacturing Advocacy & Growth Network (United States)
2023
University College London
2022
University of Strathclyde
2022
Universität Hamburg
2022
Cockcroft Institute
2022
German Institute for Adult Education
2018-2022
Goethe University Frankfurt
2012-2015
Energy-efficient plasma-wakefield acceleration of particle bunches with low energy spread is a promising path to realizing compact free-electron lasers and colliders. High efficiency can be achieved simultaneously by strong beam loading plasma wakefields when accelerating carefully tailored current profiles [M. Tzoufras et al., Phys. Rev. Lett. 101, 145002 (2008)]. We experimentally demonstrate such optimal in nonlinear electron-driven accelerator. Bunches an initial 1 GeV were accelerated...
Abstract The interaction of intense particle bunches with plasma can give rise to wakes 1,2 capable sustaining gigavolt-per-metre electric fields 3,4 , which are orders magnitude higher than provided by state-of-the-art radio-frequency technology 5 . Plasma wakefields can, therefore, strongly accelerate charged particles and offer the opportunity reach energies smaller hence more widely available accelerator facilities. However, luminosity brilliance demands high-energy physics photon...
Particle-beam-driven plasma wakefield acceleration (PWFA) enables various novel high-gradient techniques for powering future compact light-source and high-energy physics applications. Here, a driving particle bunch excites response in medium, which may rapidly accelerate trailing witness beam. In this Letter, we present the measurement of ratios to deceleration driver bunch, so-called transformer ratio, significantly exceeding fundamental theoretical thus far experimental limit 2 PWFA. An...
Abstract Objective. The Photo Injector Test facility at DESY in Zeuthen (PITZ) is building up an R&D platform, known as FLASHlab@PITZ, for systematically studying the FLASH effect cancer treatment with its high-brightness electron beams, which can provide a uniquely large dose parameter range radiation experiments. In this paper, we demonstrate capabilities by experiments reduced on startup beamline and study potential performance of full simulations. Approach. To measure dose,...
Temporally modulated electron beams have a wide array of applications ranging from the generation coherently enhanced electromagnetic radiation to resonant excitation wakefields in advanced-accelerator concepts. Likewise producing low-energy ultrashort microbunches could be useful for ultrafast diffraction and new accelerator-based light-source In this Letter we propose experimentally demonstrate passive microbunching technique capable forming picosecond bunch train at...
This document provides detailed information on the status of Advanced and Novel Accelerators techniques describes steps that need to be envisaged for their implementation in future accelerators, particular high energy physics applications. It complements overview prepared update European Strategy particle physics, a description field. The scientific priorities community are described each technique acceleration able achieve accelerating gradient GeV~range or above. ALEGRO working group...
Electron photoinjectors provide high-brightness electron beams to numerous research applications in physics, chemistry, material, and life sciences. Semiconductor photocathodes are widely used here, as they enable the production of low-emittance with variable charge at high repetition rates. One key figures merit is minimum achievable bunch length. In semiconductor cathodes, this dominated by scattering effects varying penetration depths extracting photons, which leads a characteristic...
For plasma-wakefield accelerators to fulfill their potential for cost effectiveness, it is essential that energy-transfer efficiency be maximized. A key aspect of this the near-complete transfer energy, or depletion, from driver electrons plasma wake. Achieving full depletion limited by process re-acceleration, which occurs when decelerate nonrelativistic energies, slipping backward into accelerating phase wakefield and being subsequently re-accelerated. Such re-acceleration unambiguously...
A novel method to determine the total hydrogen density and, accordingly, a precise plasma temperature in lowly ionized is described. The key analyze energy loss of swift heavy ions interacting with respective bound and free electrons plasma. slowly developing theta-pinch prepared. Boltzmann plot Balmer series Stark broadening H_{β} line preliminarily defines electron (1.9±0.1)×10^{16} cm^{-3} 0.8-1.3 eV. uncertainty results wide density, ranging from 2.3×10^{16} 7.8×10^{18} cm^{-3}. 108 MHz...
Beam driven plasma acceleration is one of the most promising candidates for future compact particle accelerator technologies. In this scheme a bunch drives wake in medium. The fields inside can be used to accelerate trailing witness bunch. To maximise ratio between deceleration drive bunch, so called transformer ratio, several methods have been proposed. ones yielding favorable results are based on shaped bunches that long terms wavelength. We present here create such employing temporally...
Self-modulation of an electron beam in a plasma has been observed. The propagation long (several wavelengths) bunch overdense resulted the production multiple bunches via self-modulation instability. Using combination radio-frequency deflector and dipole spectrometer, time energy structure self-modulated was measured. longitudinal phase space measurement showed modulation into three with approximately $200\text{ }\text{ }\mathrm{keV}/c$ amplitude momentum modulation. Demonstrating this...
After the spherical theta pinch had been developed at Institute of Applied Physics in Frankfurt, considerable progress creating high efficiency and long lifetime plasma sources made. Several devices have built to study characteristics spherically confined plasma. Scaling rules investigated setups are presented, showing with electron densities up some 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">23</sup> m...
In the field of beam driven acceleration particles in plasma wakefields (PWFA), source medium is a crucial part accelerator setup. Gas discharges have proven to be reliable and simple type past experiments. Nevertheless, especially cells that aim for peak density range 1015 cm−3, physical apertures around 10 mm, lengths up several meters, stability discharge ignition pulse current waveform limiting applicability. We show successful mitigation these jitters 0.1 m argon gas cell, operating at...
We present a new method to determine the electron density of plasma by measuring periodicity modulations introduced longitudinal phase space relativistic particle bunch interaction with via self-modulation instability. As modulation is solely depending on and beam parameters, this allows time-resolved at position passage, which confirmed in particle-in-cell simulations. Densities range 3.6 × 1012 cm−3 – 7.2 1015 have been measured measurement accuracy comparison spectroscopic measurements.
Views Icon Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Twitter Facebook Reddit LinkedIn Tools Reprints and Permissions Cite Search Site Citation G. Loisch, Xu, A. Blazevic, B. Cihodariu-Ionita, J. Jacoby; Hydrogen plasma dynamics in the spherical theta pinch target for heavy ion stripping. Physics of Plasmas 1 May 2015; 22 (5): 053502. https://doi.org/10.1063/1.4919851 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley...
For plasma-wakefield accelerators to fulfil their potential for cost effectiveness, it is essential that energy-transfer efficiency be maximized. A key aspect of this the near-complete transfer energy, or depletion, from driver electrons plasma wake. Achieving full depletion limited by process re-acceleration, which occurs when decelerate non-relativistic energies, slipping backwards into accelerating phase wakefield and being subsequently re-accelerated. Such re-acceleration observed here...
There is a high demand for intense THz sources since “many excitation mechanisms of matter resonate in the terahertz regime” especially condensed matters. “Accelerator-based provide wide tunability together with intensity and repetition rates beyond 100 kHz, that will enable broad application at European XFEL to most interesting scientific problems field” [1]. Supported by proof principle study started Photo-Injector Test Facility located DESY Zeuthen site (PITZ). Since PITZ electron are...
A non-resonant streaming instability driven by cosmic-ray currents, also called Bell's instability, is proposed as a candidate for providing the required magnetic turbulence of efficient diffusive shock accelerations. To demonstrate saturation level and mechanism in laboratory environment, we attempt to develop an experiment at Photo Injector Test Facility DESY, Zeuthen site (PITZ). As electron beam used replace proton carry current our experiment, polarization will be modified from...
Various applications in modern particle accelerators or experiments involving high energy beams require a gas atmosphere involve the production of big amounts residual gas. Among these are, e.g., cells for plasma acceleration, jet targets, lenses. As beam quality and stable operation RF-accelerator cavities demand ultra-high vacuum (UHV) conditions, separation between pressure UHV beamline sections is needed. Commonly, this realized by differential pumping thin windows, main advantages...
Abstract An R&D platform for electron FLASH radiation therapy and biology is being prepared at the Photo Injector Test facility DESY in Zeuthen (FLASH lab @PITZ). This based on unique beam parameters available PITZ: ps scale bunches of up to 22 MeV with 5 nC bunch charge MHz repetition rate trains 1 ms length repeating 10 Hz. It works together Technical University Applied Sciences Wildau (TH Wildau) as partner close vicinity biological resources. A startup beamline has been installed...
Radio-frequency particle accelerators are engines of discovery, powering high-energy physics and photon science, but also large expensive due to their limited accelerating fields. Plasma-wakefield (PWFAs) provide orders-of-magnitude stronger fields in the charge-density wave behind a bunch travelling plasma, promising greatly reduced size cost. However, PWFAs can easily degrade beam quality bunches they accelerate. Emittance, which determines how tightly beams be focused, is critical for...
The undulator-based positron source is baseline design for the ILC. Recent progress in particular on undulator mask designs, optic matching devices (R&D prototypes pulsed solenoid, plasma lens) and target (rotating wheel, material tests) are discussed. adaption of an HALHF as upgrade option ILC included well.