Book/Dissertation / PhD Thesis

PUBDB-2023-07359

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png High-dimensional and ultra-sensitive diagnostics for electron beams

Jaster-Merz, S. M. (Corresponding author)DESY* ; Hillert, W. (Thesis advisor)CFEL*Extern* ; Burkart, F. (Thesis advisor)DESY* ; Stanitzki, M. (Thesis advisor)DESY*

2023
Verlag Deutsches Elektronen-Synchrotron Hamburg

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Please use a persistent id in citations: doi:10.3204/PUBDB-2023-07359

Report No.: DESY-THESIS-2023-022

Abstract: Detailed knowledge about particle beam properties is of great importance to understand and push the performance of existing and next generation particle accelerators.In this thesis, two novel contributions to the characterization of charged particle beams are presented.First, a new phase space tomography method is proposed and experimentally demonstrated.It provides the tomographic reconstruction of the full five-dimensional phase space of the particle beam, i.e., the charge density distribution in all spatial directions and the two transverse momenta. This is done by combining a quadrupole-based transverse phase-space tomography with the streaking of the beam at various angles using a PolariX transverse deflection structure.Detailed simulations show the ability of the method to reconstruct various complex phase-space distributions and its applicability to highly non-Gaussian beams. The experimental feasibility was demonstrated at the FLASHForward facility at DESY.The measurements performed with this technique enable previously unavailable information of the five-dimensional phase space of the electron beam to be reconstructed.Such information is essential in the future to improve the performance of accelerators.In addition to this method, a new diagnostic device based on silicon strip sensors and named Stridenas (Silicon STRIp DEtector for Novel Accelerators at Sinbad) has been developed to measure the profile and charge of femtocoulomb beams with low charge density.The characterization of these low-charge beams is essential for novel acceleration tests or medical studies at the ARES linac. Various prototypes of this detector have been built and tested experimentally, demonstrating their operability in a wide range of beam intensities spanning six orders of magnitude. This constitutes the confirmation of the capability of silicon strip sensors to measure the charge and profile of accelerator beams.These measurements reach from single electron detection up to 700 fC charge for the beam profile characterization and from 14 fC to2.5 pC for the beam charge measurement. Stridenas thereby extends the capabilities of existing diagnostic devices to a new charge range and demonstrates the applicability of silicon sensors as beam instrumentation devices.

Note: Dissertation, Universität Hamburg, 2023

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Contributing Institute(s):

1. Beschleunigerphysik (MPY)
2. Technol. zukünft. Teilchenph. Experim. (FTX)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Accelerator Research Experiment at SINBAD
2. DESY: TestBeamline 22 (DESY II)

Appears in the scientific report 2023

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