Characterization of self-modulated electron bunches in an argon plasma

Groß, Matthias; Lishilin, Osip; Loisch, Gregor; Boonpornprasert, Prach; Chen, Ye; Engel, Johannes; Good, James; Huck, Holger; Isaev, Igor; Krasilnikov, M.; Li, X.; Niemczyk, Raffael; Oppelt, A.; Qian, Houjun; Renier, Y.; Stephan, F.; Zhao, Quantang; Brinkmann, R.; Ossa, A. Martínez de la; Osterhoff, Jens; Grüner, F.; Mehrling, Timon; Schroeder, C. B.; Will, I.

doi:10.1088/1742-6596/1067/4/042012

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…The method already enabled determination of plasma densities that were not accessible by spectroscopic methods due to low signal and signature strengths [23]. Also previously reported estimations of plasma densities by manual evaluation of the self-modulation periodicity [13,30] have been significantly extended to lower densities by the proposed method. To further improve the measurement accuracy, calculation of the plasma length from the LPS of the probe bunch is under investigation, which would allow the thermal expansion of the plasma to be monitored.…”

Section: Discussionmentioning

confidence: 99%

Plasma density measurement by means of self-modulation of long electron bunches

Loisch¹,

Asova

Boonpornprasert³

et al. 2019

Plasma Phys. Control. Fusion

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We present a new method to determine the electron density of a plasma by measuring the periodicity of modulations introduced to the longitudinal phase space of a relativistic particle bunch by the interaction with the plasma via the self-modulation instability. As the modulation is solely depending on the plasma density and the beam parameters, this method allows to determine the time-resolved density of a plasma at the position of beam passage, which is confirmed in particle-in-cell simulations. Densities in the range of 3.6×10 12 cm −3 -7.2×10 15 cm −3 have been measured and the measurement accuracy is confirmed by comparison to spectroscopic plasma density measurements.

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Section: Discussionmentioning

confidence: 99%

Plasma density measurement by means of self-modulation of long electron bunches

Loisch¹,

Asova

Boonpornprasert³

et al. 2019

Plasma Phys. Control. Fusion

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“…1. Reliable production of high quality electron beams by the PITZ gun along with its advanced beam diagnostics provides excellent opportunities for a wide field of interdisciplinary research activities [36,37,38,39,40]. More specific introduction of the gun, the booster cavity and the plasma cell at PITZ are given in the following subsections, respectively.…”

Section: Overview Of the Photo Injector Test Facility At Desy-zeuthenmentioning

confidence: 99%

“…An Argon gas discharge cell is used at PITZ as a plasma source (see Fig. 4) [31,38,39]. The cell consists of two 115 electrodes at the ends of a glass tube which is filled with Argon gas.…”

Section: The Gas Discharge Plasma Cellmentioning

confidence: 99%

Preliminary study for the laboratory experiment of cosmic-rays driven magnetic field amplification

Jao

Vafin

Chen

et al. 2019

High Energy Density Physics

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To understand astrophysical magnetic-field amplification, we conducted a feasibility study for a laboratory experiment of a nonresonant streaming instability at the Photo Injector Test Facility at DESY, Zeuthen site (PITZ). This non-resonant streaming instability, also known as Bell's instability, is generally regarded as a candidate for the amplification of interstellar magnetic field in the upstream region of supernova-remnant shocks, which is crucial for the efficiency of diffusive shock acceleration. In the beam-plasma system composed of a radio-frequency electron gun and a gas-discharge plasma cell, the goal of our experiment is to demonstrate the development of the non-resonant streaming instability and to find its saturation level in the laboratory environment. Since we find that the electron beam will be significantly decelerated on account of an electrostatic streaming instability, which will decrease the growth rate of desired non-resonant streaming instability, we discuss possible ways to suppress the electrostatic streaming instability by considering the characteristics of a field-emission-based quasi continuous-wave electron beam.

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Characterization of self-modulated electron bunches in an argon plasma

Cited by 2 publications

References 7 publications

Plasma density measurement by means of self-modulation of long electron bunches

Plasma density measurement by means of self-modulation of long electron bunches

Preliminary study for the laboratory experiment of cosmic-rays driven magnetic field amplification

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